Alert archive / Iowa / Flash Flood Warnings in 2004
Flash Flood Warning 46, NWS Des Moines, IA
NWS Des Moines, IA issued this flash flood warning at Aug 16, 2004, 9:04 PM CDT for Hardin County, Iowa. It was in force for 5 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
- Aug 16, 2004, 9:04 PM CDT (02:04 UTC)
- Expired
- Aug 17, 2004, 1:45 AM CDT
- In force
- 5 hr
- Issued by
- NWS Des Moines, IA
- Area
- Counties, with a storm outline in the text
County Hardin County, IA
The radar
The Des Moines radar (KDMX), 99 km from the middle of the area, began a volume at 02:05 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 00:00Z, 2.1 hours before the alert went out and 240 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
- 106 J/kg
- Mixed-layer CIN
- -82 J/kg
- Mixed-layer LCL
- 995 m above ground
- 0-6 km bulk shear
- 37 kt
- 0-1 km storm-relative helicity
- 186 m²/s²
- 0-3 km storm-relative helicity
- 352 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.3
The text
As transmitted, in the capitals the NWS used until 2016.
000 WGUS53 KDMX 170208 FFWDMX IAC083-170645- BULLETIN - EAS ACTIVATION REQUESTED FLASH FLOOD WARNING NATIONAL WEATHER SERVICE DES MOINES IA 904 PM CDT MON AUG 16 2004 THE NATIONAL WEATHER SERVICE IN DES MOINES HAS ISSUED A * FLASH FLOOD WARNING FOR... NORTHEASTERN HARDIN COUNTY IN CENTRAL IOWA * UNTIL 145 AM CDT * AT 901 PM CDT...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 3 INCHES PER HOUR. THIS WILL PRODUCE FLASH FLOODING IN THE ACKLEY AREA. OTHER WARNING LOCATIONS INCLUDE... ACKLEY AMATEUR RADIO SPOTTER REPORTED FLASH FLOODING ALONG THE GRUNDY AND BUTLER COUNTY LINE ALONG OLD HIGHWAY 20. ADDITIONAL THUNDERSTORMS MOVING THROUGH THE AREA WILL PRODUCE VERY HEAVY RAIN THROUGH 1030 PM. A FLASH FLOOD WARNING REMAINS IN EFFECT FOR SOUTHEAST FRANKLIN...SOUTHWEST BUTLER AND NORTHWEST GRUNDY UNTIL 145 AM. 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 4256 9320 4246 9321 4244 9305 4255 9304 $$ JOHNSON
4 follow-up statements
000 WGUS73 KDMX 170339 CCA FFSDMX IAC023-069-075-083-170645- FLASH FLOOD STATEMENT NATIONAL WEATHER SERVICE DES MOINES IA 1036 PM CDT MON AUG 16 2004 ...A FLASH FLOOD STATEMENT WAS ISSUED WITH THE WRONG COUNTY CODES IN EFFECT...THIS STATEMENT CORRECTS THE PREVIOUS STATEMENT... ...A FLASH FLOOD WARNING CONTINUES FOR SOUTHWESTERN BUTLER... SOUTHEASTERN FRANKLIN...NORTHEASTERN HARDIN AND NORTHWESTERN GRUNDY COUNTIES UNTIL 130 AM CDT... AMATEUR RADIO SPOTTER REPORTED FLASH FLOODING ALONG THE GRUNDY AND BUTLER COUNTY LINE ALONG OLD HIGHWAY 20. IN ADDITION...AT 930 PM...LAW ENFORCEMENT REPORTED A BLACK TOP ROAD UNDERWATER AND SEVERAL GRAVEL ROADS WITH WATER FLOWING OVER THEM 6 MILES NORTH OF WELLSBURG. PRECIPITATION ESTIMATES INDICATE 3 TO 4 INCHES OF RAINFALL HAVE FALLEN IN THESE AREAS. ADDITIONAL THUNDERSTORMS MOVING THROUGH THE AREA WILL CONTINUE TO PRODUCE VERY HEAVY RAIN THROUGH 1030 PM. THUNDERSTORMS ARE CONTINUOUSLY REDEVELOPING OVER THE WARNING AREA...RESULTING IN EXCESSIVE RAINFALL. RAINFALL RATES WILL AVERAGE 1 TO 3 INCHES PER HOUR. THIS WILL CONTINUE TO PRODUCE FLASH FLOODING ALONG THE BEAVER CREEK. FLASH FLOODS OCCUR QUICKLY...MOVE TO HIGHER GROUND. AVOID WATER COVERED ROADS...THE ROAD MAY BE WASHED OUT. LESS THAN ONE FOOT OF FAST FLOWING WATER CAN SWEEP AN AUTOMOBILE OFF THE ROAD. LAT...LON 4241 9316 4241 9284 4262 9286 4261 9318 $$ RUSSELL
000 WGUS73 KDMX 170436 FFSDMX IAC023-069-075-083-170645- FLASH FLOOD STATEMENT NATIONAL WEATHER SERVICE DES MOINES IA 1125 PM CDT MON AUG 16 2004 ...A FLASH FLOOD WARNING CONTINUES FOR SOUTHWESTERN BUTLER... SOUTHEASTERN FRANKLIN...NORTHEASTERN HARDIN AND NORTHWESTERN GRUNDY COUNTIES UNTIL 145 AM CDT... AT 1125 PM CDT... FLASH FLOODING WAS LIKELY STILL OCCURING ALONG THE BEAVER CREEK 21 MILES WEST OF ACKLEY...OR ABOUT 37 MILES EAST OF FORT DODGE. ANOTHER THUNDERSTORM WILL TRACK OVER THE AREA AFFECTING THE ACKLEY AREA AND BEAVER CREEK...BRINGING YET ANOTHER HALF TO THREE QUARTERS OF AN INCH OF PRECIPITATION BY AROUND MIDNIGHT. EARLIER REPORTS INCLUDED AMATEUR RADIO SPOTTER REPORTED FLASH FLOODING ALONG THE GRUNDY AND BUTLER COUNTY LINE ALONG OLD HIGHWAY 20. IN ADDITION...AT 930 PM...LAW ENFORCEMENT REPORTED A BLACK TOP ROAD UNDERWATER AND SEVERAL GRAVEL ROADS WITH WATER FLOWING OVER THEM 6 MILES NORTH OF WELLSBURG. THUNDERSTORMS HAVE DIMINISHED SIGNIFICANTLY OVER THE AREA...HOWEVER RATES OF 2 TO 3 INCHES PER HOUR AND ESTIMATED RAINFALL OF 3 TO 4 INCHES COULD MAKE FLOODING IMPACTS CONTINUE PAST MIDNIGHT. 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 4241 9316 4241 9284 4262 9286 4261 9318 $$ RUSSELL
000 WGUS73 KDMX 170531 FFSDMX IAC023-069-075-083-170645- FLASH FLOOD STATEMENT NATIONAL WEATHER SERVICE DES MOINES IA 1230 AM CDT TUE AUG 17 2004 ...A FLASH FLOOD WARNING CONTINUES FOR SOUTHWESTERN BUTLER... SOUTHEASTERN FRANKLIN...NORTHEASTERN HARDIN AND NORTHWESTERN GRUNDY COUNTIES UNTIL 145 AM CDT... AT 1125 PM CDT...FLASH FLOODING WAS LIKELY STILL OCCURING BUT DIMINISHING ALONG THE BEAVER CREEK 21 MILES WEST OF ACKLEY...OR ABOUT 37 MILES EAST OF FORT DODGE. THUNDERSTORMS HAVE DIMINISHED OVER THE AREA...HOWEVER...ESTIMATED RAINFALL OF 3 TO 4 INCHES COULD MAKE FLOODING IMPACTS CONTINUE PAST MIDNIGHT. NUMEROUS REPORTS OF WATER OVER ROADWAYS WERE RECEIVED EARLIER IN THE EVENING...BUT NO NEW FLOODING REPORTS HAVE BEEN RECEIVED. ANY FLOODING IS EXPECTED TO RECEDE THROUGH 2 AM. AVOID WATER COVERED ROADS...THE ROAD MAY BE WASHED OUT. LESS THAN ONE FOOT OF FAST FLOWING WATER CAN SWEEP AN AUTOMOBILE OFF THE ROAD. LAT...LON 4241 9316 4241 9284 4262 9286 4261 9318 $$ RUSSELL
000 WGUS73 KDMX 170658 FFSDMX IAC023-069-075-083-170715- FLASH FLOOD STATEMENT NATIONAL WEATHER SERVICE DES MOINES IA 150 AM CDT TUE AUG 17 2004 ...FLASH FLOOD WARNING HAS BEEN ALLOWED TO EXPIRE FOR SOUTHWESTERN BUTLER...SOUTHEASTERN FRANKLIN...NORTHEASTERN HARDIN AND NORTHWESTERN GRUNDY COUNTIES... RUNOFF FROM HEAVY RAINFALL MONDAY EVENING IN DITCHES...LOW SPOTS...AND SMALL CREEKS SHOULD CONTINUE TO DIMINISH. LARGER RIVERS IN THE AREA MAY CONTINUE TO SEE SOME LONGER TERM RISES THROUGH TUESDAY. ALTHOUGH SOME ISOLATED THUNDERSTORMS MAY MOVE ACROSS SOUTHWEST HARDEN COUNTY...NO ADDITIONAL WIDESPREAD HEAVY RAINFALL IS EXPECTED EARLY THIS MORNING. THE FLASH FLOOD WARNING FOR THE AREA HAS BEEN ALLOWED TO EXPIRE. LAT...LON 4241 9316 4241 9284 4262 9286 4261 9318 $$ JAW
The office that day
Everything else NWS Des Moines, IA issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Aug 16, 7:05 PM CDT | Tornado Warning | DMX | Franklin, Hardin | 25 min |
| Aug 16, 7:17 PM CDT | Tornado Warning | DMX | Grundy | 43 min |
| Aug 16, 7:19 PM CDT | Severe Thunderstorm Warning | DMX | Butler | 56 min |
| Aug 16, 7:29 PM CDT | Tornado Warning | DMX | Hardin | 16 min |
| Aug 16, 7:54 PM CDT | Severe Thunderstorm Warning | DMX | Wright | 51 min |
| Aug 16, 8:01 PM CDT | Tornado Warning | DMX | Grundy | 29 min |
| Aug 16, 8:32 PM CDT | Severe Thunderstorm Warning | DMX | Grundy | 43 min |
| Aug 16, 8:45 PM CDT | Flash Flood Warning | DMX | Butler, Franklin, Grundy | 5 hr |
| Aug 16, 8:50 PM CDT | Severe Thunderstorm Warning | DMX | Hardin | 55 min |
| Aug 16, 8:58 PM CDT | Severe Thunderstorm Warning | DMX | Wright | 47 min |
| Aug 16, 9:05 PM CDT | Severe Thunderstorm Warning | DMX | Franklin | 40 min |
| Aug 16, 9:25 PM CDT | Severe Thunderstorm Warning | DMX | Grundy | 50 min |
| Aug 16, 10:16 PM CDT | Severe Thunderstorm Warning | DMX | Marshall | 44 min |
| Aug 16, 11:41 PM CDT | Severe Thunderstorm Warning | DMX | Marshall | 49 min |
| Aug 16, 11:52 PM CDT | Severe Thunderstorm Warning | DMX | Jasper | 53 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.