Alert archive / Iowa / Flash Flood Warnings in 2007
Flash Flood Warning 49, NWS Des Moines, IA
NWS Des Moines, IA issued this flash flood warning at Aug 8, 2007, 8:54 PM CDT for Mahaska County, Iowa. It took effect at Aug 8, 2007, 8:59 PM CDT. It was in force for 6 hr. 3 reports came from inside the area while it was in force.
The area
The counties it named, with what was reported inside it.
The facts
- Issued
- Aug 8, 2007, 8:54 PM CDT (01:54 UTC)
- In effect from
- Aug 8, 2007, 8:59 PM CDT
- Expired
- Aug 9, 2007, 3:00 AM CDT
- In force
- 6 hr
- Issued by
- NWS Des Moines, IA
- Area
- Whole counties
County Mahaska County, IA
The radar
The Des Moines radar (KDMX), 100 km from the middle of the area, began a volume at 01:56 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.
What was reported inside it
| Time | Report | Where | Remark |
|---|---|---|---|
| Aug 8, 9:01 PM CDT | FLASH FLOOD | Oskaloosa, IA | WATER FLOWING OVER ROAD...WAS IMPASSABLE AT THE 600 BLOCK OF GEORGE AVENUE WEST IN OSKALOOSA. |
| Aug 8, 11:10 PM CDT | FLASH FLOOD | 2 Nne New Sharon, IA | WATER FROM THE SOUTH SKUNK RIVER FLOWING OVER 110TH STREET. 2200 BLOCK. FROM MAHASKA COUNTY SHERIFF. |
| Aug 8, 11:10 PM CDT | FLASH FLOOD | 3 Nne Oskaloosa, IA | WATER FLOWING OUT OF FARM FIELD OVER MERINO ROAD. 2300 BLOCK. FROM MAHASKA COUNTY SHERIFF. |
Local storm reports filed while the alert was in force, from inside its polygon or its counties.
The nearest sounding before it
Davenport, (KDVN), launched 00:00Z, 1.9 hours before the alert went out and 181 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
- 194 J/kg
- Mixed-layer CIN
- -74 J/kg
- Mixed-layer LCL
- 1146 m above ground
- 0-6 km bulk shear
- 32 kt
- 0-1 km storm-relative helicity
- 79 m²/s²
- 0-3 km storm-relative helicity
- 158 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 1.2
The text
As transmitted, in the capitals the NWS used until 2016.
000 WGUS53 KDMX 090159 FFWDMX IAC123-090800- BULLETIN - EAS ACTIVATION REQUESTED FLASH FLOOD WARNING NATIONAL WEATHER SERVICE DES MOINES IA 854 PM CDT WED AUG 8 2007 THE NATIONAL WEATHER SERVICE IN DES MOINES HAS ISSUED A * FLASH FLOOD WARNING FOR... MAHASKA COUNTY IN SOUTH CENTRAL IOWA... * UNTIL 300 AM CDT THURSDAY * AT 852 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED FLASH FLOODING FROM A THUNDERSTORM OVER THE WARNED AREA. * LOCATIONS IN THE WARNING INCLUDE BUT ARE NOT LIMITED TO NEW SHARON AND OSKALOOSA. ADDITIONAL RAINFALL AMOUNTS OF ONE TO THREE INCHES MAY IMPACT MAHASKA COUNTY THROUGH AT LEAST MIDNIGHT AS SEVERAL ROUND OF THUNDERSTORMS PASS THROUGH SOUTHEAST IOWA. THESE HEAVY RAINS WILL BE IN ADDITION TO WHAT OCCURRED OVER THE PAST FEW DAYS...AS WELL AS AROUND TWO INCHES WHICH ALREADY FELL EARLIER THIS EVENING IN A SHORT PERIOD OF TIME. EXCESSIVE RUNOFF FROM HEAVY RAINFALL WILL CAUSE FLOODING OF SMALL CREEKS AND STREAMS...HIGHWAYS AND UNDERPASSES. ADDITIONALLY...COUNTRY ROADS AND FARMLANDS ALONG THE BANKS OF CREEKS...STREAMS AND OTHER LOW LYING AREAS ARE SUBJECT TO FLOODING. AT 854 PM...AN AMATEUR RADIO OPERATOR REPORTED TORRENTIAL RAINS JUST SOUTH OF OSKALOOSA. BE ESPECIALLY CAUTIOUS AT NIGHT WHEN IT IS HARDER TO RECOGNIZE THE DANGERS OF FLOODING. IF FLASH FLOODING IS OBSERVED ACT QUICKLY. MOVE UP TO HIGHER GROUND TO ESCAPE FLOOD WATERS. DO NOT STAY IN AREAS SUBJECT TO FLOODING WHEN WATER BEGINS RISING. LAT...LON 4149 9285 4150 9243 4116 9245 4117 9286 TIME...MOT...LOC 0154Z 180DEG 0KT 4133 9249 $$ SMALL
5 follow-up statements
000 WGUS73 KDMX 090259 FFSDMX FLASH FLOOD STATEMENT NATIONAL WEATHER SERVICE DES MOINES IA 956 PM CDT WED AUG 8 2007 IAC123-090800- MAHASKA IA- 956 PM CDT WED AUG 8 2007 ...A FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 300 AM CDT FOR MAHASKA COUNTY... AT 951 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR CONTINUED TO INDICATE MODERATE TO HEAVY RAINS OVER MAHASKA COUNTY. RAINFALL AMOUNTS OF ONE TO THREE INCHES OF RAIN HAVE LIKELY FALLEN OVER THE COUNTY SINCE LATE THIS AFTERNOON...INCLUDING INSTANCES WHERE ONE TO TWO INCHES OF THAT RAIN FELL IN AN HOUR OR LESS. ADDITIONAL MODERATE RAIN WITH RAINFALL RATES UP TO A HALF INCH PER HOUR WILL CONTINUE UNTIL DIMINISHING BY MIDNIGHT. AT 901 PM...THE MAHASKA COUNTY SHERIFF REPORTED FLOODING AND WATER FLOWING OVER THE ROAD IN THE 600 BLOCK OF GEORGE AVENUE WEST IN OSKALOOSA...AND THE 1500 BLOCK OF THIRD AVENUE EAST WITH STALLED VEHICLES. EXCESSIVE RUNOFF FROM HEAVY RAINFALL WILL CAUSE FLOODING OF SMALL CREEKS AND STREAMS...HIGHWAYS AND UNDERPASSES. ADDITIONALLY...COUNTRY ROADS AND FARMLANDS ALONG THE BANKS OF CREEKS...STREAMS AND OTHER LOW LYING AREAS ARE SUBJECT TO FLOODING. BE ESPECIALLY CAUTIOUS AT NIGHT WHEN IT IS HARDER TO RECOGNIZE THE DANGERS OF FLOODING. IF FLASH FLOODING IS OBSERVED ACT QUICKLY. MOVE UP TO HIGHER GROUND TO ESCAPE FLOOD WATERS. DO NOT STAY IN AREAS SUBJECT TO FLOODING WHEN WATER BEGINS RISING. TO REPORT FLOODING...HAVE THE NEAREST LAW ENFORCEMENT AGENCY RELAY YOUR REPORT TO THE NATIONAL WEATHER SERVICE FORECAST OFFICE IN DES MOINES. LAT...LON 4149 9285 4150 9243 4116 9245 4117 9286 TIME...MOT...LOC 0253Z 180DEG 0KT 4133 9249 $$ SMALL
000 WGUS73 KDMX 090424 FFSDMX FLASH FLOOD STATEMENT NATIONAL WEATHER SERVICE DES MOINES IA 1124 PM CDT WED AUG 8 2007 IAC123-090800- MAHASKA IA- 1124 PM CDT WED AUG 8 2007 ...A FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 300 AM CDT FOR MAHASKA COUNTY... AT 1112 PM CDT...THE MAHASKA COUNTY SHERIFF CONTINUED TO REPORT FLOODING ACROSS THEIR COUNTY. WATER FROM THE SOUTH SKUNK RIVER WAS REPORTED FLOWING OVER THE 2200 BLOCK OF 110TH STREET...STANDING WATER WAS ON HIGHWAY 63 NORTH OF TOWN...AND WATER WAS OVER THE 2300 BLOCK OF MARINO ROAD FLOWING OUT OF A FARM FIELD. NUMEROUS VEHICLES WERE STRANDED IN FLOWING OR STANDING WATER. POWER OUTAGES WERE REPORTED AS WELL. PEOPLE WHO DEPEND ON SUMP PUMPS TO ELIMINATE EXCESS WATER SHOULD CHECK THEIR BASEMENT OR OTHER LOW AREAS FOR RISING WATER OR FLOODING. A SCHOOLNET RAIN GAGE IN OSKALOOSA HAS REPORTED 3.84 INCHES OF RAIN TODAY...MUCH OF IT FALLING SINCE 400 PM. THIS MAINLY OCCURRED DURING THREE INSTANCES WHERE ROUGHLY AN INCH OF RAIN FELL IN AN HOUR OR LESS. EXCESSIVE RUNOFF FROM HEAVY RAINFALL WILL CAUSE FLOODING OF SMALL CREEKS AND STREAMS...HIGHWAYS AND UNDERPASSES. ADDITIONALLY...COUNTRY ROADS AND FARMLANDS ALONG THE BANKS OF CREEKS...STREAMS AND OTHER LOW LYING AREAS ARE SUBJECT TO FLOODING. BE ESPECIALLY CAUTIOUS AT NIGHT WHEN IT IS HARDER TO RECOGNIZE THE DANGERS OF FLOODING. IF FLASH FLOODING IS OBSERVED ACT QUICKLY. MOVE UP TO HIGHER GROUND TO ESCAPE FLOOD WATERS. DO NOT STAY IN AREAS SUBJECT TO FLOODING WHEN WATER BEGINS RISING. LAT...LON 4149 9285 4150 9243 4116 9245 4117 9286 TIME...MOT...LOC 0413Z 180DEG 0KT 4133 9249 $$ SMALL
000 WGUS73 KDMX 090539 FFSDMX FLASH FLOOD STATEMENT NATIONAL WEATHER SERVICE DES MOINES IA 1239 AM CDT THU AUG 9 2007 IAC123-090800- MAHASKA IA- 1239 AM CDT THU AUG 9 2007 ...A FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 300 AM CDT FOR MAHASKA COUNTY... AT 1229 AM CDT...FLOODING CONTINUED ACROSS PORTIONS OF MAHASKA COUNTY. REPORTS FROM THE MAHASKA COUNTY SHERIFF AT AROUND 1100 PM INDICATED THAT WATER FROM THE NORTH SKUNK RIVER WAS REPORTED FLOWING OVER THE 2200 BLOCK OF 110TH STREET...STANDING WATER WAS ON HIGHWAY 63 NORTH OF TOWN...AND WATER WAS OVER THE 2300 BLOCK OF MERINO ROAD FLOWING OUT OF A FARM FIELD. NUMEROUS VEHICLES HAD BEEN STRANDED IN FLOWING OR STANDING WATER. RAIN GAGES HAVE REPORTED AROUND FOUR INCHES OF RAIN IN THE FAR EASTERN PORTION OF THE COUNTY EAST OF TRACY...AND 3.75 INCHES IN OSKALOOSA. NATIONAL WEATHER SERVICE DOPPLER RADAR ESTIMATES INDICATED THAT UP TO FIVE INCHES OF RAIN MAY HAVE FALLEN IN OTHER LOCATIONS. EXCESSIVE RUNOFF FROM HEAVY RAINFALL WILL CAUSE FLOODING OF SMALL CREEKS AND STREAMS...HIGHWAYS AND UNDERPASSES. ADDITIONALLY...COUNTRY ROADS AND FARMLANDS ALONG THE BANKS OF CREEKS...STREAMS AND OTHER LOW LYING AREAS ARE SUBJECT TO FLOODING. BE ESPECIALLY CAUTIOUS AT NIGHT WHEN IT IS HARDER TO RECOGNIZE THE DANGERS OF FLOODING. IF FLASH FLOODING IS OBSERVED ACT QUICKLY. MOVE UP TO HIGHER GROUND TO ESCAPE FLOOD WATERS. DO NOT STAY IN AREAS SUBJECT TO FLOODING WHEN WATER BEGINS RISING. LAT...LON 4149 9285 4150 9243 4116 9245 4117 9286 TIME...MOT...LOC 0532Z 180DEG 0KT 4133 9249 $$ SMALL
000 WGUS73 KDMX 090644 FFSDMX FLASH FLOOD STATEMENT NATIONAL WEATHER SERVICE DES MOINES IA 140 AM CDT THU AUG 9 2007 IAC123-090800- MAHASKA IA- 140 AM CDT THU AUG 9 2007 ...A FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 300 AM CDT FOR MAHASKA COUNTY... AT 140 AM CDT...FLOODING CONTINUED ACROSS PORTIONS OF MAHASKA COUNTY. REPORTS FROM THE MAHASKA COUNTY SHERIFF AT AROUND 1100 PM INDICATED THAT WATER FROM THE NORTH SKUNK RIVER WAS REPORTED FLOWING OVER THE 2200 BLOCK OF 110TH STREET AND WATER WAS OVER THE 2300 BLOCK OF MERINO ROAD FLOWING OUT OF A FARM FIELD. NUMEROUS VEHICLES HAD BEEN STRANDED IN FLOWING OR STANDING WATER. HOWEVER AT 135 AM THE SHERIFFS DEPARTMENT REPORTED THAT HIGHWAY 63 WAS NO LONGER CLOSED. RAIN GAGES HAVE REPORTED AROUND FOUR INCHES OF RAIN IN THE FAR EASTERN PORTION OF THE COUNTY EAST OF TRACY...AND 3.75 INCHES IN OSKALOOSA. NATIONAL WEATHER SERVICE DOPPLER RADAR ESTIMATES INDICATED THAT UP TO FIVE INCHES OF RAIN MAY HAVE FALLEN IN OTHER LOCATIONS. LITTLE IF ANY ADDITIONAL RAIN IS EXPECTED ACROSS THE COUNTY OVERNIGHT. EXCESSIVE RUNOFF FROM HEAVY RAINFALL WILL CAUSE FLOODING OF SMALL CREEKS AND STREAMS...HIGHWAYS AND UNDERPASSES. ADDITIONALLY...COUNTRY ROADS AND FARMLANDS ALONG THE BANKS OF CREEKS...STREAMS AND OTHER LOW LYING AREAS ARE SUBJECT TO FLOODING. BE ESPECIALLY CAUTIOUS AT NIGHT WHEN IT IS HARDER TO RECOGNIZE THE DANGERS OF FLOODING. IF FLASH FLOODING IS OBSERVED ACT QUICKLY. MOVE UP TO HIGHER GROUND TO ESCAPE FLOOD WATERS. DO NOT STAY IN AREAS SUBJECT TO FLOODING WHEN WATER BEGINS RISING. LAT...LON 4149 9285 4150 9243 4116 9245 4117 9286 TIME...MOT...LOC 0532Z 180DEG 0KT 4133 9249 $$ MOYER/SMALL
000 WGUS73 KDMX 090803 FFSDMX FLASH FLOOD STATEMENT NATIONAL WEATHER SERVICE DES MOINES IA 301 AM CDT THU AUG 9 2007 IAC123-090811- MAHASKA IA- 301 AM CDT THU AUG 9 2007 ...THE FLASH FLOOD WARNING HAS EXPIRED FOR MAHASKA COUNTY... AT 245 AM CDT...MAHASKA COUNTY LAW ENFORCEMENT REPORTED THAT WATER WAS RECEDING AND THAT MOST IF NOT ALL ROADS THAT WERE PREVIOUSLY AFFECTED BY FLOOD WATER WERE NOW PASSABLE. NO ADDITIONAL RAINFALL IS EXPECTED FOR THE REMAINDER OF THE NIGHT AND DAY. LAT...LON 4149 9285 4150 9243 4116 9245 4117 9286 TIME...MOT...LOC 0644Z 180DEG 0KT 4133 9249 $$ MOYER
The office that day
Everything else NWS Des Moines, IA issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Aug 8, 7:15 PM CDT | Tornado Warning | DMX | Taylor | 45 min |
| Aug 8, 7:57 PM CDT | Severe Thunderstorm Warning | DMX | Ringgold | 48 min |
| Aug 8, 8:02 PM CDT | Flash Flood Warning | DMX | Ringgold, Taylor | 6 hr |
| Aug 8, 8:32 PM CDT | Severe Thunderstorm Warning | DMX | Decatur | 43 min |
Nearby
Flash Flood Warnings in Iowa, 2007Every flash flood warning in 2007
Sources
The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.