Alert archive / Iowa / Flash Flood Warnings in 2003
Flash Flood Warning 1, NWS Des Moines, IA
NWS Des Moines, IA issued this flash flood warning at Apr 30, 2003, 6:50 PM CDT for 4 counties in Iowa. It was in force for 6 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
- Apr 30, 2003, 6:50 PM CDT (23:50 UTC)
- Expired
- May 1, 2003, 12:45 AM CDT
- In force
- 6 hr
- Issued by
- NWS Des Moines, IA
- Area
- Counties, with a storm outline in the text
Counties Lucas County, IA, Mahaska County, IA, Marion County, IA, Monroe County, IA
The radar
The Des Moines radar (KDMX), 86 km from the middle of the area, began a volume at 23:52 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
Davenport, (KDVN), launched 12:00Z, 11.8 hours before the alert went out and 208 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
- 0 J/kg
- Mixed-layer CIN
- No buoyant parcel
- Mixed-layer LCL
- 849 m above ground
- 0-6 km bulk shear
- 53 kt
- 0-1 km storm-relative helicity
- 478 m²/s²
- 0-3 km storm-relative helicity
- 567 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted, in the capitals the NWS used until 2016.
000
WGUS53 KDMX 302352
FFWDMX
IAC117-123-125-135-010545-
BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE DES MOINES IA
650 PM CDT WED APR 30 2003
THE NATIONAL WEATHER SERVICE IN DES MOINES HAS ISSUED A
* FLASH FLOOD WARNING FOR...
LUCAS COUNTY IN SOUTH CENTRAL IOWA
MAHASKA COUNTY IN SOUTH CENTRAL IOWA
MARION COUNTY IN SOUTH CENTRAL IOWA
MONROE COUNTY IN SOUTH CENTRAL IOWA
* UNTIL 1245 AM
* AT 647 PM...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED
THUNDERSTORMS WITH FLASH FLOOD PRODUCING RAINS IN THE WARNING AREA.
* THUNDERSTORMS ARE CONTINUOUSLY REDEVELOPING...RESULTING IN
EXCESSIVE RAINFALL. RAINFALL RATES WILL AVERAGE 1 TO 1.5 INCHES PER
HOUR. THIS WILL PRODUCE FLASH FLOODING ALONG THE SMALL STREAMS AND
CREEKS IN THE COUNTIES.
OTHER WARNING LOCATIONS INCLUDE...
ALBIA...ALBIA MUNICIPAL AIRPORT...BARNES CITY...BEACON...BUSSEY...
CHARITON...CHARITON MUNICIPAL AIRPORT...DERBY...FREMONT...HAMILTON...
HARVEY...KEOMAH VILLAGE...KNOXVILLE...KNOXVILLE MUNICIPAL AIRPORT...
LEIGHTON...LOVILIA...LUCAS...MARYSVILLE...MELCHER-DALLAS...MELROSE...
NEW SHARON...OSKALOOSA...OSKALOOSA MUNICIPAL AIRPORT...PELLA...PELLA
MUNICIPAL AIRPORT...PLEASANTVILLE...ROSE HILL...RUSSELL...SWAN...
UNIVERSITY PARK AND WILLIAMSON
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 4152 9243 4117 9243 4118 9267 4092 9269
4092 9357 4115 9355 4117 9332 4151 9333
FORSTER
$$4 follow-up statements
000
WGUS73 KDMX 010029
FFSDMX
IAC117-123-125-135-010130-
FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE DES MOINES IA
728 PM CDT WED APR 30 2003
...A FLASH FLOOD WARNING CONTINUES FOR MAHASKA...MARION...LUCAS AND
MONROE COUNTIES UNTIL 1245 AM...
AT 728 PM...NATIONAL WEATHER SERVICE DOPPLER RADAR CONTINUED TO
INDICATE THUNDERSTORMS WITH FLASH FLOOD PRODUCING RAINS OVER THE
FOUR COUNTY AREA.
THE GROUND IS ALREADY SATURATED BY RAINFALL IN THE WARNING AREA...AND
ADDITIONAL RAIN WILL CONTINUE TO PRODUCE SIGNIFICANT RUNOFF INTO
SWOLLEN WATERWAYS. THUNDERSTORMS ARE EXPECTED TO PRODUCE RAINFALL
RATES OF ** TO ** INCHES PER HOUR. THIS WILL PRODUCE FLASH FLOODING
ALONG THE **STREAMS**.
FLASH FLOODS OCCUR QUICKLY...MOVE TO HIGHER GROUND. AVOID WATER
COVERED ROADS...THE ROAD MAY BE WASHED OUT. LESS THAN ONE FOOT OF
FAST FLOWING WATER CAN SWEEP AN AUTOMOBILE OFF THE ROAD.
LAT...LON 4152 9243 4117 9243 4118 9267 4092 9269
4092 9357 4115 9355 4117 9332 4151 9333
FORSTER
$$000
WGUS73 KDMX 010119
FFSDMX
IAC117-123-125-135-010230-
FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE DES MOINES IA
820 PM CDT WED APR 30 2003
...A FLASH FLOOD WARNING CONTINUES FOR MAHASKA...MARION...LUCAS AND
MONROE COUNTIES UNTIL 1245 AM...
AT 820 PM...NATIONAL WEATHER SERVICE DOPPLER RADAR CONTINUED TO
INDICATE THUNDERSTORMS WITH FLASH FLOOD PRODUCING RAINS OVER THE
FOUR COUNTY AREA OR EXPECTED TO MOVE INTO THE AREA BEFORE 10 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 1/2 INCH TO 1 INCH PER HOUR. THIS WILL PRODUCE FLASH
FLOODING ALONG THE SMALLER STREAMS AND CREEKS IN THE FOUR COUNTY
AREA.
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 4152 9243 4117 9243 4118 9267 4092 9269
4092 9357 4115 9355 4117 9332 4151 9333
FORSTER
$$000
WGUS73 KDMX 010220
FFSDMX
IAC117-123-125-135-010330-
FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE DES MOINES IA
920 PM CDT WED APR 30 2003
...A FLASH FLOOD WARNING CONTINUES FOR MAHASKA...MARION...LUCAS AND
MONROE COUNTIES UNTIL 1245 AM...
AT 920 PM...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED
THUNDERSTORMS WITH FLASH FLOOD PRODUCING RAINS MOVING INTO THE FOUR
COUNTY AREA.
THE GROUND IS ALREADY SATURATED BY RAINFALL IN THE WARNING AREA...AND
ADDITIONAL RAIN WILL CONTINUE TO PRODUCE SIGNIFICANT RUNOFF INTO
SWOLLEN WATERWAYS. THUNDERSTORMS ARE EXPECTED TO PRODUCE RAINFALL
RATES OF 1/2 INCH TO 1 INCH PER HOUR. THIS WILL PRODUCE FLASH
FLOODING ALONG THE SMALLER STREAMS AND CREEKS IN THE FOUR COUNTY
AREA.
FLASH FLOODS OCCUR QUICKLY...MOVE TO HIGHER GROUND. AVOID
WATER COVERED ROADS...THE ROAD MAY BE WASHED OUT. LESS THAN ONE FOOT
OF FAST FLOWING WATER CAN SWEEP AN AUTOMOBILE OFF THE ROAD.
LAT...LON 4152 9243 4117 9243 4118 9267 4092 9269
4092 9357 4115 9355 4117 9332 4151 9333
FORSTER
$$000
WGUS73 KDMX 010305
FFSDMX
IAC117-123-125-135-010400-
FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE DES MOINES IA
1004 PM CDT WED APR 30 2003
...THE FLASH FLOOD WARNING WHICH WAS IN EFFECT FOR MAHASKA...
MARION...LUCAS AND MONROE COUNTIES UNTIL 1100 PM HAS BEEN
CANCELLED...
STORMS HAVE MOVED OUT OF THE WARNED AREA...THUS THE WARNING HAS BEEN
CANCELLED.
LAT...LON 4152 9243 4117 9243 4118 9267 4092 9269
4092 9357 4115 9355 4117 9332 4151 9333
$$
FORSTERThe office that day
Everything else NWS Des Moines, IA issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Apr 29, 9:34 PM CDT | Severe Thunderstorm Warning | DMX | Crawford | 26 min |
| Apr 29, 9:58 PM CDT | Severe Thunderstorm Warning | DMX | Audubon, Carroll | 47 min |
| Apr 30, 12:01 AM CDT | Severe Thunderstorm Warning | DMX | Polk | 29 min |
| Apr 30, 3:06 AM CDT | Severe Thunderstorm Warning | DMX | Adair | 24 min |
| Apr 30, 6:02 AM CDT | Severe Thunderstorm Warning | DMX | Jasper | 28 min |
| Apr 30, 7:14 AM CDT | Severe Thunderstorm Warning | DMX | Dallas, Polk | 31 min |
| Apr 30, 7:45 AM CDT | Severe Thunderstorm Warning | DMX | Madison, Warren | 30 min |
| Apr 30, 7:47 AM CDT | Severe Thunderstorm Warning | DMX | Madison, Warren | 28 min |
| Apr 30, 7:49 AM CDT | Severe Thunderstorm Warning | DMX | Polk | 26 min |
| Apr 30, 4:58 PM CDT | Severe Thunderstorm Warning | DMX | Wapello | 32 min |
| Apr 30, 5:27 PM CDT | Severe Thunderstorm Warning | DMX | Ringgold | 33 min |
| Apr 30, 5:38 PM CDT | Severe Thunderstorm Warning | DMX | Monroe | 37 min |
| Apr 30, 5:44 PM CDT | Severe Thunderstorm Warning | DMX | Lucas | 46 min |
| Apr 30, 5:55 PM CDT | Tornado Warning | DMX | Monroe | 50 min |
| Apr 30, 5:57 PM CDT | Severe Thunderstorm Warning | DMX | Mahaska, Marion | 63 min |
| Apr 30, 5:59 PM CDT | Severe Thunderstorm Warning | DMX | Decatur | 31 min |
| Apr 30, 6:10 PM CDT | Severe Thunderstorm Warning | DMX | Wayne | 35 min |
| Apr 30, 6:22 PM CDT | Tornado Warning | DMX | Wapello | 53 min |
| Apr 30, 6:23 PM CDT | Severe Thunderstorm Warning | DMX | Ringgold | 52 min |
| Apr 30, 6:30 PM CDT | Severe Thunderstorm Warning | DMX | Lucas | 45 min |
| Apr 30, 6:40 PM CDT | Severe Thunderstorm Warning | DMX | Monroe | 65 min |
| Apr 30, 6:44 PM CDT | Severe Thunderstorm Warning | DMX | Wayne | 46 min |
| Apr 30, 6:50 PM CDT | Severe Thunderstorm Warning | DMX | Appanoose | 55 min |
| Apr 30, 6:51 PM CDT | Severe Thunderstorm Warning | DMX | Decatur | 54 min |
| Apr 30, 6:54 PM CDT | Severe Thunderstorm Warning | DMX | Cass | 36 min |
| Apr 30, 6:57 PM CDT | Tornado Warning | DMX | Decatur, Ringgold | 48 min |
Nearby
Flash Flood Warnings in Iowa, 2003Every flash flood warning in 2003
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.