Alert archive / Iowa / Flash Flood Watches in 2007
Flash Flood Watch 7, NWS La Crosse, WI
NWS La Crosse, WI issued this flash flood watch at Aug 22, 2007, 4:18 AM CDT for 7 counties in Minnesota; 8 counties in Iowa; 5 counties in Wisconsin. It took effect at Aug 22, 2007, 7:00 PM CDT. It was in force for 20 hr.
The area
The counties it named.
The facts
- Issued
- Aug 22, 2007, 4:18 AM CDT (09:18 UTC)
- In effect from
- Aug 22, 2007, 7:00 PM CDT
- Expired
- Aug 23, 2007, 3:22 PM CDT
- In force
- 20 hr
- Issued by
- NWS La Crosse, WI
- Flood severity
- None
Counties Allamakee County, IA, Chickasaw County, IA, Clayton County, IA, Fayette County, IA, Floyd County, IA, Howard County, IA, Mitchell County, IA, Winneshiek County, IA, Dodge County, MN, Fillmore County, MN, Houston County, MN, Mower County, MN, Olmsted County, MN, Wabasha County, MN, Winona County, MN, Crawford County, WI, Grant County, WI, La Crosse County, WI, Richland County, WI, Vernon County, WI
The radar
The La Crosse radar (KARX), 63 km from the middle of the area, began a volume at 09:21 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, 9.3 hours before the alert went out and 209 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
- 0 J/kg
- Mixed-layer CIN
- No buoyant parcel
- Mixed-layer LCL
- 1298 m above ground
- 0-6 km bulk shear
- 65 kt
- 0-1 km storm-relative helicity
- 8 m²/s²
- 0-3 km storm-relative helicity
- 453 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- -0.0
The text
As transmitted, in the capitals the NWS used until 2016.
000 WGUS63 KARX 220918 FFAARX URGENT - IMMEDIATE BROADCAST REQUESTED FLOOD WATCH NATIONAL WEATHER SERVICE LA CROSSE WI 418 AM CDT WED AUG 22 2007 ...HEAVY RAINS POSSIBLE ACROSS THE AREA TONIGHT INTO THURSDAY MORNING... .A FRONTAL BOUNDARY JUST SOUTH OF THE AREA COMBINED WITH WARM AND MOIST AIR PUSHING NORTH OVER IT IS EXPECTED TO GENERATE ANOTHER ROUND OF THUNDERSTORMS TONIGHT. THE STORMS ARE EXPECTED TO DEVELOP WEST OF THE AREA AND THEN MOVE IN LATER IN THE EVENING AND DURING THE OVERNIGHT HOURS. THERE REMAINS SOME UNCERTAINTY WHERE THE HEAVIEST RAIN AXIS MAY SET UP...BUT IT COULD BE ANYWHERE FROM SOUTHEAST MINNESOTA AND WESTERN WISCONSIN TO NORTHEAST IOWA AND SOUTHWEST WISCONSIN. ADDITIONAL RAINFALLS OF 1 TO 3 INCHES WILL BE POSSIBLE TONIGHT INTO THURSDAY MORNING. GIVEN THE RECENT HEAVY RAINS...SIGNIFICANT DAMAGE AND HIGH RIVER LEVELS...ANY RAIN THAT FALLS TONIGHT INTO THURSDAY MORNING WILL RUNOFF QUICKLY AND COULD LEAD TO FLASH FLOODING ONCE AGAIN... ESPECIALLY IF THE RAINFALL RATES ARE HIGH. WE URGE RESIDENTS TO MONITOR WEATHER TRENDS TONIGHT AND IF HEAVY RAIN MATERIALIZES IN THEIR AREA...DO NOT TAKE CHANCES. MOVE TO HIGH GROUND ESPECIALLY IF FLOODING IS OBSERVED OR A WARNING IS ISSUED FOR YOUR AREA. IAZ008>011-018-019-029-030-MNZ079-086>088-094>096-WIZ041-053>055- 061-221730- /O.NEW.KARX.FF.A.0007.070823T0000Z-070823T1500Z/ /00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/ MITCHELL-HOWARD-WINNESHIEK-ALLAMAKEE-FLOYD-CHICKASAW-FAYETTE- CLAYTON-WABASHA-DODGE-OLMSTED-WINONA-MOWER-FILLMORE-HOUSTON- LA CROSSE-VERNON-CRAWFORD-RICHLAND-GRANT- INCLUDING THE CITIES OF...DECORAH...WAUKON...CHARLES CITY... OELWEIN...ROCHESTER...WINONA...AUSTIN...LA CROSSE...VIROQUA... PRAIRIE DU CHIEN...RICHLAND CENTER...PLATTEVILLE 418 AM CDT WED AUG 22 2007 ...FLASH FLOOD WATCH IN EFFECT FROM THIS EVENING THROUGH THURSDAY MORNING... THE NATIONAL WEATHER SERVICE IN LA CROSSE HAS ISSUED A * FLASH FLOOD WATCH FOR PORTIONS OF IOWA...SOUTHEAST MINNESOTA AND WISCONSIN...INCLUDING THE FOLLOWING AREAS...IN IOWA... ALLAMAKEE...CHICKASAW...CLAYTON...FAYETTE...FLOYD...HOWARD... MITCHELL AND WINNESHIEK. IN SOUTHEAST MINNESOTA...DODGE... FILLMORE...HOUSTON...MOWER...OLMSTED...WABASHA AND WINONA. IN WISCONSIN...CRAWFORD...GRANT...LA CROSSE...RICHLAND AND VERNON. * FROM THIS EVENING THROUGH THURSDAY MORNING * SHOWERS AND THUNDERSTORMS TONIGHT AND INTO THURSDAY MORNING COULD PRODUCE LOCALLY HEAVY RAINFALL. DUE TO RECENT HEAVY RAINS THE SOIL IS ALREADY WET. ANY ADDITIONAL HEAVY RAINFALL IS LIKELY TO RUN OFF AND LEAD TO THE POTENTIAL FOR FLASH FLOODING. * RUNOFF FROM THE HEAVY RAINS MAY LEAD TO FAST-FLOWING WATER OVER ROADS...PONDING OF WATER IN LOW LYING AREAS...AND SOIL EROSION OR MUD SLIDES IN HILLY TERRAIN. URBAN AREAS MAY ALSO EXPERIENCE CLOSED ROADS DUE TO ACCUMULATING WATER. 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. $$ RRS
7 follow-up statements
000 WGUS63 KARX 221630 FFAARX FLOOD WATCH NATIONAL WEATHER SERVICE LA CROSSE WI 1130 AM CDT WED AUG 22 2007 ...MORE RAIN MOVING IN... .A FRONTAL BOUNDARY ACROSS IOWA INTO NORTHERN ILLINOIS REMAINS THE FOCUS FOR THUNDERSTORM DEVELOPMENT AS WARM AND MOIST AIR TRIES TO PUSH NORTH. SHOWERS AND THUNDERSTORMS WERE ALREADY TRACKING ACROSS THE NORTHERN HALF OF IOWA AND ADDITIONAL DEVELOPMENT IS EXPECTED TONIGHT. THIS MAY LEAD TO SOME SIGNIFICANT RAINFALL OVER PARTS OF NORTHEAST IOWA AND SOUTHWEST WISCONSIN...AND PERHAPS ACROSS NEIGHBORING SECTIONS OF SOUTHERN MINNESOTA. GIVEN THE ALREADY SATURATED SOILS...RECENT DAMAGE AND HIGH RIVER LEVELS...ADDITIONAL FLASH FLOODING IS CERTAINLY A POSSIBILITY... ESPECIALLY TONIGHT. ONE TO THREE INCHES OF ADDITIONAL RAIN...WITH LOCALLY HIGHER AMOUNTS...IS CERTAINLY POSSIBLE BY THURSDAY MORNING. WE URGE RESIDENTS TO MONITOR WEATHER TRENDS TONIGHT. STAY ON HIGH GROUND AND MOVE TO HIGH GROUND ESPECIALLY IF FLOODING IS OBSERVED OR A WARNING IS ISSUED FOR YOUR AREA. IAZ008>011-018-019-029-030-MNZ079-086>088-094>096-WIZ041-053>055- 061-230030- /O.CON.KARX.FF.A.0007.070823T0000Z-070823T1500Z/ /00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/ MITCHELL-HOWARD-WINNESHIEK-ALLAMAKEE-FLOYD-CHICKASAW-FAYETTE- CLAYTON-WABASHA-DODGE-OLMSTED-WINONA-MOWER-FILLMORE-HOUSTON- LA CROSSE-VERNON-CRAWFORD-RICHLAND-GRANT- INCLUDING THE CITIES OF...DECORAH...WAUKON...CHARLES CITY... OELWEIN...ROCHESTER...WINONA...AUSTIN...LA CROSSE...VIROQUA... PRAIRIE DU CHIEN...RICHLAND CENTER...PLATTEVILLE 1130 AM CDT WED AUG 22 2007 ...FLASH FLOOD WATCH REMAINS IN EFFECT FROM 7 PM CDT THIS EVENING THROUGH THURSDAY MORNING... THE FLASH FLOOD WATCH CONTINUES FOR * PORTIONS OF IOWA...SOUTHEAST MINNESOTA AND WISCONSIN... INCLUDING THE FOLLOWING AREAS...IN IOWA...ALLAMAKEE... CHICKASAW...CLAYTON...FAYETTE...FLOYD...HOWARD...MITCHELL AND WINNESHIEK. IN SOUTHEAST MINNESOTA...DODGE...FILLMORE... HOUSTON...MOWER...OLMSTED...WABASHA AND WINONA. IN WISCONSIN... CRAWFORD...GRANT...LA CROSSE...RICHLAND AND VERNON. * FROM 7 PM CDT THIS EVENING THROUGH THURSDAY MORNING * SHOWERS AND THUNDERSTORMS THROUGH TONIGHT AND INTO THURSDAY MORNING COULD PRODUCE LOCALLY HEAVY RAINFALL. DUE TO RECENT HEAVY RAINS THE SOIL IS ALREADY SATURATED. ANY ADDITIONAL HEAVY RAINFALL IS LIKELY TO RUN OFF AND LEAD TO FLASH FLOODING. * RUNOFF FROM THE HEAVY RAINS MAY LEAD TO FAST-FLOWING WATER OVER ROADS...PONDING OF WATER IN LOW LYING AREAS...AND SOIL EROSION OR MUD SLIDES IN HILLY TERRAIN. URBAN AREAS MAY ALSO EXPERIENCE CLOSED ROADS DUE TO ACCUMULATING WATER. 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. $$ SHEA
000 WGUS63 KARX 222017 FFAARX FLOOD WATCH NATIONAL WEATHER SERVICE LA CROSSE WI 317 PM CDT WED AUG 22 2007 ...THE THREAT FOR HEAVY RAIN REMAINS IN PLACE... .SHOWERS AND THUNDERSTORMS HAVE BEEN MOVING INTO THE AREA FROM THE WEST THROUGH THE DAY. IT APPEARS SOME OF STORMS WILL PRODUCE HEAVY RAIN ACROSS PARTS OF NORTHEAST IOWA AND INTO SOUTHWEST WISCONSIN THROUGH THE EVENING HOURS WITH THE POSSIBILITY OF AN INCH OR TWO. ADDITIONAL THUNDERSTORM DEVELOPMENT COULD OCCUR TO THE WEST LATE TONIGHT AS WELL KEEPING THINGS WET WELL INTO THURSDAY MORNING... AND MAY ALSO AFFECT PARTS OF SOUTHERN MINNESOTA WITH SOME HEAVY RAIN. ALL IN ALL...THE THREAT FOR THUNDERSTORM DEVELOP REMAINS ACROSS THE FLASH FLOOD WATCH AREA THROUGH THE NIGHT SO IF YOUR AREA EXPERIENCES SIGNIFICANT AND RAPID RAINFALL...EXPECT FLASH FLOODING. WE URGE RESIDENTS TO MONITOR WEATHER TRENDS TONIGHT. STAY ON HIGH GROUND AND MOVE TO HIGH GROUND ESPECIALLY IF FLOODING IS OBSERVED OR A WARNING IS ISSUED FOR YOUR AREA. IAZ008>011-018-019-029-030-MNZ079-086>088-094>096-WIZ041-053>055- 061-230430- /O.CON.KARX.FF.A.0007.070823T0000Z-070823T1500Z/ /00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/ MITCHELL-HOWARD-WINNESHIEK-ALLAMAKEE-FLOYD-CHICKASAW-FAYETTE- CLAYTON-WABASHA-DODGE-OLMSTED-WINONA-MOWER-FILLMORE-HOUSTON- LA CROSSE-VERNON-CRAWFORD-RICHLAND-GRANT- INCLUDING THE CITIES OF...DECORAH...WAUKON...CHARLES CITY... OELWEIN...ROCHESTER...WINONA...AUSTIN...LA CROSSE...VIROQUA... PRAIRIE DU CHIEN...RICHLAND CENTER...PLATTEVILLE 317 PM CDT WED AUG 22 2007 ...FLASH FLOOD WATCH REMAINS IN EFFECT FROM 7 PM CDT THIS EVENING THROUGH THURSDAY MORNING... THE FLASH FLOOD WATCH CONTINUES FOR * PORTIONS OF IOWA...SOUTHEAST MINNESOTA AND WISCONSIN... INCLUDING THE FOLLOWING AREAS...IN IOWA...ALLAMAKEE... CHICKASAW...CLAYTON...FAYETTE...FLOYD...HOWARD...MITCHELL AND WINNESHIEK. IN SOUTHEAST MINNESOTA...DODGE...FILLMORE... HOUSTON...MOWER...OLMSTED...WABASHA AND WINONA. IN WISCONSIN... CRAWFORD...GRANT...LA CROSSE...RICHLAND AND VERNON. * FROM 7 PM CDT THIS EVENING THROUGH THURSDAY MORNING * SHOWERS AND THUNDERSTORMS THROUGH TONIGHT AND INTO THURSDAY MORNING COULD PRODUCE LOCALLY HEAVY RAINFALL. DUE TO RECENT HEAVY RAINS THE SOIL IS ALREADY SATURATED. ANY ADDITIONAL HEAVY RAINFALL IS LIKELY TO RUN OFF AND LEAD TO FLASH FLOODING. * RUNOFF FROM THE HEAVY RAINS MAY LEAD TO FAST-FLOWING WATER OVER ROADS...PONDING OF WATER IN LOW LYING AREAS...AND SOIL EROSION OR MUD SLIDES IN HILLY TERRAIN. URBAN AREAS MAY ALSO EXPERIENCE CLOSED ROADS DUE TO ACCUMULATING WATER. 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. $$ SHEA
000 WGUS63 KARX 230218 FFAARX FLOOD WATCH NATIONAL WEATHER SERVICE LA CROSSE WI 918 PM CDT WED AUG 22 2007 ...HEAVY RAIN POSSIBLE LATE TONIGHT AND THURSDAY MORNING... .SCATTERED SHOWERS AND THUNDERSTORMS WILL BE FOUND ACROSS SOUTHEAST MINNESOTA...NORTHEAST IOWA...AND WESTERN WISCONSIN THROUGH 4 AM...AND THEN THE PRECIPITATION WILL GRADUALLY BECOME MORE WIDESPREAD ACROSS THE AREA. HEAVY RAIN WILL BE A POSSIBILITY LATE TONIGHT AND THURSDAY MORNING...AND THIS MAY RESULT IN FLASH FLOODING. WE URGE RESIDENTS TO MONITOR WEATHER TRENDS DURING THE OVERNIGHT HOURS...AND BE PREPARED TO MOVE TO HIGHER GROUND IF A FLASH FLOOD WARNING IS ISSUED FOR YOUR AREA. IAZ008>011-018-019-029-030-MNZ079-086>088-094>096-WIZ041-053>055- 061-231030- /O.CON.KARX.FF.A.0007.000000T0000Z-070823T1500Z/ /00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/ MITCHELL-HOWARD-WINNESHIEK-ALLAMAKEE-FLOYD-CHICKASAW-FAYETTE- CLAYTON-WABASHA-DODGE-OLMSTED-WINONA-MOWER-FILLMORE-HOUSTON- LA CROSSE-VERNON-CRAWFORD-RICHLAND-GRANT- INCLUDING THE CITIES OF...DECORAH...WAUKON...CHARLES CITY... OELWEIN...ROCHESTER...WINONA...AUSTIN...LA CROSSE...VIROQUA... PRAIRIE DU CHIEN...RICHLAND CENTER...PLATTEVILLE 918 PM CDT WED AUG 22 2007 ...FLASH FLOOD WATCH REMAINS IN EFFECT THROUGH THURSDAY MORNING... THE FLASH FLOOD WATCH CONTINUES FOR * PORTIONS OF IOWA...SOUTHEAST MINNESOTA AND WISCONSIN... INCLUDING THE FOLLOWING AREAS...IN IOWA...ALLAMAKEE... CHICKASAW...CLAYTON...FAYETTE...FLOYD...HOWARD...MITCHELL AND WINNESHIEK. IN SOUTHEAST MINNESOTA...DODGE...FILLMORE... HOUSTON...MOWER...OLMSTED...WABASHA AND WINONA. IN WISCONSIN... CRAWFORD...GRANT...LA CROSSE...RICHLAND AND VERNON. * THROUGH THURSDAY MORNING * SCATTERED SHOWERS AND THUNDERSTORMS WILL BE FOUND ACROSS THE AREA THROUGH 4 AM THURSDAY MORNING...AND THEN BECOME MORE WIDESPREAD ACROSS THE AREA. DUE TO RECENT HEAVY RAINS THE SOIL IS ALREADY SATURATED. ANY ADDITIONAL HEAVY RAINFALL IS LIKELY TO RUN OFF AND LEAD TO FLASH FLOODING. * RUNOFF FROM THE HEAVY RAINS MAY LEAD TO FAST-FLOWING WATER OVER ROADS...PONDING OF WATER IN LOW LYING AREAS...AND SOIL EROSION OR MUD SLIDES IN HILLY TERRAIN. URBAN AREAS MAY ALSO EXPERIENCE CLOSED ROADS DUE TO ACCUMULATING WATER. 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. $$ BOYNE
000 WGUS63 KARX 230833 FFAARX URGENT - IMMEDIATE BROADCAST REQUESTED FLOOD WATCH NATIONAL WEATHER SERVICE LA CROSSE WI 333 AM CDT THU AUG 23 2007 ...HEAVY RAIN POSSIBLE TODAY... .ANOTHER ROUND OF SHOWERS AND THUNDERSTORMS IS EXPECTED TO SPREAD NORTHEAST ACROSS THE AREA TODAY. WITH A VERY MOIST AIRMASS OVER THE AREA...ANY SHOWERS AND STORMS ARE EXPECTED TO BE EFFICIENT RAIN PRODUCERS. HEAVY RAIN WILL BE POSSIBLE TODAY...AND THIS MAY RESULT IN FLASH FLOODING. WE URGE RESIDENTS TO MONITOR WEATHER TRENDS TODAY...AND BE PREPARED TO MOVE TO HIGHER GROUND IF A FLASH FLOOD WARNING IS ISSUED FOR YOUR AREA. IAZ008>011-018-019-029-030-MNZ079-086>088-094>096-WIZ041-053>055- 061-231645- /O.EXT.KARX.FF.A.0007.000000T0000Z-070824T0000Z/ /00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/ MITCHELL-HOWARD-WINNESHIEK-ALLAMAKEE-FLOYD-CHICKASAW-FAYETTE- CLAYTON-WABASHA-DODGE-OLMSTED-WINONA-MOWER-FILLMORE-HOUSTON- LA CROSSE-VERNON-CRAWFORD-RICHLAND-GRANT- INCLUDING THE CITIES OF...DECORAH...WAUKON...CHARLES CITY... OELWEIN...ROCHESTER...WINONA...AUSTIN...LA CROSSE...VIROQUA... PRAIRIE DU CHIEN...RICHLAND CENTER...PLATTEVILLE 333 AM CDT THU AUG 23 2007 ...FLASH FLOOD WATCH NOW IN EFFECT THROUGH THIS EVENING... THE FLASH FLOOD WATCH IS NOW IN EFFECT FOR * PORTIONS OF IOWA...SOUTHEAST MINNESOTA AND WISCONSIN... INCLUDING THE FOLLOWING AREAS...IN IOWA...ALLAMAKEE... CHICKASAW...CLAYTON...FAYETTE...FLOYD...HOWARD...MITCHELL AND WINNESHIEK. IN SOUTHEAST MINNESOTA...DODGE...FILLMORE... HOUSTON...MOWER...OLMSTED...WABASHA AND WINONA. IN WISCONSIN... CRAWFORD...GRANT...LA CROSSE...RICHLAND AND VERNON. * THROUGH THIS EVENING * SHOWERS AND THUNDERSTORMS ARE EXPECTED TO SPREAD ACROSS THE AREA THIS MORNING...THEN CONTINUE THROUGH THE AFTERNOON. ANY THUNDERSTORMS WILL BE CAPABLE OF PRODUCING HEAVY RAIN. DUE TO RECENT HEAVY RAINS THE SOIL IS ALREADY SATURATED. ANY ADDITIONAL HEAVY RAINFALL IS LIKELY TO RUN OFF AND LEAD TO FLASH FLOODING. * RUNOFF FROM THE HEAVY RAINS MAY LEAD TO FAST-FLOWING WATER OVER ROADS...PONDING OF WATER IN LOW LYING AREAS...AND SOIL EROSION OR MUD SLIDES IN HILLY TERRAIN. URBAN AREAS MAY ALSO EXPERIENCE CLOSED ROADS DUE TO PONDING OF WATER. 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. $$ RRS
000 WGUS63 KARX 231540 FFAARX FLOOD WATCH NATIONAL WEATHER SERVICE LA CROSSE WI 1040 AM CDT THU AUG 23 2007 ...HEAVY RAIN POSSIBLE THIS AFTERNOON AND EVENING... .A LOW PRESSURE WILL MOVE NORTHEAST ACROSS THE AREA THIS AFTERNOON AND EVENING. THIS SYSTEM WILL BRING WITH IT ANOTHER ROUND OF SHOWERS AND THUNDERSTORMS ACROSS SOUTHEAST MINNESOTA...NORTHEAST IOWA...AND WEST CENTRAL AND SOUTHWEST WISCONSIN. THESE SHOWERS AND THUNDERSTORMS WILL BE CAPABLE OF PRODUCING VERY HEAVY RAIN IN SHORT PERIOD OF TIME...AND THIS MAY RESULT IN FLASH FLOODING. WE URGE RESIDENTS TO CONTINUE TO MONITOR WEATHER TRENDS THIS AFTERNOON AND EVENING...AND BE PREPARED TO MOVE TO HIGHER GROUND IF A FLASH FLOOD WARNING IS ISSUED FOR YOUR AREA. IAZ008>011-018-019-029-030-MNZ079-086>088-094>096-WIZ041-053>055- 061-232345- /O.CON.KARX.FF.A.0007.000000T0000Z-070824T0000Z/ /00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/ MITCHELL-HOWARD-WINNESHIEK-ALLAMAKEE-FLOYD-CHICKASAW-FAYETTE- CLAYTON-WABASHA-DODGE-OLMSTED-WINONA-MOWER-FILLMORE-HOUSTON- LA CROSSE-VERNON-CRAWFORD-RICHLAND-GRANT- INCLUDING THE CITIES OF...DECORAH...WAUKON...CHARLES CITY... OELWEIN...ROCHESTER...WINONA...AUSTIN...LA CROSSE...VIROQUA... PRAIRIE DU CHIEN...RICHLAND CENTER...PLATTEVILLE 1040 AM CDT THU AUG 23 2007 ...FLASH FLOOD WATCH REMAINS IN EFFECT UNTIL 7 PM CDT THIS EVENING... THE FLASH FLOOD WATCH CONTINUES FOR * PORTIONS OF IOWA...SOUTHEAST MINNESOTA AND WISCONSIN... INCLUDING THE FOLLOWING AREAS...IN IOWA...ALLAMAKEE... CHICKASAW...CLAYTON...FAYETTE...FLOYD...HOWARD...MITCHELL AND WINNESHIEK. IN SOUTHEAST MINNESOTA...DODGE...FILLMORE... HOUSTON...MOWER...OLMSTED...WABASHA AND WINONA. IN WISCONSIN... CRAWFORD...GRANT...LA CROSSE...RICHLAND AND VERNON. * UNTIL 7 PM CDT THIS EVENING * SHOWERS AND THUNDERSTORMS ARE EXPECTED TO SPREAD ACROSS THE AREA THIS AFTERNOON...THEN CONTINUE INTO THE EVENING. THE SHOWERS AND THUNDERSTORMS WILL BE CAPABLE OF PRODUCING HEAVY RAIN. DUE TO RECENT HEAVY RAINS THE SOIL IS ALREADY SATURATED. ANY ADDITIONAL HEAVY RAINFALL IS LIKELY TO RUN OFF AND LEAD TO FLASH FLOODING. * RUNOFF FROM THE HEAVY RAINS MAY LEAD TO FAST-FLOWING WATER OVER ROADS...PONDING OF WATER IN LOW LYING AREAS...AND SOIL EROSION OR MUD SLIDES IN HILLY TERRAIN. URBAN AREAS MAY ALSO EXPERIENCE CLOSED ROADS DUE TO PONDING OF WATER. 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. $$ BOYNE
000 WGUS63 KARX 231711 FFAARX FLOOD WATCH NATIONAL WEATHER SERVICE LA CROSSE WI 1211 PM CDT THU AUG 23 2007 ...HEAVY RAIN THREAT SHIFTING SOUTH... .A SWATH OF RAIN MOVING THROUGH THE REGION TODAY HAS BEEN WEAKENING AS IT APPROACHES BUT COULD BRING SOME HALF TO ONE INCH RAINFALL TOTALS OVER PARTS OF NORTHEAST IOWA AND SOUTHWEST WISCONSIN. A LOW PRESSURE AREA FROM THE PLAINS WILL MOVE THIS WAY LATER THIS AFTERNOON AND TONIGHT AND COULD HELP TRIGGER MORE THUNDERSTORMS... ESPECIALLY OVER NORTHEAST IOWA AND SOUTHWEST WISCONSIN. EVEN THOUGH THE HEAVY RAIN THREAT APPEARS TO BE SHIFTING SOUTH WITH EACH PASSING WEATHER SYSTEM...WE URGE RESIDENTS TO REMAIN ALERT IN CASE HEAVY RAIN DOES DEVELOP. GIVEN THE SATURATED SOILS AND UNSTABLE HILLSIDES IN MANY AREAS...FAIRLY MINIMAL RAINS COULD CREATE MORE FLASH FLOODING AND MUD SLIDES. BE PREPARED TO MOVE TO HIGHER GROUND IF A FLASH FLOOD WARNING IS ISSUED FOR YOUR AREA. IAZ008>010-018-019-MNZ079-086>088-094>096-WIZ041-231815- /O.CAN.KARX.FF.A.0007.000000T0000Z-070824T0000Z/ /00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/ MITCHELL-HOWARD-WINNESHIEK-FLOYD-CHICKASAW-WABASHA-DODGE-OLMSTED- WINONA-MOWER-FILLMORE-HOUSTON-LA CROSSE- INCLUDING THE CITIES OF...DECORAH...CHARLES CITY...ROCHESTER... WINONA...AUSTIN...LA CROSSE 1211 PM CDT THU AUG 23 2007 ...FLASH FLOOD WATCH IS CANCELLED... THE FLASH FLOOD WATCH FOR PARTS OF NORTHEAST IOWA...SOUTHEAST MINNESOTA AND WEST CENTRAL WISCONSIN HAS BEEN CANCELLED. ALTHOUGH RAIN MAY STILL FALL OR DEVELOP IN THE AREA...IT APPEARS THE HEAVIER AMOUNTS WILL BE SOUTH OF THE REGION. $$ IAZ011-029-030-WIZ053>055-061-240000- /O.CON.KARX.FF.A.0007.000000T0000Z-070824T0000Z/ /00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/ ALLAMAKEE-FAYETTE-CLAYTON-VERNON-CRAWFORD-RICHLAND-GRANT- INCLUDING THE CITIES OF...WAUKON...OELWEIN...VIROQUA... PRAIRIE DU CHIEN...RICHLAND CENTER...PLATTEVILLE 1211 PM CDT THU AUG 23 2007 ...FLASH FLOOD WATCH REMAINS IN EFFECT UNTIL 7 PM CDT THIS EVENING... THE FLASH FLOOD WATCH CONTINUES FOR * PORTIONS OF NORTHEAST IOWA AND SOUTHWEST WISCONSIN...INCLUDING THE FOLLOWING AREAS...IN NORTHEAST IOWA...ALLAMAKEE...CLAYTON AND FAYETTE. IN SOUTHWEST WISCONSIN...CRAWFORD...GRANT... RICHLAND AND VERNON. * UNTIL 7 PM CDT THIS EVENING * SHOWERS AND THUNDERSTORMS WILL PASS THROUGH THE AREA THIS AFTERNOON WITH ADDITIONAL DEVELOPMENT STILL POSSIBLE TONIGHT. STORMS ARE STILL CAPABLE OF PRODUCING HEAVY RAIN ALTHOUGH THE CHANCES OF HEAVY RAIN CONTINUE TO MOVE SOUTH IN TIME. * RUNOFF FROM THE RAINS MAY LEAD TO FAST-FLOWING WATER OVER ROADS...PONDING OF WATER IN LOW LYING AREAS...AND SOIL EROSION OR MUD SLIDES IN HILLY TERRAIN. URBAN AREAS MAY ALSO EXPERIENCE CLOSED ROADS DUE TO PONDING OF WATER. A FLASH FLOOD WATCH MEANS THAT CONDITIONS MAY DEVELOP THAT LEAD TO FLASH FLOODING. FLASH FLOODING IS A VERY DANGEROUS SITUATION. YOU SHOULD MONITOR LATER FORECASTS AND BE PREPARED TO TAKE ACTION SHOULD FLASH FLOOD WARNINGS BE ISSUED. $$ SHEA/BOYNE
000 WGUS63 KARX 232022 FFAARX FLOOD WATCH NATIONAL WEATHER SERVICE LA CROSSE WI 322 PM CDT THU AUG 23 2007 ...FLASH FLOOD WATCH CANCELLED FOR NORTHEAST IOWA AND SOUTHWEST WISCONSIN... .A LOW PRESSURE SYSTEM WILL PRODUCE SHOWERS AND THUNDERSTORMS AS IT MOVES NORTHEAST THROUGH THE UPPER MISSISSIPPI RIVER VALLEY TONIGHT. SOME OF THESE THUNDERSTORMS MAY PRODUCE A SHORT PERIOD OF HEAVY RAIN. HOWEVER WIDESPREAD FLOODING IS NOT ANTICIPATED. AS A RESULT...THE FLASH FLOOD WATCH HAS BEEN CANCELLED. IAZ011-029-030-WIZ053>055-061-232130- /O.CAN.KARX.FF.A.0007.000000T0000Z-070824T0000Z/ /00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/ ALLAMAKEE-FAYETTE-CLAYTON-VERNON-CRAWFORD-RICHLAND-GRANT- INCLUDING THE CITIES OF...WAUKON...OELWEIN...VIROQUA... PRAIRIE DU CHIEN...RICHLAND CENTER...PLATTEVILLE 322 PM CDT THU AUG 23 2007 ...FLASH FLOOD WATCH IS CANCELLED... THE FLASH FLOOD WATCH FOR PORTIONS OF NORTHEAST IOWA AND SOUTHWEST WISCONSIN HAS BEEN CANCELLED. A SHORT PERIOD OF HEAVY RAIN MAY STILL FALL ACROSS THE AREA...BUT IT IS NOT ANTICIPATED TO PRODUCE WIDESPREAD FLOODING. $$ BOYNE
What forecasters said that day
The local office's own words before this flash flood watch went out, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.
NWS La Crosse, WI wrote its last area forecast discussion before this flash flood watch went out at Aug 22, 3:45 AM CDT, 33 minutes earlier.
Area forecast discussion, Aug 22, 3:45 AM CDT, 33 minutes before
AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE LA CROSSE WI
345 AM CDT WED AUG 22 2007
SHORT TERM...TODAY THROUGH FRIDAY NIGHT
FORECAST CONCERNS THIS PACKAGE...SHRA/TSRA CHANCES THRU THE
PERIOD...HEAVY RAIN/FLASH FLOOD THREAT AGAIN TONIGHT INTO THU
MORNING.
DATA ANALYSIS AT 06Z SHOWED ONE AREA OF LOW PRESSURE NORTH OF LK
WINNIPEG AND ANOTHER OVER EASTERN CO. TROUGH EXTENDED FROM THE CO
LOW INTO SOUTH CENTRAL MN...WITH THE FRONTAL BOUNDARY ARCING FROM
SOUTH CENTRAL MN TO NEAR CHICAGO. PER SATELLITE/RADAR IMAGERY
CONVECTIVE COMPLEX MOVING INTO EASTERN WI/NORTHERN IL/EASTERN IA
EARLY THIS MORNING...AS 850MB WINDS BACK TO THE WEST AND BETTER
MOISTURE TRANSPORT/THETA-E CONVERGENCE SHIFT EAST/SOUTH OF THE
FORECAST AREA. AREAS OF FOG COMMON ACROSS MUCH OF MN/WI WHERE CLOUDS
WERE THINNER OR THE LOW STRATO-CU DECK/MOISTURE OF THE PAST FEW DAYS
REMAINED.
NO LARGE ERRORS NOTED WITH 22/00Z NAM/GFS INITIALIZATIONS. NAM DID
APPEAR A BIT BETTER WITH THE 850-700MB HGT FIELDS ACROSS THE CENTRAL
CONUS AND LOW LEVEL MOISTURE FIELDS. SOLUTIONS REASONABLY SIMILAR
THRU THU...THEN RATHER DIFFERENT WITH TIMING/STRENGTH OF A WAVE TO
LIFT NORTHEAST ACROSS THE REGION. DPROG/DT OF 500MB HGTS AT 22/00Z
SHOWED BOTH NAM/GFS RUNS OF 20/00Z AND 21/00Z VERIFIED REASONABLY
WELL ACROSS NOAM...GFS WITH THE BETTER RUN-TO-RUN CONSISTENCY OVER
EASTERN NOAM WHILE NAM SHOWED THE BETTER CONSISTENCY WITH THE UPPER
LOW OVER MAN/SASKAT. FOR 00-36HRS MODELS SHOW DECENT RUN-TO-RUN
CONSISTENCY WITH NAM LOOKING BETTER OVER CENTRAL NOAM AND GFS
LOOKING BETTER ALONG THE COASTS. MODELS CONVERGING ON THE IDEA OF A
STRONGER SHORTWAVE TROUGH NEAR KFSD AT 12Z THU...BUT SOME
DIFFERENCES OF THE 500MB VORTICITY WITH IT. FOR 36-84HRS...GFS SHOWS
GOOD RUN-TO-RUN CONSISTENCY WITH THE SYNOPTIC SCALE FEATURES...WITH
UKMET/ECMWF SIMILAR TO IT. NAM WITH ITS MUCH STRONGER SHORTWAVE
TROUGH ACROSS THE CENTRAL CONUS AT 60-84HRS APPEARS TO BE AN
OUTLIER. CHECK OF OBS VS. MODEL DATA AT 06Z SHOWED NAM/GFS WITH
REASONABLE DEPICTIONS OF THE SFC MASS FIELDS ACROSS THE CENTRAL
CONUS. PER WV IMAGERY BOTH MODELS APPEARED REASONABLE WITH THE
SHORTWAVE FEATURES ACROSS NOAM. A BLEND OF NAM/GFS LOOKED BEST WITH
THE 00Z-06Z PRECIP ACROSS THE CONUS. WITH MODELS CONTINUING TO
STRUGGLE FROM RUN-TO-RUN WITH MESO-SCALE DETAILS OF CONVECTION
ACROSS THE REGION IN THE SHORT TERM...PREFER NOT TO FAVOR ONE
DETERMINISTIC MODEL RUN. LEANED TOWARD AN ENSEMBLE/MODEL BLEND THIS
CYCLE. BASED ON MANY DETAIL DIFFERENCES...FORECAST CONFIDENCE ONLY
AVERAGE THIS CYCLE.
IN THE SHORT TERM...FIRST ISSUE IS PRESENT FLASH FLOOD WATCH. WITH
CURRENT TSRA SHIFTING EAST/SOUTH OF THE AREA AND LITTLE IN THE WAY
OF 925-850MB MOISTURE TRANSPORT/THETA-E CONVERGENCE INTO THE AREA
THRU THIS MORNING...WILL CANCEL REMAINDER OF THIS WATCH WITH 4 AM
ISSUANCE. WILL CONTINUE SLIGHT CHANCE/CHANCE SHRA/TSRA TODAY WITH
THE FRONTAL BOUNDARY REMAINING JUST SOUTH OF THE AREA...MODELS
INDICATING MIXED LAYER CAPES OF 1K-2K J/KG NORTH OF THE FRONT AND
SOME WEAK 850-700MB MOISTURE TRANSPORT NORTHWARD OVER IT. DANGEROUS
SITUATION SETTING UP AGAIN FOR TONIGHT WITH AN INCREASING SURGE OF
925-700MB MOISTURE TRANSPORT/THETA-E CONVERGENCE NORTHWARD AND OVER
THE BOUNDARY. MODELS INDICATING MOST UNSTABLE CAPES OF 1K TO 1.5K
J/KG THRU THE NIGHT WITH PRECIPITABLE WATER VALUES NEAR 2 INCHES.
THIS ALONG WITH THE APPROACH OF THE STRONGER SHORTWAVE TROUGH AND
AREA UNDER RIGHT ENTRANCE REGION OF 70-90KT 300MB JET. WILL ISSUE
ANOTHER FLASH FLOOD WATCH FOR TONIGHT THROUGH 15Z THU MORNING. WIND
SHEAR ALOFT LOOKS TO SUPPORT A SLIGHT RISK OF SEVERE STORMS THIS
EVENING. FORCING/LIFT CONTINUES ON THU AS MID LEVEL QG CONVERGENCE
AHEAD OF THE SHORTWAVE TROUGH AND SFC WAVE MOVES ACROSS THE AREA
DURING THE MORNING. WEAK HIGH PRESSURE LOOKS TO BUILD FOR THU
NIGHT/FRI BEHIND THE SFC WAVE/500MB SHORTWAVE TROUGH. HOWEVER...WITH
MODELS STRUGGLING ON THE SMALLER SCALE DETAILS AND NAM/GFS OFFERING
DIFFERING SOLUTIONS FOR THU NIGHT AND BEYOND...WILL CONTINUE
SHRA/TSRA CHANCES FOR NOW. FAVORING ENSEMBLE/GFS/ECMWF/UKMET
CONSENSUS...WILL CONTINUE THE TREND TO START DRYING THINGS OUT FRI
NIGHT.
FAVORED A BLEND OF GUIDANCE HIGHS TODAY. GUIDANCE LOWS FOR TONIGHT
SIMILAR AND LOOK GOOD. LEANED TOWARD WARMER OF GUIDANCE HIGHS THU...
BUT THIS MAY BE OVERDONE IF SHRA/TSRA PERSIST MUCH OF THE DAY.
FAVORED WARMER OF GUIDANCE LOWS THU NIGHT WITH PLENTY OF CLOUDS
EXPECTED. FAVORED WARMER OF GUIDANCE HIGHS FRI. LATEST GFS MEX MOS
IN LINE WITH GRID FORECAST LOWS FRI NIGHT.
LONG TERM...SATURDAY THROUGH TUESDAY
22/00Z MEDIUM RANGE MODELS STILL SUPPORT IDEA OF SOME SHORTWAVE
RIDGING ALOFT OVER THE AREA FOR THE WEEKEND...WITH A DRIER CANADIAN
HIGH PRESSURE/AIRMASS SETTLING ACROSS THE AREA. RIDGING LOOKS TO BE
SHORT LIVED THOUGH WITH ANOTHER SHORTWAVE TROUGH SLIDING ACROSS
SOUTHERN CANADA MON/TUE. THIS TROUGH IS RESPONSIBLE FOR LOW PRESSURE
IN THE NORTHERN PLAINS COME MON...WITH SOUTHERLY FLOW AND MOISTURE
RETURN INTO THE UPPER MIDWEST FOR EARLY NEXT WEEK. CURRENT DAY 4-7
GRID-SET LOOKS WELL TRENDED FOR NOW WITH DRY SAT/SUN THEN SHRA/TSRA
CHANCES MON/TUE. NO CHANGES MADE TO SAT-TUE GRIDS FOR NOW...BUT
HIGHS MON MAY NEED TO COME UP A BIT. WILL LEAVE THIS TO DAY CREW
WITH FULL COMPLIMENT OF MEDIUM RANGE GUIDANCE AND NATIONAL
DISCUSSIONS TO HELP SORT OUT THE MEDIUM RANGE DETAILS.
.AVIATION...TODAY INTO THIS EVENING
NEARLY STATIONARY FRONTAL BOUNDARY WILL REMAIN JUST TO THE SOUTH OF
KRST/KLSE TAF SITES THROUGH THE PERIOD. BEST MOISTURE FEED AND
RESULTANT THUNDERSTORM COMPLEX WILL LEAN OVER INTO SOUTHEAST WI THIS
MORNING. SOME SCATTERED SHOWERS STILL POSSIBLE AT KLSE THROUGH 10Z.
OTHERWISE...WITH ABUNDANT LOW LEVEL MOISTURE...MVFR/IFR CIGS AND
VSBYS DUE TO FOG EXPECTED AT KLSE/KRST TAF SITES THROUGH MID MORNING
HOURS BEFORE MIXING DISPERSES THESE CONDITIONS. CONVECTION THEN
EXPECTED TO RE-FIRE ALONG AND NORTH OF THE FRONTAL BOUNDARY BY THIS
EVENING. HAVE INCLUDED VCTS AT KRST BY 23Z AND KLSE BY 00Z.
.ARX WATCHES/WARNINGS/ADVISORIES...
WI...FLASH FLOOD WATCH FROM THIS EVENING THROUGH THURSDAY MORNING
FOR WIZ041-WIZ053-WIZ054-WIZ055-WIZ061.
MN...FLASH FLOOD WATCH FROM THIS EVENING THROUGH THURSDAY MORNING
FOR MNZ079-MNZ086-MNZ087-MNZ088-MNZ094-MNZ095-MNZ096.
IA...FLASH FLOOD WATCH FROM THIS EVENING THROUGH THURSDAY MORNING
FOR IAZ008-IAZ009-IAZ010-IAZ011-IAZ018-IAZ019-IAZ029-IAZ030.
SHORT-LONG TERM...RRS
AVIATION..........DAS
&&Hazardous weather outlook, Aug 21, 8:10 PM CDT, 8 hours 8 minutes before
HAZARDOUS WEATHER OUTLOOK NATIONAL WEATHER SERVICE LA CROSSE WI 810 PM CDT TUE AUG 21 2007 IAZ008>011-018-019-029-030-MNZ086>088-094>096-WIZ041-053>055-061- 221100- ALLAMAKEE-CHICKASAW-CLAYTON-CRAWFORD-DODGE-FAYETTE-FILLMORE-FLOYD- GRANT-HOUSTON-HOWARD-LA CROSSE-MITCHELL-MOWER-OLMSTED-RICHLAND- VERNON-WINNESHIEK-WINONA- 810 PM CDT TUE AUG 21 2007 THIS HAZARDOUS WEATHER OUTLOOK IS FOR PARTS OF NORTHEAST IOWA... SOUTHEAST MINNESOTA AND SOUTHWEST WISCONSIN. .DAY ONE...TONIGHT A FLASH FLOOD WATCH IS IN EFFECT FOR TONIGHT. STRONG THUNDERSTORMS WILL MOVE THROUGH THE AREA TONIGHT WITH MORE HEAVY RAIN AND A CONTINUED THREAT FOR FLOODING AND FLASH FLOODING. RAINFALL AMOUNTS FROM 1 TO AS MUCH AS 3 INCHES ARE EXPECTED...AND IF RAINFALL RATES ARE HIGH ENOUGH...FLASH FLOODING WILL BE POSSIBLE IN ALREADY FLOOD RAVAGED AREAS. A FEW LOCALIZED AMOUNTS EXCEEDING 3 INCHES WILL BE POSSIBLE WHERE THUNDERSTORMS ARE REPETITIVE OVER THE SAME AREAS. THE THUNDERSTORMS MAY BE STRONG ENOUGH TO BECOME SEVERE THROUGH THE LATE EVENING HOURS ACROSS NORTHEAST IOWA AND EXTREME SOUTHEAST MINNESOTA. THE MAIN THREATS WOULD BE LARGE HAIL...AND DAMAGING WIND GUSTS. .DAYS TWO THROUGH SEVEN...WEDNESDAY THROUGH MONDAY THE FRONTAL BOUNDARY IS EXPECTED TO REMAIN JUST SOUTH OF THE AREA THROUGH THE REST OF THE WEEK. THE MOIST...UNSTABLE AIRMASS WILL REMAIN IN PLACE SOUTH OF THE FRONT. THUS...THE CHANCES OF SHOWERS AND THUNDERSTORMS WILL CONTINUE ACROSS THE AREA FOR MUCH OF THE WEDNESDAY THROUGH FRIDAY PERIOD. HIGH PRESSURE AND SOME DRIER AIR STILL LOOKS TO PUSH IN FOR THE WEEKEND INTO EARLY NEXT WEEK. THE GREATEST THREAT FROM ANY OF THE WEDNESDAY THROUGH FRIDAY THUNDERSTORMS CONTINUES TO BE ADDITIONAL HEAVY RAINS. THE FLASH FLOOD WATCH CONTINUES THROUGH EARLY WEDNESDAY MORNING. ADDITIONAL ROUNDS OF HEAVY RAIN POSE CONTINUED FLOODING CONCERNS ACROSS MUCH OF THE AREA. WITH A STRONGER PUSH OF THE WARM AND UNSTABLE AIRMASS NORTHWARD POSSIBLE WEDNESDAY AND THURSDAY AFTERNOON AND EVENING. FURTHER FLASH FLOOD WATCHES MAY BE NEEDED...AND A FEW OF THE STORMS COULD BECOME SEVERE. THE BETTER THREAT OF ANY SEVERE STORMS WOULD BE SOUTH OF AN AUSTIN MINNESOTA TO RICHLAND CENTER WISCONSIN LINE...WITH THE MAIN THREATS BEING LARGE HAIL AND MORE HEAVY RAINS. IT IS TOO EARLY TO DETERMINE THE TIMING AND DETAILS OF ANY SEVERE STORM THREATS ON FRIDAY. .SPOTTER INFORMATION STATEMENT... SPOTTER ACTIVATION MAY BE THROUGH 11 PM THIS EVENING. THERE IS A CHANCE FOR SPOTTER ACTIVATION AGAIN WEDNESDAY AND THURSDAY. REPORTS OF HEAVY RAINFALL OR ANY RENEWED FLOODING PROBLEMS WOULD BE GREATLY APPRECIATED. .EMERGENCY MANAGEMENT COORDINATION... NO CALL IS SCHEDULED. MNZ079-WIZ017-029-032>034-042>044-221100- ADAMS-BUFFALO-CLARK-JACKSON-JUNEAU-MONROE-TAYLOR-TREMPEALEAU-WABASHA- 810 PM CDT TUE AUG 21 2007 THIS HAZARDOUS WEATHER OUTLOOK IS FOR PARTS OF SOUTHEAST MINNESOTA INTO WESTERN AND CENTRAL WISCONSIN. .DAY ONE...TODAY AND TONIGHT A STATIONARY FRONTAL BOUNDARY IS EXPECTED TO REMAIN IN PLACE ACROSS NORTHERN IOWA AND NORTHERN ILLINOIS TONIGHT. THUNDERSTORMS WILL MOVE OUT OF IOWA AND ACROSS THE AREA OVERNIGHT AS WARMTH AND MOISTURE SPREAD OVER THE FRONTAL BOUNDARY. A FEW OF THE STORMS COULD PRODUCE LOCALLY HEAVY RAINS...WITH A FEW LOCATIONS SEEING 1 TO 2 INCHES OF RAIN. A FEW SEVERE STORMS WITH LARGE HAIL CANNOT BE RULED OUT...PARTICULARLY THROUGH THE EARLY PORTIONS OF THE OVERNIGHT HOURS. .DAYS TWO THROUGH SEVEN...WEDNESDAY THROUGH MONDAY THE FRONTAL BOUNDARY IS EXPECTED TO REMAIN ACROSS NORTHERN IOWA THROUGH THE REST OF THE WEEK. A MOIST...UNSTABLE AIRMASS WILL REMAIN IN PLACE SOUTH OF THE FRONT. THUS...THE CHANCES OF SHOWERS AND THUNDERSTORMS WILL CONTINUE ACROSS THE AREA FOR MUCH OF THE WEDNESDAY THROUGH FRIDAY PERIOD. HIGH PRESSURE AND SOME DRIER AIR STILL LOOKS TO PUSH IN FOR THE WEEKEND INTO EARLY NEXT WEEK. THE GREATEST THREAT FROM ANY OF THE WEDNESDAY THROUGH FRIDAY THUNDERSTORMS CONTINUES TO BE LOCALLY HEAVY RAINS. IF THE FRONT PUSHES A BIT FURTHER NORTH THERE WOULD BE A THREAT FOR A FEW SEVERE STORMS DURING THE AFTERNOON AND EVENING HOURS OF WEDNESDAY AND THURSDAY. FOR NOW IT APPEARS THE FRONT WILL STAY PUT AND THE SEVERE STORM THREAT WILL REMAIN SOUTH OF THE AREA. IT IS TOO EARLY TO DETERMINE THE TIMING AND DETAILS OF ANY SEVERE STORM THREATS ON FRIDAY. .SPOTTER INFORMATION STATEMENT... SPOTTER ACTIVATION IS NOT EXPECTED TODAY OR TONIGHT. REPORTS OF ANY HEAVY RAINS WOULD BE GREATLY APPRECIATED. .EMERGENCY MANAGEMENT COORDINATION... NO CALL IS SCHEDULED. BINAU
In the hours before
Local storm report, Aug 21, 11:35 PM CDT, 4 hours 43 minutes before
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE LA CROSSE WI
1135 PM CDT TUE AUG 21 2007
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..
1127 PM TSTM WND GST VILLAGE CREEK 43.32N 91.25W
08/21/2007 E50.00 MPH ALLAMAKEE IA LAW ENFORCEMENT
&&
ADAMSLocal storm report, Aug 22, 12:09 AM CDT, 4 hours 9 minutes before
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE LA CROSSE WI
1209 AM CDT WED AUG 22 2007
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..
1115 PM TSTM WND DMG HANOVER 43.36N 91.53W
08/21/2007 ALLAMAKEE IA LAW ENFORCEMENT
CAR BLOWN INTO A DITCH
&&
BOYNELocal storm report, Aug 22, 12:21 AM CDT, 3 hours 57 minutes before
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE LA CROSSE WI
1221 AM CDT WED AUG 22 2007
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..
1124 PM TSTM WND DMG 2 NW EITZEN 43.53N 91.49W
08/21/2007 HOUSTON MN LAW ENFORCEMENT
POWER LINE BLOWN DOWN
1200 AM FLASH FLOOD CALEDONIA 43.63N 91.50W
08/22/2007 HOUSTON MN LAW ENFORCEMENT
WATER OVER THE ROAD NEAR GREEN ACRES
&&
BOYNELocal storm report, Aug 22, 12:35 AM CDT, 3 hours 43 minutes before
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE LA CROSSE WI
1235 AM CDT WED AUG 22 2007
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..
1150 PM TSTM WND DMG DE SOTO 43.43N 91.20W
08/21/2007 VERNON WI LAW ENFORCEMENT
TREES AND POWER LINES BLOWN DOWN
1205 AM TSTM WND DMG VIROQUA 43.56N 90.89W
08/22/2007 VERNON WI AMATEUR RADIO
TREES AND POWER LINES BLOWN DOWN
1218 AM TSTM WND DMG ROCKTON 43.65N 90.60W
08/22/2007 VERNON WI LAW ENFORCEMENT
TREES AND POWER LINES DOWN.
&&
BOYNELocal storm report, Aug 22, 12:45 AM CDT, 3 hours 33 minutes before
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE LA CROSSE WI
1245 AM CDT WED AUG 22 2007
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..
1215 AM TSTM WND DMG RICHLAND CENTER 43.34N 90.38W
08/22/2007 RICHLAND WI LAW ENFORCEMENT
TREES DOWN IN TOWN.
&&
ADAMSLocal storm report, Aug 22, 2:09 AM CDT, 2 hours 9 minutes before
PRELIMINARY LOCAL STORM REPORT...SUMMARY
NATIONAL WEATHER SERVICE LA CROSSE WI
209 AM CDT WED AUG 22 2007
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..
0855 PM HAIL AUSTIN 43.67N 92.97W
08/21/2007 E1.00 INCH MOWER MN EMERGENCY MNGR
0855 PM HAIL 2 E AUSTIN 43.67N 92.93W
08/21/2007 E1.75 INCH MOWER MN EMERGENCY MNGR
0912 PM HAIL DEXTER 43.72N 92.70W
08/21/2007 E1.00 INCH MOWER MN LAW ENFORCEMENT
0924 PM HAIL 3 W RACINE 43.78N 92.54W
08/21/2007 E0.88 INCH MOWER MN FIRE DEPT/RESCUE
REPORTED BY STEWARTVILLE FIRE DEPARTMENT STORM SPOTTERS.
0927 PM HAIL RACINE 43.78N 92.48W
08/21/2007 E1.00 INCH MOWER MN TRAINED SPOTTER
NICKEL TO QUARTER SIZED HAIL FELL FOR NEARLY 10 MINUTES.
1008 PM FLASH FLOOD AUSTIN 43.67N 92.97W
08/21/2007 MOWER MN BROADCAST MEDIA
KAAL-TV REPORTED STREET FLOODING ON 4TH STREET NEAR
INTERSTATE 90.
1018 PM TSTM WND GST 1 E CHARLES CITY 43.07N 92.66W
08/21/2007 M51.00 MPH FLOYD IA AWOS
1020 PM FLASH FLOOD AUSTIN 43.67N 92.97W
08/21/2007 MOWER MN BROADCAST MEDIA
KAAL TV REPORTED FLOODING ALONG OAKLAND AVENUE
1030 PM FLASH FLOOD SPRING VALLEY 43.69N 92.39W
08/21/2007 FILLMORE MN LAW ENFORCEMENT
PART OF BASEMENT WALL COLLAPSED IN A HOUSE
1035 PM HEAVY RAIN SPRING VALLEY 43.69N 92.39W
08/21/2007 M2.50 INCH FILLMORE MN AMATEUR RADIO
MOST OF THAT RAIN FELL DURING THE PAST HOUR.
1035 PM FLASH FLOOD SPRING VALLEY 43.69N 92.39W
08/21/2007 FILLMORE MN LAW ENFORCEMENT
STREET FLOODING REPORTED
1115 PM TSTM WND DMG HANOVER 43.36N 91.53W
08/21/2007 ALLAMAKEE IA LAW ENFORCEMENT
CAR BLOWN INTO A DITCH
1119 PM TSTM WND DMG DECORAH 43.31N 91.79W
08/21/2007 WINNESHIEK IA LAW ENFORCEMENT
SEVERAL TREES BLOWN DOWN
1124 PM TSTM WND DMG 2 NW EITZEN 43.53N 91.49W
08/21/2007 HOUSTON MN LAW ENFORCEMENT
POWER LINE BLOWN DOWN
1127 PM TSTM WND GST VILLAGE CREEK 43.32N 91.25W
08/21/2007 E50.00 MPH ALLAMAKEE IA LAW ENFORCEMENT
1150 PM TSTM WND DMG DE SOTO 43.43N 91.20W
08/21/2007 VERNON WI LAW ENFORCEMENT
TREES AND POWER LINES BLOWN DOWN
1200 AM FLASH FLOOD CALEDONIA 43.63N 91.50W
08/22/2007 HOUSTON MN LAW ENFORCEMENT
WATER OVER THE ROAD NEAR GREEN ACRES
1205 AM TSTM WND DMG VIROQUA 43.56N 90.89W
08/22/2007 VERNON WI AMATEUR RADIO
TREES AND POWER LINES BLOWN DOWN
1215 AM TSTM WND DMG RICHLAND CENTER 43.34N 90.38W
08/22/2007 RICHLAND WI LAW ENFORCEMENT
TREES DOWN IN TOWN.
1218 AM TSTM WND DMG ROCKTON 43.65N 90.60W
08/22/2007 VERNON WI LAW ENFORCEMENT
TREES AND POWER LINES DOWN.
&&
BINAUThe office that day
Everything else NWS La Crosse, WI issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Aug 21, 8:43 PM CDT | Severe Thunderstorm Warning | ARX | Mower | 47 min |
| Aug 21, 9:14 PM CDT | Flash Flood Warning | ARX | Fillmore, Mower | 3 hr |
| Aug 21, 9:53 PM CDT | Flash Flood Warning | ARX | Houston | 3 hr |
| Aug 21, 9:50 PM CDT | Severe Thunderstorm Warning | ARX | Floyd | 40 min |
| Aug 21, 10:15 PM CDT | Severe Thunderstorm Warning | ARX | Chickasaw | 45 min |
| Aug 21, 11:09 PM CDT | Severe Thunderstorm Warning | ARX | Allamakee | 51 min |
| Aug 21, 11:22 PM CDT | Severe Thunderstorm Warning | ARX | Winneshiek | 23 min |
| Aug 22, 4:44 AM CDT | River Flood Warning | ARX | Allamakee | 35 hr |
| Aug 22, 3:17 PM CDT | Severe Thunderstorm Warning | ARX | Fayette | 58 min |
| Aug 21, 11:34 PM CDT | Severe Thunderstorm Warning | ARX | Crawford | 41 min |
| Aug 21, 11:44 PM CDT | Flash Flood Warning | ARX | Vernon | 3 hr |
| Aug 22, 12:01 AM CDT | Severe Thunderstorm Warning | ARX | Grant, Richland | 44 min |
| Aug 22, 12:15 AM CDT | Severe Thunderstorm Warning | ARX | Vernon | 60 min |
| Aug 22, 4:53 PM CDT | Severe Thunderstorm Warning | ARX | Grant | 52 min |
| Aug 22, 5:32 PM CDT | Flash Flood Warning | ARX | Grant | 3 hr |
Nearby
Flash Flood Watches in Iowa, 2007Flash Flood Watches in Minnesota, 2007Flash Flood Watches in Wisconsin, 2007Every flash flood watch in 2007
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.