Alert archive / Iowa / Flash Flood Warnings in 2012
Flash Flood Warning 10, NWS Quad Cities, IA
NWS Quad Cities, IA issued this flash flood warning at Aug 4, 2012, 1:19 PM CDT for Linn County, Iowa. It was in force for 82 min. 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
- Aug 4, 2012, 1:19 PM CDT (18:19 UTC)
- Expired
- Aug 4, 2012, 2:41 PM CDT
- In force
- 82 min
- Issued by
- NWS Quad Cities, IA
- Area
- Storm-based polygon
- Flood severity
- None
County Linn County, IA
The radar
The Quad Cities radar (KDVN), 94 km from the middle of the area, began a volume at 18:19 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 4, 1:52 PM CDT | HEAVY RAIN 1.9 | 1 Sse Cedar Rapids, IA | STORM TOTAL |
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 12:00Z, 6.3 hours before the alert went out and 100 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
- 1247 J/kg
- Mixed-layer CIN
- -144 J/kg
- Mixed-layer LCL
- 1158 m above ground
- 0-6 km bulk shear
- 30 kt
- 0-1 km storm-relative helicity
- 32 m²/s²
- 0-3 km storm-relative helicity
- 52 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 1.8
The text
As transmitted, in the capitals the NWS used until 2016.
176 WGUS53 KDVN 041819 FFWDVN IAC113-042015- /O.NEW.KDVN.FF.W.0010.120804T1819Z-120804T2015Z/ /00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/ BULLETIN - EAS ACTIVATION REQUESTED FLASH FLOOD WARNING NATIONAL WEATHER SERVICE QUAD CITIES IA IL 119 PM CDT SAT AUG 4 2012 THE NATIONAL WEATHER SERVICE IN THE QUAD CITIES HAS ISSUED A * FLASH FLOOD WARNING FOR... SOUTHERN LINN COUNTY IN EAST CENTRAL IOWA... THIS INCLUDES THE CITY OF CEDAR RAPIDS... * UNTIL 315 PM CDT * AT 111 PM CDT...EMERGENCY MANAGEMENT OFFICIALS REPORTED FLASH FLOODING FROM A THUNDERSTORM OVER CEDAR RAPIDS. * LOCATIONS IN THE WARNING INCLUDE BUT ARE NOT LIMITED TO THE CEDAR RAPIDS METRO AREA. PRECAUTIONARY/PREPAREDNESS ACTIONS... DO NOT DRIVE ON FLOODED ROADS. MOST FATALITIES OCCUR IN VEHICLES SWEPT AWAY IN FLOOD WATERS AS SHALLOW AS 1 FOOT. FLOODING OF SMALL STREAMS AND CREEKS...STREETS...UNDERPASSES AND LOW LYING URBAN AREAS IS OCCURRING. && LAT...LON 4204 9174 4204 9141 4187 9140 4187 9175 $$ WOLF
1 follow-up statement
934 WGUS73 KDVN 041941 FFSDVN FLASH FLOOD STATEMENT NATIONAL WEATHER SERVICE QUAD CITIES IA IL 241 PM CDT SAT AUG 4 2012 IAC113-041950- /O.CAN.KDVN.FF.W.0010.000000T0000Z-120804T2015Z/ /00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/ LINN IA- 241 PM CDT SAT AUG 4 2012 ...THE FLASH FLOOD WARNING HAS BEEN CANCELLED FOR SOUTHERN LINN COUNTY... LAT...LON 4204 9174 4204 9141 4187 9140 4187 9175 $$ WOLF
The office that day
Everything else NWS Quad Cities, IA issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Aug 4, 11:18 AM CDT | Special Weather Statement | DVN | Benton, Buchanan, Delaware, Henry, Iowa, Jefferson and 4 more | 102 min |
| Aug 4, 12:05 PM CDT | Severe Thunderstorm Warning | DVN | Benton, Buchanan, Delaware, Iowa, Johnson, Keokuk and 2 more | 55 min |
| Aug 4, 12:38 PM CDT | Severe Thunderstorm Warning | DVN | Cedar, Clinton, Delaware, Dubuque, Jackson, Johnson and 5 more | 67 min |
| Aug 4, 12:59 PM CDT | Severe Thunderstorm Warning | DVN | Des Moines, Louisa, Muscatine, Scott | 76 min |
| Aug 4, 1:39 PM CDT | Flash Flood Warning | DVN | Scott | 70 min |
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.