Alert archive / Minnesota / Flash Flood Watches in 2011
Flash Flood Watch 1, NWS Twin Cities, MN
NWS Twin Cities, MN issued this flash flood watch at Jul 17, 2011, 1:27 PM CDT for 26 counties in Minnesota; 9 counties in Wisconsin. It took effect at Jul 17, 2011, 3:00 PM CDT. It was in force for 12 hr.
The area
The counties it named.
The facts
- Issued
- Jul 17, 2011, 1:27 PM CDT (18:27 UTC)
- In effect from
- Jul 17, 2011, 3:00 PM CDT
- Expired
- Jul 18, 2011, 2:37 AM CDT
- In force
- 12 hr
- Issued by
- NWS Twin Cities, MN
- Flood severity
- None
All 35 counties
Anoka County, MN, Benton County, MN, Carver County, MN, Chisago County, MN, Dakota County, MN, Freeborn County, MN, Goodhue County, MN, Hennepin County, MN, Isanti County, MN, Kanabec County, MN, Le Sueur County, MN, McLeod County, MN, Meeker County, MN, Mille Lacs County, MN, Morrison County, MN, Ramsey County, MN, Rice County, MN, Scott County, MN, Sherburne County, MN, Sibley County, MN, Stearns County, MN, Steele County, MN, Todd County, MN, Waseca County, MN, Washington County, MN, Wright County, MN, Barron County, WI, Chippewa County, WI, Dunn County, WI, Eau Claire County, WI, Pepin County, WI, Pierce County, WI, Polk County, WI, Rusk County, WI, Saint Croix County, WI
The radar
The Minneapolis radar (KMPX), 36 km from the middle of the area, began a volume at 18:27 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 12:00Z, 6.5 hours before the alert went out and 38 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
- 5378 J/kg
- Mixed-layer CIN
- -54 J/kg
- Mixed-layer LCL
- 662 m above ground
- 0-6 km bulk shear
- 17 kt
- 0-1 km storm-relative helicity
- 60 m²/s²
- 0-3 km storm-relative helicity
- 28 m²/s²
- Significant tornado parameter
- 0.7
- Supercell composite
- 3.8
The text
As transmitted, in the capitals the NWS used until 2016.
866 WGUS63 KMPX 171827 FFAMPX URGENT - IMMEDIATE BROADCAST REQUESTED FLOOD WATCH NATIONAL WEATHER SERVICE TWIN CITIES/CHANHASSEN MN 127 PM CDT SUN JUL 17 2011 ...VERY HEAVY RAIN POSSIBLE WITH DEVELOPING THUNDERSTORMS THIS AFTERNOON AND TONIGHT... .VERY HEAVY RAIN IS EXPECTED WITH THUNDERSTORMS THAT DEVELOP THIS AFTERNOON AND TONIGHT...AND COULD LEAD TO FLASH FLOODING. THUNDERSTORMS WILL CONTINUE TO DEVELOP OVER MUCH OF EASTERN MINNESOTA AND WEST CENTRAL WISCONSIN THIS AFTERNOON...AND A CLUSTER OF THUNDERSTORMS FROM NORTH DAKOTA AND NORTHWEST MINNESOTA COULD ALSO MOVE INTO THE AREA THIS EVENING. VERY UNSTABLE AIR WITH UNUSUALLY HIGH AMOUNTS OF MOISTURE REMAINS IN PLACE...AND WILL LIKELY PRODUCE TORRENTIAL RAINFALL RATES OF AROUND 2 INCHES AN HOUR. MUCH OF CENTRAL MINNESOTA AND WEST CENTRAL WISCONSIN ALREADY HAVE SATURATED SOILS AND AREA RIVERS AND STREAMS CONTINUE TO RUN HIGH BECAUSE OF FREQUENT HEAVY RAIN. THE MAIN FLOODING POTENTIAL WILL LIKELY BE EARLY TONIGHT...BUT IT IS POSSIBLE THAT ADDITIONAL STORMS COULD DEVELOP LATER TONIGHT AS WELL. THE FLASH FLOOD WATCH WILL BE IN EFFECT UNTIL MONDAY MORNING AND INCLUDES THE AREA ROUGHLY EAST OF A LINE...FROM LONG PRAIRIE... TO LITCHFIELD...MANKATO AND ALBERT LEA. MNZ042>045-049>053-058>063-066>070-076>078-084-085-093-WIZ014>016- 023>028-180230- /O.NEW.KMPX.FF.A.0001.110717T2000Z-110718T1200Z/ /00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/ TODD-MORRISON-MILLE LACS-KANABEC-STEARNS-BENTON-SHERBURNE-ISANTI- CHISAGO-MEEKER-WRIGHT-HENNEPIN-ANOKA-RAMSEY-WASHINGTON-MCLEOD- SIBLEY-CARVER-SCOTT-DAKOTA-LE SUEUR-RICE-GOODHUE-WASECA-STEELE- FREEBORN-POLK-BARRON-RUSK-ST. CROIX-PIERCE-DUNN-PEPIN-CHIPPEWA- EAU CLAIRE- INCLUDING THE CITIES OF...LONG PRAIRIE...LITTLE FALLS... PRINCETON...MORA...ST. CLOUD...FOLEY...ELK RIVER...CAMBRIDGE... CENTER CITY...LITCHFIELD...MONTICELLO...MINNEAPOLIS...BLAINE... ST. PAUL...STILLWATER...HUTCHINSON...GAYLORD...CHASKA... SHAKOPEE...BURNSVILLE...LE SUEUR...FARIBAULT...RED WING... WASECA...OWATONNA...ALBERT LEA...AMERY...BALSAM LAKE... RICE LAKE...BARRON...LADYSMITH...HUDSON...NEW RICHMOND... RIVER FALLS...PRESCOTT...MENOMONIE...BOYCEVILLE...DURAND... PEPIN...CHIPPEWA FALLS...BLOOMER...EAU CLAIRE...ALTOONA 127 PM CDT SUN JUL 17 2011 ...FLASH FLOOD WATCH IN EFFECT THROUGH MONDAY 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...CHISAGO...DAKOTA...FREEBORN...GOODHUE... HENNEPIN...ISANTI...KANABEC...LE SUEUR...MCLEOD...MEEKER... MILLE LACS...MORRISON...RAMSEY...RICE...SCOTT...SHERBURNE... SIBLEY...STEARNS...STEELE...TODD...WASECA...WASHINGTON AND WRIGHT. IN WISCONSIN...BARRON...CHIPPEWA...DUNN...EAU CLAIRE... PEPIN...PIERCE...POLK...RUSK AND ST. CROIX. * THROUGH MONDAY MORNING * VERY HEAVY RAIN WITH DEVELOPING THUNDERSTORMS COULD PRODUCE RAINFALL RATES OF NEAR 2 INCHES PER HOUR. * FLASH FLOODING OF LOW LYING AND URBAN AREAS INCLUDING HIGHWAYS AND UNDERPASSES...AS WELL AS ALONG SMALL CREEKS AND STREAMS...IS POSSIBLE OVERNIGHT. PRECAUTIONARY/PREPAREDNESS ACTIONS... 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. && $$
2 follow-up statements
370 WGUS63 KMPX 180509 FFAMPX FLOOD WATCH NATIONAL WEATHER SERVICE TWIN CITIES/CHANHASSEN MN 1209 AM CDT MON JUL 18 2011 ...VERY HEAVY RAIN POSSIBLE WITH THUNDERSTORMS EARLY THIS MORNING... .A FLASH FLOOD WATCH REMAINS IN EFFECT FOR PORTIONS OF CENTRAL AND SOUTHERN MINNESOTA AND WEST CENTRAL WISCONSIN THROUGH 7 AM MONDAY. THE WATCH AREA IS ROUGHLY EAST OF A LINE FROM LONG PRAIRIE... TO LITCHFIELD... MANKATO AND ALBERT LEA. THUNDERSTORMS WITH TORRENTIAL DOWNPOURS ARE POSSIBLE EARLY THIS MORNING. VERY UNSTABLE AIR WITH UNUSUALLY HIGH AMOUNTS OF MOISTURE REMAIN IN PLACE. RAINFALL RATES OF AROUND 2 INCHES AN HOUR ARE POSSIBLE IN THUNDERSTORMS THAT DEVELOP. CENTRAL MINNESOTA AND WEST CENTRAL WISCONSIN ALREADY HAVE SATURATED SOILS AND ANY RAINFALL THAT OCCUR WILL TURN INTO RUNOFF. IN ADDITION...AREA RIVERS AND STREAMS CONTINUE TO RUN HIGH BECAUSE OF FREQUENT HEAVY RAINS OVER THE PAST WEEK. MNZ042>045-049>053-058>063-066>070-076>078-084-085-093-WIZ014>016- 023>028-181200- /O.CON.KMPX.FF.A.0001.000000T0000Z-110718T1200Z/ /00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/ TODD-MORRISON-MILLE LACS-KANABEC-STEARNS-BENTON-SHERBURNE-ISANTI- CHISAGO-MEEKER-WRIGHT-HENNEPIN-ANOKA-RAMSEY-WASHINGTON-MCLEOD- SIBLEY-CARVER-SCOTT-DAKOTA-LE SUEUR-RICE-GOODHUE-WASECA-STEELE- FREEBORN-POLK-BARRON-RUSK-ST. CROIX-PIERCE-DUNN-PEPIN-CHIPPEWA- EAU CLAIRE- INCLUDING THE CITIES OF...LONG PRAIRIE...LITTLE FALLS... PRINCETON...MORA...ST. CLOUD...FOLEY...ELK RIVER...CAMBRIDGE... CENTER CITY...LITCHFIELD...MONTICELLO...MINNEAPOLIS...BLAINE... ST. PAUL...STILLWATER...HUTCHINSON...GAYLORD...CHASKA... SHAKOPEE...BURNSVILLE...LE SUEUR...FARIBAULT...RED WING... WASECA...OWATONNA...ALBERT LEA...AMERY...BALSAM LAKE... RICE LAKE...BARRON...LADYSMITH...HUDSON...NEW RICHMOND... RIVER FALLS...PRESCOTT...MENOMONIE...BOYCEVILLE...DURAND... PEPIN...CHIPPEWA FALLS...BLOOMER...EAU CLAIRE...ALTOONA 1209 AM CDT MON JUL 18 2011 ...FLASH FLOOD WATCH REMAINS IN EFFECT UNTIL 7 AM CDT MONDAY... THE FLASH FLOOD WATCH CONTINUES FOR * PORTIONS OF MINNESOTA AND WISCONSIN...INCLUDING THE FOLLOWING AREAS...IN MINNESOTA...ANOKA...BENTON...CARVER...CHISAGO... DAKOTA...FREEBORN...GOODHUE...HENNEPIN...ISANTI...KANABEC...LE SUEUR...MCLEOD...MEEKER...MILLE LACS...MORRISON...RAMSEY... RICE...SCOTT...SHERBURNE...SIBLEY...STEARNS...STEELE...TODD... WASECA...WASHINGTON AND WRIGHT. IN WISCONSIN...BARRON... CHIPPEWA...DUNN...EAU CLAIRE...PEPIN...PIERCE...POLK...RUSK AND ST. CROIX. * UNTIL 7 AM CDT MONDAY * VERY HEAVY RAIN WITH DEVELOPING THUNDERSTORMS COULD PRODUCE RAINFALL RATES OF NEAR 2 INCHES PER HOUR. * FLASH FLOODING OF LOW LYING AND URBAN AREAS INCLUDING HIGHWAYS AND UNDERPASSES...AS WELL AS ALONG SMALL CREEKS AND STREAMS... IS POSSIBLE OVERNIGHT. PRECAUTIONARY/PREPAREDNESS ACTIONS... 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. && $$
730 WGUS63 KMPX 180737 FFAMPX FLOOD WATCH NATIONAL WEATHER SERVICE TWIN CITIES/CHANHASSEN MN 237 AM CDT MON JUL 18 2011 ...FLASH FLOOD WATCH CANCELLED... .THE FLASH FLOOD WATCH FOR PORTIONS OF CENTRAL AND SOUTHERN MINNESOTA AND WEST CENTRAL WISCONSIN HAS BEEN CANCELLED. SCATTERED THUNDERSTORMS REMAIN POSSIBLE EARLY THIS MORNING... BUT THE THREAT FOR WIDESPREAD HEAVY RAIN HAS DIMINISHED. MNZ042>045-049>053-058>063-066>070-076>078-084-085-093-WIZ014>016- 023>028-180845- /O.CAN.KMPX.FF.A.0001.000000T0000Z-110718T1200Z/ /00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/ TODD-MORRISON-MILLE LACS-KANABEC-STEARNS-BENTON-SHERBURNE-ISANTI- CHISAGO-MEEKER-WRIGHT-HENNEPIN-ANOKA-RAMSEY-WASHINGTON-MCLEOD- SIBLEY-CARVER-SCOTT-DAKOTA-LE SUEUR-RICE-GOODHUE-WASECA-STEELE- FREEBORN-POLK-BARRON-RUSK-ST. CROIX-PIERCE-DUNN-PEPIN-CHIPPEWA- EAU CLAIRE- INCLUDING THE CITIES OF...LONG PRAIRIE...LITTLE FALLS... PRINCETON...MORA...ST. CLOUD...FOLEY...ELK RIVER...CAMBRIDGE... CENTER CITY...LITCHFIELD...MONTICELLO...MINNEAPOLIS...BLAINE... ST. PAUL...STILLWATER...HUTCHINSON...GAYLORD...CHASKA... SHAKOPEE...BURNSVILLE...LE SUEUR...FARIBAULT...RED WING... WASECA...OWATONNA...ALBERT LEA...AMERY...BALSAM LAKE... RICE LAKE...BARRON...LADYSMITH...HUDSON...NEW RICHMOND... RIVER FALLS...PRESCOTT...MENOMONIE...BOYCEVILLE...DURAND... PEPIN...CHIPPEWA FALLS...BLOOMER...EAU CLAIRE...ALTOONA 237 AM CDT MON JUL 18 2011 ...FLASH FLOOD WATCH IS CANCELLED... THE FLASH FLOOD WATCH FOR PORTIONS OF CENTRAL AND SOUTHERN MINNESOTA AND WEST CENTRAL WISCONSIN HAS BEEN CANCELLED. SCATTERED THUNDERSTORMS REMAIN POSSIBLE EARLY THIS MORNING... BUT THE THREAT FOR WIDESPREAD HEAVY RAIN HAS DIMINISHED. $$ RAH
The office that day
Everything else NWS Twin Cities, MN issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jul 17, 12:29 PM CDT | Special Weather Statement | MPX | Chippewa, Kandiyohi | 61 min |
Nearby
Flash Flood Watches in Minnesota, 2011Flash Flood Watches in Wisconsin, 2011Every flash flood watch in 2011
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.