Heavy rains produced some flooding of county roads north of Sunol, Nebraska.
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Deaths and injuries are direct and indirect together, as the offices filed them. Damage is property and crops in the dollars of the year, not adjusted for inflation, and only where an office estimated it.
The episode as NWS CYS wrote it up.
Heavy rains produced some flooding of county roads north of Sunol, Nebraska.
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 Cheyenne, WY wrote its last area forecast discussion before the first event at May 28, 2:20 PM MST, 3 hours 10 minutes earlier.
AREA FORECAST DISCUSSION NATIONAL WEATHER SERVICE CHEYENNE WY 320 PM MDT MON MAY 28 2007 .SHORT TERM...TONIGHT THROUGH WEDNESDAY...LINE OF FAIRLY STRONG TSTMS ALONG PRE-FRONTAL TROUGH/DRYLINE FROM EAST OF KCDR SW TO NEAR PINE BLUFFS. OTHER EVEN STRONGER TSTMS ARE CURRENTLY N AND NW OF KDGW...CLOSER TO COLD FRONT. DEWPOINT TEMPS HAVE LOWERED SUFFICIENTLY ENOUGH THAT BEST THREAT OF SEVERE TSTMS SHOULD BE LIMITED TO EAST CENTRAL WY AND NORTHERN PANHANDLE THIS EVENING. PER RADAR AND SATELLITE...THERE WILL CERTAINLY BE GOOD COVERAGE THIS EVENING THOUGH FROM SCATTERED SW TO LIKELY NORTH. WILL ALSO BE SOME LINGERING SHOWERS/TSTMS AFTER 06Z TONIGHT ESPECIALLY OVER NORTHERN CWA AND NEAR MOUNTAINS OF SOUTHERN WY. FIRE WX CONCERNS OVER SOUTH CENTRAL WY DUE TO BREEZY CONDITIONS AND LOW HUMIDITIES WILL ABATE AROUND MID EVENING AS COLD FRONT GETS A RENEWED PUSH TO THE SE. THIS FRONT WILL BE THROUGH ALL OF CWA LATER TONIGHT AS UPPER LOW SHIFTS INTO NW WY. UPPER LOW TRACKS ACROSS NORTHERN WY TUESDAY AND THEN PARKS OVER NERN WY/WESTERN SD FOR TUE NIGHT/WED. 12Z NAM/WRF RUN IS MUCH BETTER AGREEMENT WITH GFS ON THIS. THIS WILL MEAN AN UNSETTLED AND COOL PATTERN FOR TUE AND WED WITH SCATTERED SHOWERS AND SOME AFTERNOON AND EVENING TSTMS...SO HAVE BOOSTED CLOUDS AND POPS A BIT AND GONE WITH COOLER TEMPS. HIGHEST POPS OVER EAST CENTRAL WY CLOSER TO WRAP AROUND FROM UPPER LOW. .LONG TERM...WED NIGHT THROUGH MON. MODELS ARE STARTING TO COME TOGETHER IN DEPICTING THE SLOW MOVEMENT OF THE CUTOFF LOW LINGERING OVER THE DAKOTAS THU AND FRI. CYCLONIC NORTHWESTERLY FLOW ALOFT OVER THE FORECAST AREA THU WILL LOSE MOST OF ITS CYCLONIC CURVATURE FRI BUT WILL REMAIN FROM THE NORTHWEST THROUGH MON AS AN UPPER RIDGE APPROACHES THE REGION FROM THE WEST. SURFACE TEMPERATURES WILL REBOUND THU WITH SHOWERS AND THUNDERSTORMS POSSIBLE PRIMARILY FROM THE MOUNTAINS EASTWARD. FRI AND SAT WILL BE DRY AS THE MOISTURE AND LIFT MOVE EAST OF THE REGION. THE WARMING TREND WILL CONTINUE FRI AND SAT. DRY AND WARM WEATHER WILL CONTINUE SUNDAY AND MON WITH SURFACE HIGH PRESSURE DOMINATING THE AREA. && .AVIATION...VFR CONDITIONS EXPECTED OVERALL TONIGHT AND TUESDAY. MVFR CEILINGS AND VSBYS POSSIBLE NEAR STRONGER TSTMS LATE THIS AFTERNOON AND EVENING MAINLY FROM KDGW TO KAIA. WILL ALSO BE SOME LOCAL MVFR CEILINGS BEHIND COLD FRONT LATER TONIGHT INTO MID MORNING TUESDAY MAINLY OVER NORTHERN AND WESTERN CWA. && .CYS WATCHES/WARNINGS/ADVISORIES... WY...NONE. NE...NONE. && SHORT TERM/AVIATION...JLH LONG TERM...JR
HAZARDOUS WEATHER OUTLOOK NATIONAL WEATHER SERVICE CHEYENNE WY 1104 AM MDT MON MAY 28 2007 WYZ061>070-291200- SOUTHWEST CARBON-NORTH CARBON-SNOWY RANGE-NORTH LARAMIE RANGE- LARAMIE VALLEY-LARAMIE RANGE-PLATTE-GOSHEN-CHEYENNE FOOTHILLS- PINE BLUFFS- 1104 AM MDT MON MAY 28 2007 THIS HAZARDOUS WEATHER OUTLOOK IS FOR SOUTHEAST WYOMING. .DAY ONE...TODAY AND TONIGHT SCATTERED THUNDERSTORMS ARE EXPECTED THIS AFTERNOON AND EVENING. SINCE LOW LEVEL MOISTURE AND INSTABILITY WILL BE LACKING...SEVERE STORMS ARE NOT EXPECTED. HOWEVER...A FEW OF THE THUNDERSTORMS MAY STILL PRODUCE BRIEF WIND GUSTS NEAR 50 MPH AND SOME SMALL HAIL. A FEW LIGHT RAIN SHOWERS WILL ALSO LINGER OVERNIGHT. IN THE MOUNTAINS...AND AT LOWER ELEVATIONS OF CARBON AND ALBANY COUNTIES...BREEZY AND WARM CONDITIONS THIS AFTERNOON WILL COMBINE WITH LOW HUMIDITIES TO CAUSE INCREASED FIRE DANGER POTENTIAL. THESE CONDITIONS WILL IMPROVE DURING THE EVENING HOURS. .DAYS TWO THROUGH SEVEN...TUESDAY THROUGH SUNDAY THERE WILL BE A FEW LATE DAY THUNDERSTORMS MAINLY NEAR THE NORTHERN COLORADO BORDER ON TUESDAY. WEDNESDAY WILL BRING A CHANCE OF SHOWERS AND SOME WEAK AFTERNOON AND EVENING THUNDERSTORMS. .SPOTTER INFORMATION STATEMENT... SPOTTER ACTIVATION IS NOT ANTICIPATED. && THIS PRODUCT...ALONG WITH OTHER WEATHER...HYDROLOGIC...AND CLIMATE INFORMATION IS AVAILABLE ON THE WEB AT... HTTP://WEATHER.GOV/CHEYENNE NEZ001>003-019>021-054-055-WYZ059-060-291200- SIOUX-DAWES-BOX BUTTE-SCOTTS BLUFF-BANNER-MORRILL-KIMBALL- CHEYENNE-CONVERSE-NIOBRARA- 1104 AM MDT MON MAY 28 2007 THIS HAZARDOUS WEATHER OUTLOOK IS FOR THE WESTERN NEBRASKA PANHANDLE AND SOUTHEAST WYOMING. .DAY ONE...TODAY AND TONIGHT SCATTERED THUNDERSTORMS WILL DEVELOP THIS AFTERNOON AND CONTINUE THROUGH THE EVENING. SOME OF THE THUNDERSTORMS MAY BECOME SEVERE WITH LARGE HAIL AND WIND GUSTS TO 60 MPH. .DAYS TWO THROUGH SEVEN...TUESDAY THROUGH SUNDAY THERE WILL BE A SLIGHT CHANCE OF LATE DAY THUNDERSTORMS TUESDAY OVER EAST CENTRAL WYOMING AND ACROSS THE FAR SOUTHERN NEBRASKA PANHANDLE. SCATTERED SHOWERS AND SOME WEAK THUNDERSTORMS ARE EXPECTED WEDNESDAY AND WEDNESDAY NIGHT. .SPOTTER INFORMATION STATEMENT... SPOTTER ACTIVATION WILL LIKELY BE NEEDED THIS AFTERNOON AND EVENING...ESPECIALLY IN THE NEBRASKA PANHANDLE. && THIS PRODUCT...ALONG WITH OTHER WEATHER...HYDROLOGIC...AND CLIMATE INFORMATION IS AVAILABLE ON THE WEB AT... HTTP://WEATHER.GOV/CHEYENNE JLH
The Cheyenne radar (KCYS), 168 km away, was scanning. The volume nearest the first event began at 00:28 UTC.
1 flash flood. Local standard time, as filed.
Water up to 6 inches deep over two county roads.
After NWS Directive 10-1605, the rules offices file Storm Data by.
Every storm in Nebraska in 2007Every state in 2007This day in weather historyWarnings in Nebraska, May 2007
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: 24280.