Alert archive / Wisconsin / Dense Fog Advisories in 2012
Dense Fog Advisory 13, NWS La Crosse, WI
NWS La Crosse, WI issued this dense fog advisory at Nov 20, 2012, 5:45 PM CST for 4 counties in Iowa; 13 counties in Wisconsin; Houston County, Wabasha County, Winona County, Minnesota. It took effect at Nov 20, 2012, 6:00 PM CST. It was in force for 18 hr.
The area
The counties it named.
The facts
- Issued
- Nov 20, 2012, 5:45 PM CST (23:45 UTC)
- In effect from
- Nov 20, 2012, 6:00 PM CST
- Expired
- Nov 21, 2012, 11:33 AM CST
- In force
- 18 hr
- Issued by
- NWS La Crosse, WI
Counties Allamakee County, IA, Clayton County, IA, Fayette County, IA, Winneshiek County, IA, Houston County, MN, Wabasha County, MN, Winona County, MN, Adams County, WI, Buffalo County, WI, Clark County, WI, Crawford County, WI, Grant County, WI, Jackson County, WI, Juneau County, WI, La Crosse County, WI, Monroe County, WI, Richland County, WI, Taylor County, WI, Trempealeau County, WI, Vernon County, WI
The radar
The La Crosse radar (KARX), 10 km from the middle of the area, began a volume at 23:47 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, 11.8 hours before the alert went out and 232 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
- 1419 m above ground
- 0-6 km bulk shear
- 46 kt
- 0-1 km storm-relative helicity
- -5 m²/s²
- 0-3 km storm-relative helicity
- 51 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted, in the capitals the NWS used until 2016.
263 WWUS73 KARX 202345 NPWARX URGENT - WEATHER MESSAGE NATIONAL WEATHER SERVICE LA CROSSE WI 545 PM CST TUE NOV 20 2012 ...MORE DENSE FOG AGAIN TONIGHT... .DENSE FOG WILL ONCE AGAIN BLANKET PORTIONS OF SOUTHEAST MINNESOTA...NORTHEAST IOWA...AND SOUTHWEST INTO CENTRAL WISCONSIN TONIGHT INTO WEDNESDAY MORNING. DENSE FOG WAS ALREADY FORMING OVER PARTS OF THE AREA AS OF 530 PM...WITH VISIBILITIES REPORTED NEAR ZERO AROUND WINONA MINNESOTA...WESTBY WISCONSIN AND EDGEWOOD IOWA. THE FOG TONIGHT AND WEDNESDAY MORNING WILL REDUCE VISIBILITIES TO 1/4 MILE OR LESS IN PLACES...ESPECIALLY ON RIDGE-TOPS. PLAN ON THE FOG TO IMPACT TRAVEL TONIGHT AND THE MORNING RUSH HOUR...COMMUTE TIME WEDNESDAY MORNING. WIZ034-042>044-210745- /O.NEW.KARX.FG.Y.0013.121121T0300Z-121121T1600Z/ JACKSON-MONROE-JUNEAU-ADAMS- INCLUDING THE CITIES OF...BLACK RIVER FALLS...SPARTA...TOMAH... MAUSTON 545 PM CST TUE NOV 20 2012 ...DENSE FOG ADVISORY IN EFFECT FROM 9 PM THIS EVENING TO 10 AM CST WEDNESDAY... THE NATIONAL WEATHER SERVICE IN LA CROSSE HAS ISSUED A DENSE FOG ADVISORY...WHICH IS IN EFFECT FROM 9 PM THIS EVENING TO 10 AM CST WEDNESDAY. * VISIBILITIES WILL BE REDUCED TO A QUARTER MILE OR LESS AT TIMES FROM LATER THIS EVENING INTO WEDNESDAY MORNING. * MOTORISTS SHOULD BE PREPARED FOR REDUCED VISIBILITIES AND ALLOW EXTRA TRAVEL TIME TO REACH THEIR DESTINATIONS. PRECAUTIONARY/PREPAREDNESS ACTIONS... A DENSE FOG ADVISORY MEANS VISIBILITIES WILL FREQUENTLY BE REDUCED TO LESS THAN ONE QUARTER MILE. IF DRIVING...SLOW DOWN... USE YOUR HEADLIGHTS...AND LEAVE PLENTY OF DISTANCE AHEAD OF YOU. && $$ IAZ010-011-029-030-MNZ079-088-096-WIZ032-033-041-053>055-061- 210745- /O.NEW.KARX.FG.Y.0013.121121T0000Z-121121T1600Z/ WINNESHIEK-ALLAMAKEE-FAYETTE-CLAYTON-WABASHA-WINONA-HOUSTON- BUFFALO-TREMPEALEAU-LA CROSSE-VERNON-CRAWFORD-RICHLAND-GRANT- INCLUDING THE CITIES OF...DECORAH...WAUKON...OELWEIN...WINONA... LA CROSSE...VIROQUA...PRAIRIE DU CHIEN...RICHLAND CENTER... PLATTEVILLE 545 PM CST TUE NOV 20 2012 ...DENSE FOG ADVISORY IN EFFECT UNTIL 10 AM CST WEDNESDAY... THE NATIONAL WEATHER SERVICE IN LA CROSSE HAS ISSUED A DENSE FOG ADVISORY...WHICH IS IN EFFECT UNTIL 10 AM CST WEDNESDAY. * VISIBILITIES WILL BE REDUCED TO A QUARTER MILE OR LESS AT TIMES TONIGHT INTO WEDNESDAY MORNING. * MOTORISTS SHOULD BE PREPARED FOR REDUCED VISIBILITIES AND ALLOW EXTRA TRAVEL TIME TO REACH THEIR DESTINATIONS. PRECAUTIONARY/PREPAREDNESS ACTIONS... A DENSE FOG ADVISORY MEANS VISIBILITIES WILL FREQUENTLY BE REDUCED TO LESS THAN ONE QUARTER MILE. IF DRIVING...SLOW DOWN... USE YOUR HEADLIGHTS...AND LEAVE PLENTY OF DISTANCE AHEAD OF YOU. && $$ RRS WEATHER.GOV/LACROSSE
9 follow-up statements
872 WWUS73 KARX 210137 NPWARX URGENT - WEATHER MESSAGE NATIONAL WEATHER SERVICE LA CROSSE WI 737 PM CST TUE NOV 20 2012 ...MORE DENSE FOG AGAIN TONIGHT... .DENSE FOG CONTINUED TO FORM AND EXPAND ACROSS THE AREA AS OF 730 PM. VISIBILITIES IN MANY LOCATIONS FROM BLACK RIVER FALLS AND PLATTEVILLE WISCONSIN TO DECORAH IOWA AND WINONA MINNESOTA WERE A MILE OR LESS...WITH SEVERAL REPORTING LOCATIONS INDICATING VISIBILITIES OF ONE-QUARTER MILE OR LESS. THE DENSE FOG WILL CONTINUE TO EXPAND TONIGHT...WITH WIDESPREAD VISIBILITIES OF 1/4 MILE OR LESS BY LATE THIS EVENING INTO WEDNESDAY MORNING. PLAN ON THE FOG TO IMPACT TRAVEL TONIGHT...AND THE MORNING RUSH HOUR-COMMUTE TIME WEDNESDAY MORNING. WIZ034-042>044-210945- /O.CON.KARX.FG.Y.0013.121121T0300Z-121121T1600Z/ JACKSON-MONROE-JUNEAU-ADAMS- INCLUDING THE CITIES OF...BLACK RIVER FALLS...SPARTA...TOMAH... MAUSTON 737 PM CST TUE NOV 20 2012 ...DENSE FOG ADVISORY REMAINS IN EFFECT UNTIL 10 AM CST WEDNESDAY... * VISIBILITIES WILL BE REDUCED TO A QUARTER MILE OR LESS AT TIMES FROM LATER THIS EVENING INTO WEDNESDAY MORNING. * MOTORISTS SHOULD BE PREPARED FOR REDUCED VISIBILITIES AND ALLOW EXTRA TRAVEL TIME TO REACH THEIR DESTINATIONS. PRECAUTIONARY/PREPAREDNESS ACTIONS... A DENSE FOG ADVISORY MEANS VISIBILITIES WILL FREQUENTLY BE REDUCED TO LESS THAN ONE QUARTER MILE. IF DRIVING...SLOW DOWN... USE YOUR HEADLIGHTS...AND LEAVE PLENTY OF DISTANCE AHEAD OF YOU. && $$ IAZ010-011-029-030-MNZ079-088-096-WIZ032-033-041-053>055-061- 210945- /O.CON.KARX.FG.Y.0013.000000T0000Z-121121T1600Z/ WINNESHIEK-ALLAMAKEE-FAYETTE-CLAYTON-WABASHA-WINONA-HOUSTON- BUFFALO-TREMPEALEAU-LA CROSSE-VERNON-CRAWFORD-RICHLAND-GRANT- INCLUDING THE CITIES OF...DECORAH...WAUKON...OELWEIN...WINONA... LA CROSSE...VIROQUA...PRAIRIE DU CHIEN...RICHLAND CENTER... PLATTEVILLE 737 PM CST TUE NOV 20 2012 ...DENSE FOG ADVISORY REMAINS IN EFFECT UNTIL 10 AM CST WEDNESDAY... * VISIBILITIES WILL BE REDUCED TO A QUARTER MILE OR LESS AT TIMES TONIGHT INTO WEDNESDAY MORNING. * MOTORISTS SHOULD BE PREPARED FOR REDUCED VISIBILITIES AND ALLOW EXTRA TRAVEL TIME TO REACH THEIR DESTINATIONS. PRECAUTIONARY/PREPAREDNESS ACTIONS... A DENSE FOG ADVISORY MEANS VISIBILITIES WILL FREQUENTLY BE REDUCED TO LESS THAN ONE QUARTER MILE. IF DRIVING...SLOW DOWN... USE YOUR HEADLIGHTS...AND LEAVE PLENTY OF DISTANCE AHEAD OF YOU. && $$ RRS WEATHER.GOV/LACROSSE
878 WWUS73 KARX 210328 NPWARX URGENT - WEATHER MESSAGE NATIONAL WEATHER SERVICE LA CROSSE WI 928 PM CST TUE NOV 20 2012 ...DENSE FOG CONTINUING TO EXPAND... .DURING THE PAST HOUR DENSE FOG FOG HAS DEVELOPED ACROSS CENTRAL WISCONSIN. THE VISIBILITY AT BLACK RIVER FALLS HAS FALLEN TO ZERO AND SPARTA WAS REPORTING ONE QUARTER OF A MILE. WITH TEMPERATURES AT OR BELOW FREEZING ACROSS PARTS OF ADAMS...JACKSON...MONROE... AND JUNEAU COUNTIES...THESE AREAS MAY SEE SOME ICING TAKE PLACE. DENSE FOG CONTINUES TO REDUCE VISIBILITIES TO A QUARTER MILE OR LESS IN THE COUNTIES BORDERING BOTH THE MISSISSIPPI AND WISCONSIN RIVERS...AND IN WINNESHIEK AND FAYETTE COUNTIES IN NORTHEAST IOWA. PLAN ON THIS DENSE FOG TO IMPACT TRAVEL TONIGHT...AND DURING THE WEDNESDAY MORNING COMMUTE. WIZ034-042>044-211130- /O.CON.KARX.FG.Y.0013.000000T0000Z-121121T1600Z/ JACKSON-MONROE-JUNEAU-ADAMS- INCLUDING THE CITIES OF...BLACK RIVER FALLS...SPARTA...TOMAH... MAUSTON 928 PM CST TUE NOV 20 2012 ...DENSE FOG ADVISORY REMAINS IN EFFECT UNTIL 10 AM CST WEDNESDAY... * VISIBILITIES WILL BE REDUCED TO A QUARTER MILE OR LESS THROUGH WEDNESDAY MORNING. WITH TEMPERATURES AT OR BELOW FREEZING...THIS FOG MAY CAUSE SOME ICING TO TAKE PLACE. * MOTORISTS SHOULD BE PREPARED FOR REDUCED VISIBILITIES AND ALLOW EXTRA TRAVEL TIME TO REACH THEIR DESTINATIONS. PRECAUTIONARY/PREPAREDNESS ACTIONS... A DENSE FOG ADVISORY MEANS VISIBILITIES WILL FREQUENTLY BE REDUCED TO LESS THAN ONE QUARTER MILE. IF DRIVING...SLOW DOWN...USE YOUR HEADLIGHTS...AND LEAVE PLENTY OF DISTANCE AHEAD OF YOU. && $$ IAZ010-011-029-030-MNZ079-088-096-WIZ032-033-041-053>055-061- 211130- /O.CON.KARX.FG.Y.0013.000000T0000Z-121121T1600Z/ WINNESHIEK-ALLAMAKEE-FAYETTE-CLAYTON-WABASHA-WINONA-HOUSTON- BUFFALO-TREMPEALEAU-LA CROSSE-VERNON-CRAWFORD-RICHLAND-GRANT- INCLUDING THE CITIES OF...DECORAH...WAUKON...OELWEIN...WINONA... LA CROSSE...VIROQUA...PRAIRIE DU CHIEN...RICHLAND CENTER... PLATTEVILLE 928 PM CST TUE NOV 20 2012 ...DENSE FOG ADVISORY REMAINS IN EFFECT UNTIL 10 AM CST WEDNESDAY... * VISIBILITIES WILL BE REDUCED TO A QUARTER MILE OR LESS THROUGH WEDNESDAY MORNING. * MOTORISTS SHOULD BE PREPARED FOR REDUCED VISIBILITIES AND ALLOW EXTRA TRAVEL TIME TO REACH THEIR DESTINATIONS. PRECAUTIONARY/PREPAREDNESS ACTIONS... A DENSE FOG ADVISORY MEANS VISIBILITIES WILL FREQUENTLY BE REDUCED TO LESS THAN ONE QUARTER MILE. IF DRIVING...SLOW DOWN... USE YOUR HEADLIGHTS...AND LEAVE PLENTY OF DISTANCE AHEAD OF YOU. && $$ BOYNE WEATHER.GOV/LACROSSE
061 WWUS73 KARX 210628 NPWARX URGENT - WEATHER MESSAGE NATIONAL WEATHER SERVICE LA CROSSE WI 1228 AM CST WED NOV 21 2012 ...USE CAUTION TRAVELING THIS MORNING... .WIDESPREAD DENSE FOG REMAINS ACROSS MUCH OF SOUTHWEST INTO CENTRAL WISCONSIN...NEAR THE MISSISSIPPI RIVER IN SOUTHEAST MINNESOTA AND PORTIONS OF NORTHEAST IOWA. VISIBILITIES ARE NEAR ZERO WITHIN THE FOG. WITH TEMPERATURES AT OR BELOW FREEZING ACROSS PARTS OF ADAMS...JACKSON...MONROE...AND JUNEAU COUNTIES...THESE AREAS MAY SEE ICING TAKE PLACE ON BRIDGES AND OVERPASSES. DUE TO THE POOR VISIBILITIES...EXERCISE CAUTION WHEN TRAVELING THIS MORNING. TRAVELING THROUGH POOR LIT AREAS WILL EVEN BE MORE HAZARDOUS. PLAN ON THE DENSE FOG TO ALSO IMPACT THE MORNING COMMUTE. WIZ034-042>044-211430- /O.CON.KARX.FG.Y.0013.000000T0000Z-121121T1600Z/ JACKSON-MONROE-JUNEAU-ADAMS- INCLUDING THE CITIES OF...BLACK RIVER FALLS...SPARTA...TOMAH... MAUSTON 1228 AM CST WED NOV 21 2012 ...DENSE FOG ADVISORY REMAINS IN EFFECT UNTIL 10 AM CST THIS MORNING... * VISIBILITIES WILL BE REDUCED TO NEAR ZERO THROUGH MUCH OF THIS MORNING. WITH TEMPERATURES AT OR BELOW FREEZING...THIS FOG MAY CAUSE SOME ICING TO TAKE PLACE ON BRIDGES AND OVERPASSES. * MOTORISTS NEED TO USE CAUTION WHILE TRAVELING THIS MORNING...DUE TO THE COMBINATION OF POOR VISIBILITIES AND POTENTIAL FOR ICING. TRAVELING THROUGH POOR LIT AREAS WILL BE EVEN MORE HAZARDOUS. ALLOW PLENTY OF EXTRA TIME TO REACH YOUR DESTINATION. PRECAUTIONARY/PREPAREDNESS ACTIONS... A DENSE FOG ADVISORY MEANS VISIBILITIES WILL FREQUENTLY BE REDUCED TO LESS THAN ONE QUARTER MILE. IF DRIVING...SLOW DOWN... USE YOUR HEADLIGHTS...AND LEAVE PLENTY OF DISTANCE AHEAD OF YOU. && $$ IAZ010-011-029-030-MNZ079-088-096-WIZ032-033-041-053>055-061- 211430- /O.CON.KARX.FG.Y.0013.000000T0000Z-121121T1600Z/ WINNESHIEK-ALLAMAKEE-FAYETTE-CLAYTON-WABASHA-WINONA-HOUSTON- BUFFALO-TREMPEALEAU-LA CROSSE-VERNON-CRAWFORD-RICHLAND-GRANT- INCLUDING THE CITIES OF...DECORAH...WAUKON...OELWEIN...WINONA... LA CROSSE...VIROQUA...PRAIRIE DU CHIEN...RICHLAND CENTER... PLATTEVILLE 1228 AM CST WED NOV 21 2012 ...DENSE FOG ADVISORY REMAINS IN EFFECT UNTIL 10 AM CST THIS MORNING... * VISIBILITIES WILL BE REDUCED TO NEAR ZERO THROUGH MUCH OF THIS MORNING. * MOTORISTS NEED TO USE CAUTION WHILE TRAVELING THIS MORNING DUE TO THE POOR VISIBILITIES. TRAVELING THROUGH POOR LIT AREAS WILL BE EVEN MORE HAZARDOUS. ALLOW PLENTY OF EXTRA TIME TO REACH YOUR DESTINATION. PRECAUTIONARY/PREPAREDNESS ACTIONS... A DENSE FOG ADVISORY MEANS VISIBILITIES WILL FREQUENTLY BE REDUCED TO LESS THAN ONE QUARTER MILE. IF DRIVING...SLOW DOWN... USE YOUR HEADLIGHTS...AND LEAVE PLENTY OF DISTANCE AHEAD OF YOU. && $$ AJ WEATHER.GOV/LACROSSE
506 WWUS73 KARX 210740 NPWARX URGENT - WEATHER MESSAGE NATIONAL WEATHER SERVICE LA CROSSE WI 140 AM CST WED NOV 21 2012 ...USE CAUTION TRAVELING THIS MORNING... .WIDESPREAD DENSE FOG REMAINS ACROSS MUCH OF SOUTHWEST INTO CENTRAL WISCONSIN...NEAR THE MISSISSIPPI RIVER IN SOUTHEAST MINNESOTA AND PORTIONS OF NORTHEAST IOWA. VISIBILITIES ARE NEAR ZERO WITHIN THE FOG. IN ADDITION...THE DENSE FOG HAS EXPANDED INTO TAYLOR AND CLARK COUNTIES OF WISCONSIN AS OF 130 AM. WITH TEMPERATURES AT OR BELOW FREEZING ACROSS TAYLOR...CLARK... JACKSON...MONROE...JUNEAU AND ADAMS COUNTIES...THESE AREAS MAY SEE ICING TAKE PLACE ON BRIDGES AND OVERPASSES. DUE TO THE POOR VISIBILITIES...EXERCISE CAUTION WHEN TRAVELING THIS MORNING. TRAVELING THROUGH POOR LIT AREAS WILL EVEN BE MORE HAZARDOUS. PLAN ON THE DENSE FOG TO ALSO IMPACT THE MORNING COMMUTE. WIZ017-029-211545- /O.EXB.KARX.FG.Y.0013.000000T0000Z-121121T1800Z/ TAYLOR-CLARK- INCLUDING THE CITIES OF...MEDFORD...NEILLSVILLE 140 AM CST WED NOV 21 2012 ...DENSE FOG ADVISORY IN EFFECT UNTIL NOON CST TODAY... THE NATIONAL WEATHER SERVICE IN LA CROSSE HAS ISSUED A DENSE FOG ADVISORY...WHICH IS IN EFFECT UNTIL NOON CST TODAY. * VISIBILITIES WILL BE REDUCED TO NEAR ZERO THROUGH MUCH OF THIS MORNING. WITH TEMPERATURES AT OR BELOW FREEZING...THIS FOG MAY CAUSE SOME ICING TO TAKE PLACE ON BRIDGES AND OVERPASSES. * MOTORISTS NEED TO USE CAUTION WHILE TRAVELING THIS MORNING... DUE TO THE COMBINATION OF POOR VISIBILITIES AND POTENTIAL FOR ICING. TRAVELING THROUGH POOR LIT AREAS WILL BE EVEN MORE HAZARDOUS. ALLOW PLENTY OF EXTRA TIME TO REACH YOUR DESTINATION. PRECAUTIONARY/PREPAREDNESS ACTIONS... A DENSE FOG ADVISORY MEANS VISIBILITIES WILL FREQUENTLY BE REDUCED TO LESS THAN ONE QUARTER MILE. IF DRIVING...SLOW DOWN... USE YOUR HEADLIGHTS...AND LEAVE PLENTY OF DISTANCE AHEAD OF YOU. && $$ IAZ010-011-029-030-MNZ079-088-096-WIZ032-033-041-053>055-061- 211545- /O.EXT.KARX.FG.Y.0013.000000T0000Z-121121T1800Z/ WINNESHIEK-ALLAMAKEE-FAYETTE-CLAYTON-WABASHA-WINONA-HOUSTON- BUFFALO-TREMPEALEAU-LA CROSSE-VERNON-CRAWFORD-RICHLAND-GRANT- INCLUDING THE CITIES OF...DECORAH...WAUKON...OELWEIN...WINONA... LA CROSSE...VIROQUA...PRAIRIE DU CHIEN...RICHLAND CENTER... PLATTEVILLE 140 AM CST WED NOV 21 2012 ...DENSE FOG ADVISORY NOW IN EFFECT UNTIL NOON CST TODAY... * VISIBILITIES WILL BE REDUCED TO NEAR ZERO THROUGH MUCH OF THIS MORNING. * MOTORISTS NEED TO USE CAUTION WHILE TRAVELING THIS MORNING DUE TO THE POOR VISIBILITIES. TRAVELING THROUGH POOR LIT AREAS WILL BE EVEN MORE HAZARDOUS. ALLOW PLENTY OF EXTRA TIME TO REACH YOUR DESTINATION. PRECAUTIONARY/PREPAREDNESS ACTIONS... A DENSE FOG ADVISORY MEANS VISIBILITIES WILL FREQUENTLY BE REDUCED TO LESS THAN ONE QUARTER MILE. IF DRIVING...SLOW DOWN... USE YOUR HEADLIGHTS...AND LEAVE PLENTY OF DISTANCE AHEAD OF YOU. && $$ WIZ034-042>044-211545- /O.EXT.KARX.FG.Y.0013.000000T0000Z-121121T1800Z/ JACKSON-MONROE-JUNEAU-ADAMS- INCLUDING THE CITIES OF...BLACK RIVER FALLS...SPARTA...TOMAH... MAUSTON 140 AM CST WED NOV 21 2012 ...DENSE FOG ADVISORY NOW IN EFFECT UNTIL NOON CST TODAY... * VISIBILITIES WILL BE REDUCED TO NEAR ZERO THROUGH MUCH OF THIS MORNING. WITH TEMPERATURES AT OR BELOW FREEZING...THIS FOG MAY CAUSE SOME ICING TO TAKE PLACE ON BRIDGES AND OVERPASSES. * MOTORISTS NEED TO USE CAUTION WHILE TRAVELING THIS MORNING... DUE TO THE COMBINATION OF POOR VISIBILITIES AND POTENTIAL FOR ICING. TRAVELING THROUGH POOR LIT AREAS WILL BE EVEN MORE HAZARDOUS. ALLOW PLENTY OF EXTRA TIME TO REACH YOUR DESTINATION. PRECAUTIONARY/PREPAREDNESS ACTIONS... A DENSE FOG ADVISORY MEANS VISIBILITIES WILL FREQUENTLY BE REDUCED TO LESS THAN ONE QUARTER MILE. IF DRIVING...SLOW DOWN... USE YOUR HEADLIGHTS...AND LEAVE PLENTY OF DISTANCE AHEAD OF YOU. && $$ AJ WEATHER.GOV/LACROSSE
506 WWUS73 KARX 211042 NPWARX URGENT - WEATHER MESSAGE NATIONAL WEATHER SERVICE LA CROSSE WI 442 AM CST WED NOV 21 2012 ...USE CAUTION TRAVELING THIS MORNING... .WIDESPREAD DENSE FOG REMAINS ACROSS MUCH OF SOUTHWEST INTO CENTRAL WISCONSIN...NEAR THE MISSISSIPPI RIVER IN SOUTHEAST MINNESOTA AND PORTIONS OF NORTHEAST IOWA. VISIBILITIES ARE NEAR ZERO WITHIN THE FOG. WITH TEMPERATURES AT OR BELOW FREEZING ACROSS TAYLOR...CLARK... JACKSON...MONROE...JUNEAU AND ADAMS COUNTIES...THESE AREAS MAY SEE ICING TAKE PLACE ON BRIDGES AND OVERPASSES. DUE TO THE POOR VISIBILITIES...EXERCISE CAUTION WHEN TRAVELING THIS MORNING. TRAVELING THROUGH POOR LIT AREAS WILL EVEN BE MORE HAZARDOUS. PLAN ON THE DENSE FOG TO ALSO IMPACT THE MORNING COMMUTE. EXPECT INCREASING SOUTHERLY WINDS TODAY TO HELP DISSIPATE THE FOG. THIS HAS ALREADY OCCURRED IN WABASHA COUNTY...ALLOWING THE ADVISORY TO BE CANCELLED THERE. VISIBILITIES SHOULD BEGIN TO IMPROVE LATE THIS MORNING IN MOST LOCATIONS. MNZ079-211145- /O.CAN.KARX.FG.Y.0013.000000T0000Z-121121T1800Z/ WABASHA- 442 AM CST WED NOV 21 2012 ...DENSE FOG ADVISORY IS CANCELLED... THE NATIONAL WEATHER SERVICE IN LA CROSSE HAS CANCELLED THE DENSE FOG ADVISORY. INCREASING SOUTHERLY WINDS HAS ALLOWED MOST OF THE FOG TO DISSIPATE ACROSS WABASHA COUNTY. PATCHY DENSE FOG MAY STILL BE PRESENT ALONG THE MISSISSIPPI RIVER...BUT EXPECT THIS TO DISSIPATE BY 6 AM. $$ IAZ010-011-029-030-MNZ088-096-WIZ032-033-041-053>055-061-211800- /O.CON.KARX.FG.Y.0013.000000T0000Z-121121T1800Z/ WINNESHIEK-ALLAMAKEE-FAYETTE-CLAYTON-WINONA-HOUSTON-BUFFALO- TREMPEALEAU-LA CROSSE-VERNON-CRAWFORD-RICHLAND-GRANT- INCLUDING THE CITIES OF...DECORAH...WAUKON...OELWEIN...WINONA... LA CROSSE...VIROQUA...PRAIRIE DU CHIEN...RICHLAND CENTER... PLATTEVILLE 442 AM CST WED NOV 21 2012 ...DENSE FOG ADVISORY REMAINS IN EFFECT UNTIL NOON CST TODAY... * VISIBILITIES WILL BE REDUCED TO NEAR ZERO THROUGH MUCH OF THIS MORNING. * MOTORISTS NEED TO USE CAUTION WHILE TRAVELING THIS MORNING DUE TO THE POOR VISIBILITIES. TRAVELING THROUGH POOR LIT AREAS WILL BE EVEN MORE HAZARDOUS. ALLOW PLENTY OF EXTRA TIME TO REACH YOUR DESTINATION. PRECAUTIONARY/PREPAREDNESS ACTIONS... A DENSE FOG ADVISORY MEANS VISIBILITIES WILL FREQUENTLY BE REDUCED TO LESS THAN ONE QUARTER MILE. IF DRIVING...SLOW DOWN... USE YOUR HEADLIGHTS...AND LEAVE PLENTY OF DISTANCE AHEAD OF YOU. && $$ WIZ017-029-034-042>044-211800- /O.CON.KARX.FG.Y.0013.000000T0000Z-121121T1800Z/ TAYLOR-CLARK-JACKSON-MONROE-JUNEAU-ADAMS- INCLUDING THE CITIES OF...MEDFORD...NEILLSVILLE... BLACK RIVER FALLS...SPARTA...TOMAH...MAUSTON 442 AM CST WED NOV 21 2012 ...DENSE FOG ADVISORY REMAINS IN EFFECT UNTIL NOON CST TODAY... * VISIBILITIES WILL BE REDUCED TO NEAR ZERO THROUGH 8 AM...WITH SLOW IMPROVEMENT EXPECTED THEREAFTER. WITH TEMPERATURES AT OR BELOW FREEZING...THIS FOG MAY CAUSE SOME ICING TO TAKE PLACE ON BRIDGES AND OVERPASSES. * MOTORISTS NEED TO USE CAUTION WHILE TRAVELING THIS MORNING... DUE TO THE COMBINATION OF POOR VISIBILITIES AND POTENTIAL FOR ICING. TRAVELING THROUGH POOR LIT AREAS WILL BE EVEN MORE HAZARDOUS. ALLOW PLENTY OF EXTRA TIME TO REACH YOUR DESTINATION. PRECAUTIONARY/PREPAREDNESS ACTIONS... A DENSE FOG ADVISORY MEANS VISIBILITIES WILL FREQUENTLY BE REDUCED TO LESS THAN ONE QUARTER MILE. IF DRIVING...SLOW DOWN... USE YOUR HEADLIGHTS...AND LEAVE PLENTY OF DISTANCE AHEAD OF YOU. && $$ AJ WEATHER.GOV/LACROSSE
648 WWUS73 KARX 211235 NPWARX URGENT - WEATHER MESSAGE NATIONAL WEATHER SERVICE LA CROSSE WI 635 AM CST WED NOV 21 2012 ...USE CAUTION TRAVELING THIS MORNING...ESPECIALLY ACROSS WISCONSIN... .WIDESPREAD DENSE FOG REMAINS ACROSS MUCH OF SOUTHWEST INTO CENTRAL WISCONSIN ALONG WITH ALLAMAKEE AND CLAYTON COUNTIES IN IOWA. VISIBILITIES ARE NEAR ZERO WITHIN THE FOG. WITH TEMPERATURES AT OR BELOW FREEZING ACROSS TAYLOR...CLARK...JACKSON...MONROE...JUNEAU AND ADAMS COUNTIES...THESE AREAS MAY SEE ICING TAKE PLACE ON BRIDGES AND OVERPASSES. DUE TO THE POOR VISIBILITIES...EXERCISE CAUTION WHEN TRAVELING THIS MORNING. PLAN ON THE DENSE FOG TO ALSO IMPACT THE MORNING COMMUTE. EXPECT INCREASING SOUTHERLY WINDS TODAY TO HELP DISSIPATE THE FOG. THIS HAS ALREADY OCCURRED IN SOUTHEAST MINNESOTA...PORTIONS OF NORTHEAST IOWA AND BUFFALO AND LA CROSSE COUNTIES WISCONSIN... ALLOWING THE ADVISORY TO BE CANCELLED THERE. VISIBILITIES SHOULD BEGIN TO IMPROVE LATE THIS MORNING IN MOST LOCATIONS. IAZ010-029-MNZ088-096-WIZ032-041-211345- /O.CAN.KARX.FG.Y.0013.000000T0000Z-121121T1800Z/ WINNESHIEK-FAYETTE-WINONA-HOUSTON-BUFFALO-LA CROSSE- INCLUDING THE CITIES OF...DECORAH...OELWEIN...WINONA...LA CROSSE 635 AM CST WED NOV 21 2012 ...DENSE FOG ADVISORY IS CANCELLED... THE NATIONAL WEATHER SERVICE IN LA CROSSE HAS CANCELLED THE DENSE FOG ADVISORY. INCREASING SOUTHERLY WINDS HAVE ALLOWED MOST OF THE FOG TO DISSIPATE ACROSS WINNESHIEK...FAYETTE...WINONA...HOUSTON...BUFFALO AND LA CROSSE COUNTIES. PATCHY DENSE FOG MAY STILL BE PRESENT ALONG THE MISSISSIPPI RIVER...BUT EXPECT THIS TO DISSIPATE BY 8 AM. $$ IAZ011-030-WIZ033-053>055-061-211800- /O.CON.KARX.FG.Y.0013.000000T0000Z-121121T1800Z/ ALLAMAKEE-CLAYTON-TREMPEALEAU-VERNON-CRAWFORD-RICHLAND-GRANT- INCLUDING THE CITIES OF...WAUKON...VIROQUA...PRAIRIE DU CHIEN... RICHLAND CENTER...PLATTEVILLE 635 AM CST WED NOV 21 2012 ...DENSE FOG ADVISORY REMAINS IN EFFECT UNTIL NOON CST TODAY... * VISIBILITIES WILL BE REDUCED TO NEAR ZERO THROUGH MUCH OF THIS MORNING. * MOTORISTS NEED TO USE CAUTION WHILE TRAVELING THIS MORNING DUE TO THE POOR VISIBILITIES. ALLOW PLENTY OF EXTRA TIME TO REACH YOUR DESTINATION. PRECAUTIONARY/PREPAREDNESS ACTIONS... A DENSE FOG ADVISORY MEANS VISIBILITIES WILL FREQUENTLY BE REDUCED TO LESS THAN ONE QUARTER MILE. IF DRIVING...SLOW DOWN... USE YOUR HEADLIGHTS...AND LEAVE PLENTY OF DISTANCE AHEAD OF YOU. && $$ WIZ017-029-034-042>044-211800- /O.CON.KARX.FG.Y.0013.000000T0000Z-121121T1800Z/ TAYLOR-CLARK-JACKSON-MONROE-JUNEAU-ADAMS- INCLUDING THE CITIES OF...MEDFORD...NEILLSVILLE... BLACK RIVER FALLS...SPARTA...TOMAH...MAUSTON 635 AM CST WED NOV 21 2012 ...DENSE FOG ADVISORY REMAINS IN EFFECT UNTIL NOON CST TODAY... * VISIBILITIES WILL BE REDUCED TO NEAR ZERO THROUGH 8 AM...WITH SLOW IMPROVEMENT EXPECTED THEREAFTER. WITH TEMPERATURES AT OR BELOW FREEZING...THIS FOG MAY CAUSE SOME ICING TO TAKE PLACE ON BRIDGES AND OVERPASSES. * MOTORISTS NEED TO USE CAUTION WHILE TRAVELING THIS MORNING... DUE TO THE COMBINATION OF POOR VISIBILITIES AND POTENTIAL FOR ICING. ALLOW PLENTY OF EXTRA TIME TO REACH YOUR DESTINATION. PRECAUTIONARY/PREPAREDNESS ACTIONS... A DENSE FOG ADVISORY MEANS VISIBILITIES WILL FREQUENTLY BE REDUCED TO LESS THAN ONE QUARTER MILE. IF DRIVING...SLOW DOWN... USE YOUR HEADLIGHTS...AND LEAVE PLENTY OF DISTANCE AHEAD OF YOU. && $$ AJ WEATHER.GOV/LACROSSE
732 WWUS73 KARX 211509 NPWARX URGENT - WEATHER MESSAGE NATIONAL WEATHER SERVICE LA CROSSE WI 909 AM CST WED NOV 21 2012 ...FOGGY CONDITIONS SLOWLY IMPROVING... .DENSE FOG REMAINS IN PLACE OVER PARTS OF EASTERN IOWA INTO SOUTHERN AND CENTRAL WISCONSIN AT MID MORNING. AS SOUTHERLY WINDS INCREASE TODAY...THE FOG SHOULD CONTINUE TO BREAK UP OR LIFT. ADVISORIES WILL LIKELY BE CLEARED OVER THE NEXT HOUR OR SO FOR MOST AREAS. IF YOU HAVE TRAVEL PLANS THIS MORNING...USE CAUTION IN AREAS WHERE FOG REMAINS. WATCH FOR OTHER CARS AND BE ESPECIALLY CAUTIOUS NEAR INTERSECTIONS AND DRIVEWAYS. IF YOU MUST STOP...KEEP CLEAR OF ANY TRAVEL WAY. IAZ011-030-WIZ033-053>055-061-211800- /O.CON.KARX.FG.Y.0013.000000T0000Z-121121T1800Z/ ALLAMAKEE-CLAYTON-TREMPEALEAU-VERNON-CRAWFORD-RICHLAND-GRANT- INCLUDING THE CITIES OF...WAUKON...VIROQUA...PRAIRIE DU CHIEN... RICHLAND CENTER...PLATTEVILLE 909 AM CST WED NOV 21 2012 ...DENSE FOG ADVISORY REMAINS IN EFFECT UNTIL NOON CST TODAY... * DENSE FOG IS RESTRICTING VISIBILITIES TO A QUARTER MILE OR LESS. * MOTORISTS NEED TO USE CAUTION WHILE TRAVELING THIS MORNING DUE TO THE POOR VISIBILITIES. ALLOW EXTRA TIME TO REACH YOUR DESTINATION. PRECAUTIONARY/PREPAREDNESS ACTIONS... A DENSE FOG ADVISORY MEANS VISIBILITIES WILL FREQUENTLY BE REDUCED TO LESS THAN ONE QUARTER MILE. IF DRIVING...SLOW DOWN... USE YOUR HEADLIGHTS...AND LEAVE PLENTY OF DISTANCE AHEAD OF YOU. && $$ WIZ017-029-034-042>044-211800- /O.CON.KARX.FG.Y.0013.000000T0000Z-121121T1800Z/ TAYLOR-CLARK-JACKSON-MONROE-JUNEAU-ADAMS- INCLUDING THE CITIES OF...MEDFORD...NEILLSVILLE... BLACK RIVER FALLS...SPARTA...TOMAH...MAUSTON 909 AM CST WED NOV 21 2012 ...DENSE FOG ADVISORY REMAINS IN EFFECT UNTIL NOON CST TODAY... * PATCHY VISIBILITIES OF A QUARTER MILE OR LESS WILL GRADUALLY DISSIPATE. * MOTORISTS NEED TO USE CAUTION WHILE TRAVELING THIS MORNING. LINGERING FOG COULD REDUCE VISIBILITIES VERY QUICKLY. PRECAUTIONARY/PREPAREDNESS ACTIONS... A DENSE FOG ADVISORY MEANS VISIBILITIES WILL FREQUENTLY BE REDUCED TO LESS THAN ONE QUARTER MILE. IF DRIVING...SLOW DOWN... USE YOUR HEADLIGHTS...AND LEAVE PLENTY OF DISTANCE AHEAD OF YOU. && $$ SHEA WEATHER.GOV/LACROSSE
025 WWUS73 KARX 211557 NPWARX URGENT - WEATHER MESSAGE NATIONAL WEATHER SERVICE LA CROSSE WI 957 AM CST WED NOV 21 2012 ...FOG CONTINUES TO IMPROVE... .WIDESPREAD FOG IS BECOMING MORE LOCALIZED AND MAINLY CONCENTRATED FROM EASTERN IOWA INTO CENTRAL WISCONSIN THIS MORNING. VISIBILITIES WERE IMPROVING QUICKLY FOR MOST AREAS SO THE ADVISORIES ARE BEING DROPPED FOR THOSE REGIONS. LOW VISIBILITIES REMAIN OVER PARTS OF SOUTHWEST WISCONSIN THOUGH SO IF YOU HAVE TRAVEL PLANNED FROM THE DUBUQUE IOWA TOWARDS MADISON WISCONSIN...EXPECT FOG TO LINGER A FEW MORE HOURS. IF YOU HAVE TRAVEL PLANS THIS MORNING...USE CAUTION IN AREAS WHERE FOG REMAINS. WATCH FOR OTHER CARS AND BE ESPECIALLY CAUTIOUS NEAR INTERSECTIONS AND DRIVEWAYS. IF YOU MUST STOP... KEEP CLEAR OF ANY TRAVEL WAY. IAZ011-030-WIZ017-029-033-034-042>044-053-054-211700- /O.CAN.KARX.FG.Y.0013.000000T0000Z-121121T1800Z/ ALLAMAKEE-CLAYTON-TAYLOR-CLARK-TREMPEALEAU-JACKSON-MONROE-JUNEAU- ADAMS-VERNON-CRAWFORD- INCLUDING THE CITIES OF...WAUKON...MEDFORD...NEILLSVILLE... BLACK RIVER FALLS...SPARTA...TOMAH...MAUSTON...VIROQUA... PRAIRIE DU CHIEN 957 AM CST WED NOV 21 2012 ...DENSE FOG ADVISORY IS CANCELLED... THE NATIONAL WEATHER SERVICE IN LA CROSSE HAS CANCELLED THE DENSE FOG ADVISORY. VISIBILITIES CONTINUE TO IMPROVE AND WITH SOUTH WINDS INCREASING... NO MORE DENSE FOG IS EXPECTED. $$ WIZ055-061-211800- /O.CON.KARX.FG.Y.0013.000000T0000Z-121121T1800Z/ RICHLAND-GRANT- INCLUDING THE CITIES OF...RICHLAND CENTER...PLATTEVILLE 957 AM CST WED NOV 21 2012 ...DENSE FOG ADVISORY REMAINS IN EFFECT UNTIL NOON CST TODAY... * DENSE FOG IS RESTRICTING VISIBILITIES TO A QUARTER MILE OR LESS. * MOTORISTS NEED TO USE CAUTION WHILE TRAVELING THIS MORNING DUE TO THE POOR VISIBILITIES. ALLOW EXTRA TIME TO REACH YOUR DESTINATION. PRECAUTIONARY/PREPAREDNESS ACTIONS... A DENSE FOG ADVISORY MEANS VISIBILITIES WILL FREQUENTLY BE REDUCED TO LESS THAN ONE QUARTER MILE. IF DRIVING...SLOW DOWN... USE YOUR HEADLIGHTS...AND LEAVE PLENTY OF DISTANCE AHEAD OF YOU. && $$ SHEA WEATHER.GOV/LACROSSE
971 WWUS73 KARX 211733 NPWARX URGENT - WEATHER MESSAGE NATIONAL WEATHER SERVICE LA CROSSE WI 1133 AM CST WED NOV 21 2012 ...FOG HAS CLEARED... .THE DENSE FOG THAT BLANKETED PARTS OF THE REGION HAS LIFTED OVER MOST OF SOUTHWEST WISCONSIN...BUT CONTINUES ALONG THE ILLINOIS- WISCONSIN BORDER. THIS TOO SHOULD CONTINUE TO DISSIPATE AS SOUTHWEST WINDS INCREASE. WIZ055-061-211845- /O.CAN.KARX.FG.Y.0013.000000T0000Z-121121T1800Z/ RICHLAND-GRANT- INCLUDING THE CITIES OF...RICHLAND CENTER...PLATTEVILLE 1133 AM CST WED NOV 21 2012 ...DENSE FOG ADVISORY IS CANCELLED... THE NATIONAL WEATHER SERVICE IN LA CROSSE HAS CANCELLED THE DENSE FOG ADVISORY. VISIBILITY RESTRICTIONS DUE TO FOG ARE NO LONGER EXPECTED OR BEING OBSERVED. TRAVEL SHOULD BE MUCH IMPROVED. $$ SHEA WEATHER.GOV/LACROSSE
What forecasters said that day
The local office's own words before this dense fog advisory 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 dense fog advisory went out at Nov 20, 5:30 PM CST, 15 minutes earlier.
Area forecast discussion, Nov 20, 5:30 PM CST, 15 minutes before
AREA FORECAST DISCUSSION NATIONAL WEATHER SERVICE LA CROSSE WI 530 PM CST TUE NOV 20 2012 .SHORT TERM...TONIGHT THROUGH FRIDAY NIGHT 301 PM CST TUE NOV 20 2012 MAIN FORECAST CONCERN IS ON CLOUDS/FOG POTENTIAL TONIGHT...TEMPERATURES THROUGH THE PERIOD AND RAIN CHANCES FOR THANKSGIVING DAY. VISIBLE SATELLITE IMAGERY AT 18Z SHOWS AN AREA OF FOG ALONG THE MISSISSIPPI RIVER AND ACROSS SOUTHWEST WISCONSIN AND EASTERN IOWA. THIS AREA HAS BEEN SHRINKING OVER THE PAST SEVERAL HOURS AND EXPECT IT TO DISSIPATE BY EVENING. OTHERWISE SKIES WERE CLEAR AROUND THE AREA. 20.12Z MODELS CONTINUE TO BE IN GOOD AGREEMENT THROUGH THE PERIOD. NAM IS THE FASTEST SOLUTION IN REGARD TO THE FRONTAL MOVEMENT ON THANKSGIVING DAY AND WENT MORE WITH A MODEL CONSENSUS WITH ITS MOVEMENT ACROSS THE FORECAST AREA. IN THE NEAR TERM...PROBLEM IS ON FOG AND LOW CLOUD POTENTIAL AGAIN TONIGHT. RAP BUFKIT SOUNDINGS SHOW MOISTURE BEING TRAPPED UNDER THE STRENGTHENING INVERSION TONIGHT...BUT NAM WANTS TO SCOUR THINGS OUT WITH DRIER AIR FILTERING IN FROM THE WEST. HOWEVER...FEEL RAP MAYBE MORE ACCURATE AS GRADIENT LOOKS TO BE QUITE WEAK UNTIL LATER TONIGHT WHEN THE WINDS PICK UP ACROSS THE WEST. FEEL WIDESPREAD FOG IS AGAIN LIKELY...MAINLY IN AREAS ALONG AND EAST OF THE MISSISSIPPI RIVER. ATTENTION THEN TURNS TO BUILDING UPPER RIDGE ACROSS THE AREA WEDNESDAY. 925MB TEMPERATURES WILL WARM INTO THE LOWER TO MIDDLE TEENS CELSIUS BY AFTERNOON AND THUS EXPECT VERY WARM TEMPERATURES. MIXING POTENTIAL LOOKS TO BE BETWEEN 925MB AND 950MB AND USING THE MIX DOWN TOOL RESULTS IN A 10 DEGREE DIFFERENCE BETWEEN MIXING TO 925MB AND 950MB. THE CAVEAT WILL BE LINGERING CLOUDS AND FOG EXPECTED INTO THE MID MORNING HOURS THAT MAY PREVENT FULL WARMING. NONE THE LESS FORECAST IS BASED ON CLOUDS/FOG DISSIPATING BY MID MORNING AND COMBINED WITH A MILD START WILL STILL MAKE IT INTO THE MID 50S ACROSS THE NORTH TO THE MID 60S IN THE CENTRAL AND SOUTH. ANOTHER MILD NIGHT IS EXPECTED WEDNESDAY NIGHT WITH SOUTHERLY LOW LEVEL FLOW CONTINUING AHEAD OF AN APPROACHING COLD FRONT. THE COLD FRONT WILL REMAIN WEST OF THE AREA THROUGH THE OVERNIGHT HOURS. ANOTHER MILD DAY IS EXPECTED THANKSGIVING DAY AS THE FRONTAL PASSAGE LOOKS LIKE IT WILL OCCUR DURING THE AFTERNOON HOURS. AS MENTIONED PREVIOUSLY...NAM IS THE FASTEST SOLUTION AND USED A MODEL CONSENSUS. IN EITHER CASE...THE COLDER AIR LAGS BEHIND AND WILL NOT ARRIVE UNTIL THURSDAY NIGHT. GFS CONTINUES TO BE THE ONLY MODEL THAT GENERATES SHOWERS OVER SOUTHWEST WISCONSIN...WITH THE GEM AND ECMWF KEEPING THE RAIN JUST SOUTH OF THE AREA. WILL CONTINUE LOWER END PROBABILITIES ACROSS FAR SOUTHWEST WISCONSIN. STRONG COLD ADVECTION EXPECTED BEHIND THE FRONT THURSDAY NIGHT ALONG WITH A TIGHTENING PRESSURE GRADIENT. STRATUS LOOKS TO ADVECT SOUTHWARD AS THE NIGHT WEARS ON...ESPECIALLY ACROSS THE NORTHERN HALF OF THE FORECAST AREA. THESE CLOUDS WILL THEN CONTINUE INTO FRIDAY. PRESSURE GRADIENT RATHER TIGHT FRIDAY AND LOOKS LIKE A BLUSTERY AND COLD DAY WITH TEMPERATURES ONLY CLIMBING A FEW DEGREES FROM THE MORNING LOWS. BETTER CHANCES FOR LIGHT SHOW/RAIN WILL BE ACROSS THE NORTH AND WILL CONTINUE THE LOWER END PROBABILITIES IN THESE AREAS. HIGH PRESSURE THEN BUILDS EASTWARD FROM THE PLAINS FRIDAY NIGHT AND WITH CLEAR SKIES EXPECTED...LOWS WILL BE IN THE TEENS TO LOWER 20S. .LONG TERM... 301 PM CST TUE NOV 20 2012 MEDIUM RANGE MODELS DO SHOW SOME DIFFERENCES IN THIS TIME FRAME. 20.12Z ECMWF HAS BACKED OFF ON A NEGATIVELY TILTED TROUGH DEVELOPING EARLY NEXT WEEK AND NOW HAS MAINLY A ZONAL FLOW REGIME. GFS AND ECMWF DO DIFFER WITH SOME SUBTLE WAVES EXPECTED TO TRANSLATE THROUGH THE FLOW FROM SUNDAY THROUGH TUESDAY. SURFACE HIGH PRESSURE WILL DOMINATE THE PATTERN SATURDAY...BUT AFTER THAT CONFIDENCE IS RATHER LOW IN ANY ONE SOLUTION AND THUS HAVE WENT WITH THE MODEL CONSENSUS. TEMPERATURES LOOK TO REMAIN BELOW NORMAL THROUGH THE PERIOD...WITH HIGHS MAINLY IN THE 30S WITH LOWS IN THE TEENS AND 20S. && .AVIATION...TONIGHT AND WEDNESDAY 530 PM CST TUE NOV 20 2012 THINKING HAS NOT CHANGED MUCH SINCE NOON. A VERY PROBLEMATIC PERIOD TONIGHT/EARLY WED WITH ABUNDANT LOW LEVEL MOISTURE TRAPPED UNDER A RATHER STRONG INVERSION NEAR 925 MB. LIGHT WINDS/LIMITED MIXING THIS TIME OF YEAR HAVE RESULTED IN PERSISTENT IFR/LIFR FOG/CIGS 10-30 MILES EITHER SIDE OF THE MS RIVER...ALREADY EXPANDING EAST/WEST AS OF 23Z. RADIATIONAL COOLING/LIGHT WINDS UNDER THE INVERSION WILL ALLOW THE FOG TO CONTINUE THICKENING/SPREADING THIS EVENING... KEEPING THE KLSE AREA IN IFR/LIFR CONDITIONS TONIGHT INTO WED MORNING. SFC PRESSURE GRADIENT TIGHTENS TONIGHT AND INTO WED... ALLOWING FOR BOUNDARY LAYER MIXING UNDER THE INVERSION. THIS EXPECTED TO RESULT IN MORE MVFR VSBYS IN HZ/BR AND SCT LOW STRATUS AT HIGHER ELEVATION SITES WEST OF THE MS RIVER...LIKE KRST. GRADIENT CONTINUES TO TIGHTEN WED WITH WARMER/DRIER AIR ADVECTING/MIXING IN FROM THE SOUTHWEST. GIVEN THE TIME OF YEAR... IFR/MVFR VSBYS AND SOME IFR CIGS LIKELY TO PERSIST THRU MUCH OF WED MORNING ALONG/EAST OF THE MS RIVER...BEFORE CONDITIONS IMPROVE WITH DEEPER MIXING/ EROSION OF THE INVERSION FOR THE MID-DAY/AFTERNOON HOURS. && .CLIMATE... 200 AM CST SUN NOV 18 2012 RECORD HIGH TEMPERATURES FOR WEDNESDAY/21ST AND THURSDAY/22ND. COOP SITES ARE 7 AM-7 AM HIGHS...THUS 22ND HIGHS ARE 21.12Z TO 22.12Z. LA CROSSE AND ROCHESTER ARE THE ONLY NON-COOP SITES. FORECAST HIGH TEMPERATURES SUGGEST SOME OF THE RECORDS BELOW MAY BE TIED OR BROKEN. LOCATION WEDNESDAY/21ST THURSDAY/22ND LA CROSSE WI 72/1990 59/1963 SPARTA WI 65/1990 70/1990 MEDFORD WI 59/1913 65/1990 LANCASTER WI 66/2003 66/1898 MAUSTON WI 67/2003 66/1990 ROCHESTER MN 69/1990 65/1913 AUSTIN MN 70/1990 58/1966 WINONA DAM 5A MN 60/2003 60/2001 WABASHA MN 61/1908 59/1908 CHARLES CITY IA 71/1990 62/1966 OELWEIN IA 71/1990 62/1966 DECORAH IA 71/1990 62/1908 && .ARX WATCHES/WARNINGS/ADVISORIES... 301 PM CST TUE NOV 20 2012 WI...NONE. MN...NONE. IA...NONE. && SHORT TERM...RABERDING LONG TERM...RABERDING AVIATION.....RRS CLIMATE......JONES/DB/AJ/BOYNE
Hazardous weather outlook, Nov 20, 12:36 PM CST, 5 hours 9 minutes before
HAZARDOUS WEATHER OUTLOOK NATIONAL WEATHER SERVICE LA CROSSE WI 1236 PM CST TUE NOV 20 2012 IAZ008>011-018-019-029-030-MNZ079-086>088-094>096-WIZ017-029- 032>034-041>044-053>055-061-211200- ADAMS-ALLAMAKEE-BUFFALO-CHICKASAW-CLARK-CLAYTON-CRAWFORD-DODGE- FAYETTE-FILLMORE-FLOYD-GRANT-HOUSTON-HOWARD-JACKSON-JUNEAU-LA CROSSE-MITCHELL-MONROE-MOWER-OLMSTED-RICHLAND-TAYLOR-TREMPEALEAU- VERNON-WABASHA-WINNESHIEK-WINONA- 1236 PM CST TUE NOV 20 2012 THIS HAZARDOUS WEATHER OUTLOOK IS FOR PARTS OF SOUTHEAST MINNESOTA...NORTHEAST IOWA...AND SOUTHWEST INTO CENTRAL WISCONSIN. .DAY ONE...THIS AFTERNOON AND TONIGHT PATCHY DENSE FOG WITH VISIBILITIES OF ONE-QUARTER MILE OR LESS IS POSSIBLE AGAIN TONIGHT...MAINLY ALONG AND EAST OF THE MISSISSIPPI RIVER. .DAYS TWO THROUGH SEVEN...WEDNESDAY THROUGH MONDAY NO HAZARDOUS WEATHER IS EXPECTED AT THIS TIME. .SPOTTER INFORMATION STATEMENT... NO ACTION IS NECESSARY. .EMERGENCY MANAGEMENT COORDINATION... NO WEBINAR IS SCHEDULED. RRS
In the hours before
Special weather statement, Nov 20, 12:01 PM CST, 5 hours 44 minutes before
SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE LA CROSSE WI 1201 PM CST TUE NOV 20 2012 IAZ011-030-MNZ079-088-096-WIZ032-033-041-053>055-061-201930- ALLAMAKEE-BUFFALO-CLAYTON-CRAWFORD-GRANT-HOUSTON-LA CROSSE-RICHLAND- TREMPEALEAU-VERNON-WABASHA-WINONA- 1201 PM CST TUE NOV 20 2012 ...POCKETS OF DENSE FOG PERSISTING INTO THE EARLY AFTERNOON... VISIBILITIES CONTINUED TO SLOWLY IMPROVE IN MOST OF THE FOGGY AREAS...BUT POCKETS OF DENSE FOG PERSISTED...MAINLY OVER THE RIDGE TOPS. THE FOG WILL CONTINUE TO GRADUALLY LIFT AND DISSIPATE THROUGH THE EARLY AFTERNOON...BUT SOME LOCATIONS WILL CONTINUE TO SEE VISIBILITIES OF LESS THAN A MILE. IF TRAVELING...BE PREPARED FOR REDUCED VISIBILITIES...ESPECIALLY ON THE RIDGE TOPS. SLOW DOWN AND ALLOW EXTRA TIME TO REACH YOUR DESTINATION. RRS
The office that day
Everything else NWS La Crosse, WI issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Nov 20, 12:13 AM CST | Dense Fog Advisory | ARX | Allamakee, Chickasaw, Clayton, Fayette, Floyd, Howard and 2 more | 12 hr |
Nearby
Dense Fog Advisories in Wisconsin, 2012Dense Fog Advisories in Iowa, 2012Dense Fog Advisories in Minnesota, 2012Every dense fog advisory in 2012
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.