A briefly intensifying storm within a low-level jet produced an isolated wind gust at the Storm Lake Airport.
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The episode as NWS FSD wrote it up.
A briefly intensifying storm within a low-level jet produced an isolated wind gust at the Storm Lake Airport.
The local office's own words before the first event, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.
NWS Sioux Falls, SD wrote its last area forecast discussion before the first event at Aug 3, 5:12 AM CST, 7 minutes earlier.
AREA FORECAST DISCUSSION National Weather Service Sioux Falls SD 612 AM CDT Wed Aug 3 2022 .SHORT TERM...(Today and Tonight) Issued at 354 AM CDT Wed Aug 3 2022 Early morning satellite imagery shows increased cloud coverage across the region as some showers and thunderstorms remain present, with water vapor imagery showing the main shortwave sitting off to our southwest. As the wave continues to shift eastwards, this will bring a "cool" cold front through the area, starting to move through east-central South Dakota by around sunrise and exiting our SW MN and NW IA counties by the late morning hours. This will continue our rain chances, especially for areas along and east of I-29, though at most an additional tenth of an inch is expected. Behind the "cool" front, as the quotation marks imply, temperatures won't be anywhere near cool but will still be a welcome relief as temperatures will be at least 10 degrees lower than they were on Tuesday. Temperatures along and north of I-90 will generally peak in the lower to mid 80s, possibly in the lower 90s along the MO River Valley, and in the upper 80s to lower 90s south of I-90. Further adding more relief, dewpoints behind the front will be in the lower to mid 50s, keeping heat index values generally in the lower to upper 80s, though areas along and south of the highway 20 corridor could sneak up into the lower 90s. The wind behind the front will be from the north and sustained in the teens, with gusts around 20 mph, though we could see a couple gusts near 30 mph as the inversion washes out this morning. Mostly a concern for areas west of the I-29 corridor, the lower relative humidity values combined with the breezy winds will result in elevated fire weather concerns as RH's dip down into the mid 20s to mid 30s during the afternoon hours. A surface high pressure comes sliding down from southern Canada throughout the evening hours, leading to a quiet overnight period. Minimum temperatures Thursday morning will be a touch below normal, in the mid 50s to lower 60s across the area. .LONG TERM...(Thursday through Tuesday) Issued at 354 AM CDT Wed Aug 3 2022 For Thursday, the high pressure system slides off to our east throughout the morning hours as an upper level ridge builds off to our west. This will result in winds coming out of the south- southwest, becoming breezy for areas west of I-29 as the surface pressure gradient tightens due to our next approaching surface low moving in from the west. With relative humidity values again in the mid 20s to mid 30s, elevated fire weather conditions are expected as wind gusts will be approaching 30 mph during the afternoon hours. Temperatures along and west of I-29 will peak into the upper 80s to mid 90s, with areas east in the mid to upper 80s, with ample sunshine for all. A warm and breezy day is expected for Friday as the upper level flow flattens before turning southwesterly and the region falls into the developing warm sector at the surface. Comparing the ensembles utilizing the ensemble situational awareness tables show that the GFS warm bias continues into Friday. Probabilities for reaching 100 degrees remain very high for the entire area in the GFS world, with much lower probabilities in the other ensembles, mostly showing areas west of I-29 having a chance at hitting 100 which is what the NBM shows. Due to the increased surface pressure gradient breezy southerly wind will overspread the region throughout the day sustained in the upper teens to lower 20s, with gusts 25 to 35 mph. With dewpoints again in the lower to mid 60s, heat index values west of I-29 will again be near or above 100, with areas east in the 90s. Due to the combination of hot, dry, and breezy conditions, elevated fire weather will again be present. While there are still timing and spatial details to iron out, by the late afternoon hours ensembles show the cold front moving into the area. This forcing should be enough to create scattered showers and thunderstorms lasting into the overnight period, with potential for severe weather given 500-1500 J/KG of CAPE and bulk shear between 30 to 40 knots. It is worth mentioning that model concensus is not high on the severe weather parameters, so that could change with future model runs, with SPC highlighting portions of the region with isolated chances for severe weather. Cooler temperatures are expected behind the front in the upper 70s and lower 80s, though the models do leave a boundary hanging around the region which could keep areas south of this front in the upper 80s to lower 90s. Again depending on where the boundary ends up setting up, more chances for rain will be possible on Saturday and again on Sunday as a more pronounced shortwave takes aim at the northern plains. Ensembles show another ridge of high pressure aloft developing across the western CONUS by early next week, likely resulting in another round of at or above normal temperatures with few chances for rainfall. && .AVIATION...(For the 12Z TAFS through 12Z Thursday morning) Issued at 612 AM CDT Wed Aug 3 2022 VFR conditions throughout the TAF period. Winds will remain variable into the morning hours, but a front will be moving through from the northwest into the southeast bringing northerly winds behind it. Could see a couple gusts near 30 mph as the inversion mixes out around 7 am, with otherwise sustained winds in the teens and gusts in the 20s. && .FSD WATCHES/WARNINGS/ADVISORIES... SD...NONE. MN...NONE. IA...NONE. NE...NONE. && SHORT TERM...APT LONG TERM...APT AVIATION...APT
Hazardous Weather Outlook National Weather Service Sioux Falls SD 511 AM CDT Wed Aug 3 2022 NEZ013-SDZ038>040-050-052>071-041015- Dixon-Beadle-Kingsbury-Brookings-Gregory-Jerauld-Sanborn-Miner-Lake- Moody-Brule-Aurora-Davison-Hanson-McCook-Minnehaha-Charles Mix- Douglas-Hutchinson-Turner-Lincoln-Bon Homme-Yankton-Clay-Union- 511 AM CDT Wed Aug 3 2022 This Hazardous Weather Outlook is for northeast Nebraska, central South Dakota, east central South Dakota, south central South Dakota and southeast South Dakota. .DAY ONE...Today and tonight. Breezy northerly winds behind the front today combined with relative humidity values in the mid 20s to mid 30s will create elevated fire weather conditions. Excercise caution with any activities that may spark a fire. .DAYS TWO THROUGH SEVEN...Thursday through Tuesday. Thursday will see relative humidity values again in the mid 20s to mid 30 with marginally breezy winds, with similar conditions on Friday though winds will be a touch stronger keeping fire weather conditions elevated. Heat returns on Friday with chances for reaching 100 degree or above heat index values. While details are uncertain, chances for severe weather return Friday afternoon into the evening hours. .SPOTTER INFORMATION STATEMENT... Spotter activation is not expected at this time. IAZ001>003-012>014-020>022-031-032-MNZ071-072-080-081-089-090-097- 098-NEZ014-041015- Lyon-Osceola-Dickinson-Sioux-O'Brien-Clay-Plymouth-Cherokee- Buena Vista-Woodbury-Ida-Lincoln-Murray-Cottonwood-Nobles-Jackson- Pipestone-Rock-Dakota- 511 AM CDT Wed Aug 3 2022 This Hazardous Weather Outlook is for northwest Iowa, west central Iowa, southwest Minnesota and northeast Nebraska. .DAY ONE...Today and tonight. Hazardous weather is not expected at this time. .DAYS TWO THROUGH SEVEN...Thursday through Tuesday. Thursday will see relative humidity values in the mid 20s to mid 30 with marginally breezy winds, with similar conditions on Friday though winds will be a touch stronger, resulting in elevated fire weather conditions. Heat returns on Friday with chances for reaching 100 degree or above heat index values. While details are uncertain, chances for severe weather return Friday afternoon into the evening hours. .SPOTTER INFORMATION STATEMENT... Spotter activation is not expected at this time.
The Des Moines radar (KDMX), 158 km away, was scanning. The volume nearest the first event began at 11:18 UTC.
1 thunderstorm wind. Local standard time, as filed.
A thunderstorm wind gust of 70 mph was measured by Automated Weather Observing System site KSLB southwest of Storm Lake.
After NWS Directive 10-1605, the rules offices file Storm Data by.
Every storm in Iowa in 2022Every state in 2022This day in weather historyWarnings in Iowa, August 2022
NOAA National Centers for Environmental Information, Storm Events Database, compiled from the National Weather Service’s monthly Storm Data. Complete through 2026-06; NCEI adds each month about 75 days after it ends and revises past years a few times a year. Rebuilt 2026-09-24. Each event’s entry at NCEI: 1054544.