Alert archive / Wisconsin / Flash Flood Warnings in 2009
Flash Flood Warning 13, NWS Milwaukee, WI
NWS Milwaukee, WI issued this flash flood warning at Aug 9, 2009, 9:54 PM CDT for Green County, Lafayette County, Wisconsin. It was in force for 3 hr. No storm report in the archive falls inside the area while it was in force.
The area
The outline as issued.
The facts
- Issued
- Aug 9, 2009, 9:54 PM CDT (02:54 UTC)
- Expired
- Aug 10, 2009, 1:00 AM CDT
- In force
- 3 hr
- Issued by
- NWS Milwaukee, WI
- Area
- Storm-based polygon
- Flood severity
- None
Counties Green County, WI, Lafayette County, WI
The radar
The Milwaukee radar (KMKX), 109 km from the middle of the area, began a volume at 02:58 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.
The nearest sounding before it
Davenport, (KDVN), launched 00:00Z, 2.9 hours before the alert went out and 124 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
- 2860 J/kg
- Mixed-layer CIN
- -23 J/kg
- Mixed-layer LCL
- 928 m above ground
- 0-6 km bulk shear
- 33 kt
- 0-1 km storm-relative helicity
- 92 m²/s²
- 0-3 km storm-relative helicity
- 146 m²/s²
- Significant tornado parameter
- 1.8
- Supercell composite
- 9.6
The text
As transmitted, in the capitals the NWS used until 2016.
000 WGUS53 KMKX 100254 FFWMKX WIC045-065-100600- /O.NEW.KMKX.FF.W.0013.090810T0254Z-090810T0600Z/ /00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/ BULLETIN - EAS ACTIVATION REQUESTED FLASH FLOOD WARNING NATIONAL WEATHER SERVICE MILWAUKEE/SULLIVAN WI 954 PM CDT SUN AUG 9 2009 THE NATIONAL WEATHER SERVICE IN SULLIVAN HAS ISSUED A * FLASH FLOOD WARNING FOR... SOUTHERN GREEN COUNTY IN SOUTH CENTRAL WISCONSIN SOUTHERN LAFAYETTE COUNTY IN SOUTH CENTRAL WISCONSIN * UNTIL 100 AM CDT * AT 951 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED SLOW MOVING THUNDERSTORMS WITH VERY HEAVY RAINFALL ACROSS FAR NORTHERN ILLINOIS...MOVING TOWARD THE WARNED AREA. * RUNOFF FROM THIS EXCESSIVE RAINFALL WILL CAUSE FLASH FLOODING TO OCCUR. SOME LOCATIONS THAT WILL EXPERIENCE FLOODING INCLUDE... BRODHEAD...MONROE...BENTON...MONROE AIRPORT AND SHULLSBURG. RAINFALL AMOUNTS OF 1 TO 2 INCHES ARE POSSIBLE IN THE WARNED AREA. THIS RAIN...ON TOP OF SATURATED SOILS RESULTING FROM NUMEROUS ROUNDS IN THE PAST...WILL LIKELY RESULT IN MORE FLASH FLOODING. IN HILLY TERRAIN THERE ARE HUNDREDS OF LOW WATER CROSSINGS WHICH ARE POTENTIALLY DANGEROUS IN HEAVY RAIN. DO NOT ATTEMPT TO TRAVEL ACROSS FLOODED ROADS. FIND ALTERNATE ROUTES. IT ONLY TAKES A FEW INCHES OF SWIFTLY FLOWING WATER TO CARRY VEHICLES AWAY. LAT...LON 4270 8936 4249 8937 4251 9043 4263 9043 $$ BORGHOFF
3 follow-up statements
000 WGUS73 KMKX 100406 FFSMKX FLASH FLOOD STATEMENT NATIONAL WEATHER SERVICE MILWAUKEE/SULLIVAN WI 1106 PM CDT SUN AUG 9 2009 WIC045-065-100600- /O.CON.KMKX.FF.W.0013.000000T0000Z-090810T0600Z/ /00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/ GREEN WI-LAFAYETTE WI- 1106 PM CDT SUN AUG 9 2009 ...A FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 100 AM CDT FOR SOUTHERN LAFAYETTE AND SOUTHERN GREEN COUNTIES... *AT 1100 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR CONTINUED TO INDICATE A THUNDERSTORM PRODUCING HEAVY RAIN OVER THE WARNED AREA. THE HEAVIEST RAIN WAS OCCURRING IN GREEN COUNTY. SATURATED CONDITIONS FROM EARLIER HEAVY RAIN HAS DRAMATICALLY LOWERED THE THRESHOLD FOR FLASH FLOODING. *MANY LOCAL CREEKS IN THIS AREA CAN ONLY HANDLE ABOUT 1 INCH OF RAINFALL BEFORE FLOODING WOULD BE A CONCERN. *LOCATIONS IN THE WARNING INCLUDE BUT ARE NOT LIMITED TO MONROE AIRPORT...MONROE AND BRODHEAD. PRECAUTIONARY/PREPAREDNESS ACTIONS... BE ESPECIALLY CAUTIOUS AT NIGHT WHEN IT IS HARDER TO RECOGNIZE THE DANGERS OF FLOODING. IF FLASH FLOODING IS OBSERVED ACT QUICKLY. MOVE UP TO HIGHER GROUND TO ESCAPE FLOOD WATERS. DO NOT STAY IN AREAS SUBJECT TO FLOODING WHEN WATER BEGINS RISING. DO NOT DRIVE YOUR VEHICLE INTO AREAS WHERE THE WATER COVERS THE ROADWAY. THE WATER DEPTH MAY BE TOO GREAT TO ALLOW YOUR CAR TO CROSS SAFELY. MOVE TO HIGHER GROUND. && LAT...LON 4270 8936 4249 8937 4251 9043 4263 9043 $$ FRANKS
000 WGUS73 KMKX 100513 FFSMKX FLASH FLOOD STATEMENT NATIONAL WEATHER SERVICE MILWAUKEE/SULLIVAN WI 1213 AM CDT MON AUG 10 2009 WIC045-065-100600- /O.CON.KMKX.FF.W.0013.000000T0000Z-090810T0600Z/ /00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/ GREEN WI-LAFAYETTE WI- 1213 AM CDT MON AUG 10 2009 ...A FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 100 AM CDT FOR SOUTHERN LAFAYETTE AND SOUTHERN GREEN COUNTIES... AT 1208 AM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR CONTINUED TO INDICATE AN AREA OF RAIN MOVING FROM WEST TO EAST ACROSS LAFAYETTE AND GREEN COUNTIES. THE BACK EDGE OF THE RAIN SHOULD EXIT LAFAYETTE COUNTY AROUND 230 AM...AND GREEN COUNTY AROUND 330 AM. THE RAIN HAS TAPERED OFF FROM THE EARLIER HEAVY RAINFALL. AS A RESULT...ANY HIGH WATER OR FLASH FLOODING SHOULD BEGIN TO SUBSIDE OVER THE NEXT HOUR. ADDITIONAL RAINFALL OF UP TO ONE HALF INCH IS POSSIBLE OVER LAFAYETTE COUNTY...AND UP TO THREE QUARTERS OF AN INCH OVER GREEN COUNTY. LOCATIONS IN THE WARNING INCLUDE BUT ARE NOT LIMITED TO MONROE AIRPORT...MONROE AND BRODHEAD PRECAUTIONARY/PREPAREDNESS ACTIONS... EXCESSIVE RUNOFF FROM HEAVY RAINFALL WILL CAUSE FLOODING OF SMALL CREEKS AND STREAMS...COUNTRY ROADS...AS WELL AS FARMLAND ALONG THE BANKS OF CREEKS AND STREAMS. 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 4270 8936 4249 8937 4251 9043 4263 9043 $$ LAMERS
000 WGUS73 KMKX 100553 FFSMKX FLASH FLOOD STATEMENT NATIONAL WEATHER SERVICE MILWAUKEE/SULLIVAN WI 1253 AM CDT MON AUG 10 2009 WIC045-065-100601- /O.EXP.KMKX.FF.W.0013.000000T0000Z-090810T0600Z/ /00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/ GREEN WI-LAFAYETTE WI- 1253 AM CDT MON AUG 10 2009 ...THE FLASH FLOOD WARNING HAS EXPIRED FOR SOUTHERN LAFAYETTE AND SOUTHERN GREEN COUNTIES... THE HEAVY RAINFALL HAS ENDED...THEREFORE THE FLASH FLOOD WARNING WILL EXPIRE AT 1 AM. LAT...LON 4270 8936 4249 8937 4251 9043 4263 9043 $$ BORGHOFF
The office that day
Everything else NWS Milwaukee, WI issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Aug 9, 9:39 PM CDT | River Flood Watch | MKX | Green | 12 hr |
| Aug 9, 9:39 PM CDT | River Flood Watch | MKX | Green, Rock | 12 hr |
| Aug 9, 11:18 PM CDT | Flash Flood Warning | MKX | Rock | 102 min |
| Aug 9, 11:25 PM CDT | Severe Thunderstorm Warning | MKX | Rock | 50 min |
| Aug 10, 12:31 AM CDT | Areal Flood Advisory | MKX | Milwaukee, Waukesha | 71 min |
| Aug 10, 12:35 AM CDT | Special Marine Warning | MKX | 80 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; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.