Alert archive / Iowa / Flash Flood Warnings in 2004
Flash Flood Warning 29, NWS Des Moines, IA
NWS Des Moines, IA issued this flash flood warning at May 27, 2004, 11:32 AM CDT for Decatur County, Iowa. It was in force for 3 hr. No storm report in the archive falls inside the area while it was in force.
The area
The outline as issued.
The facts
- Issued
- May 27, 2004, 11:32 AM CDT (16:32 UTC)
- Expired
- May 27, 2004, 2:30 PM CDT
- In force
- 3 hr
- Issued by
- NWS Des Moines, IA
- Area
- Counties, with a storm outline in the text
County Decatur County, IA
The radar
The Des Moines radar (KDMX), 107 km from the middle of the area, began a volume at 16:35 UTC, the scan nearest the moment this went out.
Open the radar archive at this moment
The archived warnings, watches and discussions in force at that minute are drawn over the scan, this one among them.
The nearest sounding before it
Omaha, NE (KOAX), launched 12:00Z, 4.5 hours before the alert went out and 228 km from the middle of its area. This is the routine balloon launch nearest before it, the air the forecaster had in hand, not a measurement taken for the alert.
- Mixed-layer CAPE
- 97 J/kg
- Mixed-layer CIN
- -239 J/kg
- Mixed-layer LCL
- 906 m above ground
- 0-6 km bulk shear
- 51 kt
- 0-1 km storm-relative helicity
- -37 m²/s²
- 0-3 km storm-relative helicity
- 60 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.1
The text
As transmitted, in the capitals the NWS used until 2016.
000 WGUS53 KDMX 271632 FFWDMX IAC053-271930- BULLETIN - EAS ACTIVATION REQUESTED FLASH FLOOD WARNING NATIONAL WEATHER SERVICE DES MOINES IA 1132 AM CDT THU MAY 27 2004 THE NATIONAL WEATHER SERVICE IN DES MOINES HAS ISSUED A * FLASH FLOOD WARNING FOR... DECATUR COUNTY IN SOUTH CENTRAL IOWA * UNTIL 230 PM * AT 1130 AM...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED THUNDERSTORMS WITH FLASH FLOOD PRODUCING RAINS IN THE WARNING AREA. * THE GROUND IS ALREADY SATURATED BY RAINFALL...AND ADDITIONAL RAIN WILL PRODUCE SIGNIFICANT RUNOFF INTO SWOLLEN WATERWAYS. THUNDERSTORMS ARE EXPECTED TO PRODUCE RAINFALL RATES OF 1 TO 2 INCHES PER HOUR. THIS WILL PRODUCE FLASH FLOODING ALONG ELK CREEK AND TRIBUTARIES AND CREEKS OF THE THOMPSON RIVER. OTHER WARNING LOCATIONS INCLUDE... DAVIS CITY...DECATUR CITY...GARDEN GROVE...GRAND RIVER...LAMONI... LAMONI MUNICIPAL AIRPORT...LE ROY...LEON...VAN WERT AND WELDON FLASH FLOODS OCCUR QUICKLY...MOVE TO HIGHER GROUND. AVOID WATER COVERED ROADS...THE ROAD MAY BE WASHED OUT. LESS THAN ONE FOOT OF FAST FLOWING WATER CAN SWEEP AN AUTOMOBILE OFF THE ROAD. LAT...LON 4089 9358 4059 9357 4059 9402 4089 9401 $$ KULA
3 follow-up statements
000 WGUS73 KDMX 271727 FFSDMX IAC053-271930- FLASH FLOOD STATEMENT NATIONAL WEATHER SERVICE DES MOINES IA 1226 PM CDT THU MAY 27 2004 ...A FLASH FLOOD WARNING CONTINUES FOR DECATUR COUNTY UNTIL 230 PM... AT 1226 PM...NATIONAL WEATHER SERVICE DOPPLER RADAR CONTINUED TO INDICATE THUNDERSTORMS WITH FLASH FLOOD PRODUCING RAINS OVER DECATUR CITY...OR ABOUT 58 MILES SOUTH OF DES MOINES...MOVING EAST AT 40 MPH. THUNDERSTORMS WITH EXCESSIVE RAINFALL WILL BE... 7 MILES SOUTH OF GARDEN GROVE AROUND 1240 PM. THE GROUND IS ALREADY SATURATED BY RAINFALL IN THE WARNING AREA...AND ADDITIONAL RAIN WILL CONTINUE TO PRODUCE SIGNIFICANT RUNOFF INTO SWOLLEN WATERWAYS. THUNDERSTORMS ARE EXPECTED TO PRODUCE RAINFALL RATES OF 1 TO 2 INCH PER HOUR. THIS WILL PRODUCE FLASH FLOODING ALONG THE BRUSH AND ELK CREEKS...AS WELL AS MOST OTHER SMALL CREEKS AFFECTED BY THESE STORMS. FLASH FLOODS OCCUR QUICKLY...MOVE TO HIGHER GROUND. AVOID WATER COVERED ROADS...THE ROAD MAY BE WASHED OUT. LESS THAN ONE FOOT OF FAST FLOWING WATER CAN SWEEP AN AUTOMOBILE OFF THE ROAD. LAT...LON 4088 9401 4059 9401 4059 9358 4088 9361 $$ KULA
000 WGUS73 KDMX 271832 FFSDMX IAC053-271930- FLASH FLOOD STATEMENT NATIONAL WEATHER SERVICE DES MOINES IA 131 PM CDT THU MAY 27 2004 ...A FLASH FLOOD WARNING CONTINUES FOR DECATUR COUNTY UNTIL 230 PM... AT 131 PM...NATIONAL WEATHER SERVICE DOPPLER RADAR DETECTED A THUNDERSTORM WITH FLASH FLOOD PRODUCING RAINS 12 MILES WEST OF GRAND RIVER...OR ABOUT 61 MILES SOUTHWEST OF DES MOINES...MOVING SOUTHEAST AT 35 MPH. THIS THUNDERSTORM WITH EXCESSIVE RAINFALL WILL BE... 6 MILES SOUTHWEST OF GRAND RIVER AROUND 150 PM... NEAR DECATUR CITY AROUND 200 PM AND NEAR DAVIS CITY AROUND 210 PM. THE GROUND IS ALREADY SATURATED BY RAINFALL IN THE WARNING AREA...AND ADDITIONAL RAIN WILL CONTINUE TO PRODUCE SIGNIFICANT RUNOFF INTO SWOLLEN WATERWAYS. THUNDERSTORMS ARE EXPECTED TO PRODUCE RAINFALL RATES OF 1 INCH PER HOUR. LOW LYING GRAVEL ROADS ARE SUSCEPTIBLE TO RUNOFF AND FLASH FLOODING. FLASH FLOODS OCCUR QUICKLY...MOVE TO HIGHER GROUND. AVOID WATER COVERED ROADS...THE ROAD MAY BE WASHED OUT. LESS THAN ONE FOOT OF FAST FLOWING WATER CAN SWEEP AN AUTOMOBILE OFF THE ROAD. LAT...LON 4089 9400 4060 9401 4059 9357 4089 9358 $$ KULA
000 WGUS73 KDMX 271933 FFSDMX IAC053-272000- FLASH FLOOD STATEMENT NATIONAL WEATHER SERVICE DES MOINES IA 233 PM CDT THU MAY 27 2004 ...THE FLASH FLOOD WARNING WHICH WAS IN EFFECT FOR DECATUR COUNTY UNTIL 230 PM HAS BEEN ALLOWED TO EXPIRE... THE STORMS HAVE WEAKENED AND ARE NO LONGER CAPABLE OF INTENSE RAINS TO PRODUCE FLASH FLOODS...THUS THE WARNING HAS BEEN ALLOWED TO EXPIRE. LAT...LON 4089 9400 4059 9401 4060 9359 4087 9357 $$ KULA
The office that day
Everything else NWS Des Moines, IA issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| May 27, 11:03 AM CDT | Severe Thunderstorm Warning | DMX | Ringgold | 42 min |
| May 27, 11:07 AM CDT | Severe Thunderstorm Warning | DMX | Taylor | 38 min |
| May 27, 11:20 AM CDT | Flash Flood Warning | DMX | Ringgold, Taylor | 3 hr |
| May 27, 11:23 AM CDT | Severe Thunderstorm Warning | DMX | Decatur | 52 min |
| May 27, 11:45 AM CDT | Severe Thunderstorm Warning | DMX | Ringgold | 45 min |
| May 27, 12:00 PM CDT | Severe Thunderstorm Warning | DMX | Wayne | 45 min |
| May 27, 12:30 PM CDT | Severe Thunderstorm Warning | DMX | Decatur | 45 min |
| May 27, 12:38 PM CDT | Flash Flood Warning | DMX | Adams | 3 hr |
| May 27, 12:41 PM CDT | Tornado Warning | DMX | Appanoose, Wayne | 49 min |
| May 27, 1:01 PM CDT | Severe Thunderstorm Warning | DMX | Wayne | 44 min |
| May 27, 1:05 PM CDT | Severe Thunderstorm Warning | DMX | Taylor | 40 min |
Nearby
Flash Flood Warnings in Iowa, 2004Every flash flood warning in 2004
Sources
The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.