1 thunderstorm wind, as filed by the National Weather Service.
Every event with a place to put it. Tap one for its entry below.
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 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 Omaha, NE wrote its last area forecast discussion before the first event at May 27, 3:45 AM CST, 7 hours 35 minutes earlier.
AREA FORECAST DISCUSSION NATIONAL WEATHER SERVICE OMAHA/VALLEY NE 445 AM CDT THU MAY 27 2004 .DISCUSSION... SHORT TERM CONCERNS EARLY THIS MORNING...CONVECTION THAT HAS STEADILY DEVELOPED NORTHWARD INTO NE KS AND ISOLD ECHOES IN SE NEB ...STRATUS AND FOG...AND RISK FOR ISOLD TSRA TONIGHT AND FRI NIGHT. BEYOND FRIDAY...CHANCE OF TSRA SAT THROUGH MON AND POTENTIAL FOR HEAVY RAIN AND SEVERE...TEMPERATURES THROUGHOUT THE PERIOD. THE LATEST SURFACE MAP HAS THE FCST AREA IN-BETWEEN FRONTAL SYSTEMS...WITH ONE CENTER OF LOW PRESSURE OVER NRN MN AND A TROF EXTENDING SOUTHWARD INTO NEBRASKA E OF ONL. THE SECOND AREA OF LOW PRESSURE WAS OVER SOUTHWEST KANSAS...WITH THE FRONT DRAPED ACRS SRN KS AND SRN MO. WITH THE SFC TROF...THERE HAVE BEEN A FEW ECHOES OVER NE NEB AND A FEW AHEAD OF THE TROF IN OVER HALL THRU YORK COUNTIES IN CENTRAL NEBRASKA. OF NOTE ON THE STLT 11-3.9 MICRON SATELLITE IMAGERY WAS THAT THE STRATUS WAS MAKING NORTHWARD PROGRESS INTO NE KS AND VISIBILITIES WERE BEGINNING TO COME DOWN AT MCI AND TOP. THE RETURN OF HIGHER DEWPOINTS WAS NOTED YESTERDAY...WITH 1 DEG DEWPOINT SPREADS PROGGED. THE SOUNDING FROM OAX THIS EVENING HAD SOME CAPE (400 J/KG) AND BUFKIT WAS A BIT MORE AGGRESSIVE WITH 700-1000 J/KG DURING THE EVENING. THIS MORNING...CONVECTION HAS DEVELOPED NORTHWARD INTO SE NEBRASKA AND ALSO SOME MID CLOUDS WERE THICKENING OVER CNTRL NEB. RH NOSES INTO SE NEB EARLY THIS AM WITH FAVORABLE THETA-E ADVECTION...AND QUICKLY MOVES INTO SE IA AND MO. THERE WAS ALSO A JET STREAK PASSING THROUGH THE CENTRAL PLAINS. IN ADDITION...LOW CLOUDS AND FOG HAVE PRESSED NORTHWARD AND WILL LIKELY EXPAND THIS MORNING...BEFORE SHIFTING TO THE EAST AND GIVING WAY. ISOLATED -TSRA WERE INCLUDED EARLY ON IN SE NEB AND SW IA. AREAS OF FOG...SOME PATCHY NCNTRL AND SOME DENSE SE WERE MENTIONED. LOOK FOR PARTLY CLOUDY SKIES THIS AFTERNOON AS THE TROF SHIFTS OFF TO THE E WITH NORTHWEST WINDS. HIGHS WERE IN THE 70S WED AND LOOK FOR READINGS TO RANGE FROM THE UPR 70S N TO MID 80S SOUTH. THE PATTERN HAS SOME SUBTLE SHORTWAVE TROF PASSAGES LIKE THE ONE WED EVE. THESE ARE TOUGH TO TIME AND DO NOT GIVE MUCH COVERAGE. THIS AFTERNOON AND TONIGHT...THERE IS ANOTHER JET STREAK WHICH WILL AFFECT NE NEB AND WRN IA AND SOME RH AVAILABLE AND SOME INSTABILITY ...THOUGHT THERE MAY BE ISOLATED -TSRA POSSIBLE NE. FRIDAY MORNING...WAA INCREASES AND THE MID LEVEL RIDGE BUILD. S WINDS TO RETURN HIGHER LEVEL RH TO THE AREA AND SOME CHC OF -TSRA POSSIBLE. HAVE ONLY MENTIONED ISOLD -TSRA NORTH. TEMPERATURES WILL BE TRICKY WITH A MIX OF CLOUDS AND SUN. HAVE HIGHS FRIDAY IN THE 80S. THE LOW LEVEL JET INCREASES FRI AFTERNOON AND EVENING ALONG WITH THE INSTABILITY FROM HEATING DURING THE DAY. COULD SEE A -TSRA IN THE CWA AND INCLUDED A MENTION IN THE SE. BEYOND FRIDAY...A MID LATITUDE TROF ADVANCES EASTWARD INTO THE PLAINS AND A SFC FRONT OVER THE WRN PLAINS MOVES INTO THE CWA. THE STORM PREDICTION CENTER HAS KEPT THE CWA OUT OF THE SLIGHT RISK...HOWEVER...HPC HAS A 1 TO 3 INCH BULLSEYE OF RAINFALL OVER WRN IA WITH THE SLOW MOVING FRONT. WHILE THE ETA FAVORS NE NEBRASKA...THE GFS FAVORS WRN IA. INCREASED POPS FOR SAT AFTERNOON AND SATURDAY NIGHT AND MENTIONED HEAVY RAINFALL IN THE IA ZONES. ERN NEB COULD SEE THE HEAVY RAIN AS WELL...SO WILL NEED TO WATCH THIS. MOST OF THE PRECIPITATION SHOULD HAVE ENDED BY SUN AM...HOWEVER LEFT IN SOME POPS SUN AND MON DUE TO VARIABILITY OF CHC OF RAIN THE LAST COUPLE OF DAYS. ...THUS THE HOLIDAY IS NOT LOOKING AS PESSIMISTIC. TUESDAY THRU THUR HIGHS SHOULD BE IN THE 70S DEPENDING ON HOW BROAD THE TROF OVER SRN CANADA AND THE NORTHERN PLNS IS. && .OAX WATCHES/WARNINGS/ADVISORIES... NE...NONE. IA...NONE. && NOTE...EFFECTIVE 1200 UTC JUNE 8TH THE AWIPS PRODUCT IDENTIFIER /PID/ FOR THE AREA FORECAST DISCUSSION ISSUED BY OMAHA WFO WILL CHANGE TO OMAAFDOAX. THE WMO CODE WILL REMAIN
HAZARDOUS WEATHER OUTLOOK NATIONAL WEATHER SERVICE OMAHA/VALLEY NE 1204 PM CDT THU MAY 27 2004 IAZ043-055-056-069-NEZ011-012-015>018-030>034-042>045-050>053-065- 066-078-088-089-272300- ANTELOPE-BOONE-BURT-BUTLER-CEDAR-COLFAX-CUMING-DODGE-DOUGLAS-GAGE- HARRISON IA-JEFFERSON-KNOX-LANCASTER-MADISON-MONONA IA-PIERCE-PLATTE- POTTAWATTAMIE IA-SALINE-SARPY-SAUNDERS-SEWARD-SHELBY IA-STANTON- THURSTON-WASHINGTON-WAYNE- 1204 PM CDT THU MAY 27 2004 THIS HAZARDOUS WEATHER OUTLOOK IS FOR PARTS OF EASTERN NEBRASKA AND WESTERN IOWA. .DAY ONE...THIS AFTERNOON AND TONIGHT ISOLATED THUNDERSTORMS WILL BE POSSIBLE ACROSS NORTHEAST NEBRASKA LATE THIS AFTERNOON AND TONIGHT...HOWEVER...SEVERE STORMS ARE NOT ANTICIPATED. .DAYS TWO THROUGH SEVEN...FRIDAY THROUGH WEDNESDAY THERE IS A CHANCE FOR MORE THUNDERSTORMS FRIDAY THROUGH MONDAY. SEVERE THUNDERSTORMS WILL BE POSSIBLE SATURDAY AFTERNOON AND SATURDAY NIGHT. THESE STORMS MAY PRODUCE LARGE HAIL...DAMAGING WINDS...HEAVY RAIN...AND ISOLATED TORNADOES. THE STORMS SATURDAY WILL FORM IN THE VICINITY OF A SURFACE FRONT. LOW LEVEL MOISTURE...VERY HIGH INSTABILITY...AND LOW LEVEL VERTICAL WIND SHEAR IN THE VICINITY OF THIS FRONT WILL BE FAVORABLE FOR SUPERCELLS. THE ORIENTATION OF THE FRONT WITH THE UPPER LEVEL WINDS WILL FAVOR HEAVY RAIN...RESULTING FROM STORMS REPEATEDLY MOVING OVER THE SAME AREA. .SPOTTER INFORMATION STATEMENT... STORM SPOTTER ACTIVATION SHOULD NOT BE NEEDED TODAY OR TONIGHT. IAZ079-080-090-091-NEZ067-068-090>093-272300- CASS-FREMONT IA-JOHNSON-MILLS IA-MONTGOMERY IA-NEMAHA-OTOE-PAGE IA- PAWNEE-RICHARDSON- 1204 PM CDT THU MAY 27 2004 THIS HAZARDOUS WEATHER OUTLOOK IS FOR PARTS OF SOUTHEASTERN NEBRASKA AND FAR SOUTHWESTERN IOWA. .DAY ONE...THIS AFTERNOON AND TONIGHT SCATTERED THUNDERSTORMS THIS AFTERNOON MAY PRODUCE LARGE HAIL OR DAMAGING WINDS...MAINLY IN THE SOUTHWEST CORNER OF IOWA BEFORE 4 PM. .DAYS TWO THROUGH SEVEN...FRIDAY THROUGH WEDNESDAY THERE IS A CHANCE FOR MORE THUNDERSTORMS FRIDAY THROUGH MONDAY. SEVERE THUNDERSTORMS WILL BE POSSIBLE SATURDAY AFTERNOON AND SATURDAY NIGHT. THESE STORMS MAY PRODUCE LARGE HAIL...DAMAGING WINDS...HEAVY RAIN...AND ISOLATED TORNADOES. THE STORMS SATURDAY WILL FORM IN THE VICINITY OF A SURFACE FRONT. LOW LEVEL MOISTURE...VERY HIGH INSTABILITY...AND LOW LEVEL VERTICAL WIND SHEAR IN THE VICINITY OF THIS FRONT WILL BE FAVORABLE FOR SUPERCELLS. THE ORIENTATION OF THE FRONT WITH THE UPPER LEVEL WINDS WILL FAVOR HEAVY RAIN...RESULTING FROM STORMS REPEATEDLY MOVING OVER THE SAME AREA. .SPOTTER INFORMATION STATEMENT... POLLACK
The Omaha radar (KOAX), 104 km away, was scanning. The volume nearest the first event began at 17:18 UTC.
1 thunderstorm wind. Local standard time, as filed.
Thunderstorm wind gusts estimated at 70 mph caused roof damage to a local Walmart and several other buildings in town, and also downed a few trees and power lines.
After NWS Directive 10-1605, the rules offices file Storm Data by.
Every storm in Iowa in 2004Every state in 2004This day in weather historyWarnings in Iowa, May 2004
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: 5396099.