hourly turbulence forecasthourly turbulence forecast

. Partly cloudy. The time period when the sun is between 12 and 18 degrees below the horizon at either sunrise or sunset. Dreaming up a future getaway or just armchair traveling? Meteor. the BECMG or TEMPO groups. . Please report any errors you might find, here's how. A Terminal Aerodrome Forecast (TAF) is a concise statement of the expected Using data on forward velocity, wind speed, air pressure, roll angle, and other factors, the algorithm generates a local atmospheric turbulence level, which is fed back into a national system every minute. winds associated with convective activity or low wind speeds. We were thus able to retain only 197,000 observations for the statistics. WebWeather.gov > Alaska Aviation Weather Unit > Turbulence Forecasts . Mountains, storms, and the jet stream all affect airplane turbulence. Since November 2020, these forecasts are provided with a horizontal grid spacing of 0.25 up to 36 h forecast with 3 h steps, for nine vertical layers above 10,000 ft.

Please do not use these aviation weather forecasts for navigational purposes but aviation flight planning only. In the turbulence map, some regions at lower altitudes might not show data due to being below the terrain. Part I: Forecasting nonconvective turbulence.

The U.S. has no requirement to forecast temperatures in an aerodrome forecast and the NWS Check out our 52 Places to Go in 2023. He said that this type of turbulence, of all categories, is increasing around the world at all flight altitudes. Posted Mon 3 Apr 2023 at 12:03am. For the period 114 January 2019, which comprises 19,600 observations, we compare the high-resolution forecasts to the ensemble forecasts. Routine TAFs are prepared and filed approximately one-half hour prior to scheduled High temperature around 61F. 010524 - Amended forecast valid from the first at 0500Z till the second beginning hour and two-digit ending hour. time group. Hour-by-hour rainfall forecast for Wednesday, CLOSE TO HOME, WE DO HAVE SOME WEATHER IMPACTS TO TALK ABOUT TODAY. To illustrate the role of wind shear, isotachs of the 250 hPa wind speed have also been included in Figure 3. There are four classifications for turbulence: light, moderate, severe and extreme. Hourly. 051130Z In addition to physical tests in labs, where full-sized aircraft are subjected to stresses above and beyond what theyd encounter while airborne, Smith says that high-powered computing has made it possible to digitally model a wider range of hypothetical scenarios. Calm winds (three knots or less) are encoded as 00000KT.

Order a forecast by email written by our in house experts, Request the most accurate automated forecast available, instantly, Copyright 2005-2023 www.turbulenceforecast.com. Hour-by-hour rainfall forecast for Wednesday. (2021) should enable users to also compute offline an additional CAT product based on Ellrod1 and enable advanced postprocessing using non-linear regression and/or machine learning. For the period 114 January 2019, which comprises 19,600 observations, we compare the high-resolution forecasts to the ensemble forecasts. WebHourly Forecast for Friday 04/14. Patchy fog in the morning. And Boeing has begun to offer the algorithm as a purchase option for new aircraft, Sharman says. Q. J. R. Meteorol. The PROB40 group is used when the occurrence of thunderstorms or We will review the data in question. The comparison focuses on the height range 512 km, i.e. According to the Federal Aviation Administration, 146 passengers and crew were reported seriously injured by turbulence between 2009 and 2021.

Ellrod, G.P. change is expected in some or all of the forecast meteorological conditions. the steering is more sensitive in the vertical as aircraft are built to be stable in the lateral axis.

Turbulence is a psychological problem for the passenger whose only means of regulating anxiety is to avoid awareness of the flight. Huntington Beach, CA Cold & Flu. GlobalAir.com receives its data from NOAA, NWS, FAA and NACO, and Weather Underground.

Turbulence Forecast offers custom human written forecasts via email and the most accurate automated forecast to let you know what to expect on your next flight. Night Details. The EDR is proportional to the root-mean-square vertical acceleration experienced by an aircraft under specific flight conditions. LOUISVILLE, Ky. . Ordinary outdoor activities are not possible at this time without extra illumination. Height is given in hundreds of feet AGL up to and including 2,000 feet. The last two letters reflect the specific station identification. Each change shear is encoded with the contraction WS followed by a three-digit with the exception of a FM group, the new time period will include only those elements Each will continue to forecast icing and turbulence in AIRMETs and SIGMETs. If the location's three-letter identification does not begin with However, turbulence is inherently intermittent and reliable estimates of turbulence require an ensemble approach. Comparing these values to the ensemble, we see that the ensemble performs significantly better, with ensemble mean correlations attaining 0.37 for CAT2 and up to 0.40 for the combined product CAT12, while the CRPS is around 0.03 m2/3 s1. reports. Patchy fog in the morning.

Lows 47 to 51. Then, the final step and actual forecasting of the EDR consists in computing in each forecast Ellrod1, GWD and DISS and projecting the values on the climatological EDR.

have urged parents to secure young children in their own ticketed seats and in an approved safety seat. Use these tools to get aviation weather forecasts for U.S. airports, as well as to download the latest Terminal Area Forecast (TAF) report. Robert Sumwalt, a former chairman of the National Transportation Safety Board who now heads a new aviation safety center at Embry-Riddle Aeronautical University, stressed that it was impossible to prevent or predict all turbulence. And though its easy to understand turbulence created by thunderstorms, a relatively new discovery by researchers is that storms can generate bumpy conditions in faraway skies. The time period when the sun is between 6 and 12 degrees below the horizon at either sunrise or sunset. investigation. P6SM HIGHS UP TO 83 DEGREES IN THE MIDDLE OF THE AFTERNOON BEFORE WE TAKE TEN AND 20% STORM CHANCES AND INCREASE THOSE. Weather is included in the initial time group only if significant S o it's completely typical for weather challenges to pop up during The Masters. Beljaars, A.C.M., A.R. Low temperature around 51F.

Huntington Beach, CA Hurricane Tracker. Locale ({{ $root.SelectedLocaleLanguage | uppercase }}). These two ancient empires shaped Passover, How Csar Chvez changed the labor movement. Is the edge of a desert the right place to plant a forest? The horizon should be clearly defined and the brightest stars should be visible under good atmospheric conditions (i.e.

02:39 PM Mountain| Clear skies. As a result, you should not rely solely on the data available on this site in planning any flight. Climatol., 56, 317337.

valid period may be for less than 24 hours. 00:12. The wind, visibility, and sky condition elements are always included in the initial time precipitation is in the 30% to less than 50% range, thus the probability value TAF WE STILL HAVE SOME DOWNPOURS, BUT AGAIN, I DONT THINK THIS IS SEVERE, BUT IT KICKS OFF A WET THURSDAY MORNING THAT DRIES OUT INTO THE AFTERNOON AND TEMPERATURES TURNING MUCH COOLER FROM 88 TODAY TO 59. Valid Mostly clear in the evening. This computation has only to be done once. Huntington Beach, CA Allergy Forecast. Anyone can read what you share. Weather and Forecasting, 7, 150165. We better understand the atmosphere now, and our computing ability has meant we can provide better descriptions of turbulence, Sharman says. A South African entrepreneur built the worlds largest rhino farm. Turbulence Forecast offers the most accurate HD automated turbulence forecast maps, custom to your flights, so you can easily follow along as you fly and anticipate areas of turbulence.

Heres the science behind this natural and often scary phenomenonand how to cope with it during a flight. They are accustomed to turbulence and know it is not a threat to the plane. Thursday's full moon will usher in a period of relationship turbulence and family break downs according to astrologers - who warn against leaving the house this long weekend. Dew point will be around 46F with an average humidity of 65%. 5SM Routine OVC008CB Brown & N. Wood, 2004: A new parametrization of turbulent orographic form drag. 12s. The aim of the extensive pre-computations in Figure 1 is to fit log-normal distributions for each index in order to be able to project indices on the climatological EDR.

Turbulence forecasts only define where turbulence may develop. Cheung et al., 2018: Improvements in nonconvective aviation turbulence prediction for the world area forecast system. TAFs use the same weather code found in METAR weather TABLE 1Verification of different EDR parameters against observations for the high-resolution forecasts (HRES - grid spacing of about 9 km) for JanuaryMarch 2019 and for HRES and the ensemble forecasts (ENS - grid spacing of about 18 km) for the period 114 January 2019. Wind Partly cloudy. Though design changes like those would mainly address efficiency, turbulence does play a factor in aircraft performance and energy consumption: Flight path and altitude changes to avoid turbulence is estimated to cost U.S. airlines as much as $100 million a year, and burn an additional 160 million gallons of fuel per year. Canadian station identifiers start with C. Mexican and western Caribbean station The format is a Its good that the wing flexes; if it was so rigid that it didnt, the plane would probably be so heavy that it couldnt fly. Low temperature around 51F. 1200Z. Highs 72 to 77. Paul Williams, an atmospheric scientist at the University of Reading in the U.K., has estimated that by 2050 to 2080, changes to the jet stream from climate change will result in an increase of clear-air turbulence of 113 percent over North America, and as much as 181 percent over the North Atlantic. . The international TAF also contains forecast temperature, icing, and turbulence. significant weather occurs, the contraction NSW (No Significant Weather) In the turbulence map, some regions at Weather Underground provides local & long-range weather forecasts, weatherreports, maps & tropical weather conditions for the Spring Grove area. One still should be able to carry on ordinary outdoor activities. You are about to report this weather station for bad data. location's three-letter identification begins with an A, H, or G, the P is just added to It can WebTODAY'S NATIONAL OUTLOOK. one hour, in prevailing conditions is expected. We have put CAT based on the total dissipation rate (referred to as CAT2 in the article) into IFS Cycle 47r3, which is expected to become operational in the autumn of 2021. Becoming mostly sunny. Figure 3 shows global maps of two EDR-based diagnostics for CAT on 2 March 2019 as obtained from a 024 h forecast with a horizontal resolution of about 9 km. ECMWF Technical Memorandum No. Tomorrow 03/24.

Table 1 shows the point correlations and mean absolute error (MAE) against the observations of the high- resolution forecasts for January to March 2019. She's the last of her kind.

Feedback Cornman, G. Meymaris, J. Pearson & T. Farrar, 2014: Description and derived climatologies of automated in situ eddy dissipation rate reports of atmospheric turbulence. Becoming mostly sunny. Any temporary conditions expected during a specific time period are included with that Saturday Night: A chance of rain between 10pm and 3am, then a chance of snow after 3am. (VV) into the obscuration is forecast.

TAF AMD. ending times.

We have verified the daily high-resolution forecasts of CAT during the January to March 2019 test period. year=now.getFullYear(); Weather models cant predict turbulence at airplane-sized scales, and pilots frequently misreport turbulent locations by many dozens of miles. FM group contains all the required elements -- wind, visibility, weather, Cloudy. (2021). Read the full forecast here. Show Transcript. Both CAT1 and CAT2 underestimate the relative occurrence of weak turbulence intensities with EDR < 0.05 m2/3 s1 compared to the observations, which deviate from the log-normal law for small values.

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conditions to more or less a completely new set of prevailing conditions is associated SHRA

Part of the anxiety around turbulence is the fear of the aircraft failing. Partly cloudy in the morning. This composite image was created at London Heathrow Airport's runway 09L between 7 a.m. and 10 a.m. Mostly sunny skies. periods beginning at 0000Z shall be indicated as 00. KOKC miles followed by SM to note the units of measure. knots. But understanding what causes turbulence, where it occurs, and the high-tech tools pilots use to make air travel safer and more comfortable may help settle even the most anxious flyers nerves. Meteor. All data has been reduced to a 0.3 x 0.3 output grid on model levels.

Dew point will be around 45F with an average humidity of 73%. Note: PROB40 will not be shown during the first six hours of a forecast. We use Google Analytics Advertising Features to gather statistical data on our users demographics and interests and to send personalized advertising to people with similar profiles. The SPC has all of Greater Cincinnati under an Enhanced Risk (level 3 out of 5) for the chance for severe weather. Also included in Figure 1 (solid lines) are the log-normal fits to the individual distributions, as well as the climatological distribution of the EDR derived from aircraft data by Sharman & Pearson (2017). The climatological EDR distribution is denoted by the dashed grey curve. THATS ALREADY BEEN FUELING SOME SHOWERS AND A FEW RUMBLES OF THUNDER. Sara Nelson, the unions president, said in an interview that with turbulence becoming much more common lately, the need for young children to be properly secured in child safety seats during flights is a greater priority. Turbulence is worse at the back of the plane, she says.

The diagnostic will be available on model levels for the high-resolution forecast and the ensemble, therefore roughly satisfying the 0.1 horizontal and 300 feet vertical resolution requirements of the turbulence guidance product that is in development for the International Civil Aviation Organization by 2030 (Kim et al., 2018). In order to compare the IFS with observations, we have performed daily 24-hour forecasts for January to March 2019 and used hourly model output on the full vertical model resolution of 137 levels, but on a reduced horizontal grid of 0.3 x 0.3 to make the data volume more manageable. Turbulence is a psychological problem for the passenger whose only means of regulating anxiety is to avoid awareness of the flight. meteorological conditions at an airport during a specified period (usually 24 hours).

the ceiling is the lowest broken or overcast layer or vertical visibility into a complete Appended to the FM indicator is the four-digit hour and minute the change

Recent research indicates that turbulence is rising and that this change is sparked by climate change, specifically elevated carbon dioxide emissions affecting air currents. . Directional or variable visibility is not forecasted and the visibility group is

unspecified time within this time period. WebHourly Forecast for Today, Thursday 03/23. The time of Civil Sunset minus the time of Civil Sunrise. J. Appl. At NCAR, Sharman has been working since 2005 to build much more precise nowcasting turbulence tools. WebHourly Local Weather Forecast, weather conditions, precipitation, dew point, humidity, wind from Weather.com and The Weather Channel These mountain waves can propagate as wide, gentle oscillations into the atmosphere, but they can also break up into many tumultuous currents, which we experience as turbulence.

Posted Mon 3 Apr 2023 at 12:03am. document.write(year);

A variable wind direction The CRPS of the ensemble against observations directly compares to the MAE of the high-resolution forecasts. The decelerating winds create shear regions that are prone to turbulence. SO NORTHERN WASHINGTON COUNTY THROUGH LAWRENCE AND JACKSON COUNTY, BETWEEN BEDFORD AND SEYMOUR, ITS A WET RIDE ON THE US 50 CORRIDOR AND ALSO BACK OVER TO PAISLEY. * Requires performance cookies to function correctly. Hearst Television participates in various affiliate marketing programs, which means we may get paid commissions on editorially chosen products purchased through our links to retailer sites.

CAT is often the culprit behind moderate to severe injuries, as it can occur so suddenly that flight crew dont have time to instruct passengers to buckle up. Updated: 11:22 AM EDT Apr 5, 2023. (occasional), and are expected to occur during less than half the time period. 2SM Losing weight leads to better health? Dew point will be around 45F with an average humidity of 72%.

A FM group will mark the beginning of a new line in a TAF report. (2014). The total dissipation rate is a more useful CAT predictor in the planetary boundary layer than the Ellrod1 index. SOAR 1995 - 12s.

The EDR algorithm uses either the measured vertical accelerations or the aircraft vertical winds that are determined using the aircraft's angles of attack and cruising speed. We use Google Analytics to gather anonymous statistical data on the website usage.

Monitoring for maintenance issues has improved as well: onboard sensors keep track of components known to be vulnerable to fatigue, and flag that part for inspection or replacement.

are the only cloud type forecast in TAFs. group of the forecast.

S o it's completely typical for weather challenges to pop up during The Masters. Sharman, R., L.B. Cumulonimbus clouds (CB) Global icing and turbulence products as well as a robust global lightning network.

will then be issued for these locations after two complete observations are received. It's been a dry and mild start so far Wednesday. Highs 69 to 74. About If youve ever watched a placid thread of rising smoke break up into ever more disorganized swirls, youve witnessed turbulence. indicator marks a time group within the TAF report. They flag where and when turbulence might happen. It also avoids the increased computational burden of 4% that is associated with the computation of the horizontal gradients in the latter.

The contraction KT follows to denote the units of wind speed in The linear combination of CAT1 and CAT2 seems to perform best. Turbulence forecasts can cause unnecessary anticipatory anxiety.

Furthermore, we expect that an observable measure of turbulence intensity computed in the forecast will be beneficial for research purposes, in particular the development of turbulence parametrizations in the free troposphere and stratosphere. . Routine TAFs are valid for 24-hours. previous time group. The wind shear element is omitted if not expected to occur.

Finally, the detailed information provided in the Technical Memorandum by Bechtold et al. The values represent averages over the whole day and the 1012 km atmospheric layer. Mainly clear skies. The following change indicators are used when either a rapid, gradual, or temporary OVC012 BECMG 1416 BKN020 - Ceiling one thousand two hundred overcast. & D.I. Dr. Williams's research has found that clear air turbulence, which occurs most frequently at high altitudes and in winter, could triple by the end of the century. Mostly clear in the evening. Over 12,000 Delta Airlines pilots currently use tablets loaded with the tool to check conditions along their flight paths. current forecast. Winds will be 8 mph from the SSE.

over a longer time period, usually two hours. Could airplane design be changed to eliminate the experience of turbulence altogether?

period in which significant weather has been forecast, a change to a forecast of no WERE DEALING WITH SOME OF THOSE DOWNPOURS THAT HAVE NUDGED IN JUST NORTH OF YOU IN SALEM. We spoke to a handful of experts to learn more about the tricky-to-predict weather phenomenon. The TAF code, as described here, is the Follow-up reports are then also generated. Low 51F. The method has the advantage that it can be applied to widely used predictors of CAT in aviation forecasting and to the output of the turbulence scheme of the IFS. Traffic Guide, Aviation Routine, Weather Report (METAR), Aerodrome Forecast (TAF), Page loaded:

We essentially follow the method presented in Sharman & Pearson (2017).

The FM group is used when a rapid change, usually occuring in less than The computation of the Ellrod1 index increases the numerical cost of an IFS forecast by 45% as it requires additional inverse spectral transforms of the vorticity and the divergence fields to compute the required horizontal wind gradients. It should be noted that,

If you stay fastened youre far less likely to incur an injury, said Thomas Guinn, a professor of Applied Aviation Sciences at Embry-Riddle Aeronautical University. This is also consistent with the probability density functions in Figure 2. (2021). For the shorter January test period, the correlations attain values between 0.32 for CAT2 and 0.36 for CAT12, while the MAE remains around 0.05 m2/3 s1. And dont try to hand babies across the aisle or give coffee back to cabin crew who are trying to secure loose objects. TAF sky condition forecasts use the METAR format. The format for vertical visibility are two types of TAF reports, a routine forecast, TAF, and an amended forecast,

High 66F. Maximum daily and layer mean values of between 0.1 and 0.18 are present near the flanks of the subtropical jets and in the storm tracks, but also over orography such as the Rocky Mountains and the Himalayas.

Verification statistics are correlation (Corr), mean absolute error (MAE) and continuous ranked probability score (CRPS). Jennifer Stroozas, a meteorologist at the National Weather Services Aviation Weather Center, called turbulence definitely one of the more challenging things to predict.. This is a significant improvement to NOAAs Graphical Turbulence Guidance (GTG-3) product that now includes an analysis and forecast for clear air turbulence as well as turbulence from mountain wave activity with a new forecast updated every hour.

Without the need to confine smaller electric engines beneath the wing, they could be located almost anywhere on a planes body along with multiple smaller fans to propel the plane forward. And it can be invisible both to the eye and weather radar. The rapid growth of storm clouds pushes air away, generating waves in the atmosphere that can break up into turbulence hundreds to even thousands of miles away, says Robert Sharman, a turbulence researcher at the National Center for Atmospheric Research (NCAR). Rough air happens everywhere, from ground level to far above cruising altitude. .

The 24 indication applies to all time group Turbulence is unstable air movement that is caused by changes in wind speed and direction, such as jet streams, thunderstorms, and cold or warm weather fronts. On a cargo flight, pilots don't bother to change altitudes. Last month, the Association of Flight Attendants-CWA, a union representing about 50,000 flight attendants across 19 airlines, renewed its decades-long push for every passenger to have their own seat, no matter their age. Low temperature around 55F. Please be respectful of copyright.

by fractions of statute miles are separated with a space, for example, 1 1/2SM. Dew point will be around 50F with an average humidity of 75%. In air travel, turbulence is a certainty and a major source of flight anxiety for flyers of all stripes. Contact. In the case of an amended forecast, or a forecast which is corrected or delayed, the Highs 66 to 70. Probiotics, prebiotics, postbiotics. Sharman, R.D. previous time period. Am. See a rare planetary alignmentbefore its too late, Plan a pilgrimage to Montenegros sacred sites, How Aboriginal people are using tourism to tell their stories, Experience: The Festival of the Giant Omelette, Author Pico Iyer on finding the ancient spirits of Koyasan, Japan. WERE IN THE LOWER AND MIDDLE SEVENTIES FROM 77 AND ALI INTERNATIONAL 73, 74 DEGREES AT BOWMAN FIELD, SALAZAR, BERG, FORT KNOX AND ELIZABETH TOWN. High temperature around 61F.

Consult the bees. Turbulence forecasts do not mean there will be turbulence, but only that turbulence is possible in the designated areas. All the planes cruising in an area are on the same radio frequency. Pilots hear reports of turbulence from other pilots. If the turbulence is on their route, pilots ask for a change of altitude. His research suggests that we could encounter bumpier flights in the coming years, which could potentially result in more passenger and crew injuries.

Therefore, we have also evaluated ensemble forecasts (ENS) of CAT, comprising a 15-member ensemble at a resolution of about 18 km that was run daily during the first two weeks of January 2019..

There Thats what the fear is about, mostly, the lack of a sense of control, Poole says. Mostly sunny. 04:39 PM Eastern, TAF (Terminal Aerodrome Forecasts) How To Decode, National Centers for Environmental Prediction, N A T I O N A L W E A T H E R S E R V I C E, National Oceanic and Atmospheric Administration. Show Transcript. The aircraft is more sensitive to vertical gusts than to lateral gusts, i.e. The aviation weather information available includes icing, turbulence, convection, PIREP, METAR, TAF, AIRMET, SIGMET, satellite, radar, surface, winds aloft, temperature, NEXRAD, precipitation, rain, snow, sleet, thunderstorm, enroute, and prognostic charts. WebThe maps are generated using data from the GTG and GFS forecasts provided by NOAA/NWS. We strives to maintain current and accurate data. respectively. Turbulence also presents a greater threat to small planes that are more susceptible to changes in wind speed, rather than larger commercial airliners, Ms. Stroozas of the National Weather Service said. Smith says likely not, at least in the near term. and sky condition. This means that a certain number of turbulence predictors are projected onto the observed climatological distribution of the EDR, and then a suitable CAT parameter is defined. Copyright TWC Product and Technology LLC 2014, 2023.

The SPC has all of Greater Cincinnati under an Enhanced Risk (level 3 out of 5) for the chance for severe weather. . WebGTG 2hour Turbulence Forecast High-resolution simulations This material is based upon work supported by the National Center for Atmospheric Research, a major facility sponsored by the National Science Foundation and managed by the University Corporation for Atmospheric Research. WebArea Forecasts; Sfc Chart & Flight Cat; Icing; Turbulence; SIGWX Graphics (24-60 hr) Convection; Winds Aloft; Surface Analysis (NCEP) 3-7 Day Outlook; Soaring Index; Model

height, slant character, and winds at the height indicated in the same format as surface or sky condition which are expected to last for generally less than an hour at a time And in December, about two dozen people, including an infant, were hurt on a Hawaiian Airlines flight from Phoenix to Honolulu that hit rough air shortly before landing. part-time basis (less than 24 hours/day) the TAFs issued for those locations will have BUT ITS LATER AS WE GET INTO THE AFTERNOON THAT WE WATCH THIS MAIN LINE OF SHOWERS AND THUNDERSTORMS ROLL THROUGH.

Becoming mostly sunny. issuance times. Industry-leading benefits will include: Radar reflectivity in areas outside of North America including Europe, Japan and Australia. BR Forecast

Turbulence is unstable air movement that is caused by changes in wind speed and direction, such as jet streams, thunderstorms, and cold or warm weather fronts. 2023, Hearst Television Inc. on behalf of WLKY-TV.

Mostly sunny.

Copyright 1996-2015 National Geographic Society, Copyright 2015-2023 National Geographic Partners, LLC. The following three predictorshave been included to obtain a measure of the EDR: The numerical expressions for Ellrod1, GWD and DISS are presented in detail in Bechtold et al. Winds SSW at 10 to 15 mph. A Fourier transform is performed on the 8 Hz sampled vertical velocity time series (with a cruise speed of 250 m s1, this retains eddies of 30 m that can significantly affect the aircraft wings), and a von Krmn spectrum is fitted to the retrieved vertical velocity spectrum in the inertial turbulent subrange. We have defined CAT parameters/products based on the EDR projections of the three indices, Ellrod1, GWD and DISS, as follows: where the asterisk denotes the value of the index after the EDR projection. WebMap of Turbulence Conditions Updated Every Hour Use these tools to get aviation weather forecasts for U.S. airports, as well as to download the latest Terminal Area Forecast (TAF) Strong to severe storms are expected for parts of the region this evening.