Alert archive / Iowa / Ice Storm Warnings in 2011
Ice Storm Warning 1, NWS Sioux Falls, SD
NWS Sioux Falls, SD issued this ice storm warning at Feb 19, 2011, 3:37 PM CST for 4 counties in South Dakota; 5 counties in Iowa. It took effect at Feb 20, 2011, 3:00 AM CST. It was in force for 12 hr. 11 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 19, 2011, 3:37 PM CST (21:37 UTC)
- In effect from
- Feb 20, 2011, 3:00 AM CST
- Expired
- Feb 20, 2011, 3:25 PM CST
- In force
- 12 hr
- Issued by
- NWS Sioux Falls, SD
Counties Clay County, IA, Dickinson County, IA, O'Brien County, IA, Osceola County, IA, Sioux County, IA, Bon Homme County, SD, Clay County, SD, Union County, SD, Yankton County, SD
The radar
The Sioux Falls radar (KFSD), 66 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 20, 8:00 AM CST | ICE STORM 0 | Tyndall, SD | ICE ACCUMULATION 1/4 INCH IN TYNDALL WITH STRAIN ON TREES AND POWER LINES. PRECIPITATION WAS MOSTLY SLEET 12 MILES NORTH OF TYNDALL. |
| Feb 20, 8:25 AM CST | ICE STORM 0 | Primghar, IA | ICE ACCUMULATION 1/4 INCH. POWER LINES HANGING LOW AND LIMBS DOWN. |
| Feb 20, 8:28 AM CST | ICE STORM 0 | Sheldon, IA | 1/4 INCH OR MORE OF ICE ACCUMULATION. TREES AND LIMBS DOWN FROM SHELDON TO WEST AND NORTH OF SHELDON. |
| Feb 20, 8:40 AM CST | ICE STORM 0 | Boyden, IA | 1/4 INCH ICE ACCUMULATION ON SIDEWALK. |
| Feb 20, 8:45 AM CST | ICE STORM | N Beresford, SD | ICE COATING HOUSE WINDOWS AND HAD TO POUND DOOR OPEN TO GET OUTSIDE. NO MEASUREMENT OF ICE THICKNESS. |
| Feb 20, 8:53 AM CST | ICE STORM 0 | Yankton, SD | ICE ACCUMULATION OF ABOUT A QUARTER INCH WITH STRAIN ON TREES AND POWER LINES IN AND NEAR YANKTON. ICING WORSE IN THE COUNTY NORTH OF YANKTON. |
| Feb 20, 8:55 AM CST | ICE STORM | Sibley, IA | CANNOT GET OUT OF HOUSE DUE TO ICE SEALING DOORS AND WINDOWS SHUT. |
| Feb 20, 12:48 PM CST | ICE STORM 0 | Superior, IA | ICE ACCUMULATION IS 1/4 INCH THICK ON A CHAIN LINK FENCE. |
| Feb 20, 1:07 PM CST | ICE STORM 0 | Terril, IA | ICE ACCUMULATION 1/4 INCH ON A FENCE. |
| Feb 20, 2:00 PM CST | ICE STORM 0 | Rock Valley, IA | .40 INCHES OF FREEZING RAIN |
| Feb 20, 2:00 PM CST | SLEET 0.8 | 4 W Spirit Lake, IA | ICE ACCUMULATION IS 3/4 INCH ON THE GROUND, AND THE TOTAL PRECIPITATION FOR THE DAY SO FAR IS 0.82 INCH. SOME OF IT WAS LIQUID RAIN THIS MORNING. |
Local storm reports filed while the alert was in force, from inside its polygon or its counties.
The nearest sounding before it
Omaha, NE (KOAX), launched 12:00Z, 9.6 hours before the alert went out and 196 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
- 1527 m above ground
- 0-6 km bulk shear
- 84 kt
- 0-1 km storm-relative helicity
- 358 m²/s²
- 0-3 km storm-relative helicity
- 416 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted, in the capitals the NWS used until 2016.
702 WWUS43 KFSD 192137 WSWFSD URGENT - WINTER WEATHER MESSAGE NATIONAL WEATHER SERVICE SIOUX FALLS SD 337 PM CST SAT FEB 19 2011 .A STRONG AREA OF LOW PRESSURE WILL MOVE ACROSS THE CENTRAL PLAINS SATURDAY NIGHT AND SUNDAY...EXITING THROUGH THE SOUTHERN GREAT LAKES EARLY MONDAY MORNING. AS THE LOW MOVES EASTWARD... PRECIPITATION WILL BECOME WIDESPREAD ACROSS THE REGION TONIGHT. THE AIR SHOULD BE COLD ENOUGH TO PRODUCE ALL SNOW GENERALLY ALONG AND NORTH OF A LINE FROM WINDOM MINNESOTA...TO DELL RAPIDS SOUTH DAKOTA...AND INTO NORTHERN GREGORY COUNTY SOUTH DAKOTA. THIS AREA WILL ALSO SEE INCREASING NORTH WINDS...WITH FREQUENT GUSTS TO 40 MPH LIKELY ON SUNDAY...CAUSING BLIZZARD CONDITIONS. FARTHER TO THE SOUTH...PRECIPITATION TYPE WILL TRANSITION TO MAINLY FREEZING RAIN. THE TRANSITION ZONE FROM AROUND PARKSTON TO SIOUX FALLS SOUTH DAKOTA...TO WINDOM MINNESOTA WILL SEE ONE TO TWO TENTHS OF AN INCH OF ICE ACCUMULATION LATE TONIGHT INTO SUNDAY MORNING... FOLLOWED BY 5 TO 10 INCHES OF SNOW ACCUMULATION. A WINTER STORM WARNING IS IN EFFECT FOR THE COMBINATION OF ICE AND SNOW. MAINLY FREEZING RAIN IS EXPECTED INTO SUNDAY FROM YANKTON TO CANTON SOUTH DAKOTA...EAST TOWARD SPENCER AND SPIRIT LAKE IOWA. THIS AREA HAS THE GREATEST THREAT OF SIGNIFICANT ICE ACCUMULATIONS...RANGING FROM A QUARTER TO A HALF INCH...AND AN ICE STORM WARNING HAS BEEN POSTED. ALL PRECIPITATION WILL CHANGE TO SNOW FROM WEST TO EAST THROUGH THE AFTERNOON AND EVENING. TOTAL SNOWFALL ACCUMULATIONS WILL RANGE FROM 2 TO 6 INCHES IN THE ICE STORM WARNING AREA...TO 8 TO 14 INCHES FROM SOUTH CENTRAL SOUTH DAKOTA INTO SOUTHWEST MINNESOTA WHERE A BLIZZARD WARNING IS IN EFFECT. THE TRACK OF THE LOW IS CRITICAL FOR THESE SNOW AND ICE ACCUMULATIONS...AND ANY SMALL DEVIATION OF THE LOW TRACK WILL SIGNIFICANTLY ALTER SNOW AND ICE ACCUMULATIONS. THEREFORE...A WINTER STORM WATCH REMAINS IN EFFECT FOR FAR SOUTHEASTERN SOUTH DAKOTA AND EXTREME NORTHWEST IOWA. SDZ059-060-200545- /O.CAN.KFSD.WS.W.0002.110220T0900Z-110221T1200Z/ /O.NEW.KFSD.BZ.W.0005.110220T0900Z-110221T1200Z/ DAVISON-HANSON- INCLUDING THE CITIES OF...MITCHELL...ALEXANDRIA...EMERY 337 PM CST SAT FEB 19 2011 ...BLIZZARD WARNING IN EFFECT FROM 3 AM SUNDAY TO 6 AM CST MONDAY... ...WINTER STORM WARNING IS CANCELLED... THE NATIONAL WEATHER SERVICE IN SIOUX FALLS HAS ISSUED A BLIZZARD WARNING...WHICH IS IN EFFECT FROM 3 AM SUNDAY TO 6 AM CST MONDAY. THE WINTER STORM WARNING HAS BEEN CANCELLED. * TIMING...SNOW WILL DEVELOP QUICKLY AFTER MIDNIGHT TONIGHT... POSSIBLY MIXED WITH A LITTLE FREEZING RAIN OR SLEET AT FIRST. SNOW WILL THEN CONTINUE INTO SUNDAY NIGHT...BECOMING HEAVY AT TIMES ON SUNDAY. * ACCUMULATIONS...8 TO 14 INCHES OF SNOW IS EXPECTED LATE TONIGHT THROUGH SUNDAY NIGHT. * WIND AND VISIBILITY...WINDS WILL INCREASE TO 20 TO 35 MPH ON SUNDAY INTO SUNDAY NIGHT...WITH GUSTS AROUND 40 MPH. THESE STRONG WINDS WILL PRODUCE WIDESPREAD BLOWING SNOW WITH WHITEOUT CONDITIONS... ESPECIALLY IN OPEN AREAS. PRECAUTIONARY/PREPAREDNESS ACTIONS... A BLIZZARD WARNING MEANS SEVERE WINTER WEATHER CONDITIONS ARE EXPECTED OR OCCURRING. FALLING AND BLOWING SNOW WITH STRONG WINDS AND POOR VISIBILITIES ARE LIKELY. THIS WILL LEAD TO WHITEOUT CONDITIONS...MAKING TRAVEL EXTREMELY DANGEROUS. DO NOT TRAVEL. IF YOU MUST...HAVE A WINTER SURVIVAL KIT WITH YOU. IF YOU GET STRANDED...STAY WITH YOUR VEHICLE. && $$ MNZ071-072-097-SDZ038>040-052>058-200545- /O.CAN.KFSD.WS.W.0002.110220T1200Z-110221T1200Z/ /O.NEW.KFSD.BZ.W.0005.110220T0900Z-110221T1200Z/ LINCOLN-LYON-PIPESTONE-BEADLE-KINGSBURY-BROOKINGS-JERAULD-SANBORN- MINER-LAKE-MOODY-BRULE-AURORA- INCLUDING THE CITIES OF...TYLER...HENDRICKS...LAKE BENTON... IVANHOE...MARSHALL...PIPESTONE...HURON...DE SMET...ARLINGTON... LAKE PRESTON...BROOKINGS...WESSINGTON SPRINGS...ALPENA... WOONSOCKET...HOWARD...MADISON...FLANDREAU...CHAMBERLAIN... KIMBALL...PLANKINTON...WHITE LAKE...STICKNEY 337 PM CST SAT FEB 19 2011 ...BLIZZARD WARNING IN EFFECT FROM 3 AM SUNDAY TO 6 AM CST MONDAY... ...WINTER STORM WARNING IS CANCELLED... THE NATIONAL WEATHER SERVICE IN SIOUX FALLS HAS ISSUED A BLIZZARD WARNING...WHICH IS IN EFFECT FROM 3 AM SUNDAY TO 6 AM CST MONDAY. THE WINTER STORM WARNING HAS BEEN CANCELLED. * TIMING...SNOW WILL SPREAD NORTH ACROSS THE AREA AFTER MIDNIGHT TONIGHT. SNOW WILL THEN CONTINUE INTO SUNDAY NIGHT...BECOMING HEAVY AT TIMES ON SUNDAY. * ACCUMULATIONS...8 TO 14 INCHES OF SNOW IS EXPECTED LATE TONIGHT THROUGH SUNDAY NIGHT. * WIND AND VISIBILITY...WINDS WILL INCREASE TO 20 TO 35 MPH ON SUNDAY INTO SUNDAY NIGHT...WITH GUSTS AROUND 40 MPH. THESE STRONG WINDS WILL PRODUCE WIDESPREAD BLOWING SNOW WITH WHITEOUT CONDITIONS... ESPECIALLY IN OPEN AREAS. * WIND CHILL VALUES...WIND CHILL VALUES OF 10 BELOW TO 18 BELOW WILL BE LIKELY SUNDAY NIGHT ALONG AND WEST OF THE JAMES RIVER. PRECAUTIONARY/PREPAREDNESS ACTIONS... A BLIZZARD WARNING MEANS SEVERE WINTER WEATHER CONDITIONS ARE EXPECTED OR OCCURRING. FALLING AND BLOWING SNOW WITH STRONG WINDS AND POOR VISIBILITIES ARE LIKELY. THIS WILL LEAD TO WHITEOUT CONDITIONS...MAKING TRAVEL EXTREMELY DANGEROUS. DO NOT TRAVEL. IF YOU MUST...HAVE A WINTER SURVIVAL KIT WITH YOU. IF YOU GET STRANDED...STAY WITH YOUR VEHICLE. && $$ SDZ050-063-064-200545- /O.UPG.KFSD.WS.A.0001.110220T0600Z-110221T0600Z/ /O.NEW.KFSD.BZ.W.0005.110220T0900Z-110221T1200Z/ GREGORY-CHARLES MIX-DOUGLAS- INCLUDING THE CITIES OF...GREGORY...BURKE...WAGNER...PLATTE... LAKE ANDES...MARTY...ARMOUR...CORSICA...DELMONT 337 PM CST SAT FEB 19 2011 ...BLIZZARD WARNING IN EFFECT FROM 3 AM SUNDAY TO 6 AM CST MONDAY... THE NATIONAL WEATHER SERVICE IN SIOUX FALLS HAS ISSUED A BLIZZARD WARNING...WHICH IS IN EFFECT FROM 3 AM SUNDAY TO 6 AM CST MONDAY. THE WINTER STORM WATCH IS NO LONGER IN EFFECT. * TIMING...SNOW WILL DEVELOP QUICKLY AFTER MIDNIGHT TONIGHT... POSSIBLY MIXED WITH A LITTLE FREEZING RAIN OR SLEET AT FIRST. SNOW WILL THEN CONTINUE INTO SUNDAY NIGHT...BECOMING HEAVY AT TIMES ON SUNDAY. * ACCUMULATIONS...8 TO 14 INCHES OF SNOW IS EXPECTED LATE TONIGHT THROUGH SUNDAY NIGHT. * WIND AND VISIBILITY...WINDS WILL INCREASE TO 20 TO 35 MPH ON SUNDAY INTO SUNDAY NIGHT...WITH GUSTS AROUND 40 MPH. THESE STRONG WINDS WILL PRODUCE WIDESPREAD BLOWING SNOW WITH WHITEOUT CONDITIONS... ESPECIALLY IN OPEN AREAS. * WIND CHILL VALUES...WIND CHILL VALUES OF 10 BELOW TO 18 BELOW WILL BE LIKELY SUNDAY NIGHT ALONG AND WEST OF THE JAMES RIVER. PRECAUTIONARY/PREPAREDNESS ACTIONS... A BLIZZARD WARNING MEANS SEVERE WINTER WEATHER CONDITIONS ARE EXPECTED OR OCCURRING. FALLING AND BLOWING SNOW WITH STRONG WINDS AND POOR VISIBILITIES ARE LIKELY. THIS WILL LEAD TO WHITEOUT CONDITIONS...MAKING TRAVEL EXTREMELY DANGEROUS. DO NOT TRAVEL. IF YOU MUST...HAVE A WINTER SURVIVAL KIT WITH YOU. IF YOU GET STRANDED...STAY WITH YOUR VEHICLE. && $$ IAZ002-003-012>014-SDZ068>071-200545- /O.UPG.KFSD.WS.A.0001.110220T0600Z-110221T0600Z/ /O.NEW.KFSD.IS.W.0001.110220T0900Z-110221T0600Z/ OSCEOLA-DICKINSON-SIOUX-OBRIEN-CLAY-BON HOMME-YANKTON-UNION- INCLUDING THE CITIES OF...SIBLEY...SPIRIT LAKE...MILFORD... ARNOLDS PARK...ORANGE CITY...SIOUX CENTER...SHELDON...HARTLEY... SANBORN...SPENCER...TYNDALL...SCOTLAND...SPRINGFIELD...AVON... TABOR...YANKTON...VERMILLION...NORTH SIOUX CITY...BERESFORD... ELK POINT...ALCESTER...JEFFERSON 337 PM CST SAT FEB 19 2011 ...ICE STORM WARNING IN EFFECT FROM 3 AM SUNDAY TO MIDNIGHT CST SUNDAY NIGHT... THE NATIONAL WEATHER SERVICE IN SIOUX FALLS HAS ISSUED AN ICE STORM WARNING...WHICH IS IN EFFECT FROM 3 AM SUNDAY TO MIDNIGHT CST SUNDAY NIGHT. THE WINTER STORM WATCH IS NO LONGER IN EFFECT. * TIMING...RAIN OR FREEZING RAIN WILL SPREAD INTO THE AREA AROUND MIDNIGHT TONIGHT...WITH A PROLONGED PERIOD OF FREEZING RAIN EXPECTED LATE TONIGHT THROUGH MUCH OF THE DAY SUNDAY. FREEZING RAIN WILL GRADUALLY CHANGE TO SNOW FROM WEST TO EAST...WITH SNOW EXPECTED IN THE YANKTON AREA IN THE LATE MORNING...BUT NOT REACHING THE SPENCER AND SPIRIT LAKE IOWA AREAS UNTIL TOWARD EVENING. * ACCUMULATIONS...SIGNIFICANT ICE ACCUMULATIONS OF A QUARTER TO A HALF INCH ARE LIKELY LATE TONIGHT THROUGH SUNDAY. THIS WILL BE TOPPED BY 2 TO 5 INCHES OF SNOW LATER SUNDAY AND SUNDAY NIGHT. * WIND AND VISIBILITY...WINDS WILL INCREASE TO 15 TO 30 MPH ON SUNDAY AND SUNDAY NIGHT...WITH OCCASIONAL GUSTS OF 35 TO 40 MPH POSSIBLE ALONG THE MISSOURI RIVER VALLEY AREA FROM TYNDALL TO YANKTON AND VERMILLION. THESE WINDS WILL CAUSE SIGNIFICANT STRESS ON ICE-LADEN POWER LINES. PRECAUTIONARY/PREPAREDNESS ACTIONS... AN ICE STORM WARNING MEANS SEVERE WINTER WEATHER CONDITIONS ARE EXPECTED OR OCCURRING. SIGNIFICANT AMOUNTS OF ICE ACCUMULATIONS WILL MAKE TRAVEL DANGEROUS OR IMPOSSIBLE. TRAVEL IS STRONGLY DISCOURAGED. COMMERCE WILL LIKELY BE SEVERELY IMPACTED. IF YOU MUST TRAVEL...KEEP AN EXTRA FLASHLIGHT...FOOD...AND WATER IN YOUR VEHICLE IN CASE OF AN EMERGENCY. ICE ACCUMULATIONS AND WINDS WILL LIKELY LEAD TO SNAPPED POWER LINES AND FALLING TREE BRANCHES THAT ADD TO THE DANGER. && $$ MNZ080-081-200545- /O.EXT.KFSD.WS.W.0002.110220T0900Z-110221T1200Z/ MURRAY-COTTONWOOD- INCLUDING THE CITIES OF...SLAYTON...FULDA...WINDOM... MOUNTAIN LAKE 337 PM CST SAT FEB 19 2011 ...WINTER STORM WARNING NOW IN EFFECT FROM 3 AM SUNDAY TO 6 AM CST MONDAY... THE WINTER STORM WARNING IS NOW IN EFFECT FROM 3 AM SUNDAY TO 6 AM CST MONDAY. * TIMING...A MIX OF SLEET...SNOW AND FREEZING RAIN WILL SPREAD INTO THE AREA LATE TONIGHT...WITH PRECIPITATION CHANGING TO ALL SNOW BY MID MORNING SUNDAY. PERIODS OF HEAVY SNOW WILL THEN CONTINUE SUNDAY AND SUNDAY NIGHT...WITH THE SNOW DIMINISHING MONDAY MORNING. * ACCUMULATIONS...SNOW ACCUMULATIONS OF 8 TO 14 INCHES ARE EXPECTED. ICE ACCUMULATIONS UP TO A TENTH OF AN INCH ARE ALSO POSSIBLE... ESPECIALLY NEAR THE HIGHWAY 60 CORRIDOR. * WIND AND VISIBILITY...NORTH WINDS WILL INCREASE TO 20 TO 30 MPH ON SUNDAY AND SUNDAY NIGHT. ALONG WITH THE HEAVY SNOW... BLOWING SNOW WILL REDUCE VISIBILITIES TO LESS THAN A HALF MILE...ESPECIALLY IN OPEN AREAS. 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. && $$ IAZ001-MNZ089-090-098-SDZ061-062-065>067-200545- /O.CON.KFSD.WS.W.0002.110220T0900Z-110221T1200Z/ LYON-NOBLES-JACKSON-ROCK-MCCOOK-MINNEHAHA-HUTCHINSON-TURNER- LINCOLN- INCLUDING THE CITIES OF...ROCK RAPIDS...GEORGE...INWOOD... LARCHWOOD...WORTHINGTON...JACKSON...LAKEFIELD...LUVERNE...SALEM... CANISTOTA...BRIDGEWATER...MONTROSE...SIOUX FALLS...PARKSTON... FREEMAN...MENNO...TRIPP...PARKER...CENTERVILLE...MARION... VIBORG...HURLEY...CHANCELLOR...CANTON...LENNOX...TEA...HARRISBURG 337 PM CST SAT FEB 19 2011 ...WINTER STORM WARNING REMAINS IN EFFECT FROM 3 AM SUNDAY TO 6 AM CST MONDAY... A WINTER STORM WARNING REMAINS IN EFFECT FROM 3 AM SUNDAY TO 6 AM CST MONDAY. * TIMING...A MIX OF FREEZING RAIN...SLEET AND SNOW WILL BECOME WIDESPREAD BETWEEN MIDNIGHT AND 3 AM TONIGHT...WITH FREEZING RAIN AND SNOW CONTINUING INTO SUNDAY MORNING. PRECIPITATION WILL CHANGE TO SNOW FROM WEST TO EAST THROUGH THE DAY SUNDAY...WITH SNOW CONTINUING SUNDAY NIGHT. THE SNOW WILL BE HEAVY AT TIMES ON SUNDAY. * ACCUMULATIONS...A TIGHT GRADIENT OF BOTH SNOW AND ICE ACCUMULATIONS ARE EXPECTED ACROSS THE AREA. SNOWFALL ACCUMULATIONS WILL VARY FROM 2 TO 4 INCHES SOUTH OF A LINE FROM VIBORG AND CANTON SOUTH DAKOTA TO JACKSON MINNESOTA...UPWARDS TO 10 INCHES OR MORE NORTH AND WEST OF SIOUX FALLS. WHERE THE SNOWFALL IS LESS...THERE WILL BE AN INCREASED THREAT FOR SIGNIFICANT ICING...WITH ICE ACCUMULATIONS OF A QUARTER TO HALF INCH POSSIBLE NEAR AND SOUTH OF THAT VIBORG TO CANTON TO JACKSON MINNESOTA LINE. * WIND AND VISIBILITY...WINDS WILL INCREASE TO 20 TO 35 MPH SUNDAY INTO SUNDAY NIGHT. THESE STRONG WINDS WILL PRODUCE BLOWING SNOW...REDUCING VISIBILITY BELOW A HALF MILE... ESPECIALLY IN OPEN AREAS. IN ADDITION...SOME POWER LINE STRESS MAY OCCUR IN AREAS WHERE SIGNIFICANT ICE ACCUMULATIONS ARE SEEN. PRECAUTIONARY/PREPAREDNESS ACTIONS... A WINTER STORM WARNING MEANS SIGNIFICANT AMOUNTS OF SNOW... SLEET...AND ICE ARE EXPECTED OR OCCURRING. STRONG WINDS ARE ALSO POSSIBLE. THIS WILL MAKE TRAVEL VERY HAZARDOUS OR IMPOSSIBLE. && $$
4 follow-up statements
731 WWUS43 KFSD 200319 WSWFSD URGENT - WINTER WEATHER MESSAGE NATIONAL WEATHER SERVICE SIOUX FALLS SD 919 PM CST SAT FEB 19 2011 .A STRONG AREA OF LOW PRESSURE WILL MOVE ACROSS THE CENTRAL PLAINS TONIGHT AND SUNDAY...EXITING THROUGH THE SOUTHERN GREAT LAKES EARLY MONDAY MORNING. AS THE LOW MOVES EASTWARD...PRECIPITATION WILL BECOME WIDESPREAD ACROSS THE REGION TONIGHT. THE AIR SHOULD BE COLD ENOUGH TO PRODUCE ALL SNOW GENERALLY ALONG AND NORTH OF A LINE FROM TRACY AND PIPESTONE MINNESOTA...TO SALEM SOUTH DAKOTA...AND INTO GREGORY COUNTY SOUTH DAKOTA. THIS AREA WILL ALSO SEE INCREASING NORTH WINDS...WITH FREQUENT GUSTS TO 40 MPH LIKELY ON SUNDAY... CAUSING BLIZZARD CONDITIONS. FARTHER TO THE SOUTH...PRECIPITATION TYPE WILL TRANSITION TO MAINLY FREEZING RAIN. THE TRANSITION ZONE FROM AROUND PARKSTON TO SIOUX FALLS SOUTH DAKOTA...TO WINDOM MINNESOTA WILL SEE A TENTH TO A QUARTER INCH OF ICE ACCUMULATION LATE TONIGHT THROUGH MIDDAY SUNDAY...FOLLOWED BY 5 TO 10 INCHES OF SNOW ACCUMULATION. A WINTER STORM WARNING IS IN EFFECT FOR THE COMBINATION OF ICE AND SNOW. MAINLY FREEZING RAIN IS EXPECTED INTO SUNDAY FROM YANKTON TO CANTON SOUTH DAKOTA...EAST TOWARD SPENCER AND SPIRIT LAKE IOWA. THIS AREA HAS THE GREATEST THREAT OF SIGNIFICANT ICE ACCUMULATIONS...RANGING FROM A QUARTER TO A HALF INCH...AND AN ICE STORM WARNING HAS BEEN POSTED. ALL PRECIPITATION WILL CHANGE TO SNOW FROM WEST TO EAST THROUGH THE AFTERNOON AND EVENING. TOTAL SNOWFALL ACCUMULATIONS WILL RANGE FROM 2 TO 6 INCHES IN THE ICE STORM WARNING AREA...TO 8 TO 14 INCHES FROM SOUTH CENTRAL SOUTH DAKOTA INTO SOUTHWEST MINNESOTA WHERE A BLIZZARD WARNING IS IN EFFECT. THE TRACK OF THE LOW IS CRITICAL FOR THESE SNOW AND ICE ACCUMULATIONS...AND ANY SMALL DEVIATION OF THE LOW TRACK WILL SIGNIFICANTLY ALTER SNOW AND ICE ACCUMULATIONS. THEREFORE...A WINTER STORM WATCH REMAINS IN EFFECT FOR FAR SOUTHEASTERN SOUTH DAKOTA AND EXTREME NORTHWEST IOWA. MNZ071-072-097-SDZ038>040-050-052>060-063-064-201130- /O.CON.KFSD.BZ.W.0005.110220T0900Z-110221T1200Z/ LINCOLN-LYON-PIPESTONE-BEADLE-KINGSBURY-BROOKINGS-GREGORY-JERAULD- SANBORN-MINER-LAKE-MOODY-BRULE-AURORA-DAVISON-HANSON-CHARLES MIX- DOUGLAS- INCLUDING THE CITIES OF...TYLER...HENDRICKS...LAKE BENTON... IVANHOE...MARSHALL...PIPESTONE...HURON...DE SMET...ARLINGTON... LAKE PRESTON...BROOKINGS...GREGORY...BURKE...WESSINGTON SPRINGS... ALPENA...WOONSOCKET...HOWARD...MADISON...FLANDREAU... CHAMBERLAIN...KIMBALL...PLANKINTON...WHITE LAKE...STICKNEY... MITCHELL...ALEXANDRIA...EMERY...WAGNER...PLATTE...LAKE ANDES... MARTY...ARMOUR...CORSICA...DELMONT 919 PM CST SAT FEB 19 2011 ...BLIZZARD WARNING REMAINS IN EFFECT FROM 3 AM SUNDAY TO 6 AM CST MONDAY... A BLIZZARD WARNING REMAINS IN EFFECT FROM 3 AM SUNDAY TO 6 AM CST MONDAY. * TIMING...SNOW WILL SPREAD NORTH ACROSS THE AREA AFTER MIDNIGHT TONIGHT. SNOW WILL THEN CONTINUE INTO SUNDAY NIGHT...BECOMING HEAVY AT TIMES ON SUNDAY. * ACCUMULATIONS...8 TO 14 INCHES OF SNOW IS EXPECTED LATE TONIGHT THROUGH SUNDAY NIGHT. * WIND AND VISIBILITY...WINDS WILL INCREASE TO 20 TO 35 MPH ON SUNDAY INTO SUNDAY NIGHT...WITH GUSTS AROUND 40 MPH. THESE STRONG WINDS WILL PRODUCE WIDESPREAD BLOWING SNOW WITH WHITEOUT CONDITIONS... ESPECIALLY IN OPEN AREAS. * WIND CHILL VALUES...WIND CHILL VALUES OF 10 BELOW TO 18 BELOW WILL BE LIKELY SUNDAY NIGHT ALONG AND WEST OF THE JAMES RIVER. PRECAUTIONARY/PREPAREDNESS ACTIONS... A BLIZZARD WARNING MEANS SEVERE WINTER WEATHER CONDITIONS ARE EXPECTED OR OCCURRING. FALLING AND BLOWING SNOW WITH STRONG WINDS AND POOR VISIBILITIES ARE LIKELY. THIS WILL LEAD TO WHITEOUT CONDITIONS...MAKING TRAVEL EXTREMELY DANGEROUS. DO NOT TRAVEL. IF YOU MUST...HAVE A WINTER SURVIVAL KIT WITH YOU. IF YOU GET STRANDED...STAY WITH YOUR VEHICLE. && $$ IAZ002-003-012>014-SDZ068>071-201130- /O.CON.KFSD.IS.W.0001.110220T0900Z-110221T0600Z/ OSCEOLA-DICKINSON-SIOUX-OBRIEN-CLAY-BON HOMME-YANKTON-UNION- INCLUDING THE CITIES OF...SIBLEY...SPIRIT LAKE...MILFORD... ARNOLDS PARK...ORANGE CITY...SIOUX CENTER...SHELDON...HARTLEY... SANBORN...SPENCER...TYNDALL...SCOTLAND...SPRINGFIELD...AVON... TABOR...YANKTON...VERMILLION...NORTH SIOUX CITY...BERESFORD... ELK POINT...ALCESTER...JEFFERSON 919 PM CST SAT FEB 19 2011 ...ICE STORM WARNING REMAINS IN EFFECT FROM 3 AM SUNDAY TO MIDNIGHT CST SUNDAY NIGHT... AN ICE STORM WARNING REMAINS IN EFFECT FROM 3 AM SUNDAY TO MIDNIGHT CST SUNDAY NIGHT. * TIMING...RAIN OR FREEZING RAIN WILL SPREAD INTO THE AREA AROUND MIDNIGHT TONIGHT...WITH A PROLONGED PERIOD OF FREEZING RAIN EXPECTED LATE TONIGHT THROUGH MUCH OF THE DAY SUNDAY. FREEZING RAIN WILL GRADUALLY CHANGE TO SNOW FROM WEST TO EAST...WITH SNOW EXPECTED IN THE YANKTON AREA BY MIDDAY SUNDAY...BUT NOT REACHING THE SPENCER AND SPIRIT LAKE IOWA AREAS UNTIL TOWARD EVENING. * ACCUMULATIONS...SIGNIFICANT ICE ACCUMULATIONS OF A QUARTER TO A HALF INCH ARE LIKELY LATE TONIGHT THROUGH SUNDAY. THIS WILL BE TOPPED BY 2 TO 5 INCHES OF SNOW LATER SUNDAY AND SUNDAY NIGHT. * WIND AND VISIBILITY...WINDS WILL INCREASE TO 15 TO 30 MPH ON SUNDAY AND SUNDAY NIGHT...WITH OCCASIONAL GUSTS OF 35 TO 40 MPH POSSIBLE ALONG THE MISSOURI RIVER VALLEY AREA FROM TYNDALL TO YANKTON AND VERMILLION. THESE WINDS WILL CAUSE SIGNIFICANT STRESS ON ICE-LADEN POWER LINES. PRECAUTIONARY/PREPAREDNESS ACTIONS... AN ICE STORM WARNING MEANS SEVERE WINTER WEATHER CONDITIONS ARE EXPECTED OR OCCURRING. SIGNIFICANT AMOUNTS OF ICE ACCUMULATIONS WILL MAKE TRAVEL DANGEROUS OR IMPOSSIBLE. TRAVEL IS STRONGLY DISCOURAGED. COMMERCE WILL LIKELY BE SEVERELY IMPACTED. IF YOU MUST TRAVEL...KEEP AN EXTRA FLASHLIGHT...FOOD...AND WATER IN YOUR VEHICLE IN CASE OF AN EMERGENCY. ICE ACCUMULATIONS AND WINDS WILL LIKELY LEAD TO SNAPPED POWER LINES AND FALLING TREE BRANCHES THAT ADD TO THE DANGER. && $$ IAZ001-MNZ080-081-089-090-098-SDZ061-062-065>067-201130- /O.CON.KFSD.WS.W.0002.110220T0900Z-110221T1200Z/ LYON-MURRAY-COTTONWOOD-NOBLES-JACKSON-ROCK-MCCOOK-MINNEHAHA- HUTCHINSON-TURNER-LINCOLN- INCLUDING THE CITIES OF...ROCK RAPIDS...GEORGE...INWOOD... LARCHWOOD...SLAYTON...FULDA...WINDOM...MOUNTAIN LAKE... WORTHINGTON...JACKSON...LAKEFIELD...LUVERNE...SALEM...CANISTOTA... BRIDGEWATER...MONTROSE...SIOUX FALLS...PARKSTON...FREEMAN... MENNO...TRIPP...PARKER...CENTERVILLE...MARION...VIBORG...HURLEY... CHANCELLOR...CANTON...LENNOX...TEA...HARRISBURG 919 PM CST SAT FEB 19 2011 ...WINTER STORM WARNING REMAINS IN EFFECT FROM 3 AM SUNDAY TO 6 AM CST MONDAY... A WINTER STORM WARNING REMAINS IN EFFECT FROM 3 AM SUNDAY TO 6 AM CST MONDAY. * TIMING...A MIX OF FREEZING RAIN...SLEET AND SNOW WILL BECOME WIDESPREAD BETWEEN MIDNIGHT AND 3 AM TONIGHT...WITH FREEZING RAIN AND SNOW CONTINUING INTO SUNDAY MORNING. PRECIPITATION WILL CHANGE TO SNOW FROM WEST TO EAST THROUGH THE DAY SUNDAY... WITH SNOW CONTINUING SUNDAY NIGHT. THE SNOW WILL BE HEAVY AT TIMES ON SUNDAY. * ACCUMULATIONS...A TIGHT GRADIENT OF BOTH SNOW AND ICE ACCUMULATIONS ARE EXPECTED ACROSS THE AREA. SNOWFALL ACCUMULATIONS WILL VARY FROM 2 TO 4 INCHES SOUTH OF A LINE FROM VIBORG AND CANTON SOUTH DAKOTA TO JACKSON MINNESOTA... TO 8 TO 10 INCHES OR MORE NORTH OF A LINE FROM SIOUX FALLS TO WINDOM. AREAS WITH LESSER SNOWFALL WILL SEE AN INCREASED THREAT FOR SIGNIFICANT ICING...WITH ICE ACCUMULATIONS OF A QUARTER TO HALF INCH POSSIBLE NEAR AND SOUTH OF THAT VIBORG TO CANTON TO JACKSON MINNESOTA LINE. * WIND AND VISIBILITY...WINDS WILL INCREASE TO 20 TO 35 MPH SUNDAY INTO SUNDAY NIGHT. THESE STRONG WINDS WILL PRODUCE BLOWING SNOW... REDUCING VISIBILITY BELOW A HALF MILE...ESPECIALLY IN OPEN AREAS. IN ADDITION...POWER LINE STRESS MAY OCCUR IN AREAS WHERE SIGNIFICANT ICE ACCUMULATIONS ARE SEEN. PRECAUTIONARY/PREPAREDNESS ACTIONS... A WINTER STORM WARNING MEANS SIGNIFICANT AMOUNTS OF SNOW... SLEET...AND ICE ARE EXPECTED OR OCCURRING. STRONG WINDS ARE ALSO POSSIBLE. THIS WILL MAKE TRAVEL VERY HAZARDOUS OR IMPOSSIBLE. && $$ JH
036 WWUS43 KFSD 201000 WSWFSD URGENT - WINTER WEATHER MESSAGE NATIONAL WEATHER SERVICE SIOUX FALLS SD 400 AM CST SUN FEB 20 2011 .A STRONG AREA OF LOW PRESSURE WILL MOVE ACROSS THE CENTRAL PLAINS TODAY...EXITING THROUGH THE SOUTHERN GREAT LAKES EARLY MONDAY MORNING. THE AIR SHOULD BE COLD ENOUGH TO PRODUCE ALL SNOW GENERALLY ALONG AND NORTH OF A LINE FROM TRACY AND PIPESTONE MINNESOTA...TO MITCHELL SOUTH DAKOTA...AND INTO GREGORY COUNTY SOUTH DAKOTA. THIS AREA WILL ALSO SEE INCREASING NORTH WINDS...WITH FREQUENT GUSTS TO 40 MPH LIKELY... CAUSING BLIZZARD CONDITIONS. FARTHER TO THE SOUTH...PRECIPITATION TYPE WILL TRANSITION TO MAINLY FREEZING RAIN AND SLEET. THE TRANSITION ZONE FROM AROUND PARKSTON TO SIOUX FALLS SOUTH DAKOTA...TO WINDOM MINNESOTA WILL SEE A TENTH TO A QUARTER INCH OF ICE ACCUMULATION LATE TONIGHT THROUGH MIDDAY SUNDAY...FOLLOWED BY 3 TO 7 INCHES OF SNOW ACCUMULATION. A WINTER STORM WARNING IS IN EFFECT FOR THE COMBINATION OF ICE AND SNOW. MAINLY FREEZING RAIN IS EXPECTED INTO SUNDAY FROM YANKTON TO CANTON SOUTH DAKOTA...EAST TOWARD SPENCER AND SPIRIT LAKE IOWA. THIS AREA HAS THE GREATEST THREAT OF SIGNIFICANT ICE ACCUMULATIONS...RANGING FROM A QUARTER TO A HALF INCH...AND AN ICE STORM WARNING HAS BEEN POSTED. ALL PRECIPITATION WILL CHANGE TO SNOW FROM WEST TO EAST SUNDAY AFTERNOON AND EVENING. TOTAL SNOWFALL ACCUMULATIONS WILL RANGE FROM 1 TO 4 INCHES IN THE ICE STORM WARNING AREA...TO 7 TO 13 INCHES FROM SOUTH CENTRAL SOUTH DAKOTA INTO SOUTHWEST MINNESOTA WHERE A BLIZZARD WARNING IS IN EFFECT. MNZ071-072-097-SDZ038>040-050-052>060-063-064-201800- /O.CON.KFSD.BZ.W.0005.000000T0000Z-110221T1200Z/ LINCOLN-LYON-PIPESTONE-BEADLE-KINGSBURY-BROOKINGS-GREGORY-JERAULD- SANBORN-MINER-LAKE-MOODY-BRULE-AURORA-DAVISON-HANSON-CHARLES MIX- DOUGLAS- INCLUDING THE CITIES OF...TYLER...HENDRICKS...LAKE BENTON... IVANHOE...MARSHALL...PIPESTONE...HURON...DE SMET...ARLINGTON... LAKE PRESTON...BROOKINGS...GREGORY...BURKE...WESSINGTON SPRINGS... ALPENA...WOONSOCKET...HOWARD...MADISON...FLANDREAU... CHAMBERLAIN...KIMBALL...PLANKINTON...WHITE LAKE...STICKNEY... MITCHELL...ALEXANDRIA...EMERY...WAGNER...PLATTE...LAKE ANDES... MARTY...ARMOUR...CORSICA...DELMONT 400 AM CST SUN FEB 20 2011 ...BLIZZARD WARNING REMAINS IN EFFECT UNTIL 6 AM CST MONDAY... A BLIZZARD WARNING REMAINS IN EFFECT UNTIL 6 AM CST MONDAY. * TIMING...SNOW WILL SPREAD NORTH ACROSS THE AREA EARLY THIS MORNING. SNOW WILL THEN CONTINUE INTO SUNDAY NIGHT...BECOMING HEAVY AT TIMES ON SUNDAY. * ACCUMULATIONS...7 TO 13 INCHES OF SNOW IS EXPECTED THROUGH EARLY MONDAY MORNING. * WIND AND VISIBILITY...WINDS WILL INCREASE TO 20 TO 35 MPH TODAY...WITH GUSTS AROUND 40 MPH. THESE STRONG WINDS WILL PRODUCE WIDESPREAD BLOWING SNOW WITH WHITEOUT CONDITIONS... ESPECIALLY IN OPEN AREAS. * WIND CHILL VALUES...WIND CHILL VALUES OF 10 BELOW TO 18 BELOW WILL BE LIKELY SUNDAY NIGHT ALONG AND WEST OF THE JAMES RIVER. PRECAUTIONARY/PREPAREDNESS ACTIONS... A BLIZZARD WARNING MEANS SEVERE WINTER WEATHER CONDITIONS ARE EXPECTED OR OCCURRING. FALLING AND BLOWING SNOW WITH STRONG WINDS AND POOR VISIBILITIES ARE LIKELY. THIS WILL LEAD TO WHITEOUT CONDITIONS...MAKING TRAVEL EXTREMELY DANGEROUS. DO NOT TRAVEL. IF YOU MUST...HAVE A WINTER SURVIVAL KIT WITH YOU. IF YOU GET STRANDED...STAY WITH YOUR VEHICLE. && $$ IAZ002-003-012>014-SDZ068>071-201800- /O.CON.KFSD.IS.W.0001.000000T0000Z-110221T0600Z/ OSCEOLA-DICKINSON-SIOUX-OBRIEN-CLAY-BON HOMME-YANKTON-UNION- INCLUDING THE CITIES OF...SIBLEY...SPIRIT LAKE...MILFORD... ARNOLDS PARK...ORANGE CITY...SIOUX CENTER...SHELDON...HARTLEY... SANBORN...SPENCER...TYNDALL...SCOTLAND...SPRINGFIELD...AVON... TABOR...YANKTON...VERMILLION...NORTH SIOUX CITY...BERESFORD... ELK POINT...ALCESTER...JEFFERSON 400 AM CST SUN FEB 20 2011 ...ICE STORM WARNING REMAINS IN EFFECT UNTIL MIDNIGHT CST TONIGHT... AN ICE STORM WARNING REMAINS IN EFFECT UNTIL MIDNIGHT CST TONIGHT. * TIMING...SLEET AND FREEZING RAIN WILL SPREAD ACROSS THE AREA EARLY SUNDAY MORNING. THE SLEET AND FREEZING RAIN MAY COME TO AN END FOR A TIME LATE SUNDAY MORNING...BEFORE CHANGING OVER TO SNOW. * ACCUMULATIONS...SIGNIFICANT ICE ACCUMULATIONS OF A QUARTER TO A HALF INCH ARE LIKELY LATE TONIGHT THROUGH SUNDAY. THIS WILL BE TOPPED BY 1 TO 4 INCHES OF SNOW LATER SUNDAY AND SUNDAY NIGHT. * WIND AND VISIBILITY...WINDS WILL INCREASE TO 15 TO 30 MPH ON SUNDAY AND SUNDAY NIGHT...WITH OCCASIONAL GUSTS OF 35 TO 40 MPH POSSIBLE ALONG THE MISSOURI RIVER VALLEY AREA FROM TYNDALL TO YANKTON AND VERMILLION. THESE WINDS WILL CAUSE SIGNIFICANT STRESS ON ICE-LADEN POWER LINES. PRECAUTIONARY/PREPAREDNESS ACTIONS... AN ICE STORM WARNING MEANS SEVERE WINTER WEATHER CONDITIONS ARE EXPECTED OR OCCURRING. SIGNIFICANT AMOUNTS OF ICE ACCUMULATIONS WILL MAKE TRAVEL DANGEROUS OR IMPOSSIBLE. TRAVEL IS STRONGLY DISCOURAGED. COMMERCE WILL LIKELY BE SEVERELY IMPACTED. IF YOU MUST TRAVEL...KEEP AN EXTRA FLASHLIGHT...FOOD...AND WATER IN YOUR VEHICLE IN CASE OF AN EMERGENCY. ICE ACCUMULATIONS AND WINDS WILL LIKELY LEAD TO SNAPPED POWER LINES AND FALLING TREE BRANCHES THAT ADD TO THE DANGER. && $$ IAZ001-MNZ080-081-089-090-098-SDZ061-062-065>067-201800- /O.CON.KFSD.WS.W.0002.000000T0000Z-110221T1200Z/ LYON-MURRAY-COTTONWOOD-NOBLES-JACKSON-ROCK-MCCOOK-MINNEHAHA- HUTCHINSON-TURNER-LINCOLN- INCLUDING THE CITIES OF...ROCK RAPIDS...GEORGE...INWOOD... LARCHWOOD...SLAYTON...FULDA...WINDOM...MOUNTAIN LAKE... WORTHINGTON...JACKSON...LAKEFIELD...LUVERNE...SALEM...CANISTOTA... BRIDGEWATER...MONTROSE...SIOUX FALLS...PARKSTON...FREEMAN... MENNO...TRIPP...PARKER...CENTERVILLE...MARION...VIBORG...HURLEY... CHANCELLOR...CANTON...LENNOX...TEA...HARRISBURG 400 AM CST SUN FEB 20 2011 ...WINTER STORM WARNING REMAINS IN EFFECT UNTIL 6 AM CST MONDAY... A WINTER STORM WARNING REMAINS IN EFFECT UNTIL 6 AM CST MONDAY. * TIMING...A MIX OF FREEZING RAIN...SLEET AND SNOW WILL BECOME WIDESPREAD ACROSS THE REGION EARLY THIS MORNING. THE PRECIPITATION MAY COME TO AN END LATE THIS MORNING...BEFORE CHANGING OVER TO SNOW THIS AFTERNOON INTO TONIGHT. * ACCUMULATIONS...A TIGHT GRADIENT OF BOTH SNOW AND ICE ACCUMULATIONS ARE EXPECTED ACROSS THE AREA. SNOWFALL ACCUMULATIONS WILL VARY FROM 1 TO 3 INCHES SOUTH OF A LINE FROM VIBORG AND CANTON SOUTH DAKOTA TO JACKSON MINNESOTA... TO 6 TO 8 INCHES OR MORE NORTH OF A LINE FROM SIOUX FALLS TO WINDOM. AREAS WITH LESSER SNOWFALL WILL SEE AN INCREASED THREAT FOR SIGNIFICANT ICING...WITH ICE ACCUMULATIONS OF A QUARTER TO HALF INCH POSSIBLE NEAR AND SOUTH OF THAT VIBORG TO CANTON TO JACKSON MINNESOTA LINE. * WIND AND VISIBILITY...WINDS WILL INCREASE TO 20 TO 35 MPH SUNDAY INTO SUNDAY NIGHT. THESE STRONG WINDS WILL PRODUCE BLOWING SNOW... REDUCING VISIBILITY BELOW A HALF MILE... ESPECIALLY IN OPEN AREAS. IN ADDITION...POWER LINE STRESS MAY OCCUR IN AREAS WHERE SIGNIFICANT ICE ACCUMULATIONS ARE SEEN. PRECAUTIONARY/PREPAREDNESS ACTIONS... A WINTER STORM WARNING MEANS SIGNIFICANT AMOUNTS OF SNOW... SLEET...AND ICE ARE EXPECTED OR OCCURRING. STRONG WINDS ARE ALSO POSSIBLE. THIS WILL MAKE TRAVEL VERY HAZARDOUS OR IMPOSSIBLE. && $$ BT
221 WWUS43 KFSD 201657 WSWFSD URGENT - WINTER WEATHER MESSAGE NATIONAL WEATHER SERVICE SIOUX FALLS SD 1057 AM CST SUN FEB 20 2011 .LOW PRESSURE WILL MOVE EAST FROM SOUTHEAST NEBRASKA ACROSS FAR SOUTHERN IOWA TO ILLINOIS TODAY AND TONIGHT. A WINTRY MIX OF PRECIPITATION WILL BE SNOW GENERALLY ALONG AND NORTH OF A LINE FROM TRACY AND PIPESTONE MINNESOTA...TO MITCHELL SOUTH DAKOTA...AND INTO GREGORY COUNTY SOUTH DAKOTA. THIS AREA WILL ALSO SEE STRONG NORTH WINDS... WITH FREQUENT GUSTS OF 30 TO 40 MPH...CAUSING BLIZZARD CONDITIONS IN AREAS. FARTHER TO THE SOUTHEAST...FREEZING RAIN AND SLEET WILL GRADUALLY CHANGE TO SNOW THIS AFTERNOON AND EVENING. SNOW ACCUMULATIONS OF A FEW INCHES CAN BE EXPECTED OVER THE ICE IN SOME AREAS. A STRETCH FROM TYNDALL AND YANKTON SOUTH DAKOTA EAST INTO NORTHWEST IOWA INCLUDING SHELDON AND PRIMGHAR HAS ALREADY SEEN MODERATE TO HEAVY ICE ACCUMULATIONS AND WILL GET SOME MORE ICING INTO THE AFTERNOON. MNZ071-072-097-SDZ038>040-050-052>060-063-064-210100- /O.CON.KFSD.BZ.W.0005.000000T0000Z-110221T1200Z/ LINCOLN-LYON-PIPESTONE-BEADLE-KINGSBURY-BROOKINGS-GREGORY-JERAULD- SANBORN-MINER-LAKE-MOODY-BRULE-AURORA-DAVISON-HANSON-CHARLES MIX- DOUGLAS- INCLUDING THE CITIES OF...TYLER...HENDRICKS...LAKE BENTON... IVANHOE...MARSHALL...PIPESTONE...HURON...DE SMET...ARLINGTON... LAKE PRESTON...BROOKINGS...GREGORY...BURKE...WESSINGTON SPRINGS... ALPENA...WOONSOCKET...HOWARD...MADISON...FLANDREAU... CHAMBERLAIN...KIMBALL...PLANKINTON...WHITE LAKE...STICKNEY... MITCHELL...ALEXANDRIA...EMERY...WAGNER...PLATTE...LAKE ANDES... MARTY...ARMOUR...CORSICA...DELMONT 1057 AM CST SUN FEB 20 2011 ...BLIZZARD WARNING REMAINS IN EFFECT UNTIL 6 AM CST MONDAY... A BLIZZARD WARNING REMAINS IN EFFECT UNTIL 6 AM CST MONDAY. * TIMING...SNOW WILL CONTINUE ACROSS THE AREA THROUGH THIS AFTERNOON AND INTO TONIGHT. * ACCUMULATIONS...4 TO 11 INCHES IS EXPECTED ALONG AND NORTH OF INTERSTATE 90 WITH 2 TO 4 INCHES SOUTH OF THE INTERSTATE. * WIND AND VISIBILITY...NORTH WINDS WILL AVERAGE 20 TO 30 MPH WITH GUSTS BETWEEN 30 AND 40 MPH. THESE WINDS WILL PRODUCE BLOWING SNOW WITH SOME WHITEOUT CONDITIONS...ESPECIALLY IN OPEN AREAS. * WIND CHILL VALUES...WIND CHILL VALUES OF 10 BELOW TO 18 BELOW WILL BE LIKELY TONIGHT ALONG AND WEST OF THE JAMES RIVER. PRECAUTIONARY/PREPAREDNESS ACTIONS... A BLIZZARD WARNING MEANS SEVERE WINTER WEATHER CONDITIONS ARE EXPECTED OR OCCURRING. FALLING AND BLOWING SNOW WITH STRONG WINDS AND POOR VISIBILITIES ARE LIKELY. THIS WILL LEAD TO WHITEOUT CONDITIONS...MAKING TRAVEL EXTREMELY DANGEROUS. DO NOT TRAVEL. IF YOU MUST...HAVE A WINTER SURVIVAL KIT WITH YOU. IF YOU GET STRANDED...STAY WITH YOUR VEHICLE. && $$ IAZ002-003-012>014-SDZ068>071-210100- /O.CON.KFSD.IS.W.0001.000000T0000Z-110221T0600Z/ OSCEOLA-DICKINSON-SIOUX-OBRIEN-CLAY-BON HOMME-YANKTON-UNION- INCLUDING THE CITIES OF...SIBLEY...SPIRIT LAKE...MILFORD... ARNOLDS PARK...ORANGE CITY...SIOUX CENTER...SHELDON...HARTLEY... SANBORN...SPENCER...TYNDALL...SCOTLAND...SPRINGFIELD...AVON... TABOR...YANKTON...VERMILLION...NORTH SIOUX CITY...BERESFORD... ELK POINT...ALCESTER...JEFFERSON 1057 AM CST SUN FEB 20 2011 ...ICE STORM WARNING REMAINS IN EFFECT UNTIL MIDNIGHT CST TONIGHT... AN ICE STORM WARNING REMAINS IN EFFECT UNTIL MIDNIGHT CST TONIGHT. * TIMING...OCCASIONAL FREEZING RAIN MIXED WITH SLEET WILL CONTINUE THIS AFTERNOON IS EXPECTED TO GRADUALLY CHANGE TO LIGHT SNOW LATE THIS AFTERNOON AND THIS EVENING. * ACCUMULATIONS...SIGNIFICANT ICE ACCUMULATIONS OF A QUARTER TO A HALF INCH WERE ALREADY REPORTED OVER MOST OF THE AREA THIS MORNING. ADDITIONAL ICE ACCUMULATIONS OF A TENTH INCH OR LESS ARE EXPECTED. * WIND AND VISIBILITY...NORTH WINDS WILL INCREASE TO 15 TO 30 MPH THIS AFTERNOON...CAUSING STRESS ON ICE-LADEN POWER LINES AND TREES. PRECAUTIONARY/PREPAREDNESS ACTIONS... AN ICE STORM WARNING MEANS SEVERE WINTER WEATHER CONDITIONS ARE EXPECTED OR OCCURRING. SIGNIFICANT AMOUNTS OF ICE ACCUMULATIONS WILL MAKE TRAVEL DANGEROUS OR IMPOSSIBLE. TRAVEL IS STRONGLY DISCOURAGED. COMMERCE WILL LIKELY BE SEVERELY IMPACTED. IF YOU MUST TRAVEL...KEEP AN EXTRA FLASHLIGHT...FOOD...AND WATER IN YOUR VEHICLE IN CASE OF AN EMERGENCY. ICE ACCUMULATIONS AND WINDS WILL LIKELY LEAD TO SNAPPED POWER LINES AND FALLING TREE BRANCHES THAT ADD TO THE DANGER. && $$ IAZ001-MNZ080-081-089-090-098-SDZ061-062-065>067-210100- /O.CON.KFSD.WS.W.0002.000000T0000Z-110221T1200Z/ LYON-MURRAY-COTTONWOOD-NOBLES-JACKSON-ROCK-MCCOOK-MINNEHAHA- HUTCHINSON-TURNER-LINCOLN- INCLUDING THE CITIES OF...ROCK RAPIDS...GEORGE...INWOOD... LARCHWOOD...SLAYTON...FULDA...WINDOM...MOUNTAIN LAKE... WORTHINGTON...JACKSON...LAKEFIELD...LUVERNE...SALEM...CANISTOTA... BRIDGEWATER...MONTROSE...SIOUX FALLS...PARKSTON...FREEMAN... MENNO...TRIPP...PARKER...CENTERVILLE...MARION...VIBORG...HURLEY... CHANCELLOR...CANTON...LENNOX...TEA...HARRISBURG 1057 AM CST SUN FEB 20 2011 ...WINTER STORM WARNING REMAINS IN EFFECT UNTIL 6 AM CST MONDAY... A WINTER STORM WARNING REMAINS IN EFFECT UNTIL 6 AM CST MONDAY. * TIMING...A MIX OF FREEZING RAIN...SLEET AND SNOW WILL CHANGE TO SNOW FROM THE NORTHWEST THIS AFTERNOON AND EARLY EVENING. * ACCUMULATIONS...A TIGHT GRADIENT OF BOTH SNOW AND ICE ACCUMULATIONS ARE EXPECTED ACROSS THE AREA. SNOW ACCUMULATIONS WILL VARY FROM 1 TO 3 INCHES SOUTH OF INTERSTATE 90...TO 3 TO 6 INCHES OR MORE NORTH OF A LINE FROM SIOUX FALLS TO WINDOM. ICE ACCUMULATIONS OF A TENTH OF AN INCH OR SO HAVE ALREADY BEEN REPORTED IN MOST OF THE AREA. * WIND AND VISIBILITY...NORTH WINDS WILL INCREASE TO 20 TO 35 MPH THIS AFTERNOON AND CONTINUE TONIGHT. THESE STRONG WINDS WILL PRODUCE SOME AREAS OF BLOWING SNOW...MAINLY IN OPEN AREAS...WITH LOCAL VISIBILITIES BELOW OF HALF MILE OR LESS. IN ADDITION... POWER LINE AND TREE STRESS MAY OCCUR IN AREAS WHERE SIGNIFICANT ICE ACCUMULATIONS ARE SEEN. PRECAUTIONARY/PREPAREDNESS ACTIONS... A WINTER STORM WARNING MEANS SIGNIFICANT AMOUNTS OF SNOW... SLEET...AND ICE ARE EXPECTED OR OCCURRING. STRONG WINDS ARE ALSO POSSIBLE. THIS WILL MAKE TRAVEL VERY HAZARDOUS OR IMPOSSIBLE. && $$ WILLIAMS
682 WWUS43 KFSD 202125 WSWFSD URGENT - WINTER WEATHER MESSAGE NATIONAL WEATHER SERVICE SIOUX FALLS SD 325 PM CST SUN FEB 20 2011 .LOW PRESSURE OVER SOUTHWESTERN IOWA WILL CONTINUE TO MOVE TO THE EAST LATE THIS AFTERNOON AND TONIGHT...PUSHING INTO ILLINOIS BY EARLY ON MONDAY. THE SYSTEM WILL BRING A WINTRY MIX OF PRECIPITATION INTO EARLY THIS EVENING...BEFORE TRANSITIONING TO ALL SNOW BY LATER IN THE EVENING. LITTLE ADDITIONAL ICE ACCUMULATION IS EXPECTED...WITH ADDITIONAL SNOW ACCUMULATION OF 1 TO 3 INCHES POSSIBLE NORTH OF INTERSTATE 90 THROUGH THE NIGHT. IN ADDITION...NORTHERLY WINDS GUSTING TO 30 TO 40 MPH WILL CAUSE BLIZZARD CONDITIONS IN AREAS WHICH RECEIVED HEAVY SNOW. SDZ050-063-064-210530- /O.CAN.KFSD.BZ.W.0005.000000T0000Z-110221T1200Z/ /O.NEW.KFSD.WW.Y.0031.110220T2125Z-110221T1200Z/ GREGORY-CHARLES MIX-DOUGLAS- INCLUDING THE CITIES OF...GREGORY...BURKE...WAGNER...PLATTE... LAKE ANDES...MARTY...ARMOUR...CORSICA...DELMONT 325 PM CST SUN FEB 20 2011 ...WINTER WEATHER ADVISORY IN EFFECT UNTIL 6 AM CST MONDAY... ...BLIZZARD WARNING IS CANCELLED... THE NATIONAL WEATHER SERVICE IN SIOUX FALLS HAS ISSUED A WINTER WEATHER ADVISORY FOR BLOWING SNOW...WHICH IS IN EFFECT UNTIL 6 AM CST MONDAY. THE BLIZZARD WARNING HAS BEEN CANCELLED. * TIMING...NORTHWESTERLY WINDS WILL CONTINUE TO INCREASE THROUGH THE EVENING...AND REMAIN STRONG THROUGH THE NIGHT. * ACCUMULATIONS...WHILE LIGHT SNOW WILL CONTINUE THROUGH TONIGHT...ANY ADDITIONAL ACCUMULATION WILL BE LESS THAN HALF AN INCH. * WIND AND VISIBILITY...NORTHWESTERLY WINDS WILL AVERAGE 20 TO 30 MPH WITH GUSTS BETWEEN 30 AND 40 MPH. THESE WINDS WILL PRODUCE BLOWING SNOW WHICH WILL REDUCE VISIBILITIES...ESPECIALLY IN OPEN AREAS. * WIND CHILL VALUES...WIND CHILL VALUES OF 10 BELOW TO 15 BELOW WILL BE LIKELY TONIGHT ALONG AND WEST OF THE JAMES RIVER. PRECAUTIONARY/PREPAREDNESS ACTIONS... A WINTER WEATHER ADVISORY FOR BLOWING SNOW MEANS THAT VISIBILITIES WILL BE LIMITED DUE TO STRONG WINDS BLOWING SNOW AROUND. USE CAUTION WHEN TRAVELING...ESPECIALLY IN OPEN AREAS. && $$ IAZ002-003-210530- /O.CAN.KFSD.IS.W.0001.000000T0000Z-110221T0600Z/ /O.NEW.KFSD.WW.Y.0031.110220T2125Z-110221T0600Z/ OSCEOLA-DICKINSON- INCLUDING THE CITIES OF...SIBLEY...SPIRIT LAKE...MILFORD... ARNOLDS PARK 325 PM CST SUN FEB 20 2011 ...WINTER WEATHER ADVISORY IN EFFECT UNTIL MIDNIGHT CST TONIGHT... ...ICE STORM WARNING IS CANCELLED... THE NATIONAL WEATHER SERVICE IN SIOUX FALLS HAS ISSUED A WINTER WEATHER ADVISORY FOR MIXED PRECIPITATION...WHICH IS IN EFFECT UNTIL MIDNIGHT CST TONIGHT. THE ICE STORM WARNING HAS BEEN CANCELLED. * TIMING...AREAS OF LIGHT FREEZING RAIN OR SLEET WILL CHANGE TO LIGHT SNOW BY THIS EVENING. * ACCUMULATIONS...ANY ADDITIONAL ICE ACCUMULATIONS WILL BE LIGHT... WITH LESS THAN AN INCH OF SNOW ACCUMULATION EXPECTED THIS EVENING. * WIND AND VISIBILITY...NORTHEAST WINDS OF 15 TO 25 MPH WILL SWITCH AROUND TO THE NORTH THIS EVENING. THE WINDS COULD CAUSE SOME STRESS ON ICE-LADEN POWER LINES AND TREES. PRECAUTIONARY/PREPAREDNESS ACTIONS... A WINTER WEATHER ADVISORY MEANS THAT PERIODS OF SNOW...SLEET...OR FREEZING RAIN WILL CAUSE TRAVEL DIFFICULTIES. BE PREPARED FOR SLIPPERY ROADS AND LIMITED VISIBILITIES...AND USE CAUTION WHILE DRIVING. && $$ IAZ012>014-SDZ068>071-202230- /O.CAN.KFSD.IS.W.0001.000000T0000Z-110221T0600Z/ SIOUX-OBRIEN-CLAY-BON HOMME-YANKTON-UNION- INCLUDING THE CITIES OF...ORANGE CITY...SIOUX CENTER...SHELDON... HARTLEY...SANBORN...SPENCER...TYNDALL...SCOTLAND...SPRINGFIELD... AVON...TABOR...YANKTON...VERMILLION...NORTH SIOUX CITY... BERESFORD...ELK POINT...ALCESTER...JEFFERSON 325 PM CST SUN FEB 20 2011 ...ICE STORM WARNING IS CANCELLED... THE NATIONAL WEATHER SERVICE IN SIOUX FALLS HAS CANCELLED THE ICE STORM WARNING. PRECIPITATION HAS TAPERED OFF ACROSS THE AREA...WITH LITTLE IF ANY ADDITIONAL ICE OR SNOW ACCUMULATION EXPECTED OVERNIGHT. $$ IAZ001-MNZ098-SDZ061-062-065>067-210530- /O.CAN.KFSD.WS.W.0002.000000T0000Z-110221T1200Z/ /O.NEW.KFSD.WW.Y.0031.110220T2125Z-110221T0600Z/ LYON-ROCK-MCCOOK-MINNEHAHA-HUTCHINSON-TURNER-LINCOLN- INCLUDING THE CITIES OF...ROCK RAPIDS...GEORGE...INWOOD... LARCHWOOD...LUVERNE...SALEM...CANISTOTA...BRIDGEWATER... MONTROSE...SIOUX FALLS...PARKSTON...FREEMAN...MENNO...TRIPP... PARKER...CENTERVILLE...MARION...VIBORG...HURLEY...CHANCELLOR... CANTON...LENNOX...TEA...HARRISBURG 325 PM CST SUN FEB 20 2011 ...WINTER WEATHER ADVISORY IN EFFECT UNTIL MIDNIGHT CST TONIGHT... ...WINTER STORM WARNING IS CANCELLED... THE NATIONAL WEATHER SERVICE IN SIOUX FALLS HAS ISSUED A WINTER WEATHER ADVISORY FOR MIXED PRECIPITATION...WHICH IS IN EFFECT UNTIL MIDNIGHT CST TONIGHT. THE WINTER STORM WARNING HAS BEEN CANCELLED. * TIMING...A MIX OF FREEZING DRIZZLE...SLEET AND SNOW WILL CHANGE TO SNOW FROM WEST TO EAST THROUGH THE EARLY EVENING. * ACCUMULATIONS...LITTLE IF ANY ADDITIONAL ICE ACCUMULATION IS EXPECTED. SNOW ACCUMULATIONS THIS EVENING WILL BE AROUND AN INCH OR LESS. * WIND AND VISIBILITY...NORTH WINDS OF 15 TO 25 MPH ARE EXPECTED THIS EVENING. THESE WINDS MAY CAUSE SOME STRESS ON ICE-LADEN POWER LINES AND TREES IN THOSE AREAS WHERE SIGNIFICANT ICE ACCUMULATIONS HAVE BEEN SEEN. PRECAUTIONARY/PREPAREDNESS ACTIONS... A WINTER WEATHER ADVISORY MEANS THAT PERIODS OF SNOW...SLEET...OR FREEZING RAIN WILL CAUSE TRAVEL DIFFICULTIES. BE PREPARED FOR SLIPPERY ROADS AND LIMITED VISIBILITIES...AND USE CAUTION WHILE DRIVING. && $$ MNZ071-072-097-SDZ038>040-052>060-210530- /O.CON.KFSD.BZ.W.0005.000000T0000Z-110221T1200Z/ LINCOLN-LYON-PIPESTONE-BEADLE-KINGSBURY-BROOKINGS-JERAULD-SANBORN- MINER-LAKE-MOODY-BRULE-AURORA-DAVISON-HANSON- INCLUDING THE CITIES OF...TYLER...HENDRICKS...LAKE BENTON... IVANHOE...MARSHALL...PIPESTONE...HURON...DE SMET...ARLINGTON... LAKE PRESTON...BROOKINGS...WESSINGTON SPRINGS...ALPENA... WOONSOCKET...HOWARD...MADISON...FLANDREAU...CHAMBERLAIN... KIMBALL...PLANKINTON...WHITE LAKE...STICKNEY...MITCHELL... ALEXANDRIA...EMERY 325 PM CST SUN FEB 20 2011 ...BLIZZARD WARNING REMAINS IN EFFECT UNTIL 6 AM CST MONDAY... A BLIZZARD WARNING REMAINS IN EFFECT UNTIL 6 AM CST MONDAY. * TIMING...SNOW WILL CONTINUE ACROSS THE AREA THROUGH THIS EVENING...THEN TAPER OFF AFTER MIDNIGHT. * ACCUMULATIONS...ADDITIONAL SNOW ACCUMULATIONS THROUGH THE LATE AFTERNOON AND OVERNIGHT WILL RANGE FROM LESS THAN AN INCH ALONG I-90...UP TO 2 TO 4 INCHES ALONG HIGHWAY 14 FROM BROOKINGS TO MARSHALL. * WIND AND VISIBILITY...NORTH WINDS WILL AVERAGE 20 TO 30 MPH WITH GUSTS TO AROUND 35 MPH. THESE WINDS WILL PRODUCE BLOWING SNOW WITH SOME WHITEOUT CONDITIONS...ESPECIALLY IN OPEN AREAS. * WIND CHILL VALUES...WIND CHILL VALUES OF 10 BELOW TO 15 BELOW WILL BE LIKELY TONIGHT ALONG AND WEST OF THE JAMES RIVER. PRECAUTIONARY/PREPAREDNESS ACTIONS... A BLIZZARD WARNING MEANS SEVERE WINTER WEATHER CONDITIONS ARE EXPECTED OR OCCURRING. FALLING AND BLOWING SNOW WITH STRONG WINDS AND POOR VISIBILITIES ARE LIKELY. THIS WILL LEAD TO WHITEOUT CONDITIONS...MAKING TRAVEL EXTREMELY DANGEROUS. DO NOT TRAVEL. IF YOU MUST...HAVE A WINTER SURVIVAL KIT WITH YOU. IF YOU GET STRANDED...STAY WITH YOUR VEHICLE. && $$ MNZ080-081-089-090-210530- /O.CON.KFSD.WS.W.0002.000000T0000Z-110221T1200Z/ MURRAY-COTTONWOOD-NOBLES-JACKSON- INCLUDING THE CITIES OF...SLAYTON...FULDA...WINDOM... MOUNTAIN LAKE...WORTHINGTON...JACKSON...LAKEFIELD 325 PM CST SUN FEB 20 2011 ...WINTER STORM WARNING REMAINS IN EFFECT UNTIL 6 AM CST MONDAY... A WINTER STORM WARNING REMAINS IN EFFECT UNTIL 6 AM CST MONDAY. * TIMING...A MIX OF FREEZING RAIN...SLEET AND SNOW WILL CHANGE TO SNOW THIS EVENING. * ACCUMULATIONS...ADDITIONAL SNOW ACCUMULATIONS OF 1 TO 3 INCHES ARE POSSIBLE TONIGHT...WITH THE HIGHER ACCUMULATIONS NORTH OF HIGHWAY 30. LITTLE IF ANY ADDITIONAL ICE ACCUMULATION IS EXPECTED. * WIND AND VISIBILITY...NORTHEAST WINDS OF 15 TO 30 MPH WILL SWITCH TO THE NORTH TONIGHT. THESE STRONG WINDS COULD PRODUCE LOCALIZED BLOWING SNOW...MAINLY IN OPEN AREAS...WITH OCCASIONAL VISIBILITIES BELOW A MILE. IN ADDITION... POWER LINE AND TREE STRESS MAY OCCUR IN AREAS WHERE SIGNIFICANT ICE ACCUMULATIONS HAVE BEEN SEEN. PRECAUTIONARY/PREPAREDNESS ACTIONS... A WINTER STORM WARNING MEANS SIGNIFICANT AMOUNTS OF SNOW... SLEET...AND ICE ARE EXPECTED OR OCCURRING. STRONG WINDS ARE ALSO POSSIBLE. THIS WILL MAKE TRAVEL VERY HAZARDOUS OR IMPOSSIBLE. && $$ JM/JH
What forecasters said that day
The local office's own words before this ice storm warning went out, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.
NWS Sioux Falls, SD wrote its last area forecast discussion before this ice storm warning went out at Feb 19, 10:15 AM CST, 5 hours 22 minutes earlier.
Area forecast discussion, Feb 19, 10:15 AM CST, 5 hours 22 minutes before
AREA FORECAST DISCUSSION FOR SOUTHEAST SD/SOUTHWEST MN/NORTHWEST IA
NATIONAL WEATHER SERVICE SIOUX FALLS SD
1015 AM CST SAT FEB 19 2011
.DISCUSSION...
LOW CLOUDS ADVANCING INTO AREA FROM THE NW A LITTLE SLOWER THAN
EARLIER FORECAST. ONT HE OTHER HAND...EARLIER TEMPS LOOKED TO WARM
IN THE SHALLOW BUT DEEPENING COOL AIR NORTH AND ESPECIALLY FAR WEST.
EVEN LOOKED SLIGHTLY TOO WARM SOUTHEAST. HAVE ADJUSTED ACCORDINGLY.
WILL PROBABLY ADD SOME FLRYS TO THE FREEZING DRIZZLE AND SLOW THAT
TRACE EVENT DOWN IN ACCORDANCE WITH THE SLOWER STRATUS ADVANCE.
&&
.AVIATION...
VFR CEILINGS WILL TRANSITION TO MVFR WITH AREAS OF IFR CIGS FROM THE
WEST NOW THRU 03Z...OR SLOWER THAN WE HAD BEFORE. A FEW AREAS OF
TRACE -SN AND -FZDZ MAY STILL DEVELOP MAINLY WEST WITH A FEW AREAS
OF 3-5SM POSSIBLE. AS MAJOR SYSTEM APPROACHES AFTER 00Z...SNOW WILL
DEVELOP ALONG AND NORTH OF I-90 WITH MVFR TO IFR CEILINGS.
IMMEDIATELY SOUTH THERE COULD BE AN AREA OF FREEZING RAIN ACROSS FAR
SOUTHEASTERN SOUTH DAKOTA INTO NORTHWEST IOWA. PRECIP SHOULD
PRIMARILY REMAIN AS RAIN AT KSUX TAF SITE THRU 20/15Z. THE RAPID
INCREASE IN SNOW AND WINDS WILL CAUSE AREAS OF BLOWING SNOW AND
REDUCING VISIBILITIES BELOW 1 SM AFTER 12Z SUNDAY NORTHERN AND
WESTERN PARTS OF FORECAST AREA. / WILLIAMS
&&
.PREV DISCUSSION...
COLD/DRY HIGH PRESSURE FROM THE NORTH STILL AFFECTING THE AREA THIS
MORNING...HOWEVER THE SOUTHERN CWA IS SLOWLY BEGINNING TO RESPOND TO
THE DEVELOPING WAVE MOVING INTO THE ROCKIES. WINDS HAVE INCREASED
OVER THE SOUTHERN CWA WITH TEMPERATURES HOLDING STEADY OR SLIGHTLY
RISING WHILE THE NORTHERN CWA HAS SEEN DEW POINTS DROP INTO THE
SINGLE DIGITS WITH TEMPERATURES TRENDING THAT WAY. WILL KEEP THIS
TREND IN PLACE THROUGH THE MORNING WITH THE EASTERN CWA SLOW TO
RECOVER UNDER EAST/NORTHEAST FLOW. BY LATE MORNING INTO THE EARLY
AFTERNOON...TEMPERATURES WILL RISE EVERYWHERE WITH ANOTHER FAIRLY
MILD DAY TO AROUND NORMAL DAY. HAVE HIGHS RANGING FROM THE LOWER 30S
OVER THE NORTHERN TIER OF COUNTIES TO THE MID 40S OVER THE FAR
SOUTHERN CWA. WILL LEAVE A LITTLE PATCHY LIGHT FREEZING DRIZZLE IN
THE FAR WEST TODAY...BUT CONFIDENCE IN THIS NOT VERY HIGH.
UPPER LEVEL SUPPORT BEGINS TO SPREAD ACROSS THE CENTRAL PLAINS
TONIGHT WITH VERY STRONG LOW AND MID LEVEL SOUTHERLY FLOW
DEVELOPING. THE BIGGEST CHALLENGE FOR THIS ENTIRE EVENT IS THE
THERMAL PROFILE WITH A VERY TIGHT WARM THERMAL RIBBON SETTING UP
ACROSS THE REGION LATE SATURDAY NIGHT THROUGH EARLY SUNDAY
AFTERNOON. MODEL SOUNDINGS VERY SUPPORTIVE OF FREEZING RAIN ON THE
SOUTHERN END OF THE SNOW. FOR NOW WILL KEEP THE BEST CHANCE FOR
FREEZING RAIN NEAR A LINE FROM YANKTON TO SPENCER IOWA WHERE A
QUARTER TO A HALF AN INCH OF ICE MAY BE POSSIBLE. THE HEAVIER SNOW
SHOULD BE FARTHER TO THE NORTH HOWEVER...SO ONLY AN INCH OR TWO OF
SNOW ACCUMULATION ALONG THIS LINE. WITH THIS IN MIND AND THE FACT
THAT ONLY A SHIFT OF 30 TO 50 MILES TO THE NORTH WOULD BRING A
MAINLY RAIN THREAT...WILL LEAVE THIS AREA IN A WINTER STORM WATCH
UNTIL CONFIDENCE IN THE PATH IS A LITTLE HIGHER. AREAS TO THE NORTH
OF THIS...MAINLY ALONG AND NORTH OF INTERSTATE 90 WILL BE UPGRADED
TO A WARNING AS THIS AREAS HAS A MUCH HIGHER PROBABILITY OF
EXCEEDING WARNING CRITERIA FOR SNOWFALL. EXPECT A VERY SHARP
SOUTHERN CUTOFF TO THE HEAVY SNOW AND RIGHT NOW WILL HAVE 2 TO 3
INCHES FROM JUST NORTH OF YANKTON TO AROUND CANTON TO SPENCER IOWA
WHILE THE I90 CORRIDOR WILL LIKELY SEE 6 TO 8 INCHES OF SNOW.
FARTHER TO THE NORTH NEAR HIGHWAY 14...SNOWFALL AMOUNTS ARE LIKELY
MEET OR EXCEED A FOOT. OVERALL...THIS SYSTEM AS A TON OF MOISTURE TO
WORK WITH...WITH PRECIPITABLE WATER VALUES ACROSS NEBRASKA AROUND
1.10 INCHES...AND INSTABILITY ALSO PRETTY POTENT JUST SOUTH OF THE
CWA SO PRECIPITATION RATES COULD BE FAIRLY HIGH AT
TIMES...ESPECIALLY DURING THE DAY ON SUNDAY. WOULD NOT BE SURPRISED
TO SEE 1-2 INCH PER HOUR SNOWFALL RATES ACROSS THE NORTHERN CWA FOR
A COUPLE OF HOURS.
EXPECT THE SNOWFALL TO TAPER OFF ON MONDAY WITH FAIRLY COLD
TEMPERATURES TO START THE WEEK. DID LOWER HIGHS AND LOWS
MONDAY...MONDAY NIGHT AND TUESDAY WITH A BIT OF A WARM UP EXPECTED
WEDNESDAY AHEAD OF THE NEXT SYSTEM OF INTEREST FOR THURSDAY. /08
&&
.FSD WATCHES/WARNINGS/ADVISORIES...
IA...WINTER STORM WARNING FROM 3 AM SUNDAY TO 6 AM CST MONDAY FOR
IAZ001.
WINTER STORM WATCH FROM LATE TONIGHT THROUGH SUNDAY EVENING FOR
IAZ002-003-012>014.
MN...WINTER STORM WARNING FROM 3 AM SUNDAY TO 6 AM CST MONDAY FOR
MNZ089-090-098.
WINTER STORM WARNING FROM 6 AM SUNDAY TO 6 AM CST MONDAY FOR
MNZ071-072-080-081-097.
NE...NONE.
SD...WINTER STORM WARNING FROM 3 AM SUNDAY TO 6 AM CST MONDAY FOR
SDZ059>062-065>067.
WINTER STORM WATCH FROM LATE TONIGHT THROUGH SUNDAY EVENING FOR
SDZ050-063-064-068>071.
WINTER STORM WARNING FROM 6 AM SUNDAY TO 6 AM CST MONDAY FOR
SDZ038>040-052>058.
&&
WILLIAMSHazardous weather outlook, Feb 19, 4:53 AM CST, 10 hours 44 minutes before
HAZARDOUS WEATHER OUTLOOK NATIONAL WEATHER SERVICE SIOUX FALLS SD 0453 AM CST SAT FEB 19 2011 SDZ038>040-050-052>071-MNZ071-072-080-081-089-090-097-098- IAZ001>003-012>014-020>022-031-032-NEZ013-014-201200- AURORA-BEADLE-BON HOMME-BROOKINGS-BRULE-BUENA VISTA IA- CHARLES MIX-CHEROKEE IA-CLAY-CLAY IA-COTTONWOOD MN-DAKOTA NE- DAVISON-DICKINSON IA-DIXON NE-DOUGLAS-GREGORY-HANSON-HUTCHINSON- IDA IA-JACKSON MN-JERAULD-KINGSBURY-LAKE-LINCOLN-LINCOLN MN- LYON IA-LYON MN-MCCOOK-MINER-MINNEHAHA-MOODY-MURRAY MN-NOBLES MN- OBRIEN IA-OSCEOLA IA-PIPESTONE MN-PLYMOUTH IA-ROCK MN-SANBORN- SIOUX IA-TURNER-UNION-WOODBURY IA-YANKTON- 0453 AM CST SAT FEB 19 2011 THIS HAZARDOUS WEATHER OUTLOOK IS FOR SOUTHEAST SOUTH DAKOTA... SOUTHWEST MINNESOTA...NORTHWEST IOWA...AND NORTHEAST NEBRASKA. .DAY ONE...TODAY AND TONIGHT FLOODING... MINOR LOWLAND RIVER FLOODING DUE TO SNOWMELT WILL CONTINUE TODAY ON THE LITTLE SIOUX RIVER NEAR SPENCER...AS WELL AS WILLOW CREEK NEAR CROOKS. WINTER WEATHER... A BAND OF FREEZING RAIN...SLEET AND SNOW WILL MOVE INTO THE REGION BEFORE MIDNIGHT...BECOMING MORE ORGANIZED BY SUNRISE SUNDAY MORNING. MAINLY SNOW IS EXPECTED NORTH OF INTERSTATE 90 WHILE A MIX OF SLEET...SNOW AND FREEZING RAIN WILL BE POSSIBLE ALONG AND SOUTH OF INTERSTATE 90. SNOWFALL AMOUNTS OF 2 TO 4 INCHES WILL BE POSSIBLE IN CENTRAL SOUTH DAKOTA BY EARLY SUNDAY MORNING WITH LESSER AMOUNTS TO THE EAST. ICING OF A TENTH TO TWO TENTHS OF AN INCH WILL BE POSSIBLE OVERNIGHT. .DAYS TWO THROUGH SEVEN...SUNDAY THROUGH FRIDAY SNOW AND FREEZING RAIN WILL BE WIDESPREAD ACROSS THE AREA ON SUNDAY...TRENDING TOWARDS MAINLY SNOW BY AFTERNOON. SNOWFALL RATES OF 1 TO 2 INCHES PER HOUR WILL BE POSSIBLE NORTH OF INTERSTATE 90 WITH NORTH WINDS INCREASING TO 20 TO 40 MPH...CREATING AREAS OF BLOWING SNOW. SNOWFALL AMOUNT OF 8 TO 12 INCHES WILL BE POSSIBLE ALONG AND NORTH OF INTERSTATE 90 WITH SOME AREAS POSSIBLY APPROACHING 15 INCHES ALONG HIGHWAY 14. JUST SOUTH OF INTERSTATE 90 FREEZING RAIN WILL STILL BE POSSIBLE ON SUNDAY MORNING WITH A QUARTER TO A HALF AN INCH OF ACCUMULATION POSSIBLE. AROUND THE SIOUX CITY AND STORM LAKE AREAS RAIN AND ISOLATED THUNDERSTORMS WILL BE POSSIBLE IN THE MORNING WITH A CHANCE FOR SNOW AND FREEZING RAIN IN THE AFTERNOON. MUCH OF THE ACTIVITY WILL WIND DOWN AFTER MIDNIGHT...ALTHOUGH SOME BLOWING SNOW MAY CONTINUE...ESPECIALLY IN LOCATIONS THAT RECEIVE 8 INCHES OR MORE OF SNOW. .SPOTTER INFORMATION STATEMENT... SPOTTER ACTIVATION WILL NOT BE NEEDED TODAY AND TONIGHT. && FOR MORE INFORMATION PLEASE VISIT OUR WEBSITE AT WWW.WEATHER.GOV/SIOUXFALLS. THIS INCLUDES THE GRAPHICAL HAZARDOUS WEATHER OUTLOOK.
The office that day
Everything else NWS Sioux Falls, SD issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Feb 19, 4:07 AM CST | Winter Storm Warning | FSD | Aurora, Beadle, Brookings, Brule, Davison, Hanson and 11 more | 41 hr |
| Feb 19, 3:37 PM CST | Blizzard Warning | FSD | Aurora, Beadle, Brookings, Brule, Charles Mix, Davison and 9 more | 30 hr |
Nearby
Ice Storm Warnings in Iowa, 2011Ice Storm Warnings in South Dakota, 2011Every ice storm warning in 2011
Sources
The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.