Flash Flood Watch 7, NWS Twin Cities, MN

Issued

Sep 20, 2007, 1:04 PM CDT (18:04 UTC)

Expired

Sep 21, 2007, 7:00 AM CDT

In force

18 hr

Issued by

NWS Twin Cities, MN

Flood severity

None

The Minneapolis radar (KMPX), 63 km from the middle of the area, began a volume at 18:03 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.

000 
WGUS63 KMPX 201804
FFAMPX

URGENT - IMMEDIATE BROADCAST REQUESTED
FLOOD WATCH
NATIONAL WEATHER SERVICE TWIN CITIES/CHANHASSEN MN
104 PM CDT THU SEP 20 2007

...HEAVY RAIN FOR MUCH OF CENTRAL MINNESOTA THIS AFTERNOON AND
TONIGHT...

.A LARGE AREA OF RAIN AND THUNDERSTORMS REMAINS OVER CENTRAL
MINNESOTA THIS AFTERNOON. FURTHER DEVELOPMENT IS ANTICIPATED
ACROSS THE WATCH AREA LATER THIS AFTERNOON AND OVERNIGHT. THE
AREA NORTH OF A LINE FROM NEAR GRANITE FALLS...LAKEVILLE AND
ELLSWORTH WISCONSIN ARE MOST LIKELY TO SEE TORRENTIAL RAINS DURING
THE WATCH PERIOD. 

RAINFALL RATES ASSOCIATED WITH THE HEAVIER STORMS WILL RANGE FROM
1 TO 2 INCHES AN HOUR AS THEY MOVE THROUGH. THE GROUND REMAINS
SATURATED FROM THIS MORNINGS 1 TO 4 INCHES OF RAIN THAT FELL
ACROSS MUCH OF CENTRAL MINNESOTA. AREAS IN EAST CENTRAL MINNESOTA
AND WEST CENTRAL WISCONSIN REMAIN MOIST FROM RECENT RAINFALL. ANY
FURTHER RAIN WILL CAUSE RAPID RUNOFF THAT MAY CAUSE FLASH FLOODING
OR RAPID RISES ALONG SOME RIVERS AND STREAMS.

MNZ041>045-047>070-WIZ014-023-024-210215-
/O.NEW.KMPX.FF.A.0007.070920T1804Z-070921T1200Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
DOUGLAS-TODD-MORRISON-MILLE LACS-KANABEC-STEVENS-POPE-STEARNS-
BENTON-SHERBURNE-ISANTI-CHISAGO-LAC QUI PARLE-SWIFT-CHIPPEWA-
KANDIYOHI-MEEKER-WRIGHT-HENNEPIN-ANOKA-RAMSEY-WASHINGTON-
YELLOW MEDICINE-RENVILLE-MCLEOD-SIBLEY-CARVER-SCOTT-DAKOTA-POLK-
ST. CROIX-PIERCE-
INCLUDING THE CITIES OF...ALEXANDRIA...LONG PRAIRIE...
LITTLE FALLS...PRINCETON...MORA...MORRIS...GLENWOOD...ST. CLOUD...
FOLEY...ELK RIVER...CAMBRIDGE...CENTER CITY...MADISON...BENSON...
MONTEVIDEO...WILLMAR...LITCHFIELD...MONTICELLO...MINNEAPOLIS...
BLAINE...ST. PAUL...STILLWATER...GRANITE FALLS...OLIVIA...
HUTCHINSON...GAYLORD...CHASKA...SHAKOPEE...BURNSVILLE...AMERY...
BALSAM LAKE...HUDSON...NEW RICHMOND...RIVER FALLS...PRESCOTT
104 PM CDT THU SEP 20 2007

...FLASH FLOOD WATCH IN EFFECT THROUGH FRIDAY MORNING...

THE NATIONAL WEATHER SERVICE IN TWIN CITIES/CHANHASSEN HAS ISSUED
A

* FLASH FLOOD WATCH FOR PORTIONS OF MINNESOTA AND WISCONSIN...
  INCLUDING THE FOLLOWING AREAS...IN MINNESOTA...ANOKA...
  BENTON...CARVER...CHIPPEWA...CHISAGO...DAKOTA...DOUGLAS...
  HENNEPIN...ISANTI...KANABEC...KANDIYOHI...LAC QUI PARLE...
  MCLEOD...MEEKER...MILLE LACS...MORRISON...POPE...RAMSEY...
  RENVILLE...SCOTT...SHERBURNE...SIBLEY...STEARNS...STEVENS...
  SWIFT...TODD...WASHINGTON...WRIGHT AND YELLOW MEDICINE. IN 
  WISCONSIN...PIERCE...POLK AND ST. CROIX.

* THROUGH FRIDAY MORNING

* A LARGE AREA OF THUNDERSTORMS REMAINS OVER CENTRAL MINNESOTA
  THIS AFTERNOON. FURTHER DEVELOPMENT IS ANTICIPATED ACROSS THE
  WATCH AREA LATER THIS AFTERNOON AND OVERNIGHT. THE AREA NORTH OF
  A LINE FROM NEAR GRANITE FALLS...LAKEVILLE AND ELLSWORTH
  WISCONSIN ARE MOST LIKELY TO SEE TORRENTIAL RAINS DURING THE
  WATCH PERIOD.

* RAINFALL RATES ASSOCIATED WITH THE HEAVIER STORMS WILL RANGE
  FROM 1 TO 2 INCHES AN HOUR AS THE STORMS MOVE THROUGH. WITH
  NEARLY SATURATED GROUND FROM THIS MORNINGS RAIN...AND FROM
  RECENT RAINS THAT HAVE FALLEN ACROSS MUCH OF EAST CENTRAL
  MINNESOTA AND WEST CENTRAL WISCONSIN. ANY FURTHER RAIN WILL
  CAUSE RAPID RUNOFF THAT MAY CAUSE FLASH FLOODING OR RAPID RISES
  ALONG SOME RIVERS AND STREAMS.

A FLASH FLOOD WATCH MEANS THAT CONDITIONS MAY DEVELOP THAT LEAD
TO FLASH FLOODING. FLASH FLOODING IS A VERY DANGEROUS SITUATION.

YOU SHOULD MONITOR LATER FORECASTS AND BE PREPARED TO TAKE ACTION
SHOULD FLASH FLOOD WARNINGS BE ISSUED.

$$
DWE

000 
WGUS63 KMPX 210516
FFAMPX

FLOOD WATCH
NATIONAL WEATHER SERVICE TWIN CITIES/CHANHASSEN MN
1216 AM CDT FRI SEP 21 2007

...HEAVY RAIN FOR MUCH OF CENTRAL MINNESOTA FOR THE REST OF THE
NIGHT...

.ADDITIONAL THUNDERSTORMS ARE EXPECTED TO DEVELOP OVER WESTERN AND
PARTS OF CENTRAL MINNESOTA OVERNIGHT...AFFECTING AREAS THAT SAW
HEAVY RAIN ON THURSDAY. PORTIONS OF THE AREA NORTH OF A LINE FROM
GRANITE FALLS TO WILLMAR TO THE TWIN CITIES SAW AN ESTIMATED 4 TO
6 INCHES OF RAIN YESTERDAY...AND ADDITIONAL HEAVY RAINS WILL ONLY
EXACERBATE THE FLOODING THREAT DUE TO SATURATED GROUND CONDITIONS.

MNZ041>045-047>070-WIZ014-023-024-211200-
/O.CON.KMPX.FF.A.0007.000000T0000Z-070921T1200Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
DOUGLAS-TODD-MORRISON-MILLE LACS-KANABEC-STEVENS-POPE-STEARNS-
BENTON-SHERBURNE-ISANTI-CHISAGO-LAC QUI PARLE-SWIFT-CHIPPEWA-
KANDIYOHI-MEEKER-WRIGHT-HENNEPIN-ANOKA-RAMSEY-WASHINGTON-
YELLOW MEDICINE-RENVILLE-MCLEOD-SIBLEY-CARVER-SCOTT-DAKOTA-POLK-
ST. CROIX-PIERCE-
INCLUDING THE CITIES OF...ALEXANDRIA...LONG PRAIRIE...
LITTLE FALLS...PRINCETON...MORA...MORRIS...GLENWOOD...ST. CLOUD...
FOLEY...ELK RIVER...CAMBRIDGE...CENTER CITY...MADISON...BENSON...
MONTEVIDEO...WILLMAR...LITCHFIELD...MONTICELLO...MINNEAPOLIS...
BLAINE...ST. PAUL...STILLWATER...GRANITE FALLS...OLIVIA...
HUTCHINSON...GAYLORD...CHASKA...SHAKOPEE...BURNSVILLE...AMERY...
BALSAM LAKE...HUDSON...NEW RICHMOND...RIVER FALLS...PRESCOTT
1216 AM CDT FRI SEP 21 2007

...FLASH FLOOD WATCH REMAINS IN EFFECT UNTIL 7 AM CDT THIS
MORNING...

THE FLASH FLOOD WATCH CONTINUES FOR

* PORTIONS OF MINNESOTA AND WISCONSIN...INCLUDING THE FOLLOWING 
  AREAS...IN MINNESOTA...ANOKA...BENTON...CARVER...CHIPPEWA...
  CHISAGO...DAKOTA...DOUGLAS...HENNEPIN...ISANTI...KANABEC...
  KANDIYOHI...LAC QUI PARLE...MCLEOD...MEEKER...MILLE LACS...
  MORRISON...POPE...RAMSEY...RENVILLE...SCOTT...SHERBURNE...
  SIBLEY...STEARNS...STEVENS...SWIFT...TODD...WASHINGTON...
  WRIGHT AND YELLOW MEDICINE. IN WISCONSIN...PIERCE...POLK AND 
  ST. CROIX.

* UNTIL 7 AM CDT THIS MORNING

* A LARGE AREA OF THUNDERSTORMS REMAINS OVER CENTRAL MINNESOTA 
  THIS AFTERNOON. FURTHER DEVELOPMENT IS ANTICIPATED ACROSS THE 
  WATCH AREA LATER THIS AFTERNOON AND OVERNIGHT. THE AREA NORTH 
  OF A LINE FROM NEAR GRANITE FALLS...LAKEVILLE AND ELLSWORTH 
  WISCONSIN ARE MOST LIKELY TO SEE TORRENTIAL RAINS DURING THE 
  WATCH PERIOD. 

* ADDITIONAL THUNDERSTORMS ARE EXPECTED TO DEVELOP OVER WESTERN AND
PARTS OF CENTRAL MINNESOTA OVERNIGHT...AFFECTING AREAS THAT SAW
HEAVY RAIN ON THURSDAY. PORTIONS OF THE AREA NORTH OF A LINE FROM
GRANITE FALLS TO WILLMAR TO THE TWIN CITIES SAW AN ESTIMATED 4 TO
6 INCHES OF RAIN YESTERDAY...AND ADDITIONAL HEAVY RAINS WILL ONLY
EXACERBATE THE FLOODING THREAT DUE TO SATURATED GROUND CONDITIONS.

A FLASH FLOOD WATCH MEANS THAT CONDITIONS MAY DEVELOP THAT LEAD
TO FLASH FLOODING. FLASH FLOODING IS A VERY DANGEROUS SITUATION.

YOU SHOULD MONITOR LATER FORECASTS AND BE PREPARED TO TAKE ACTION
SHOULD FLASH FLOOD WARNINGS BE ISSUED.

$$

KAT

Flash Flood Watches in Minnesota, 2007Flash Flood Watches in Wisconsin, 2007Every flash flood watch in 2007

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.