Alert archive / Iowa / Flash Flood Warnings in 2012
Flash Flood Warning 7, NWS Quad Cities, IA
NWS Quad Cities, IA issued this flash flood warning at May 4, 2012, 6:34 AM CDT for Keokuk County, Iowa. It was in force for 4 hr. 2 reports 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
- May 4, 2012, 6:34 AM CDT (11:34 UTC)
- Expired
- May 4, 2012, 10:47 AM CDT
- In force
- 4 hr
- Issued by
- NWS Quad Cities, IA
- Area
- Storm-based polygon
- Flood severity
- None
County Keokuk County, IA
The radar
The Des Moines radar (KDMX), 131 km from the middle of the area, began a volume at 11:34 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 |
|---|---|---|---|
| May 4, 7:14 AM CDT | HEAVY RAIN 1.1 | 4 E What Cheer, IA | 24HR TOTAL SOME AREAS OF FLASH FLOODING OVERNIGHT. |
| May 4, 10:37 AM CDT | HEAVY RAIN 2.6 | Keswick, IA | WESTERN PART OF KEOKUK CO. REPORTED 2.00 INCHES RAIN BETWEEN 6AM TO 8AM. EASTERN PART OF KEOKUK HAD 2.60 INCHES BEFORE 6AM. MINOR FLASH FLOODING. ENGLISH RIVER BASIN ON THE RISE. ESTIMATE THE WATER MAY BE OVER ROAD AT KESWICK AND S. ENGLISH BY AFTERNOON. |
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, 11.6 hours before the alert went out and 146 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
- 1056 J/kg
- Mixed-layer CIN
- -39 J/kg
- Mixed-layer LCL
- 1420 m above ground
- 0-6 km bulk shear
- 34 kt
- 0-1 km storm-relative helicity
- 42 m²/s²
- 0-3 km storm-relative helicity
- 100 m²/s²
- Significant tornado parameter
- 0.1
- Supercell composite
- 1.7
The text
As transmitted, in the capitals the NWS used until 2016.
587 WGUS53 KDVN 041134 FFWDVN IAC107-041630- /O.NEW.KDVN.FF.W.0007.120504T1134Z-120504T1630Z/ /00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/ BULLETIN - EAS ACTIVATION REQUESTED FLASH FLOOD WARNING NATIONAL WEATHER SERVICE QUAD CITIES IA IL 634 AM CDT FRI MAY 4 2012 THE NATIONAL WEATHER SERVICE IN THE QUAD CITIES HAS ISSUED A * FLASH FLOOD WARNING FOR... KEOKUK COUNTY IN SOUTHEAST IOWA... THIS INCLUDES THE CITY OF SIGOURNEY... * UNTIL 1130 AM CDT * AT 627 AM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED FLASH FLOODING FROM THUNDERSTORMS OVER THE WARNED AREA. * LOCATIONS IN THE WARNING INCLUDE BUT ARE NOT LIMITED TO WHAT CHEER...SOUTH ENGLISH...KINROSS...KESWICK AND HARPER. PRECAUTIONARY/PREPAREDNESS ACTIONS... AS MUCH AS 1.75 TO 2.5 INCHES OF RAIN HAS FALLEN OVER THE PAST 2 HOURS. AN ADDITIONAL 1 TO 2 INCHES OF RAIN IS EXPECTED TO FALL. FLASH FLOODING IS LIKELY ON BRIDGE AND ROCK CREEKS...AS WELL AS ALONG THE SOUTH ENGLISH RIVER. FLOODING OF SMALL STREAMS AND CREEKS...HIGHWAYS AND STREETS... UNDERPASSES AND LOW LYING URBAN AND RURAL AREAS IS LIKELY. && LAT...LON 4151 9241 4151 9194 4116 9195 4117 9241 $$ 12
1 follow-up statement
135 WGUS73 KDVN 041547 FFSDVN FLASH FLOOD STATEMENT NATIONAL WEATHER SERVICE QUAD CITIES IA IL 1047 AM CDT FRI MAY 4 2012 IAC107-041556- /O.CAN.KDVN.FF.W.0007.000000T0000Z-120504T1630Z/ /00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/ KEOKUK IA- 1047 AM CDT FRI MAY 4 2012 ...THE FLASH FLOOD WARNING HAS BEEN CANCELLED FOR KEOKUK COUNTY... NO RAIN HAS FALLEN ACROSS KEOKUK COUNTY OVER THE PAST SEVERAL HOURS. CALLS TO THE SHERIFF OFFICE INDICATE NO KNOWN PROBLEMS ACROSS THE COUNTY. LAT...LON 4151 9241 4151 9194 4116 9195 4117 9241 $$ 08
The office that day
Everything else NWS Quad Cities, IA issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| May 3, 7:31 PM CDT | Special Weather Statement | DVN | Benton | 29 min |
| May 3, 8:23 PM CDT | Special Weather Statement | DVN | Louisa, Washington | 52 min |
| May 3, 8:23 PM CDT | Severe Thunderstorm Warning | DVN | Benton | 15 min |
| May 3, 8:27 PM CDT | Tornado Warning | DVN | Henry, Jefferson, Louisa, Washington | 33 min |
| May 3, 8:40 PM CDT | Severe Thunderstorm Warning | DVN | Cedar, Johnson, Linn | 35 min |
| May 3, 8:58 PM CDT | Tornado Warning | DVN | Henry, Louisa, Muscatine, Washington | 32 min |
| May 3, 9:14 PM CDT | Severe Thunderstorm Warning | DVN | Cedar, Clinton, Scott | 31 min |
| May 3, 9:29 PM CDT | Tornado Warning | DVN | Louisa, Muscatine | 17 min |
| May 3, 9:46 PM CDT | Severe Thunderstorm Warning | DVN | Cedar, Muscatine, Scott | 43 min |
| May 3, 9:58 PM CDT | Flash Flood Warning | DVN | Keokuk, Louisa, Washington | 6 hr |
| May 3, 10:20 PM CDT | Flash Flood Warning | DVN | Cedar, Johnson, Louisa, Muscatine, Washington | 6 hr |
| May 3, 10:22 PM CDT | Severe Thunderstorm Warning | DVN | Clinton, Scott | 38 min |
| May 3, 10:44 PM CDT | Flash Flood Warning | DVN | Louisa, Scott | 6 hr |
| May 3, 11:59 PM CDT | Flash Flood Watch | DVN | Des Moines, Henry, Jefferson, Keokuk, Lee, Louisa and 4 more | 9 hr |
| May 4, 12:06 AM CDT | Severe Thunderstorm Warning | DVN | Louisa, Muscatine | 24 min |
| May 4, 1:10 AM CDT | Flash Flood Warning | DVN | Henry, Jefferson | 6 hr |
| May 4, 2:26 AM CDT | Special Weather Statement | DVN | Des Moines, Lee, Van Buren | 49 min |
| May 4, 2:40 AM CDT | Flash Flood Warning | DVN | Lee, Van Buren | 6 hr |
| May 4, 3:07 AM CDT | Severe Thunderstorm Warning | DVN | Lee | 38 min |
| May 4, 4:04 AM CDT | Areal Flood Warning | DVN | Louisa, Muscatine, Washington | 9 hr |
| May 4, 6:26 AM CDT | Severe Thunderstorm Warning | DVN | Keokuk | 49 min |
| May 4, 11:59 AM CDT | River Flood Warning | DVN | Des Moines, Henry, Lee | 71 hr |
| May 4, 3:31 PM CDT | Flash Flood Watch | DVN | Benton, Cedar, Clinton, Des Moines, Henry, Iowa and 12 more | 11 hr |
Nearby
Flash Flood Warnings in Iowa, 2012Every flash flood warning in 2012
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.