Alert archive / Wisconsin / Flash Flood Warnings in 2009
Flash Flood Warning 9, NWS Twin Cities, MN
NWS Twin Cities, MN issued this flash flood warning at Aug 13, 2009, 10:27 PM CDT for Chippewa County, Eau Claire County, Wisconsin. It was in force for 4 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
- Aug 13, 2009, 10:27 PM CDT (03:27 UTC)
- Expired
- Aug 14, 2009, 2:30 AM CDT
- In force
- 4 hr
- Issued by
- NWS Twin Cities, MN
- Area
- Storm-based polygon
- Flood severity
- None
Counties Chippewa County, WI, Eau Claire County, WI
The radar
The La Crosse radar (KARX), 105 km from the middle of the area, began a volume at 03:28 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 14, 12:07 AM CDT | FLASH FLOOD | 1 S Eau Claire, WI | LOWES CREEK ROAD WASHED OUT JUST OUTSIDE OF EAU CLAIRE. |
Local storm reports filed while the alert was in force, from inside its polygon or its counties.
The nearest sounding before it
Minneapolis, MN (KMPX), launched 00:00Z, 3.5 hours before the alert went out and 177 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
- 68 J/kg
- Mixed-layer CIN
- -235 J/kg
- Mixed-layer LCL
- 1298 m above ground
- 0-6 km bulk shear
- 19 kt
- 0-1 km storm-relative helicity
- 3 m²/s²
- 0-3 km storm-relative helicity
- 90 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- -0.1
The text
As transmitted, in the capitals the NWS used until 2016.
000 WGUS53 KMPX 140327 FFWMPX WIC017-035-140730- /O.NEW.KMPX.FF.W.0009.090814T0327Z-090814T0730Z/ /00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/ BULLETIN - EAS ACTIVATION REQUESTED FLASH FLOOD WARNING NATIONAL WEATHER SERVICE TWIN CITIES/CHANHASSEN MN 1027 PM CDT THU AUG 13 2009 THE NATIONAL WEATHER SERVICE IN THE TWIN CITIES HAS ISSUED A * FLASH FLOOD WARNING FOR... EAU CLAIRE COUNTY IN WEST CENTRAL WISCONSIN SOUTHERN CHIPPEWA COUNTY IN WEST CENTRAL WISCONSIN * UNTIL 230 AM CDT * AT 1020 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED SLOW MOVING THUNDERSTORMS WITH VERY HEAVY RAINFALL SPREADING INTO THE WARNING AREA FROM SOUTHERN DUNN AND PEPIN COUNTY. DOPPLER RADAR HAS ESTIMATED THAT 4 INCHES OF RAIN HAS FALLEN DURING THE PAST 3 HOURS TO THE WEST OF THE WARNED AREA. SIMILAR AMOUNTS WILL BE POSSIBLE ACROSS THE WARNED AREA. * RUNOFF FROM THIS EXCESSIVE RAINFALL WILL CAUSE FLASH FLOODING TO OCCUR. SOME LOCATIONS THAT WILL EXPERIENCE FLOODING INCLUDE... CHIPPEWA FALLS...EAU CLAIRE...ALTOONA...BATEMAN...BOYD... BRACKETT...CADOTT...FAIRCHILD...FALL CREEK...FOSTER...LAKE HALLIE...LAKE WISSOTA...LUDINGTON AND STANLEY. THERE HAVE REPORTS OF FLOODED ROADS IN SOUTHERN PIERCE COUNTY WITH THESE THUNDERSTORMS. PRECAUTIONARY/PREPAREDNESS ACTIONS... EXCESSIVE RUNOFF FROM HEAVY RAINFALL WILL CAUSE FLOODING OF SMALL CREEKS AND STREAMS...URBAN AREAS...HIGHWAYS...STREETS AND UNDERPASSES AS WELL AS OTHER DRAINAGE AREAS AND LOW LYING SPOTS. 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 4459 9165 4501 9166 4500 9091 4459 9092 $$
The office that day
Everything else NWS Twin Cities, MN issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Aug 13, 8:38 PM CDT | Special Weather Statement | MPX | Pierce | 37 min |
| Aug 13, 8:40 PM CDT | Severe Thunderstorm Warning | MPX | Pierce | 35 min |
| Aug 13, 9:45 PM CDT | Flash Flood Warning | MPX | Dunn, Pepin, Pierce | 3 hr |
| Aug 13, 10:16 PM CDT | Special Weather Statement | MPX | Pepin | 44 min |
| Aug 13, 11:05 PM CDT | Special Weather Statement | MPX | Chippewa, Eau Claire | 55 min |
| Aug 14, 12:11 AM CDT | Flash Flood Warning | MPX | Dunn, Pepin, Pierce | 6 hr |
| Aug 14, 12:43 AM CDT | Special Weather Statement | MPX | Pepin | 47 min |
Nearby
Flash Flood Warnings in Wisconsin, 2009Every flash flood warning in 2009
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.