Alert archive / Iowa / Winter Storm Warnings in 2009
Winter Storm Warning 2, NWS La Crosse, WI
NWS La Crosse, WI issued this winter storm warning at Feb 20, 2009, 3:34 PM CST for Grant County, Wisconsin; Clayton County, Fayette County, Iowa. It took effect at Feb 20, 2009, 6:00 PM CST. It was in force for 10 hr. 2 reports came from inside the area while it was in force.
The area
The counties it named, with what was reported inside it.
The facts
- Issued
- Feb 20, 2009, 3:34 PM CST (21:34 UTC)
- In effect from
- Feb 20, 2009, 6:00 PM CST
- Expired
- Feb 21, 2009, 4:09 AM CST
- In force
- 10 hr
- Issued by
- NWS La Crosse, WI
Counties Clayton County, IA, Fayette County, IA, Grant County, WI
The radar
The La Crosse radar (KARX), 108 km from the middle of the area, began a volume at 21:37 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.
What was reported inside it
| Time | Report | Where | Remark |
|---|---|---|---|
| Feb 21, 2:42 AM CST | SNOW 3 | West Union, IA | |
| Feb 21, 2:48 AM CST | SNOW 1 | Elkader, IA |
Local storm reports filed while the alert was in force, from inside its polygon or its counties.
The nearest sounding before it
Davenport, (KDVN), launched 12:00Z, 9.6 hours before the alert went out and 153 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
- 1332 m above ground
- 0-6 km bulk shear
- 52 kt
- 0-1 km storm-relative helicity
- 63 m²/s²
- 0-3 km storm-relative helicity
- 112 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted, in the capitals the NWS used until 2016.
000 WWUS43 KARX 202134 WSWARX URGENT - WINTER WEATHER MESSAGE NATIONAL WEATHER SERVICE LA CROSSE WI 334 PM CST FRI FEB 20 2009 ...ACCUMULATING SNOW FOR THE AREA TONIGHT INTO SATURDAY MORNING... .A VIGOROUS STORM SYSTEM NOW OVER THE NORTHERN PLAINS WILL PUSH INTO IOWA THIS EVENING AND THEN INTO NORTHERN ILLINOIS LATE TONIGHT. SNOW WAS ALREADY FALLING ACROSS SOUTH CENTRAL MINNESOTA. THIS SNOW WILL CONTINUE TO SPREAD SOUTHEAST INTO SOUTHEAST MINNESOTA LATE THIS AFTERNOON AND ACROSS THE REMAINDER OF THE REGION THIS EVENING. THE SNOW WILL BE MODERATE TO HEAVY AT TIMES ACROSS PORTIONS OF SOUTHEAST MINNESOTA...NORTHEAST IOWA AND SOUTHWEST WISCONSIN TONIGHT. THE HEAVIEST SNOW IS EXPECTED TO FALL GENERALLY SOUTH OF A WEST UNION IOWA...TO BOSCOBEL WISCONSIN LINE...WHERE 5 TO 7 INCHES OF SNOW IS LIKELY...WITH LESSER AMOUNTS OF 3 TO 6 INCHES NORTH OF THIS LINE. THIS SNOW WILL TAPER OFF SATURDAY MORNING. IAZ029-030-WIZ061-210545- /O.UPG.KARX.WW.Y.0006.090221T0000Z-090221T1800Z/ /O.NEW.KARX.WS.W.0002.090221T0000Z-090221T1800Z/ FAYETTE-CLAYTON-GRANT- INCLUDING THE CITIES OF...OELWEIN...PLATTEVILLE 334 PM CST FRI FEB 20 2009 ...WINTER STORM WARNING IN EFFECT UNTIL NOON CST SATURDAY... THE NATIONAL WEATHER SERVICE IN LA CROSSE HAS ISSUED A WINTER STORM WARNING FOR HEAVY SNOW...WHICH IS IN EFFECT UNTIL NOON CST SATURDAY. THE WINTER WEATHER ADVISORY IS NO LONGER IN EFFECT. SNOW WILL DEVELOP AND SPREAD ACROSS THE AREA THIS EVENING. THE SNOW WILL BE MODERATE TO LOCALLY HEAVY AT TIMES TONIGHT THEN TAPER OFF SATURDAY MORNING. SNOW AMOUNTS OF 5 TO 7 INCHES ARE POSSIBLE THROUGH SATURDAY MORNING. NORTHWEST WINDS WILL INCREASE LATE TONIGHT AND SATURDAY MORNING AS THE LOW PULLS AWAY. THESE WINDS WILL CREATE SOME BLOWING AND DRIFTING OF THE NEW SNOW IN OPEN COUNTRY AND ACROSS THE RIDGE TOPS. PRECAUTIONARY/PREPAREDNESS ACTIONS... A WINTER STORM WARNING FOR HEAVY SNOW MEANS SEVERE WINTER WEATHER CONDITIONS ARE EXPECTED OR OCCURRING. SIGNIFICANT AMOUNTS OF SNOW ARE FORECAST THAT WILL MAKE TRAVEL DANGEROUS. ONLY TRAVEL IN AN EMERGENCY. IF YOU MUST TRAVEL...KEEP AN EXTRA FLASHLIGHT...FOOD...AND WATER IN YOUR VEHICLE IN CASE OF AN EMERGENCY. && $$ MNZ079-WIZ041>044-210545- /O.EXA.KARX.WW.Y.0006.090221T0000Z-090221T1800Z/ WABASHA-LA CROSSE-MONROE-JUNEAU-ADAMS- INCLUDING THE CITIES OF...LA CROSSE...SPARTA/TOMAH...MAUSTON 334 PM CST FRI FEB 20 2009 ...WINTER WEATHER ADVISORY IN EFFECT UNTIL NOON CST SATURDAY... THE NATIONAL WEATHER SERVICE IN LA CROSSE HAS ISSUED A WINTER WEATHER ADVISORY FOR SNOW...WHICH IS IN EFFECT UNTIL NOON CST SATURDAY. SNOW WILL SPREAD ACROSS THE AREA THIS EVENING. THE SNOW WILL BE MODERATE AT TIMES TONIGHT THEN TAPER OFF SATURDAY MORNING. SNOW AMOUNTS OF 2 TO 5 INCHES ARE POSSIBLE THROUGH SATURDAY MORNING. NORTHWEST WINDS WILL INCREASE LATE TONIGHT AND SATURDAY MORNING AS THE LOW PULLS AWAY. THESE WINDS WILL CREATE SOME BLOWING AND DRIFTING OF THE NEW SNOW IN OPEN COUNTRY AND ACROSS THE RIDGE TOPS. PRECAUTIONARY/PREPAREDNESS ACTIONS... A WINTER WEATHER ADVISORY FOR SNOW MEANS THAT PERIODS OF SNOW WILL CAUSE PRIMARILY TRAVEL DIFFICULTIES. BE PREPARED FOR SNOW COVERED ROADS AND LIMITED VISIBILITIES...AND USE CAUTION WHILE DRIVING. && $$ IAZ008>011-018-019-MNZ086>088-094>096-WIZ053>055-210545- /O.CON.KARX.WW.Y.0006.090221T0000Z-090221T1800Z/ MITCHELL-HOWARD-WINNESHIEK-ALLAMAKEE-FLOYD-CHICKASAW-DODGE- OLMSTED-WINONA-MOWER-FILLMORE-HOUSTON-VERNON-CRAWFORD-RICHLAND- INCLUDING THE CITIES OF...DECORAH...WAUKON...CHARLES CITY... ROCHESTER...WINONA...AUSTIN...VIROQUA...PRAIRIE DU CHIEN... RICHLAND CENTER 334 PM CST FRI FEB 20 2009 ...WINTER WEATHER ADVISORY REMAINS IN EFFECT UNTIL NOON CST SATURDAY... A WINTER WEATHER ADVISORY REMAINS IN EFFECT UNTIL NOON CST SATURDAY. SNOW WILL SPREAD ACROSS THE AREA LATE THIS AFTERNOON AND EARLY THIS EVENING. THE SNOW WILL BE MODERATE TO LOCALLY HEAVY AT TIMES TONIGHT THEN TAPER OFF SATURDAY MORNING. SNOW AMOUNTS OF 3 TO 6 INCHES ARE POSSIBLE THROUGH SATURDAY MORNING. NORTHWEST WINDS WILL INCREASE LATE TONIGHT AND SATURDAY MORNING AS THE LOW PULLS AWAY. THESE WINDS WILL CREATE SOME BLOWING AND DRIFTING OF THE NEW SNOW IN OPEN COUNTRY AND ACROSS THE RIDGE TOPS. PRECAUTIONARY/PREPAREDNESS ACTIONS... A WINTER WEATHER ADVISORY FOR SNOW MEANS THAT PERIODS OF SNOW WILL CAUSE PRIMARILY TRAVEL DIFFICULTIES. BE PREPARED FOR SNOW COVERED ROADS AND LIMITED VISIBILITIES...AND USE CAUTION WHILE DRIVING. && $$ RABERDING WEATHER.GOV/LACROSSE
6 follow-up statements
000 WWUS43 KARX 202350 WSWARX URGENT - WINTER WEATHER MESSAGE NATIONAL WEATHER SERVICE LA CROSSE WI 550 PM CST FRI FEB 20 2009 ...ACCUMULATING SNOW FOR THE AREA TONIGHT INTO SATURDAY MORNING... .A VIGOROUS STORM SYSTEM WILL PUSH FROM THE NORTHERN PLAINS INTO IOWA THIS EVENING AND THEN INTO NORTHERN ILLINOIS LATE TONIGHT. THIS SYSTEM IS EXPECTED TO BRING MODERATE TO HEAVY SNOW AT TIMES ACROSS PORTIONS OF SOUTHEAST MINNESOTA...NORTHEAST IOWA AND SOUTHWEST WISCONSIN TONIGHT. THE HEAVIEST SNOW IS EXPECTED TO FALL GENERALLY SOUTH OF A WEST UNION IOWA...TO BOSCOBEL WISCONSIN LINE...WHERE 5 TO 7 INCHES OF SNOW IS LIKELY...WITH LESSER AMOUNTS OF 3 TO 6 INCHES NORTH OF THIS LINE. THIS SNOW WILL TAPER OFF SATURDAY MORNING...BUT GUSTY NORTHERLY WINDS SHOULD CAUSE BLOWING AND DRIFTING. IAZ029-030-WIZ061-210800- /O.CON.KARX.WS.W.0002.090221T0000Z-090221T1800Z/ FAYETTE-CLAYTON-GRANT- INCLUDING THE CITIES OF...OELWEIN...PLATTEVILLE 550 PM CST FRI FEB 20 2009 ...WINTER STORM WARNING REMAINS IN EFFECT UNTIL NOON CST SATURDAY... A WINTER STORM WARNING REMAINS IN EFFECT UNTIL NOON CST SATURDAY. SNOW WILL DEVELOP AND SPREAD ACROSS THE AREA THIS EVENING...WITH VISIBILITY DROPPING STEADILY ONCE THE SNOW BEGINS. SNOW WILL BE MODERATE TO LOCALLY HEAVY AT TIMES TONIGHT THEN TAPER OFF SATURDAY MORNING. SNOW AMOUNTS OF 5 TO 7 INCHES ARE POSSIBLE THROUGH SATURDAY MORNING. NORTHWEST WINDS WILL INCREASE LATE TONIGHT AND SATURDAY MORNING AS THE LOW PULLS AWAY. THESE WINDS WILL CREATE SOME BLOWING AND DRIFTING OF THE NEW SNOW IN OPEN COUNTRY AND ACROSS THE RIDGE TOPS. PRECAUTIONARY/PREPAREDNESS ACTIONS... A WINTER STORM WARNING FOR HEAVY SNOW MEANS SEVERE WINTER WEATHER CONDITIONS ARE EXPECTED OR OCCURRING. SIGNIFICANT AMOUNTS OF SNOW ARE FORECAST THAT WILL MAKE TRAVEL DANGEROUS. ONLY TRAVEL IN AN EMERGENCY. IF YOU MUST TRAVEL...KEEP AN EXTRA FLASHLIGHT...FOOD... AND WATER IN YOUR VEHICLE IN CASE OF AN EMERGENCY. && $$ IAZ008>011-018-019-MNZ079-086>088-094>096-WIZ041>044-053>055- 210800- /O.CON.KARX.WW.Y.0006.090221T0000Z-090221T1800Z/ MITCHELL-HOWARD-WINNESHIEK-ALLAMAKEE-FLOYD-CHICKASAW-WABASHA- DODGE-OLMSTED-WINONA-MOWER-FILLMORE-HOUSTON-LA CROSSE-MONROE- JUNEAU-ADAMS-VERNON-CRAWFORD-RICHLAND- INCLUDING THE CITIES OF...DECORAH...WAUKON...CHARLES CITY... ROCHESTER...WINONA...AUSTIN...LA CROSSE...SPARTA/TOMAH... MAUSTON...VIROQUA...PRAIRIE DU CHIEN...RICHLAND CENTER 550 PM CST FRI FEB 20 2009 ...WINTER WEATHER ADVISORY REMAINS IN EFFECT UNTIL NOON CST SATURDAY... A WINTER WEATHER ADVISORY REMAINS IN EFFECT UNTIL NOON CST SATURDAY. SNOW WILL SPREAD ACROSS THE AREA DURING THE EVENING...WITH VISIBILITY DROPPING STEADILY ONCE THE SNOW BEGINS. SNOW WILL BE MODERATE TO LOCALLY HEAVY AT TIMES TONIGHT THEN TAPER OFF SATURDAY MORNING. SNOW AMOUNTS OF 3 TO 6 INCHES ARE POSSIBLE THROUGH SATURDAY MORNING. NORTHWEST WINDS WILL INCREASE LATE TONIGHT AND SATURDAY MORNING AS THE LOW PULLS AWAY. THESE WINDS WILL CREATE SOME BLOWING AND DRIFTING OF THE NEW SNOW IN OPEN COUNTRY AND ACROSS THE RIDGE TOPS. PRECAUTIONARY/PREPAREDNESS ACTIONS... A WINTER WEATHER ADVISORY FOR SNOW MEANS THAT PERIODS OF SNOW WILL CAUSE PRIMARILY TRAVEL DIFFICULTIES. BE PREPARED FOR SNOW COVERED ROADS AND LIMITED VISIBILITIES...AND USE CAUTION WHILE DRIVING. && $$ THOMPSON WEATHER.GOV/LACROSSE
000 WWUS43 KARX 210156 WSWARX URGENT - WINTER WEATHER MESSAGE NATIONAL WEATHER SERVICE LA CROSSE WI 756 PM CST FRI FEB 20 2009 ...ACCUMULATING SNOW FOR THE AREA TONIGHT INTO SATURDAY MORNING... .A VIGOROUS STORM SYSTEM WILL PUSH FROM THE NORTHERN PLAINS INTO IOWA THIS EVENING AND THEN INTO NORTHERN ILLINOIS LATE TONIGHT. THIS SYSTEM IS EXPECTED TO BRING MODERATE TO HEAVY SNOW AT TIMES ACROSS PORTIONS OF SOUTHEAST MINNESOTA...NORTHEAST IOWA AND SOUTHWEST WISCONSIN TONIGHT. THE HEAVIEST SNOW IS EXPECTED TO FALL GENERALLY SOUTH OF A WEST UNION IOWA...TO BOSCOBEL WISCONSIN LINE...WHERE 5 TO 7 INCHES OF SNOW IS LIKELY...WITH LESSER AMOUNTS OF 3 TO 6 INCHES NORTH OF THIS LINE. THIS SNOW WILL TAPER OFF SATURDAY MORNING...BUT GUSTY NORTHERLY WINDS SHOULD CAUSE BLOWING AND DRIFTING. IAZ029-030-WIZ061-211000- /O.CON.KARX.WS.W.0002.000000T0000Z-090221T1800Z/ FAYETTE-CLAYTON-GRANT- INCLUDING THE CITIES OF...OELWEIN...PLATTEVILLE 756 PM CST FRI FEB 20 2009 ...WINTER STORM WARNING REMAINS IN EFFECT UNTIL NOON CST SATURDAY... A WINTER STORM WARNING REMAINS IN EFFECT UNTIL NOON CST SATURDAY. SNOW IS EXPECTED TO CONTINUE SPREADING FROM NORTHEAST IOWA INTO SOUTHWEST WISCONSIN THIS EVENING...CROSSING THE MISSISSIPPI RIVER BETWEEN 8 PM AND 10 PM. HEAVIER SNOW WITH SNOWFALL RATES UP TO AN INCH PER HOUR ARE EXPECTED FROM DECORAH AND WEST UNION IOWA AREAS... TOWARD WAUKON AND ELKADER IOWA. THIS HEAVIER SNOWFALL SHOULD AFFECT PARTS OF SOUTHWEST WISCONSIN...MAINLY BY ABOUT 10 PM AND THEREAFTER. SNOW WILL CONTINUE TO BE MODERATE TO LOCALLY HEAVY AT TIMES TONIGHT THEN TAPER OFF SATURDAY MORNING. SNOW AMOUNTS OF 5 TO 7 INCHES ARE POSSIBLE THROUGH SATURDAY MORNING. NORTHWEST WINDS WILL INCREASE LATE TONIGHT AND SATURDAY MORNING AS THE LOW PULLS AWAY. THESE WINDS WILL CREATE SOME BLOWING AND DRIFTING OF THE NEW SNOW IN OPEN COUNTRY AND ACROSS THE RIDGE TOPS. PRECAUTIONARY/PREPAREDNESS ACTIONS... A WINTER STORM WARNING FOR HEAVY SNOW MEANS SEVERE WINTER WEATHER CONDITIONS ARE EXPECTED OR OCCURRING. SIGNIFICANT AMOUNTS OF SNOW ARE FORECAST THAT WILL MAKE TRAVEL DANGEROUS. ONLY TRAVEL IN AN EMERGENCY. IF YOU MUST TRAVEL...KEEP AN EXTRA FLASHLIGHT...FOOD... AND WATER IN YOUR VEHICLE IN CASE OF AN EMERGENCY. && $$ IAZ008>011-018-019-MNZ079-086>088-094>096-WIZ041>044-053>055- 211000- /O.CON.KARX.WW.Y.0006.000000T0000Z-090221T1800Z/ MITCHELL-HOWARD-WINNESHIEK-ALLAMAKEE-FLOYD-CHICKASAW-WABASHA- DODGE-OLMSTED-WINONA-MOWER-FILLMORE-HOUSTON-LA CROSSE-MONROE- JUNEAU-ADAMS-VERNON-CRAWFORD-RICHLAND- INCLUDING THE CITIES OF...DECORAH...WAUKON...CHARLES CITY... ROCHESTER...WINONA...AUSTIN...LA CROSSE...SPARTA/TOMAH... MAUSTON...VIROQUA...PRAIRIE DU CHIEN...RICHLAND CENTER 756 PM CST FRI FEB 20 2009 ...WINTER WEATHER ADVISORY REMAINS IN EFFECT UNTIL NOON CST SATURDAY... A WINTER WEATHER ADVISORY REMAINS IN EFFECT UNTIL NOON CST SATURDAY. SNOW WILL CONTINUE SPREADING FROM SOUTHEAST MINNESOTA AND NORTHEAST IOWA INTO WESTERN WISCONSIN THIS EVENING...REACHING CENTRAL WISCONSIN AND THE INTERSTATE 94 CORRIDOR BETWEEN 8 PM AND 10 PM. VISIBILITY SHOULD DROP STEADILY ONCE THE SNOW BEGINS. SNOW WILL BE MODERATE TO LOCALLY HEAVY AT TIMES TONIGHT THEN TAPER OFF SATURDAY MORNING. SNOW AMOUNTS OF 3 TO 6 INCHES ARE POSSIBLE THROUGH SATURDAY MORNING. NORTHWEST WINDS WILL INCREASE LATE TONIGHT AND SATURDAY MORNING AS THE LOW PULLS AWAY. THESE WINDS WILL CREATE SOME BLOWING AND DRIFTING OF THE NEW SNOW IN OPEN COUNTRY AND ACROSS THE RIDGE TOPS. PRECAUTIONARY/PREPAREDNESS ACTIONS... A WINTER WEATHER ADVISORY FOR SNOW MEANS THAT PERIODS OF SNOW WILL CAUSE PRIMARILY TRAVEL DIFFICULTIES. BE PREPARED FOR SNOW COVERED ROADS AND LIMITED VISIBILITIES...AND USE CAUTION WHILE DRIVING. && $$ THOMPSON WEATHER.GOV/LACROSSE
000 WWUS43 KARX 210348 WSWARX URGENT - WINTER WEATHER MESSAGE NATIONAL WEATHER SERVICE LA CROSSE WI 948 PM CST FRI FEB 20 2009 ...ACCUMULATING SNOW FOR THE AREA TONIGHT INTO SATURDAY MORNING... .A VIGOROUS STORM SYSTEM WILL PUSH ACROSS IOWA AND INTO NORTHERN ILLINOIS TONIGHT. THIS SYSTEM IS EXPECTED TO BRING MODERATE TO HEAVY SNOW AT TIMES ACROSS PORTIONS OF SOUTHEAST MINNESOTA... NORTHEAST IOWA AND SOUTHWEST WISCONSIN TONIGHT. THE HEAVIEST SNOW IS EXPECTED TO FALL GENERALLY SOUTH OF A WEST UNION IOWA...TO BOSCOBEL WISCONSIN LINE...WHERE 5 TO 7 INCHES OF SNOW IS LIKELY... WITH LESSER AMOUNTS OF 3 TO 6 INCHES NORTH OF THIS LINE. THIS SNOW WILL TAPER OFF SATURDAY MORNING...BUT GUSTY NORTHERLY WINDS SHOULD CAUSE BLOWING AND DRIFTING. IAZ029-030-WIZ061-211200- /O.CON.KARX.WS.W.0002.000000T0000Z-090221T1800Z/ FAYETTE-CLAYTON-GRANT- INCLUDING THE CITIES OF...OELWEIN...PLATTEVILLE 948 PM CST FRI FEB 20 2009 ...WINTER STORM WARNING REMAINS IN EFFECT UNTIL NOON CST SATURDAY... A WINTER STORM WARNING REMAINS IN EFFECT UNTIL NOON CST SATURDAY. SNOW WILL CONTINUE SPREADING FROM NORTHEAST IOWA INTO SOUTHWEST WISCONSIN THIS EVENING. SNOWFALL RATES POSSIBLY UP TO AN INCH PER HOUR COULD OCCUR FROM AROUND OELWEIN AND ELKADER IOWA...TOWARD THE WISCONSIN RIVER AREA AND POINTS SOUTHWARD ACROSS SOUTHWEST WISCONSIN. VISIBILITY WILL BE POOR IN THESE LOCATIONS...GENERALLY AROUND A MILE. SNOW WILL CONTINUE TO BE MODERATE TO LOCALLY HEAVY AT TIMES TONIGHT THEN TAPER OFF SATURDAY MORNING. SNOW AMOUNTS OF 5 TO 7 INCHES ARE POSSIBLE THROUGH SATURDAY MORNING. NORTHWEST WINDS WILL INCREASE LATE TONIGHT AND SATURDAY MORNING AS THE LOW PULLS AWAY. THESE WINDS WILL CREATE SOME BLOWING AND DRIFTING OF THE NEW SNOW IN OPEN COUNTRY AND ACROSS THE RIDGE TOPS. PRECAUTIONARY/PREPAREDNESS ACTIONS... A WINTER STORM WARNING FOR HEAVY SNOW MEANS SEVERE WINTER WEATHER CONDITIONS ARE EXPECTED OR OCCURRING. SIGNIFICANT AMOUNTS OF SNOW ARE FORECAST THAT WILL MAKE TRAVEL DANGEROUS. ONLY TRAVEL IN AN EMERGENCY. IF YOU MUST TRAVEL...KEEP AN EXTRA FLASHLIGHT...FOOD... AND WATER IN YOUR VEHICLE IN CASE OF AN EMERGENCY. && $$ IAZ008>011-018-019-MNZ079-086>088-094>096-WIZ041>044-053>055- 211200- /O.CON.KARX.WW.Y.0006.000000T0000Z-090221T1800Z/ MITCHELL-HOWARD-WINNESHIEK-ALLAMAKEE-FLOYD-CHICKASAW-WABASHA- DODGE-OLMSTED-WINONA-MOWER-FILLMORE-HOUSTON-LA CROSSE-MONROE- JUNEAU-ADAMS-VERNON-CRAWFORD-RICHLAND- INCLUDING THE CITIES OF...DECORAH...WAUKON...CHARLES CITY... ROCHESTER...WINONA...AUSTIN...LA CROSSE...SPARTA/TOMAH... MAUSTON...VIROQUA...PRAIRIE DU CHIEN...RICHLAND CENTER 948 PM CST FRI FEB 20 2009 ...WINTER WEATHER ADVISORY REMAINS IN EFFECT UNTIL NOON CST SATURDAY... A WINTER WEATHER ADVISORY REMAINS IN EFFECT UNTIL NOON CST SATURDAY. SNOW WILL CONTINUE SPREADING FROM SOUTHEAST MINNESOTA AND NORTHEAST IOWA INTO WESTERN AND CENTRAL WISCONSIN THIS EVENING. SOME OF THE HIGHER SNOWFALL RATES...POSSIBLY UP TO AN INCH PER HOUR...COULD OCCUR IN LOCATIONS ALONG THE MISSISSIPPI RIVER EASTWARD INTO CENTRAL WISCONSIN...INCLUDING THE INTERSTATE 90 AND 94 CORRIDORS. SNOW WILL BE MODERATE TO LOCALLY HEAVY AT TIMES TONIGHT THEN TAPER OFF SATURDAY MORNING. SNOW AMOUNTS OF 3 TO 6 INCHES ARE POSSIBLE THROUGH SATURDAY MORNING. NORTHWEST WINDS WILL INCREASE LATE TONIGHT AND SATURDAY MORNING AS THE LOW PULLS AWAY. THESE WINDS WILL CREATE SOME BLOWING AND DRIFTING OF THE NEW SNOW IN OPEN COUNTRY AND ACROSS THE RIDGE TOPS. PRECAUTIONARY/PREPAREDNESS ACTIONS... A WINTER WEATHER ADVISORY FOR SNOW MEANS THAT PERIODS OF SNOW WILL CAUSE PRIMARILY TRAVEL DIFFICULTIES. BE PREPARED FOR SNOW COVERED ROADS AND LIMITED VISIBILITIES...AND USE CAUTION WHILE DRIVING. && $$ THOMPSON WEATHER.GOV/LACROSSE
000 WWUS43 KARX 210545 WSWARX URGENT - WINTER WEATHER MESSAGE NATIONAL WEATHER SERVICE LA CROSSE WI 1145 PM CST FRI FEB 20 2009 ...ACCUMULATING SNOW FOR THE AREA TONIGHT INTO SATURDAY MORNING... .A VIGOROUS STORM SYSTEM WILL PUSH ACROSS IOWA AND INTO NORTHERN ILLINOIS TONIGHT. THIS SYSTEM IS EXPECTED TO BRING MODERATE TO HEAVY SNOW AT TIMES ACROSS PORTIONS OF SOUTHEAST MINNESOTA... NORTHEAST IOWA AND SOUTHWEST WISCONSIN TONIGHT. THE HEAVIEST SNOW IS EXPECTED TO FALL GENERALLY SOUTH OF A WEST UNION IOWA...TO BOSCOBEL WISCONSIN LINE...WHERE 5 TO 7 INCHES OF SNOW IS LIKELY... WITH LESSER AMOUNTS OF 3 TO 6 INCHES NORTH OF THIS LINE. THIS SNOW WILL TAPER OFF SATURDAY MORNING...BUT GUSTY NORTHERLY WINDS SHOULD CAUSE BLOWING AND DRIFTING. IAZ029-030-WIZ061-211345- /O.CON.KARX.WS.W.0002.000000T0000Z-090221T1800Z/ FAYETTE-CLAYTON-GRANT- INCLUDING THE CITIES OF...OELWEIN...PLATTEVILLE 1145 PM CST FRI FEB 20 2009 ...WINTER STORM WARNING REMAINS IN EFFECT UNTIL NOON CST SATURDAY... A WINTER STORM WARNING REMAINS IN EFFECT UNTIL NOON CST SATURDAY. SNOW WILL CONTINUE INTO THE OVERNIGHT HOURS FROM NORTHEAST IOWA INTO SOUTHWEST WISCONSIN. SNOWFALL RATES POSSIBLY UP TO AN INCH PER HOUR COULD OCCUR FROM AROUND OELWEIN AND WEST UNION AREAS TOWARD ELKADER IOWA...THEN TO THE WISCONSIN RIVER AREA AND POINTS SOUTHWARD ACROSS SOUTHWEST WISCONSIN. VISIBILITY WILL BE POOR IN THESE LOCATIONS...GENERALLY AROUND A MILE. SNOW WILL CONTINUE TO BE MODERATE TO LOCALLY HEAVY AT TIMES TONIGHT THEN TAPER OFF SATURDAY MORNING. SNOW AMOUNTS OF 5 TO 7 INCHES ARE POSSIBLE THROUGH SATURDAY MORNING. NORTHWEST WINDS WILL INCREASE LATE TONIGHT AND SATURDAY MORNING AS THE LOW PULLS AWAY. THESE WINDS WILL CREATE SOME BLOWING AND DRIFTING OF THE NEW SNOW IN OPEN COUNTRY AND ACROSS THE RIDGE TOPS. PRECAUTIONARY/PREPAREDNESS ACTIONS... A WINTER STORM WARNING FOR HEAVY SNOW MEANS SEVERE WINTER WEATHER CONDITIONS ARE EXPECTED OR OCCURRING. SIGNIFICANT AMOUNTS OF SNOW ARE FORECAST THAT WILL MAKE TRAVEL DANGEROUS. ONLY TRAVEL IN AN EMERGENCY. IF YOU MUST TRAVEL...KEEP AN EXTRA FLASHLIGHT...FOOD... AND WATER IN YOUR VEHICLE IN CASE OF AN EMERGENCY. && $$ IAZ008>011-018-019-MNZ079-086>088-094>096-WIZ041>044-053>055- 211345- /O.CON.KARX.WW.Y.0006.000000T0000Z-090221T1800Z/ MITCHELL-HOWARD-WINNESHIEK-ALLAMAKEE-FLOYD-CHICKASAW-WABASHA- DODGE-OLMSTED-WINONA-MOWER-FILLMORE-HOUSTON-LA CROSSE-MONROE- JUNEAU-ADAMS-VERNON-CRAWFORD-RICHLAND- INCLUDING THE CITIES OF...DECORAH...WAUKON...CHARLES CITY... ROCHESTER...WINONA...AUSTIN...LA CROSSE...SPARTA/TOMAH... MAUSTON...VIROQUA...PRAIRIE DU CHIEN...RICHLAND CENTER 1145 PM CST FRI FEB 20 2009 ...WINTER WEATHER ADVISORY REMAINS IN EFFECT UNTIL NOON CST SATURDAY... A WINTER WEATHER ADVISORY REMAINS IN EFFECT UNTIL NOON CST SATURDAY. SNOW WILL CONTINUE INTO THE OVERNIGHT HOURS FROM SOUTHEAST MINNESOTA AND NORTHEAST IOWA INTO WESTERN AND CENTRAL WISCONSIN. SOME OF THE HIGHER SNOWFALL RATES...POSSIBLY UP TO AN INCH PER HOUR...COULD OCCUR ESPECIALLY IN LOCATIONS ALONG THE MISSISSIPPI RIVER EASTWARD INTO CENTRAL WISCONSIN...INCLUDING THE INTERSTATE 90 AND 94 CORRIDORS. IN ADDITION...AREAS GENERALLY ALONG AND WEST OF A LINE FROM CHARLES CITY IOWA TOWARD AUSTIN AND DODGE CENTER MINNESOTA SHOULD EXPERIENCE A SUDDEN WIND SHIFT TO THE NORTHWEST WITH GUSTS TO AROUND 25 MPH...WHICH WOULD CAUSE BLOWING AND DRIFTING SNOW. SNOW WILL BE MODERATE TO LOCALLY HEAVY AT TIMES TONIGHT THEN TAPER OFF SATURDAY MORNING. SNOW AMOUNTS OF 3 TO 6 INCHES ARE POSSIBLE THROUGH SATURDAY MORNING. NORTHWEST WINDS WILL INCREASE LATE TONIGHT AND SATURDAY MORNING AS THE LOW PULLS AWAY. THESE WINDS WILL CREATE SOME BLOWING AND DRIFTING OF THE NEW SNOW IN OPEN COUNTRY AND ACROSS THE RIDGE TOPS. PRECAUTIONARY/PREPAREDNESS ACTIONS... A WINTER WEATHER ADVISORY FOR SNOW MEANS THAT PERIODS OF SNOW WILL CAUSE PRIMARILY TRAVEL DIFFICULTIES. BE PREPARED FOR SNOW COVERED ROADS AND LIMITED VISIBILITIES...AND USE CAUTION WHILE DRIVING. && $$ THOMPSON WEATHER.GOV/LACROSSE
000 WWUS43 KARX 210812 WSWARX URGENT - WINTER WEATHER MESSAGE NATIONAL WEATHER SERVICE LA CROSSE WI 212 AM CST SAT FEB 21 2009 ...SNOW WILL CONTINUE THROUGH THIS MORNING... .A VIGOROUS STORM SYSTEM MOVING SOUTHEAST THROUGH SOUTHERN MINNESOTA EARLY THIS MORNING WILL PUSH ACROSS NORTHEAST IOWA AND INTO NORTHERN ILLINOIS BY MID MORNING. THIS WILL BRING MODERATE TO HEAVY SNOW AT TIMES ACROSS PORTIONS OF SOUTHEAST MINNESOTA...INTO NORTHEAST IOWA AND SOUTHWEST WISCONSIN THROUGH THIS MORNING. THROUGH MID MORNING...THE HEAVIEST SNOW IS EXPECTED TO FALL GENERALLY SOUTH OF A WEST UNION IOWA...TO BOSCOBEL WISCONSIN LINE...WHERE 5 TO 7 INCHES OF SNOW IS LIKELY. LESSER AMOUNTS OF 3 TO 6 INCHES IS EXPECTED NORTH OF THIS LINE. THIS SNOW WILL TAPER OFF LATER SATURDAY MORNING...BUT GUSTY NORTHERLY WINDS ON THE BACK SIDE OF THE STORM SYSTEM WILL LIKELY CAUSE AREAS OF BLOWING AND DRIFTING. IAZ029-030-WIZ061-211615- /O.CON.KARX.WS.W.0002.000000T0000Z-090221T1800Z/ FAYETTE-CLAYTON-GRANT- INCLUDING THE CITIES OF...OELWEIN...PLATTEVILLE 212 AM CST SAT FEB 21 2009 ...WINTER STORM WARNING REMAINS IN EFFECT UNTIL NOON CST TODAY... A WINTER STORM WARNING REMAINS IN EFFECT UNTIL NOON CST TODAY. SNOW WILL CONTINUE THROUGH THIS MORNING FROM NORTHEAST IOWA INTO SOUTHWEST WISCONSIN. SNOWFALL RATES APPROACHING AN INCH PER HOUR COULD OCCUR FROM AROUND OELWEIN AND WEST UNION AREAS TOWARD ELKADER IOWA...THEN TO THE WISCONSIN RIVER AREA AND POINTS SOUTHWARD ACROSS SOUTHWEST WISCONSIN. VISIBILITY WILL BE POOR IN THESE LOCATIONS...GENERALLY AROUND A MILE OR LESS. THE SNOW IS EXPECTED TO TAPER OFF LATER THIS MORNING. SNOW AMOUNTS OF 5 TO 7 INCHES ARE POSSIBLE THROUGH THIS MORNING. NORTHWEST WINDS WILL PICK UP THIS MORNING AS THE LOW PULLS AWAY FROM THE AREA. THESE WINDS WILL CREATE SOME BLOWING AND DRIFTING OF THE NEWLY FALLEN SNOW...ESPECIALLY IN OPEN COUNTRY AND ACROSS RIDGE TOPS. PRECAUTIONARY/PREPAREDNESS ACTIONS... A WINTER STORM WARNING FOR HEAVY SNOW MEANS SEVERE WINTER WEATHER CONDITIONS ARE EXPECTED OR OCCURRING. SIGNIFICANT AMOUNTS OF SNOW ARE FORECAST THAT WILL MAKE TRAVEL DANGEROUS. ONLY TRAVEL IN AN EMERGENCY. IF YOU MUST TRAVEL...KEEP AN EXTRA FLASHLIGHT...FOOD... AND WATER IN YOUR VEHICLE IN CASE OF AN EMERGENCY. && $$ IAZ008>011-018-019-MNZ079-086>088-094>096-WIZ041>044-053>055- 211615- /O.CON.KARX.WW.Y.0006.000000T0000Z-090221T1800Z/ MITCHELL-HOWARD-WINNESHIEK-ALLAMAKEE-FLOYD-CHICKASAW-WABASHA- DODGE-OLMSTED-WINONA-MOWER-FILLMORE-HOUSTON-LA CROSSE-MONROE- JUNEAU-ADAMS-VERNON-CRAWFORD-RICHLAND- INCLUDING THE CITIES OF...DECORAH...WAUKON...CHARLES CITY... ROCHESTER...WINONA...AUSTIN...LA CROSSE...SPARTA/TOMAH... MAUSTON...VIROQUA...PRAIRIE DU CHIEN...RICHLAND CENTER 212 AM CST SAT FEB 21 2009 ...WINTER WEATHER ADVISORY REMAINS IN EFFECT UNTIL NOON CST TODAY... A WINTER WEATHER ADVISORY REMAINS IN EFFECT UNTIL NOON CST TODAY. SNOW WILL CONTINUE ACROSS THE AREA THROUGH THIS MORNING. SOME HIGHER SNOWFALL RATES APPROACHING AN INCH PER HOUR...COULD OCCUR IN LOCATIONS ALONG THE MISSISSIPPI RIVER AND EASTWARD INTO CENTRAL WISCONSIN...WHICH INCLUDES THE INTERSTATE 90 AND 94 CORRIDORS. IN ADDITION...AREAS GENERALLY ALONG AND WEST OF A LINE FROM CHARLES CITY IOWA TOWARD AUSTIN AND DODGE CENTER MINNESOTA WILL SEE NORTHWEST WITH GUSTS TO 30 MPH. THIS WILL CAUSE AREAS OF BLOWING AND DRIFTING SNOW. THE SNOW IS EXPECTED TO TAPER OFF LATER THIS MORNING. SNOW AMOUNTS OF 3 TO 6 INCHES ARE POSSIBLE THROUGH THIS MORNING. NORTHWEST WINDS WILL ALSO INCREASE THROUGH SATURDAY MORNING AS THE LOW PULLS AWAY FROM THE AREA. THIS WILL PRODUCE SOME BLOWING AND DRIFTING OF THE NEWLY FALLEN SNOW IN OPEN COUNTRY AND ACROSS RIDGE TOPS. PRECAUTIONARY/PREPAREDNESS ACTIONS... A WINTER WEATHER ADVISORY FOR SNOW MEANS THAT PERIODS OF SNOW WILL CAUSE PRIMARILY TRAVEL DIFFICULTIES. BE PREPARED FOR SNOW COVERED ROADS AND LIMITED VISIBILITIES...AND USE CAUTION WHILE DRIVING. && $$ DAS WEATHER.GOV/LACROSSE
000 WWUS43 KARX 211009 WSWARX URGENT - WINTER WEATHER MESSAGE NATIONAL WEATHER SERVICE LA CROSSE WI 409 AM CST SAT FEB 21 2009 ...SNOW CONTINUES THIS MORNING... .A VIGOROUS STORM SYSTEM MOVING ACROSS SOUTHEAST MINNESOTA AND NORTHEAST IOWA WILL MOVE INTO NORTHERN ILLINOIS BY MID MORNING. THIS WILL CONTINUE TO PRODUCE SNOW ACROSS PORTIONS OF SOUTHEAST MINNESOTA... INTO NORTHEAST IOWA AND SOUTHWEST WISCONSIN THROUGH THIS MORNING. THROUGH MID MORNING...THE HEAVIEST SNOW IS EXPECTED TO FALL GENERALLY ALONG AND SOUTH OF INTERSTATE 90 WHERE TOTAL SNOWFALL IS EXPECTED TO BE IN THE 3 TO 6 INCH RANGE. LESSER AMOUNTS ARE EXPECTED TO THE NORTH. THE SNOW WILL TAPER OFF LATER THIS MORNING...BUT GUSTY NORTHERLY WINDS ON THE BACK SIDE OF THE STORM SYSTEM WILL LIKELY CAUSE AREAS OF BLOWING AND DRIFTING. IAZ029-030-WIZ061-211800- /O.CAN.KARX.WS.W.0002.000000T0000Z-090221T1800Z/ /O.EXA.KARX.WW.Y.0006.000000T0000Z-090221T1800Z/ FAYETTE-CLAYTON-GRANT- INCLUDING THE CITIES OF...OELWEIN...PLATTEVILLE 409 AM CST SAT FEB 21 2009 ...WINTER WEATHER ADVISORY IN EFFECT UNTIL NOON CST TODAY... ...WINTER STORM WARNING IS CANCELLED... THE NATIONAL WEATHER SERVICE IN LA CROSSE HAS ISSUED A WINTER WEATHER ADVISORY FOR SNOW...WHICH IS IN EFFECT UNTIL NOON CST TODAY. THE WINTER STORM WARNING HAS BEEN CANCELLED. SNOW WILL CONTINUE ACROSS THE AREA THIS MORNING. SNOWFALL RATES COULD APPROACH AN INCH PER HOUR AT TIMES BEFORE TAPERING OFF LATER THIS MORNING. TOTAL SNOW AMOUNTS OF 3 TO 6 INCHES CAN BE EXPECTED. IN ADDITION...SOME BLOWING AND DRIFTING SNOW WILL BE SEEN AS THE RESULT OF INCREASING NORTHWEST WINDS. THIS WILL BE ESPECIALLY TRUE IN THE OPEN AREAS AND ON RIDGE TOPS. IF TRAVELING...USE CAUTION AND BE PREPARED FOR REDUCED VISIBILITY AND SLIPPERY ROADWAYS. PRECAUTIONARY/PREPAREDNESS ACTIONS... A WINTER WEATHER ADVISORY FOR SNOW MEANS THAT PERIODS OF SNOW WILL CAUSE PRIMARILY TRAVEL DIFFICULTIES. BE PREPARED FOR SNOW COVERED ROADS AND LIMITED VISIBILITIES...AND USE CAUTION WHILE DRIVING. && $$ IAZ008>011-018-019-MNZ079-086>088-094>096-WIZ041>044-053>055- 211800- /O.CON.KARX.WW.Y.0006.000000T0000Z-090221T1800Z/ MITCHELL-HOWARD-WINNESHIEK-ALLAMAKEE-FLOYD-CHICKASAW-WABASHA- DODGE-OLMSTED-WINONA-MOWER-FILLMORE-HOUSTON-LA CROSSE-MONROE- JUNEAU-ADAMS-VERNON-CRAWFORD-RICHLAND- INCLUDING THE CITIES OF...DECORAH...WAUKON...CHARLES CITY... ROCHESTER...WINONA...AUSTIN...LA CROSSE...SPARTA/TOMAH... MAUSTON...VIROQUA...PRAIRIE DU CHIEN...RICHLAND CENTER 409 AM CST SAT FEB 21 2009 ...WINTER WEATHER ADVISORY REMAINS IN EFFECT UNTIL NOON CST TODAY... A WINTER WEATHER ADVISORY REMAINS IN EFFECT UNTIL NOON CST TODAY. SNOW WILL CONTINUE ACROSS THE AREA THROUGH THIS MORNING. SOME HIGHER SNOWFALL RATES APPROACHING AN INCH PER HOUR...COULD OCCUR IN LOCATIONS ALONG THE MISSISSIPPI RIVER AND EASTWARD INTO CENTRAL WISCONSIN...WHICH INCLUDES THE INTERSTATE 90 AND 94 CORRIDORS. IN ADDITION...AREAS GENERALLY ALONG AND WEST OF A LINE FROM CHARLES CITY IOWA TOWARD AUSTIN AND DODGE CENTER MINNESOTA WILL SEE NORTHWEST WITH GUSTS TO 30 MPH. THIS WILL CAUSE AREAS OF BLOWING AND DRIFTING SNOW. THE SNOW IS EXPECTED TO TAPER OFF LATER THIS MORNING WITH TOTAL SNOW AMOUNTS OF 3 TO 6 INCHES EXPECTED. IN ADDITION...NORTHWEST WINDS WILL ALSO INCREASE THIS MORNING AS THE LOW PULLS AWAY FROM THE AREA. THIS WILL PRODUCE SOME BLOWING AND DRIFTING OF THE NEWLY FALLEN SNOW IN OPEN COUNTRY AND ACROSS RIDGE TOPS. IF TRAVELING...USE CAUTION AND BE PREPARED FOR REDUCED VISIBILITY AND SLIPPERY ROADWAYS. PRECAUTIONARY/PREPAREDNESS ACTIONS... A WINTER WEATHER ADVISORY FOR SNOW MEANS THAT PERIODS OF SNOW WILL CAUSE PRIMARILY TRAVEL DIFFICULTIES. BE PREPARED FOR SNOW COVERED ROADS AND LIMITED VISIBILITIES...AND USE CAUTION WHILE DRIVING. && $$ DAS WEATHER.GOV/LACROSSE
What forecasters said that day
The local office's own words before this winter storm warning 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 winter storm warning went out at Feb 20, 3:20 PM CST, 14 minutes earlier.
Area forecast discussion, Feb 20, 3:20 PM CST, 14 minutes before
AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE LA CROSSE WI
320 PM CST FRI FEB 20 2009
.SHORT TERM...TONIGHT THROUGH MONDAY NIGHT
FORECAST FOCUS IS ON THE SNOW FOR TONIGHT...AMOUNTS AND HEADLINES.
UPPER LEVEL SHORTWAVE TROUGH DRIVING ACROSS THE NORTHERN
PLAINS...PER LATEST WATER VAPOR IMAGERY...AND WILL CONTINUE ITS
SOUTHEAST DIVE INTO IOWA BY 06Z TONIGHT...THEN SWINGING DUE EAST
ACROSS THE EASTERN GREAT LAKES BY 00Z SUN. STRONG QG CONVERGENCE
THROUGH THE LAYERS WITH THIS SYSTEM AS IT MOVES ACROSS THE REGION
TONIGHT...WITH THE STRONGEST LOW LEVEL THERMODYNAMIC AND ISENTROPIC
RESPONSE ACROSS IA AND ILL. SOME WEAK 2D-FRONTOGENETIC FORCING
INDICATED MOSTLY NORTH/WEST OF THE ASSOCIATED SFC LOW...PER A
NORTH-SOUTH RUNNING TIME/HEIGHT X-SECTION. THE 20.12Z GFS IS MUCH
STRONGER ALOFT THOUGH...AROUND 400 MB...THAN THE NAM. CONTINUING TO
LOOK AT THIS X-SECTION...BOTH THE GFS AND NAM HAVE AMPLE SATURATION
TONIGHT THROUGH SAT MORNING...WITH A GOOD OMEGA RESPONSE IN THE
DENDRITIC GROWTH ZONE. BUFKIT SOUNDINGS SHOW THAT THIS FAVORABLE
LIFT/TEMP LAYER COUPLET ISN/T ALL THAT DEEP FOR NORTHERN PARTS OF
THE FORECAST AREA...BUT BETTER TO THE SOUTH...ESPECIALLY BETWEEN
06-15Z. 20.09Z SREF ALSO FAVORS A SWATH OF DEEPER LIFT THROUGH -12
TO -18 C FROM SOUTHEAST MN/NORTHEAST IA INTO SOUTHERN WI.
MEANWHILE...THE LEFT EXIT REGION OF A CURVED 300 MB JET MAX WILL
INCREASE THE LIFT ACROSS THE REGION. LIFT/MOISTURE CONTINUE TO POINT
TO BANDS OF SNOW DEVELOPING NORTH/WEST OF THE SFC LOW...SPREADING
ACROSS THE REGION TONIGHT...EXITING OVER THE EASTERN GREAT LAKES BY
SAT EVENING.
THE BIGGEST QUESTION OVER THE PAST SEVERAL DAYS IS WHERE THIS MAIN
SNOW BAND WOULD MOVE. TRENDS IN THE GFS HAVE BEEN TO DROP THE BULK
OF THE SNOW JUST SOUTH OF THE LOCAL FORECAST AREA...WITH THE EC
LOOKING SIMILAR. THE NAM...MEANWHILE...HAS BEEN MUCH FARTHER
NORTH...BRINGING THE HEART OF THE SNOW TO THE FORECAST AREA...BUT
HAS ALSO BEEN THE OUTLIER. THE NEWEST 12Z MODELS RUNS IN MUCH BETTER
AGREEMENT THOUGH...LINING THIS MAIN SNOW BAND FROM SOUTH CENTRAL
MN...THROUGH NORTHEAST IA TONIGHT...AND THEN FOCUSED ACROSS SOUTHERN
WI/NORTHERN ILL ON SAT. 20.09Z SREF VERY SIMILAR TO THIS...JUST A
BIT FARTHER TO THE SOUTH AT THE ONSET OF THE SYSTEM. THE FORECAST
AREA WILL GET SNOW TONIGHT INTO SAT MORNING...BUT CONFIDENCE STILL A
BIT SHAKY ON WHERE THE HIGHER AMOUNTS WILL FALL. USING THE 12Z RUNS
WITH THE 09Z SREF...THE HIGHER SNOW TOTALS WOULD BE FAVORED ALONG
AND SOUTH OF ROCHESTER...TO LA CROSSE...TO NEW LISBON LINE.
HOWEVER...THE 20.15Z SREF IS LOWER WITH ITS QPF...AND PLACES IT MORE
ACROSS THE HEARTS OF THE FORECAST AREA.
HOW MUCH WILL FALL IS ALSO UNCERTAIN. COBB OUTPUT CONTINUES TO
PLACE THE NAM ON THE HIGH END OF THE SPECTRUM...WITH 6 TO 10 INCH
AMOUNTS IN THE AFOREMENTIONED FAVORED SNOW LOCATIONS. THE GFS IS
ABOUT 1/2 OF THAT. THE NAM HAS RAMPED UP ITS AMOUNTS OVER THE PAST
FEW RUNS...BUT THE 20.18Z RUN HAS JUST HALVED ITS PREVIOUS RUNS. THE
GFS HAS ALSO BEEN INCREASING...BUT NOT AS AGGRESSIVELY AS THE NAM.
WITH 15-1 RATIOS LOOKING REASONABLE...BELIEVE 4 TO 6 INCH AMOUNTS
ACROSS THE SOUTH ARE REALISTIC...DECREASING AS YOU MOVE NORTH.
HIGHER TOTALS ARE EXPECTED AS THE SYSTEM EXITS EAST AND
STRENGTHENS...AND THINK SOME 6+ INCH AMOUNTS COULD FALL OVER PARTS
OF FAR NORTHEAST IA AND SOUTHWEST WI. WILL UPGRADE THE ADVISORY TO A
WARNING TO COVER THIS THREAT. MEANWHILE FARTHER NORTH...WILL EXPAND
THE ADVISORY A BIT TO COVER THE SLIGHTLY HIGHER AMOUNTS EXPECTED.
OVERALL...SNOW WILL FALL ACROSS THE REGION TONIGHT INTO SATURDAY
MORNING. THE LATEST SREF //15Z// RUN IS LOWERING CONFIDENCE SOME IN
THE 12Z NAM/GFS...SO STILL SOME UNCERTAINTY WITH WHERE THE MAIN SNOW
BAND WILL FALL...AND JUST HOW MUCH. TRENDS/EVOLUTION WILL HAVE TO BE
MONITORED CLOSELY TONIGHT...AND ADJUSTMENTS MADE TO THE HEADLINES AS
NEEDED.
.LONG TERM...TUESDAY THROUGH FRIDAY
A ZONAL UPPER LEVEL FLOW RETURNS FOR THE BETTER PART OF NEXT
WEEK...LEADING TO SOME DIFFERENCES IN PLACEMENT/TIMING OF VARIOUS
SHORTWAVES MOVING ALONG THIS FLOW. BOTH THE GFS AND ECMWF WOULD
BRING SHORTWAVE ENERGY ACROSS THE REGION TUES NIGHT/WED...WITH THE
EC STRONGER/MORE DISTINCT WITH THIS FEATURE COMPARED TO THE WEAKER
GFS. THE EC THEN SLIDES ANOTHER SHORTWAVE TROUGH DUE EAST ACROSS THE
CENTRAL PLAINS...TO ACROSS THE OH RIVER VALLEY BY 12Z FRI. THE GFS
HAS A MUCH MORE MESSY AND BUSY PATTERN...BRINGING A COUPLE SHORTWAVE
TROUGHS THROUGH THE PLAINS TOWARD THE REGION...WHILE DROPPING A 500
MB TROUGH ACROSS THE NORTHERN PLAINS BY 12Z FRI. THE EC SOLUTION
WOULD KEEP THE BULK OF THE PCPN WITH THIS SYSTEM TO THE
SOUTH...WHILE THE GFS IS IN FAVOR OF WET/SNOWY CONDITIONS FOR THE
REGION THU/THU NIGHT. THERE HAS BEEN A TON OF VARIANCE WITHIN THE
GFS IN RESPECT TO THIS SYSTEM...WHILE THE ECMWF IS MORE CONSISTENT
OVER ITS PAST FEW RUNS. WILL TREND TOWARD THE EC AS A RESULT.
&&
.AVIATION...TONIGHT AND SATURDAY MORNING
A VIGOROUS SHORTWAVE AND ASSOCIATED SURFACE LOW OVER NORTH DAKOTA AT
MIDDAY WILL DROP SOUTHEAST ACROSS MINNESOTA AND IOWA THIS EVENING
AND INTO ILLINOIS BY LATE TONIGHT. SNOW WILL SPREAD SOUTHEAST INTO
THE TAF SITES BY EVENING. BEGINNING 22Z-00Z AT KRST AND 00Z-02Z AT
KLSE. WITH THE STRONG LIFT TO PASS ACROSS THE AREA CEILINGS AND
VISIBILITIES WILL DROP RAPIDLY INTO THE IFR CATEGORY WITH THE ONSET
OF THE SNOW. VISIBILITIES ARE EXPECTED TO DROP AS LOW AS ONE HALF
MILE AT TIMES DURING THE PEAK OF THE STORM WITH ANYWHERE FROM 3 TO 5
INCHES EXPECTED AT BOTH TAF SITES. THE LOW WILL DEEPEN AS IT MOVES
EAST OF THE AREA...WITH THE SNOW TAPERING OFF ACROSS THE TAF SITES
SATURDAY MORNING. A GENERAL IMPROVEMENT IN BOTH CEILINGS AND
VISIBILITIES ARE EXPECTED AS THE MORNING WEARS ON. ACCUMULATING
SNOWS TONIGHT AND EARLY SATURDAY MORNING WILL BE SUFFICIENT TO
HAMPER AIRPORT GROUND OPERATIONS AS WELL. IN ADDITION...NORTHWEST
WINDS WILL BEGIN TO PICK UP AS THE SYSTEM DEPARTS LATE TONIGHT AND
SATURDAY MORNING...WITH DRIFTING SNOW LIKELY TO CONTINUE TO HAMPER
GROUND OPERATIONS THROUGH 18Z SATURDAY.
RABERDING
&&
.ARX WATCHES/WARNINGS/ADVISORIES...
WI...WINTER WEATHER ADVISORY FROM 6 PM THIS EVENING TO NOON CST
SATURDAY FOR WIZ041-WIZ042-WIZ043-WIZ044-WIZ053-WIZ054-
WIZ055.
WINTER STORM WARNING FROM 6 PM THIS EVENING TO NOON CST
SATURDAY FOR WIZ061.
MN...WINTER WEATHER ADVISORY FROM 6 PM THIS EVENING TO NOON CST
SATURDAY FOR MNZ079-MNZ086-MNZ087-MNZ088-MNZ094-MNZ095-
MNZ096.
IA...WINTER WEATHER ADVISORY FROM 6 PM THIS EVENING TO NOON CST
SATURDAY FOR IAZ008-IAZ009-IAZ010-IAZ011-IAZ018-IAZ019.
WINTER STORM WARNING FROM 6 PM THIS EVENING TO NOON CST
SATURDAY FOR IAZ029-IAZ030.
&&
RIECKHazardous weather outlook, Feb 20, 5:00 AM CST, 10 hours 34 minutes before
HAZARDOUS WEATHER OUTLOOK NATIONAL WEATHER SERVICE LA CROSSE WI 500 AM CST FRI FEB 20 2009 IAZ008>011-018-019-029-030-MNZ086>088-094>096-WIZ053>055-061-211200- ALLAMAKEE-CHICKASAW-CLAYTON-CRAWFORD-DODGE-FAYETTE-FILLMORE-FLOYD- GRANT-HOUSTON-HOWARD-MITCHELL-MOWER-OLMSTED-RICHLAND-VERNON- WINNESHIEK-WINONA- 500 AM CST FRI FEB 20 2009 THIS HAZARDOUS WEATHER OUTLOOK IS FOR PARTS OF NORTHEAST IOWA... SOUTHWEST WISCONSIN...AND SOUTHEAST MINNESOTA. .DAY ONE...TODAY AND TONIGHT A WINTER WEATHER ADVISORY IS IN EFFECT FOR TONIGHT. SNOW WILL SPREAD ACROSS THE AREA LATE THIS AFTERNOON AND EARLY THIS EVENING...THEN CONTINUE ACROSS MUCH OF THE AREA THROUGH THE NIGHT. THE SNOW MAY BE MODERATE TO LOCALLY HEAVY AT TIMES. SNOW AMOUNTS OF 3 TO 4 INCHES ARE EXPECTED. .DAYS TWO THROUGH SEVEN...SATURDAY THROUGH THURSDAY THE WINTER WEATHER ADVISORY REMAINS IN EFFECT THROUGH SATURDAY MORNING. THE SNOW WILL TAPER OFF SATURDAY MORNING. ANOTHER INCH OR SO OF SNOWFALL IS POSSIBLE BEFORE THE SNOW TAPERS TO FLURRIES. BRISK NORTHWEST WINDS BEHIND THE DEPARTING LOW MAY CREATE SOME DRIFTING OF THE NEW SNOW IN OPEN COUNTRY AND ON THE RIDGE TOPS. ANOTHER SYSTEM WILL APPROACH AND MOVE ACROSS THE REGION CENTERED ON WEDNESDAY...BRINGING A SMALL CHANCE OF RAIN OR SNOW TO THE AREA FROM TUESDAY NIGHT INTO THURSDAY. DETAILS OF THIS SYSTEM REMAIN RATHER UNCERTAIN AT THIS TIME. .SPOTTER INFORMATION STATEMENT... SNOW FALL REPORTS WOULD BE APPRECIATED TONIGHT AND SATURDAY. .EMERGENCY MANAGEMENT COORDINATION... NO CALL IS SCHEDULED. MNZ079-WIZ017-029-032>034-041>044-211200- ADAMS-BUFFALO-CLARK-JACKSON-JUNEAU-LA CROSSE-MONROE-TAYLOR- TREMPEALEAU-WABASHA- 500 AM CST FRI FEB 20 2009 THIS HAZARDOUS WEATHER OUTLOOK IS FOR PARTS OF SOUTHEAST MINNESOTA AND WESTERN INTO CENTRAL WISCONSIN. .DAY ONE...TODAY AND TONIGHT SNOW WILL SPREAD ACROSS THE AREA LATE THIS AFTERNOON AND EARLY THIS EVENING...THEN CONTINUE ACROSS MUCH OF THE AREA THROUGH TONIGHT. SNOW AMOUNTS OF ONE-HALF TO ONE INCH ARE POSSIBLE NORTH AND EAST OF BLACK RIVER FALLS...WITH 2 TO 3 INCHES POSSIBLE ALONG AND SOUTH OF A LINE FROM LAKE CITY MINNESOTA TO SPARTA AND MAUSTON WISCONSIN. .DAYS TWO THROUGH SEVEN...SATURDAY THROUGH THURSDAY SOME LIGHT SNOW OR FLURRIES WILL LINGER OVER THE AREA SATURDAY... MAINLY IN THE MORNING. ANY ADDITIONAL ACCUMULATIONS WILL BE LESS THAN AN INCH. SOME BRISK NORTHWEST WINDS BEHIND THE DEPARTING LOW MAY CREATE SOME DRIFTING OF THE NEW SNOW IN OPEN COUNTRY. ANOTHER SYSTEM WILL APPROACH AND MOVE ACROSS THE REGION CENTERED ON WEDNESDAY...BRINGING A SMALL CHANCE OF RAIN OR SNOW TO THE AREA FROM TUESDAY NIGHT INTO THURSDAY. DETAILS OF THIS SYSTEM REMAIN RATHER UNCERTAIN AT THIS TIME. .SPOTTER INFORMATION STATEMENT... SNOW FALL REPORTS WOULD BE APPRECIATED TONIGHT AND SATURDAY. .EMERGENCY MANAGEMENT COORDINATION... NO CALL IS SCHEDULED. RRS
The office that day
Everything else NWS La Crosse, WI issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Feb 20, 3:37 AM CST | Winter Weather Advisory | ARX | Adams, Crawford, Grant, Juneau, La Crosse, Monroe and 2 more | 35 hr |
Nearby
Winter Storm Warnings in Iowa, 2009Winter Storm Warnings in Wisconsin, 2009Every winter storm 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; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.