Alert archive / Minnesota / Flash Flood Warnings in 2009
Flash Flood Warning 4, NWS Twin Cities, MN
NWS Twin Cities, MN issued this flash flood warning at Aug 8, 2009, 1:01 AM CDT for 5 counties in Minnesota. It was in force for 4 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 8, 2009, 1:01 AM CDT (06:01 UTC)
- Expired
- Aug 8, 2009, 5:00 AM CDT
- In force
- 4 hr
- Issued by
- NWS Twin Cities, MN
- Area
- Storm-based polygon
- Flood severity
- None
Counties Carver County, MN, Dakota County, MN, Hennepin County, MN, Ramsey County, MN, Washington County, MN
The radar
The Minneapolis radar (KMPX), 19 km from the middle of the area, began a volume at 06:01 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
Minneapolis, MN (KMPX), launched 00:00Z, 6.0 hours before the alert went out and 21 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
- 1 J/kg
- Mixed-layer CIN
- 0 J/kg
- Mixed-layer LCL
- 517 m above ground
- 0-6 km bulk shear
- 43 kt
- 0-1 km storm-relative helicity
- 183 m²/s²
- 0-3 km storm-relative helicity
- 341 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.2
The text
As transmitted, in the capitals the NWS used until 2016.
000 WGUS53 KMPX 080601 FFWMPX MNC019-037-053-123-163-081000- /O.NEW.KMPX.FF.W.0004.090808T0601Z-090808T1000Z/ /00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/ BULLETIN - EAS ACTIVATION REQUESTED FLASH FLOOD WARNING NATIONAL WEATHER SERVICE TWIN CITIES/CHANHASSEN MN 101 AM CDT SAT AUG 8 2009 THE NATIONAL WEATHER SERVICE IN THE TWIN CITIES HAS ISSUED A * FLASH FLOOD WARNING FOR... EASTERN CARVER COUNTY IN EAST CENTRAL MINNESOTA NORTHERN DAKOTA COUNTY IN EAST CENTRAL MINNESOTA SOUTHERN HENNEPIN COUNTY IN EAST CENTRAL MINNESOTA SOUTHERN RAMSEY COUNTY IN EAST CENTRAL MINNESOTA SOUTHERN WASHINGTON COUNTY IN EAST CENTRAL MINNESOTA * UNTIL 500 AM CDT * AT 1258 AM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED SLOW MOVING THUNDERSTORMS WITH VERY HEAVY RAINFALL ACROSS THE WARNED AREA...AND ESTIMATED THAT 2 INCHES OF RAIN HAS FALLEN SINCE MIDNIGHT ACROSS THE SOUTHERN TWIN CITIES METRO AREA. * RUNOFF FROM THIS EXCESSIVE RAINFALL WILL CAUSE FLASH FLOODING TO OCCUR. SOME LOCATIONS THAT WILL EXPERIENCE FLOODING INCLUDE... MINNEAPOLIS...ST PAUL...BAYPORT...BLOOMINGTON...CHANHASSEN... CHASKA...COTTAGE GROVE...DEEPHAVEN...EAGAN...EDEN PRAIRIE...EDINA...EXCELSIOR...FALCON HEIGHTS AND GOLDEN VALLEY. PRECAUTIONARY/PREPAREDNESS ACTIONS... ADDITIONAL RAINFALL AMOUNTS OF 2 TO 3 ARE POSSIBLE IN THE WARNED AREA IN THE NEXT 3 HOURS. 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 4504 9377 4503 9276 4481 9277 4482 9377 $$ MPG
1 follow-up statement
000 WGUS73 KMPX 080733 FFSMPX FLASH FLOOD STATEMENT NATIONAL WEATHER SERVICE TWIN CITIES/CHANHASSEN MN 233 AM CDT SAT AUG 8 2009 MNC019-037-053-123-163-081000- /O.CON.KMPX.FF.W.0004.000000T0000Z-090808T1000Z/ /00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/ WASHINGTON MN-HENNEPIN MN-RAMSEY MN-CARVER MN-DAKOTA MN- 233 AM CDT SAT AUG 8 2009 ...FLASH FLOOD WARNING REMAINS IN EFFECT FOR NORTHERN DAKOTA... EASTERN CARVER...SOUTHERN RAMSEY...SOUTHERN HENNEPIN AND SOUTHERN WASHINGTON COUNTIES UNTIL 500 AM CDT... AT 225 AM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED THAT HEAVY RAIN HAD TEMPORARILY MOVED SOUTH OF THE AREA BUT MORE THUNDERSTORMS WERE MOVING IN FROM THE WEST. THESE THUNDERSTORMS COULD PRODUCE ANOTHER 1 INCH...TO AS MUCH AS 2 INCHES OF RAIN THROUGH 5 AM. A LINE OF THUNDERSTORMS WAS PRODUCING VERY HEAVY RAINFALL IN THE WARNED AREA. RUNOFF FROM THIS EXCESSIVE RAINFALL WILL CAUSE FLASH FLOODING TO OCCUR. SOME LOCATIONS THAT WILL EXPERIENCE FLOODING INCLUDE...MINNEAPOLIS...ST PAUL...BAYPORT...BLOOMINGTON...CHANHASSEN...CHASKA...COTTAGE GROVE...CRYSTAL...DEEPHAVEN...EAGAN...EDEN PRAIRIE...EDINA...EXCELSIOR...FALCON HEIGHTS...GOLDEN VALLEY...HOPKINS...INDEPENDENCE...INVER GROVE HEIGHTS...LAKE ELMO...LILYDALE...LITTLE CANADA...LONG LAKE...MAPLE PLAIN...MAPLEWOOD...MEDINA AND MENDOTA. PRECAUTIONARY/PREPAREDNESS ACTIONS... THERE HAVE BEEN NUMEROUS REPORTS OF STREET FLOODING IN EASTERN CARVER COUNTY. BE ESPECIALLY CAUTIOUS AT NIGHT WHEN IT IS HARDER TO RECOGNIZE THE DANGERS OF FLOODING. IF FLOODING IS OBSERVED...ACT QUICKLY. DO NOT ENTER THE WATER. TURN AROUND AND MOVE UP TO HIGHER GROUND. DO NOT STAY IN AREAS SUBJECT TO FLOODING WHEN WATER BEGINS RISING. DO NOT DRIVE YOUR VEHICLE INTO AREAS WHERE THE WATER COVERS THE ROADWAY. THE WATER DEPTH MAY BE TOO GREAT TO ALLOW YOUR CAR TO CROSS SAFELY. && LAT...LON 4504 9377 4503 9276 4481 9277 4482 9377 $$ JPR
The office that day
Everything else NWS Twin Cities, MN issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Aug 7, 10:39 PM CDT | Special Weather Statement | MPX | Sibley | 51 min |
| Aug 7, 11:04 PM CDT | Special Weather Statement | MPX | Renville | 26 min |
| Aug 8, 12:24 AM CDT | Areal Flood Advisory | MPX | Anoka, Carver, Dakota, Hennepin, McLeod, Ramsey and 3 more | 3 hr |
| Aug 8, 12:28 AM CDT | Areal Flood Advisory | MPX | Anoka, Carver, Dakota, Hennepin, McLeod, Ramsey and 3 more | 3 hr |
| Aug 8, 1:48 AM CDT | Flash Flood Warning | MPX | Carver, Dakota, Scott, Washington | 4 hr |
| Aug 8, 4:06 AM CDT | Flash Flood Watch | MPX | Anoka, Carver, Chippewa, Dakota, Goodhue, Hennepin and 14 more | 19 hr |
| Aug 8, 4:11 AM CDT | Severe Thunderstorm Warning | MPX | Meeker, Sherburne, Stearns, Wright | 38 min |
| Aug 8, 4:19 AM CDT | Heat Advisory | MPX | Blue Earth, Brown, Carver, Dakota, Faribault, Freeborn and 14 more | 14 hr |
| Aug 8, 5:02 AM CDT | Areal Flood Advisory | MPX | Benton, Mille Lacs, Sherburne, Stearns, Wright | 3 hr |
| Aug 8, 5:29 AM CDT | Special Weather Statement | MPX | Benton | 61 min |
| Aug 8, 8:06 AM CDT | Severe Thunderstorm Warning | MPX | Renville | 39 min |
| Aug 8, 9:32 AM CDT | Special Weather Statement | MPX | Hennepin, Ramsey | 43 min |
| Aug 8, 9:43 AM CDT | Flash Flood Warning | MPX | Anoka, Hennepin, Wright | 3 hr |
| Aug 8, 3:46 PM CDT | Severe Thunderstorm Warning | MPX | Brown, Redwood | 28 min |
Nearby
Flash Flood Warnings in Minnesota, 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.