Alert archive / Iowa / Flash Flood Warnings in 2011
Flash Flood Warning 18, NWS Des Moines, IA
NWS Des Moines, IA issued this flash flood warning at Jun 15, 2011, 12:12 AM CDT for Monroe County, Wapello County, Iowa. It was in force for 6 hr. 1 report came from inside the area while it was in force.
The area
The outline as issued, with what was reported inside it.
The facts
- Issued
- Jun 15, 2011, 12:12 AM CDT (05:12 UTC)
- Expired
- Jun 15, 2011, 6:00 AM CDT
- In force
- 6 hr
- Issued by
- NWS Des Moines, IA
- Area
- Storm-based polygon
- Flood severity
- None
Counties Monroe County, IA, Wapello County, IA
The radar
The Des Moines radar (KDMX), 131 km from the middle of the area, began a volume at 05:15 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 |
|---|---|---|---|
| Jun 15, 1:00 AM CDT | FLASH FLOOD | Ottumwa, IA | HARROWS CREEK OUT OF ITS BANK AND FLOWING ACROSS WEST SECOND STREET. CARS STRANDED ON NORTH JEFFERSON STREET. PORTION OF THE 1600 BLOCK OF EAST MAIN STREET WASHED OUT BY FLOOD WATERS. THESE ROADS WERE CLOSED BY LAW ENFORCEMENT. |
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, 5.2 hours before the alert went out and 180 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
- 1429 m above ground
- 0-6 km bulk shear
- 39 kt
- 0-1 km storm-relative helicity
- 42 m²/s²
- 0-3 km storm-relative helicity
- 238 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.2
The text
As transmitted, in the capitals the NWS used until 2016.
414 WGUS53 KDMX 150512 FFWDMX IAC135-179-151100- /O.NEW.KDMX.FF.W.0018.110615T0512Z-110615T1100Z/ /00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/ BULLETIN - EAS ACTIVATION REQUESTED FLASH FLOOD WARNING NATIONAL WEATHER SERVICE DES MOINES IA 1212 AM CDT WED JUN 15 2011 THE NATIONAL WEATHER SERVICE IN DES MOINES HAS ISSUED A * FLASH FLOOD WARNING FOR... EASTERN MONROE COUNTY IN SOUTH CENTRAL IOWA... WAPELLO COUNTY IN SOUTHEAST IOWA... * UNTIL 600 AM CDT * AT 1208 AM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED SLOW MOVING THUNDERSTORMS WITH VERY HEAVY RAINFALL ACROSS THE WARNED AREA. LOCAL LAW ENFORCEMENT AND TRAINED SPOTTERS ALSO REPORTED LOCALIZED STREET FLOODING IN THE OTTUMWA AREA...WITH LOW LYING STREETS UNDER AS MUCH AS THREE FEET OF STANDING WATER. * RUNOFF FROM THIS EXCESSIVE RAINFALL WILL CAUSE FLASH FLOODING TO OCCUR. SOME LOCATIONS THAT WILL EXPERIENCE FLOODING INCLUDE... OTTUMWA AND ALBIA. PRECAUTIONARY/PREPAREDNESS ACTIONS... BE ESPECIALLY CAUTIOUS AT NIGHT WHEN IT IS HARDER TO RECOGNIZE THE DANGERS OF FLOODING. IF FLASH FLOODING IS OBSERVED ACT QUICKLY. DO NOT ENTER THE WATER. TURN AROUND AND MOVE UP TO HIGHER GROUND TO ESCAPE FLOOD WATERS. DO NOT STAY IN AREAS SUBJECT TO FLOODING WHEN WATER BEGINS RISING. && LAT...LON 4092 9221 4090 9297 4114 9289 4116 9217 $$ SKOW
6 follow-up statements
068 WGUS73 KDMX 150550 FFSDMX FLASH FLOOD STATEMENT NATIONAL WEATHER SERVICE DES MOINES IA 1250 AM CDT WED JUN 15 2011 IAC135-179-151100- /O.CON.KDMX.FF.W.0018.000000T0000Z-110615T1100Z/ /00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/ WAPELLO IA-MONROE IA- 1250 AM CDT WED JUN 15 2011 ...FLASH FLOOD WARNING REMAINS IN EFFECT FOR EASTERN MONROE AND WAPELLO COUNTIES UNTIL 600 AM CDT... AT 1236 AM CDT...LOCAL LAW ENFORCEMENT OFFICIALS REPORTED THAT HARROWS CREEK IN OTTUMWA HAD RISEN OUT OF ITS BANKS AND WAS FLOWING OVER WEST SECOND STREET. OFFICIALS ALSO REPORTED CARS STRANDED IN FLOODWATERS ALONG NORTH JEFFERSON STREET IN OTTUMWA. THESE SECTIONS OF ROADS HAVE BEEN CLOSED. DOPPLER RADAR INDICATED THAT THE STRONGEST STORMS HAD WEAKENED AND MOVED OUT OF THE OTTUMWA AREA...BUT MORE STORMS WERE DEVELOPING BEHIND THIS LINE AND COULD BRING ADDITIONAL RAINFALL OVERNIGHT. FLASH FLOODING IS EXPECTED TO CONTINUE THROUGH THE OVERNIGHT HOURS. RUNOFF FROM THIS EXCESSIVE RAINFALL WILL CAUSE FLASH FLOODING TO OCCUR. SOME LOCATIONS THAT WILL EXPERIENCE FLASH FLOODING INCLUDE... OTTUMWA AND ALBIA. PRECAUTIONARY/PREPAREDNESS ACTIONS... FLOODING HAS BEEN REPORTED IN THE CITY OF OTTUMWA. PLEASE BE CAUTIOUS IF YOU MUST DRIVE IN THE CITY TONIGHT. BE ESPECIALLY CAUTIOUS AT NIGHT WHEN IT IS HARDER TO RECOGNIZE THE DANGERS OF FLOODING. IF FLOODING IS OBSERVED...ACT QUICKLY. DO NOT ENTER THE WATER. TURN AROUND AND MOVE UP TO HIGHER GROUND. DO NOT STAY IN AREAS SUBJECT TO FLOODING WHEN WATER BEGINS RISING. && LAT...LON 4092 9221 4090 9297 4114 9289 4116 9217 $$ SKOW
147 WGUS73 KDMX 150618 FFSDMX FLASH FLOOD STATEMENT NATIONAL WEATHER SERVICE DES MOINES IA 118 AM CDT WED JUN 15 2011 IAC135-179-151100- /O.CON.KDMX.FF.W.0018.000000T0000Z-110615T1100Z/ /00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/ WAPELLO IA-MONROE IA- 118 AM CDT WED JUN 15 2011 ...FLASH FLOOD WARNING REMAINS IN EFFECT FOR EASTERN MONROE AND WAPELLO COUNTIES UNTIL 600 AM CDT... AT 112 AM CDT...LOCAL LAW ENFORCEMENT OFFICIALS REPORTED THAT LOW LYING AREAS OF MANY ROADS IN TOWN WERE COVERED IN WATER. HARROWS CREEK IN OTTUMWA HAS RISEN OUT OF ITS BANKS AND IS FLOWING OVER WEST SECOND STREET. OFFICIALS ALSO REPORTED CARS STRANDED IN FLOODWATERS ALONG NORTH JEFFERSON STREET AND A PORTION OF THE 1600 BLOCK OF EAST MAIN STREET WASHED OUT BY FLOODWATERS. THESE THREE SECTIONS OF ROAD HAVE BEEN CLOSED. DOPPLER RADAR INDICATED THAT THE STRONGEST STORMS HAD WEAKENED AND MOVED OUT OF THE OTTUMWA AREA...BUT MORE STORMS WERE DEVELOPING BEHIND THIS LINE AND COULD BRING ADDITIONAL RAINFALL OVERNIGHT. FLASH FLOODING IS EXPECTED TO CONTINUE THROUGH THE OVERNIGHT HOURS. RUNOFF FROM THIS EXCESSIVE RAINFALL WILL CAUSE FLASH FLOODING TO OCCUR. SOME LOCATIONS THAT WILL EXPERIENCE FLASH FLOODING INCLUDE... OTTUMWA AND ALBIA. PRECAUTIONARY/PREPAREDNESS ACTIONS... FLOODING HAS BEEN REPORTED IN THE CITY OF OTTUMWA. PLEASE BE CAUTIOUS IF YOU MUST DRIVE IN THE CITY TONIGHT. BE ESPECIALLY CAUTIOUS AT NIGHT WHEN IT IS HARDER TO RECOGNIZE THE DANGERS OF FLOODING. IF FLOODING IS OBSERVED...ACT QUICKLY. DO NOT ENTER THE WATER. TURN AROUND AND MOVE UP TO HIGHER GROUND. DO NOT STAY IN AREAS SUBJECT TO FLOODING WHEN WATER BEGINS RISING. && LAT...LON 4092 9221 4090 9297 4114 9289 4116 9217 $$ SKOW
124 WGUS73 KDMX 150728 FFSDMX FLASH FLOOD STATEMENT NATIONAL WEATHER SERVICE DES MOINES IA 228 AM CDT WED JUN 15 2011 IAC135-179-151100- /O.CON.KDMX.FF.W.0018.000000T0000Z-110615T1100Z/ /00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/ WAPELLO IA-MONROE IA- 228 AM CDT WED JUN 15 2011 ...FLASH FLOOD WARNING REMAINS IN EFFECT FOR EASTERN MONROE AND WAPELLO COUNTIES UNTIL 600 AM CDT... AT 215 AM CDT...LOCAL LAW ENFORCEMENT OFFICIALS REPORTED THAT LOW LYING AREAS OF MANY ROADS IN TOWN WERE COVERED IN WATER. HARROWS CREEK IN OTTUMWA HAS RISEN OUT OF ITS BANKS AND IS FLOWING OVER WEST SECOND STREET. OFFICIALS ALSO REPORTED CARS STRANDED IN FLOODWATERS ALONG NORTH JEFFERSON STREET AND A PORTION OF THE 1600 BLOCK OF EAST MAIN STREET WASHED OUT BY FLOODWATERS. THESE THREE SECTIONS OF ROAD HAVE BEEN CLOSED. DOPPLER RADAR INDICATED THAT THE STRONGEST STORMS HAD WEAKENED AND MOVED OUT OF THE OTTUMWA AREA. ANOTHER ROUND OF THUNDERSTORMS HAS FORMED AND IS MOVING THROUGH THE AREA. THE RAIN HAS ENDED IN MONROE COUNTY...BUT WILL LAST UNTIL 300 TO 330 IN WAPELLO COUNTY. AN ADDITIONAL ONE HALF TO ONE INCH OF RAIN IS POSSIBLE. FLASH FLOODING IS EXPECTED TO CONTINUE THROUGH THE OVERNIGHT HOURS. RUNOFF FROM THIS EXCESSIVE RAINFALL WILL CAUSE FLASH FLOODING TO OCCUR. SOME LOCATIONS THAT WILL EXPERIENCE FLASH FLOODING INCLUDE... OTTUMWA AND ALBIA. PRECAUTIONARY/PREPAREDNESS ACTIONS... BE ESPECIALLY CAUTIOUS AT NIGHT WHEN IT IS HARDER TO RECOGNIZE THE DANGERS OF FLOODING. IF FLOODING IS OBSERVED...ACT QUICKLY. DO NOT ENTER THE WATER. TURN AROUND AND MOVE UP TO HIGHER GROUND. DO NOT STAY IN AREAS SUBJECT TO FLOODING WHEN WATER BEGINS RISING. && LAT...LON 4092 9221 4090 9297 4114 9289 4116 9217 $$
081 WGUS73 KDMX 150831 FFSDMX FLASH FLOOD STATEMENT NATIONAL WEATHER SERVICE DES MOINES IA 331 AM CDT WED JUN 15 2011 IAC135-179-151100- /O.CON.KDMX.FF.W.0018.000000T0000Z-110615T1100Z/ /00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/ WAPELLO IA-MONROE IA- 331 AM CDT WED JUN 15 2011 ...FLASH FLOOD WARNING REMAINS IN EFFECT FOR EASTERN MONROE AND WAPELLO COUNTIES UNTIL 600 AM CDT... AT 315 AM CDT...LOCAL LAW ENFORCEMENT OFFICIALS REPORTED THAT LOW LYING AREAS OF MANY ROADS IN TOWN WERE COVERED IN WATER. HARROWS CREEK IN OTTUMWA HAD RISEN OUT OF ITS BANKS AND WAS FLOWING OVER WEST SECOND STREET. OFFICIALS ALSO REPORTED CARS STRANDED IN FLOODWATERS ALONG NORTH JEFFERSON STREET AND A PORTION OF THE 1600 BLOCK OF EAST MAIN STREET WASHED OUT BY FLOODWATERS. THESE THREE SECTIONS OF ROAD HAVE BEEN CLOSED. DOPPLER RADAR INDICATED THAT THE STRONGEST STORMS HAD MOVED OUT OF THE AREA. THE RAINFALL HAS ENDED AND NO ADDITIONAL RAINFALL IS EXPECTED. FLASH FLOODING IS EXPECTED TO CONTINUE THROUGH THE OVERNIGHT HOURS. RUNOFF FROM THIS EXCESSIVE RAINFALL WILL CAUSE FLASH FLOODING TO OCCUR. SOME LOCATIONS THAT WILL EXPERIENCE FLASH FLOODING INCLUDE... OTTUMWA AND ALBIA. PRECAUTIONARY/PREPAREDNESS ACTIONS... DO NOT DRIVE YOUR VEHICLE INTO AREAS WHERE THE WATER COVERS THE ROADWAY. FLOOD WATERS ARE USUALLY DEEPER THAN THEY APPEAR AND THE WATER DEPTH MAY BE TOO GREAT TO ALLOW YOUR CAR TO CROSS SAFELY. TURN AROUND...DONT DROWN. BE ESPECIALLY CAUTIOUS AT NIGHT WHEN IT IS HARDER TO RECOGNIZE THE DANGERS OF FLOODING. IF FLOODING IS OBSERVED...ACT QUICKLY. DO NOT ENTER THE WATER. TURN AROUND AND MOVE UP TO HIGHER GROUND. DO NOT STAY IN AREAS SUBJECT TO FLOODING WHEN WATER BEGINS RISING. && LAT...LON 4092 9221 4090 9297 4114 9289 4116 9217 $$
225 WGUS73 KDMX 150923 FFSDMX FLASH FLOOD STATEMENT NATIONAL WEATHER SERVICE DES MOINES IA 423 AM CDT WED JUN 15 2011 IAC135-179-151100- /O.CON.KDMX.FF.W.0018.000000T0000Z-110615T1100Z/ /00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/ WAPELLO IA-MONROE IA- 423 AM CDT WED JUN 15 2011 ...FLASH FLOOD WARNING REMAINS IN EFFECT FOR EASTERN MONROE AND WAPELLO COUNTIES UNTIL 600 AM CDT... AT 410 AM CDT...LOCAL LAW ENFORCEMENT OFFICIALS REPORTED THAT THE WATER IN OTTUMWA WAS RECEDING AND THAT ALL STREETS WERE NOW BEEN REOPENED. SOME PONDING OF WATER WAS STILL REPORTED IN THE AREA HOWEVER. DOPPLER RADAR INDICATED THAT THE THUNDERSTORMS THAT PRODUCED THE HEAVY RAINFALL HAD MOVED OUT OF THE AREA. THE RAINFALL HAS ENDED AND NO ADDITIONAL RAINFALL IS EXPECTED. FLASH FLOODING IS EXPECTED TO CONTINUE THROUGH THE OVERNIGHT HOURS. RUNOFF FROM THIS EXCESSIVE RAINFALL WILL CAUSE FLASH FLOODING TO OCCUR. SOME LOCATIONS THAT WILL EXPERIENCE FLASH FLOODING INCLUDE... OTTUMWA AND ALBIA. PRECAUTIONARY/PREPAREDNESS ACTIONS... DO NOT DRIVE YOUR VEHICLE INTO AREAS WHERE THE WATER COVERS THE ROADWAY. FLOOD WATERS ARE USUALLY DEEPER THAN THEY APPEAR AND THE WATER DEPTH MAY BE TOO GREAT TO ALLOW YOUR CAR TO CROSS SAFELY. TURN AROUND...DONT DROWN. BE ESPECIALLY CAUTIOUS AT NIGHT WHEN IT IS HARDER TO RECOGNIZE THE DANGERS OF FLOODING. IF FLOODING IS OBSERVED...ACT QUICKLY. DO NOT ENTER THE WATER. TURN AROUND AND MOVE UP TO HIGHER GROUND. DO NOT STAY IN AREAS SUBJECT TO FLOODING WHEN WATER BEGINS RISING. && LAT...LON 4092 9221 4090 9297 4114 9289 4116 9217 $$
140 WGUS73 KDMX 151056 FFSDMX FLASH FLOOD STATEMENT NATIONAL WEATHER SERVICE DES MOINES IA 556 AM CDT WED JUN 15 2011 IAC135-179-151108- /O.EXP.KDMX.FF.W.0018.000000T0000Z-110615T1100Z/ /00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/ WAPELLO IA-MONROE IA- 556 AM CDT WED JUN 15 2011 ...THE FLASH FLOOD WARNING THAT WAS IN EFFECT FOR EASTERN MONROE AND WAPELLO COUNTIES WILL BE ALLOWED TO EXPIRE AT 600 AM CDT... EXCESS RUNOFF FROM HEAVY RAIN HAS ENDED OVER THE WARNED AREA. LOCAL LAW ENFORCEMENT REPORTED THAT WATER HAD RECEDED IN MOST AREAS. SOME PONDING IS STILL POSSIBLE IN LOW LYING AREAS AND PEOPLE SHOULD REMAIN ATTENTIVE. IF FLOODING HAS BEEN OBSERVED...PLEASE REPORT IT TO YOUR LOCAL LAW ENFORCEMENT AGENCY. LAT...LON 4092 9221 4090 9297 4114 9289 4116 9217 $$
The office that day
Everything else NWS Des Moines, IA issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jun 14, 8:56 PM CDT | Severe Thunderstorm Warning | DMX | Appanoose, Lucas, Monroe, Wayne | 49 min |
| Jun 14, 9:57 PM CDT | Severe Thunderstorm Warning | DMX | Clarke, Lucas, Marion, Warren | 48 min |
| Jun 14, 10:10 PM CDT | River Flood Warning | DMX | Emmet | 45 days |
| Jun 14, 10:30 PM CDT | Severe Thunderstorm Warning | DMX | Clarke, Decatur, Lucas, Wayne | 60 min |
| Jun 15, 11:02 AM CDT | Areal Flood Warning | DMX | Mahaska, Marion | 10 hr |
Nearby
Flash Flood Warnings in Iowa, 2011Every flash flood warning in 2011
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.