Alert archive / South Dakota / Winter Weather Advisories in 2013
Winter Weather Advisory 21, NWS Sioux Falls, SD
NWS Sioux Falls, SD issued this winter weather advisory at Apr 21, 2013, 4:05 PM CDT for 24 counties in South Dakota; 5 counties in Iowa; 8 counties in Minnesota. It took effect at Apr 22, 2013, 5:00 AM CDT. It was in force for 17 hr.
The area
The counties it named.
The facts
- Issued
- Apr 21, 2013, 4:05 PM CDT (21:05 UTC)
- In effect from
- Apr 22, 2013, 5:00 AM CDT
- Expired
- Apr 22, 2013, 10:00 PM CDT
- In force
- 17 hr
- Issued by
- NWS Sioux Falls, SD
All 37 counties
Dickinson County, IA, Lyon County, IA, O'Brien County, IA, Osceola County, IA, Sioux County, IA, Cottonwood County, MN, Jackson County, MN, Lincoln County, MN, Lyon County, MN, Murray County, MN, Nobles County, MN, Pipestone County, MN, Rock County, MN, Aurora County, SD, Beadle County, SD, Bon Homme County, SD, Brookings County, SD, Brule County, SD, Charles Mix County, SD, Clay County, SD, Davison County, SD, Douglas County, SD, Gregory County, SD, Hanson County, SD, Hutchinson County, SD, Jerauld County, SD, Kingsbury County, SD, Lake County, SD, Lincoln County, SD, McCook County, SD, Miner County, SD, Minnehaha County, SD, Moody County, SD, Sanborn County, SD, Turner County, SD, Union County, SD, Yankton County, SD
The radar
The Sioux Falls radar (KFSD), 26 km from the middle of the area, began a volume at 21:05 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
Aberdeen, SD (KABR), launched 12:00Z, 9.1 hours before the alert went out and 176 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
- 931 m above ground
- 0-6 km bulk shear
- 35 kt
- 0-1 km storm-relative helicity
- 259 m²/s²
- 0-3 km storm-relative helicity
- 276 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted, in the capitals the NWS used until 2016.
219 WWUS43 KFSD 212105 WSWFSD URGENT - WINTER WEATHER MESSAGE NATIONAL WEATHER SERVICE SIOUX FALLS SD 405 PM CDT SUN APR 21 2013 SDZ050-052-057>059-063-064-220515- /O.NEW.KFSD.WW.Y.0021.130422T1000Z-130423T0000Z/ GREGORY-JERAULD-BRULE-AURORA-DAVISON-CHARLES MIX-DOUGLAS- INCLUDING THE CITIES OF...GREGORY...BURKE...WESSINGTON SPRINGS... ALPENA...CHAMBERLAIN...KIMBALL...PLANKINTON...WHITE LAKE... STICKNEY...MITCHELL...WAGNER...PLATTE...LAKE ANDES...MARTY... ARMOUR...CORSICA...DELMONT 405 PM CDT SUN APR 21 2013 ...WINTER WEATHER ADVISORY IN EFFECT FROM 5 AM TO 7 PM CDT MONDAY... THE NATIONAL WEATHER SERVICE IN SIOUX FALLS HAS ISSUED A WINTER WEATHER ADVISORY FOR SNOW...WHICH IS IN EFFECT FROM 5 AM TO 7 PM CDT MONDAY. * TIMING...SNOW WILL SPREAD INTO SOUTH CENTRAL SOUTH DAKOTA LATE TONIGHT AND CONTINUE THROUGH THE DAY MONDAY. SNOW MAY BECOME HEAVY AT TIMES...ESPECIALLY THROUGH THE MORNING HOURS MONDAY WHEN THE BULK OF THE SNOW ACCUMULATION IS LIKELY. * ACCUMULATIONS...SNOWFALL ACCUMULATIONS SHOULD AVERAGE 3 TO 5 INCHES ACROSS THE AREA. HOWEVER...LOCALIZED HEAVY BANDS OF SNOW MAY RESULT IN LARGE VARIANCES IN ACCUMULATION OVER SHORT DISTANCES. * WIND AND VISIBILITY...NORTH WINDS OF 15 TO 25 MPH ARE EXPECTED...WITH THE STRONGEST WINDS IN THE LATE MORNING AND AFTERNOON. VISIBILITY WILL GENERALLY BE AROUND A MILE OR MORE. HOWEVER...LOWER VISIBILITY OF A HALF MILE OR LESS SHOULD BE ANTICIPATED WITHIN HEAVIER BANDS OF SNOW. 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. && $$
6 follow-up statements
631 WWUS43 KFSD 220208 WSWFSD URGENT - WINTER WEATHER MESSAGE NATIONAL WEATHER SERVICE SIOUX FALLS SD 908 PM CDT SUN APR 21 2013 SDZ050-052-057>059-063-064-221015- /O.CON.KFSD.WW.Y.0021.130422T1000Z-130423T0000Z/ GREGORY-JERAULD-BRULE-AURORA-DAVISON-CHARLES MIX-DOUGLAS- INCLUDING THE CITIES OF...GREGORY...BURKE...WESSINGTON SPRINGS... ALPENA...CHAMBERLAIN...KIMBALL...PLANKINTON...WHITE LAKE... STICKNEY...MITCHELL...WAGNER...PLATTE...LAKE ANDES...MARTY... ARMOUR...CORSICA...DELMONT 908 PM CDT SUN APR 21 2013 ...WINTER WEATHER ADVISORY REMAINS IN EFFECT FROM 5 AM TO 7 PM CDT MONDAY... * TIMING...SNOW WILL SPREAD INTO SOUTH CENTRAL SOUTH DAKOTA LATE TONIGHT AND CONTINUE THROUGH THE DAY MONDAY. SNOW MAY BECOME HEAVY AT TIMES...ESPECIALLY THROUGH THE MORNING HOURS MONDAY WHEN THE BULK OF THE SNOW ACCUMULATION IS LIKELY. * ACCUMULATIONS...SNOWFALL ACCUMULATIONS SHOULD AVERAGE 3 TO 5 INCHES ACROSS THE AREA. HOWEVER...LOCALIZED HEAVY BANDS OF SNOW MAY RESULT IN LARGE VARIANCES IN ACCUMULATION OVER SHORT DISTANCES. * WIND AND VISIBILITY...NORTH WINDS OF 15 TO 25 MPH ARE EXPECTED...WITH THE STRONGEST WINDS IN THE LATE MORNING AND AFTERNOON. VISIBILITY WILL GENERALLY BE AROUND A MILE OR MORE. HOWEVER...LOWER VISIBILITY OF A HALF MILE OR LESS SHOULD BE ANTICIPATED WITHIN HEAVIER BANDS OF SNOW. PRECAUTIONARY/PREPAREDNESS ACTIONS... A WINTER WEATHER ADVISORY FOR SNOW MEANS THAT PERIODS OF SNOW WILL CAUSE PRIMARILY TRAVEL DIFFICULTIES. BE PREPARED FOR SNOW COVERED ROADS AND LIMITED VISIBILITIES...AND USE CAUTION WHILE DRIVING. && $$
215 WWUS43 KFSD 220754 WSWFSD URGENT - WINTER WEATHER MESSAGE NATIONAL WEATHER SERVICE SIOUX FALLS SD 254 AM CDT MON APR 22 2013 SDZ038-039-053>055-060-061-065-068-221600- /O.EXB.KFSD.WW.Y.0021.130422T1200Z-130423T0000Z/ BEADLE-KINGSBURY-SANBORN-MINER-LAKE-HANSON-MCCOOK-HUTCHINSON- BON HOMME- INCLUDING THE CITIES OF...HURON...DE SMET...ARLINGTON... LAKE PRESTON...WOONSOCKET...HOWARD...MADISON...ALEXANDRIA... EMERY...SALEM...CANISTOTA...BRIDGEWATER...MONTROSE...PARKSTON... FREEMAN...MENNO...TRIPP...TYNDALL...SCOTLAND...SPRINGFIELD... AVON...TABOR 254 AM CDT MON APR 22 2013 ...WINTER WEATHER ADVISORY IN EFFECT FROM 7 AM THIS MORNING TO 7 PM CDT THIS EVENING... THE NATIONAL WEATHER SERVICE IN SIOUX FALLS HAS ISSUED A WINTER WEATHER ADVISORY FOR SNOW...WHICH IS IN EFFECT FROM 7 AM THIS MORNING TO 7 PM CDT THIS EVENING. * TIMING...SNOW WILL SPREAD ACROSS THE AREA THIS MORNING AND CONTINUE INTO THE AFTERNOON...AND THEN END THIS EVENING. * ACCUMULATIONS...SNOWFALL ACCUMULATIONS SHOULD AVERAGE 4 TO 6 INCHES ACROSS THE AREA. HOWEVER...LOCALIZED HEAVY BANDS OF SNOW MAY RESULT IN LARGE VARIANCES IN ACCUMULATION OVER SHORT DISTANCES. * WIND AND VISIBILITY...NORTH WINDS WILL INCREASE TO 15 TO 25 MPH. THE WIND ALONG WITH THE SNOW WILL CREATE REDUCED VISIBILITIES. 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. && $$ MNZ071-097-098-SDZ040-056-062-066-067-069-221600- /O.EXB.KFSD.WW.Y.0021.130422T1500Z-130423T0300Z/ LINCOLN-PIPESTONE-ROCK-BROOKINGS-MOODY-MINNEHAHA-TURNER-YANKTON- INCLUDING THE CITIES OF...TYLER...HENDRICKS...LAKE BENTON... IVANHOE...PIPESTONE...LUVERNE...BROOKINGS...FLANDREAU... SIOUX FALLS...PARKER...CENTERVILLE...MARION...VIBORG...HURLEY... CHANCELLOR...CANTON...LENNOX...TEA...HARRISBURG...YANKTON 254 AM CDT MON APR 22 2013 ...WINTER WEATHER ADVISORY IN EFFECT FROM 10 AM THIS MORNING TO 10 PM CDT THIS EVENING... THE NATIONAL WEATHER SERVICE IN SIOUX FALLS HAS ISSUED A WINTER WEATHER ADVISORY FOR SNOW...WHICH IS IN EFFECT FROM 10 AM THIS MORNING TO 10 PM CDT THIS EVENING. * TIMING...SNOW WILL SPREAD ACROSS THE AREA THIS MORNING AND CONTINUE INTO THE AFTERNOON...AND THEN END LATE THIS EVENING. THERE MAY BE A MIXTURE OF RAIN AND SNOW THROUGH MID MORNING IN THE SIOUX FALLS AREA. * ACCUMULATIONS...SNOWFALL ACCUMULATIONS SHOULD AVERAGE 4 TO 6 INCHES ACROSS THE AREA. HOWEVER...LOCALIZED HEAVY BANDS OF SNOW MAY RESULT IN LARGE VARIANCES IN ACCUMULATION OVER SHORT DISTANCES. * WIND AND VISIBILITY...NORTH WINDS WILL INCREASE TO 15 TO 25 MPH. THE WIND ALONG WITH THE SNOW WILL CREATE REDUCED VISIBILITIES...ESPECIALLY DURING THE AFTERNOON AND EVENING HOURS. PRECAUTIONARY/PREPAREDNESS ACTIONS... A WINTER WEATHER ADVISORY FOR SNOW MEANS THAT PERIODS OF SNOW WILL CAUSE PRIMARILY TRAVEL DIFFICULTIES. BE PREPARED FOR SNOW COVERED ROADS AND LIMITED VISIBILITIES...AND USE CAUTION WHILE DRIVING. && $$ IAZ002-003-013-MNZ081-090-221600- /O.EXB.KFSD.WW.Y.0021.130422T1800Z-130423T0600Z/ OSCEOLA-DICKINSON-OBRIEN-COTTONWOOD-JACKSON- INCLUDING THE CITIES OF...SIBLEY...SPIRIT LAKE...MILFORD... ARNOLDS PARK...SHELDON...HARTLEY...SANBORN...WINDOM... MOUNTAIN LAKE...JACKSON...LAKEFIELD 254 AM CDT MON APR 22 2013 ...WINTER WEATHER ADVISORY IN EFFECT FROM 1 PM THIS AFTERNOON TO 1 AM CDT TUESDAY... THE NATIONAL WEATHER SERVICE IN SIOUX FALLS HAS ISSUED A WINTER WEATHER ADVISORY FOR SNOW...WHICH IS IN EFFECT FROM 1 PM THIS AFTERNOON TO 1 AM CDT TUESDAY. * TIMING...A MIXTURE OF RAIN AND SNOW WILL DEVELOP ACROSS THE AREA THIS MORNING AND CHANGE COMPLETELY OVER TO SNOW THIS AFTERNOON. THE SNOW WILL CONTINUE THROUGH THE EVENING BEFORE ENDING AFTER MIDNIGHT. * ACCUMULATIONS...SNOWFALL ACCUMULATIONS SHOULD AVERAGE 4 TO 6 INCHES ACROSS THE AREA. HOWEVER...LOCALIZED HEAVY BANDS OF SNOW MAY RESULT IN LARGE VARIANCES IN ACCUMULATION OVER SHORT DISTANCES. * WIND AND VISIBILITY...NORTH WINDS WILL INCREASE TO 15 TO 25 MPH DURING THE DAY. THE WIND ALONG WITH THE SNOW WILL CREATE REDUCED VISIBILITIES DURING THE AFTERNOON AND EVENING HOURS. 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. && $$ IAZ001-012-MNZ072-080-089-SDZ070-071-221600- /O.EXB.KFSD.WW.Y.0021.130422T1800Z-130423T0300Z/ LYON-SIOUX-MURRAY-NOBLES-CLAY-UNION- INCLUDING THE CITIES OF...ROCK RAPIDS...GEORGE...INWOOD... LARCHWOOD...ORANGE CITY...SIOUX CENTER...MARSHALL...SLAYTON... FULDA...WORTHINGTON...VERMILLION...NORTH SIOUX CITY...BERESFORD... ELK POINT...ALCESTER...JEFFERSON 254 AM CDT MON APR 22 2013 ...WINTER WEATHER ADVISORY IN EFFECT FROM 1 PM THIS AFTERNOON TO 10 PM CDT THIS EVENING... THE NATIONAL WEATHER SERVICE IN SIOUX FALLS HAS ISSUED A WINTER WEATHER ADVISORY FOR SNOW...WHICH IS IN EFFECT FROM 1 PM THIS AFTERNOON TO 10 PM CDT THIS EVENING. * TIMING...RAIN WILL DEVELOP ACROSS THE AREA THIS MORNING AND CHANGE OVER TO SNOW IN THE AFTERNOON. THE SNOW WILL CONTINUE DURING THE EVENING AND THEN END AFTER MIDNIGHT. * ACCUMULATIONS...SNOWFALL ACCUMULATIONS SHOULD AVERAGE 2 TO 4 INCHES ACROSS THE AREA. HOWEVER...LOCALIZED HEAVY BANDS OF SNOW MAY RESULT IN LARGE VARIANCES IN ACCUMULATION OVER SHORT DISTANCES. * WIND AND VISIBILITY...NORTH WINDS WILL INCREASE TO 15 TO 25 MPH DURING THE DAY. THE WIND ALONG WITH THE SNOW WILL CREATE REDUCED VISIBILITIES DURING THE AFTERNOON AND EVENING HOURS. PRECAUTIONARY/PREPAREDNESS ACTIONS... A WINTER WEATHER ADVISORY FOR SNOW MEANS THAT PERIODS OF SNOW WILL CAUSE PRIMARILY TRAVEL DIFFICULTIES. BE PREPARED FOR SNOW COVERED ROADS AND LIMITED VISIBILITIES...AND USE CAUTION WHILE DRIVING. && $$ SDZ050-052-057>059-063-064-221600- /O.CON.KFSD.WW.Y.0021.130422T1000Z-130423T0000Z/ GREGORY-JERAULD-BRULE-AURORA-DAVISON-CHARLES MIX-DOUGLAS- INCLUDING THE CITIES OF...GREGORY...BURKE...WESSINGTON SPRINGS... ALPENA...CHAMBERLAIN...KIMBALL...PLANKINTON...WHITE LAKE... STICKNEY...MITCHELL...WAGNER...PLATTE...LAKE ANDES...MARTY... ARMOUR...CORSICA...DELMONT 254 AM CDT MON APR 22 2013 ...WINTER WEATHER ADVISORY REMAINS IN EFFECT UNTIL 7 PM CDT THIS EVENING... * TIMING...SNOW WILL SPREAD ACROSS THE AREA EARLY THIS MORNING AND PERSIST THROUGH THE AFTERNOON. * ACCUMULATIONS...SNOWFALL ACCUMULATIONS SHOULD AVERAGE 4 TO 6 INCHES ACROSS THE AREA. HOWEVER...LOCALIZED HEAVY BANDS OF SNOW MAY RESULT IN LARGE VARIANCES IN ACCUMULATION OVER SHORT DISTANCES. * WIND AND VISIBILITY...NORTH WINDS OF 15 TO 25 MPH ARE EXPECTED TODAY. THE WIND ALONG WITH THE SNOW WILL CREATE REDUCED VISIBILITIES THROUGH THE DAY. 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. && $$
044 WWUS43 KFSD 222209 WSWFSD URGENT - WINTER WEATHER MESSAGE NATIONAL WEATHER SERVICE SIOUX FALLS SD 509 PM CDT MON APR 22 2013 SDZ038-039-050-052>055-057>061-063>065-068-222315- /O.CAN.KFSD.WW.Y.0021.000000T0000Z-130423T0000Z/ BEADLE-KINGSBURY-GREGORY-JERAULD-SANBORN-MINER-LAKE-BRULE-AURORA- DAVISON-HANSON-MCCOOK-CHARLES MIX-DOUGLAS-HUTCHINSON-BON HOMME- INCLUDING THE CITIES OF...HURON...DE SMET...ARLINGTON... LAKE PRESTON...GREGORY...BURKE...WESSINGTON SPRINGS...ALPENA... WOONSOCKET...HOWARD...MADISON...CHAMBERLAIN...KIMBALL... PLANKINTON...WHITE LAKE...STICKNEY...MITCHELL...ALEXANDRIA... EMERY...SALEM...CANISTOTA...BRIDGEWATER...MONTROSE...WAGNER... PLATTE...LAKE ANDES...MARTY...ARMOUR...CORSICA...DELMONT... PARKSTON...FREEMAN...MENNO...TRIPP...TYNDALL...SCOTLAND... SPRINGFIELD...AVON...TABOR 509 PM CDT MON APR 22 2013 ...WINTER WEATHER ADVISORY IS CANCELLED... THE NATIONAL WEATHER SERVICE IN SIOUX FALLS HAS CANCELLED THE WINTER WEATHER ADVISORY. SNOW HAS ENDED OR DECREASED TO FLURRIES...AND NO ADDITIONAL ACCUMULATION IS EXPECTED. WATER AND SLUSH FROM THE SNOWFALL WILL FREEZE THIS EVENING AS TEMPERATURES SLOWLY FALL AND THIS MAY CREATE SOME ICY AREAS. $$ IAZ001-012-MNZ071-072-080-089-097-098-SDZ040-056-062-066-067- 069>071-230300- /O.CON.KFSD.WW.Y.0021.000000T0000Z-130423T0300Z/ LYON-SIOUX-LINCOLN-MURRAY-NOBLES-PIPESTONE-ROCK-BROOKINGS-MOODY- MINNEHAHA-TURNER-YANKTON-CLAY-UNION- INCLUDING THE CITIES OF...ROCK RAPIDS...GEORGE...INWOOD... LARCHWOOD...ORANGE CITY...SIOUX CENTER...TYLER...HENDRICKS... LAKE BENTON...IVANHOE...MARSHALL...SLAYTON...FULDA... WORTHINGTON...PIPESTONE...LUVERNE...BROOKINGS...FLANDREAU... SIOUX FALLS...PARKER...CENTERVILLE...MARION...VIBORG...HURLEY... CHANCELLOR...CANTON...LENNOX...TEA...HARRISBURG...YANKTON... VERMILLION...NORTH SIOUX CITY...BERESFORD...ELK POINT... ALCESTER...JEFFERSON 509 PM CDT MON APR 22 2013 ...WINTER WEATHER ADVISORY REMAINS IN EFFECT UNTIL 10 PM CDT THIS EVENING... * TIMING...SNOW WILL CONTINUE INTO THE START OF THIS EVENING BUT INTENSITY WILL DECREASE STEADILY FROM THE WEST. SNOW SHOULD END THIS EVENING. * ACCUMULATIONS...ADDITIONAL ACCUMULATIONS OF ONE INCH OR LESS ARE EXPECTED. * WIND AND VISIBILITY...NORTH WINDS 15 TO 25 MPH WILL CONTINUE THIS EVENING BUT NO VISIBILITY RESTRICTION IS EXPECTED ONCE THE WET SNOWFALL ENDS. VISIBILITIES OF A MILE OR LESS WHILE THE SNOW FALLS WILL STEADILY IMPROVE EARLY THIS EVENING. 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. && $$ IAZ002-003-013-MNZ081-090-230600- /O.CON.KFSD.WW.Y.0021.000000T0000Z-130423T0600Z/ OSCEOLA-DICKINSON-OBRIEN-COTTONWOOD-JACKSON- INCLUDING THE CITIES OF...SIBLEY...SPIRIT LAKE...MILFORD... ARNOLDS PARK...SHELDON...HARTLEY...SANBORN...WINDOM... MOUNTAIN LAKE...JACKSON...LAKEFIELD 509 PM CDT MON APR 22 2013 ...WINTER WEATHER ADVISORY REMAINS IN EFFECT UNTIL 1 AM CDT TUESDAY... * TIMING...SNOW WILL CONTINUE EARLY THIS EVENING BUT SHOULD DECREASE FROM THE WEST AFTER DARK. * ACCUMULATIONS...ADDITIONAL ACCUMULATIONS OF 1 TO 3 INCHES ARE EXPECTED. * WIND AND VISIBILITY...NORTH WINDS 15 TO 25 MPH WILL CONTINUE. VISIBILITIES OF A HALF MILE OR LESS IN SOME AREAS IN FALLING SNOW SHOULD IMPROVE STEADILY AFTER SUNSET. THE WINDS WILL ADD AT MOST A SLIGHT ADDITIONAL VISIBILITY REDUCTION WHILE THE SNOW IS FALLING. PRECAUTIONARY/PREPAREDNESS ACTIONS... A WINTER WEATHER ADVISORY FOR SNOW MEANS THAT PERIODS OF SNOW WILL CAUSE PRIMARILY TRAVEL DIFFICULTIES. BE PREPARED FOR SNOW COVERED ROADS AND LIMITED VISIBILITIES...AND USE CAUTION WHILE DRIVING. && $$
169 WWUS43 KFSD 230004 WSWFSD URGENT - WINTER WEATHER MESSAGE NATIONAL WEATHER SERVICE SIOUX FALLS SD 704 PM CDT MON APR 22 2013 SDZ040-056-062-066-067-069>071-230115- /O.CAN.KFSD.WW.Y.0021.000000T0000Z-130423T0300Z/ BROOKINGS-MOODY-MINNEHAHA-TURNER-LINCOLN-YANKTON-CLAY-UNION- INCLUDING THE CITIES OF...BROOKINGS...FLANDREAU...SIOUX FALLS... PARKER...CENTERVILLE...MARION...VIBORG...HURLEY...CHANCELLOR... CANTON...LENNOX...TEA...HARRISBURG...YANKTON...VERMILLION... NORTH SIOUX CITY...BERESFORD...ELK POINT...ALCESTER...JEFFERSON 704 PM CDT MON APR 22 2013 ...WINTER WEATHER ADVISORY IS CANCELLED... THE NATIONAL WEATHER SERVICE IN SIOUX FALLS HAS CANCELLED THE WINTER WEATHER ADVISORY. SNOW HAS BECOME LIGHT AND WILL END EARLY THIS EVENING WITH LITTLE OR NO ADDITIONAL ACCUMULATION. WATER AND SLUSH FROM THE SNOWFALL WILL FREEZE THIS EVENING AS TEMPERATURES SLOWLY FALL AND THIS MAY CREATE SOME ICY AREAS. $$ IAZ001-012-MNZ071-072-080-089-097-098-230300- /O.CON.KFSD.WW.Y.0021.000000T0000Z-130423T0300Z/ LYON-SIOUX-LINCOLN-MURRAY-NOBLES-PIPESTONE-ROCK- INCLUDING THE CITIES OF...ROCK RAPIDS...GEORGE...INWOOD... LARCHWOOD...ORANGE CITY...SIOUX CENTER...TYLER...HENDRICKS... LAKE BENTON...IVANHOE...MARSHALL...SLAYTON...FULDA... WORTHINGTON...PIPESTONE...LUVERNE 704 PM CDT MON APR 22 2013 ...WINTER WEATHER ADVISORY REMAINS IN EFFECT UNTIL 10 PM CDT THIS EVENING... * TIMING...SNOW WAS CONTINUING INTO THE START OF THIS EVENING BUT WILL DECREASE STEADILY FROM THE WEST. SNOW SHOULD END LATE THIS EVENING. * ACCUMULATIONS...ADDITIONAL ACCUMULATIONS OF LESS THAN ONE INCH ARE EXPECTED. * WIND AND VISIBILITY...NORTH WINDS 15 TO 25 MPH WILL CONTINUE THIS EVENING BUT NO VISIBILITY RESTRICTION IS EXPECTED ONCE THE WET SNOWFALL ENDS. VISIBILITIES OF A MILE OR LESS WHILE THE SNOW FALLS WILL STEADILY IMPROVE EARLY THIS EVENING. PRECAUTIONARY/PREPAREDNESS ACTIONS... A WINTER WEATHER ADVISORY FOR SNOW MEANS THAT PERIODS OF SNOW WILL CAUSE PRIMARILY TRAVEL DIFFICULTIES. BE PREPARED FOR SNOW COVERED ROADS AND LIMITED VISIBILITIES...AND USE CAUTION WHILE DRIVING. && $$ IAZ002-003-013-MNZ081-090-230600- /O.CON.KFSD.WW.Y.0021.000000T0000Z-130423T0600Z/ OSCEOLA-DICKINSON-OBRIEN-COTTONWOOD-JACKSON- INCLUDING THE CITIES OF...SIBLEY...SPIRIT LAKE...MILFORD... ARNOLDS PARK...SHELDON...HARTLEY...SANBORN...WINDOM... MOUNTAIN LAKE...JACKSON...LAKEFIELD 704 PM CDT MON APR 22 2013 ...WINTER WEATHER ADVISORY REMAINS IN EFFECT UNTIL 1 AM CDT TUESDAY... * TIMING...SNOW WILL CONTINUE EARLY THIS EVENING BUT SHOULD DECREASE FROM THE WEST AFTER DARK. * ACCUMULATIONS...ADDITIONAL ACCUMULATIONS OF 1 TO 3 INCHES ARE EXPECTED. * WIND AND VISIBILITY...NORTH WINDS 15 TO 25 MPH WILL CONTINUE. VISIBILITIES OF A HALF MILE OR LESS IN SOME AREAS IN FALLING SNOW SHOULD IMPROVE STEADILY AFTER SUNSET. THE WINDS WILL ADD AT MOST A SLIGHT ADDITIONAL VISIBILITY REDUCTION WHILE THE SNOW IS FALLING. 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. && $$
787 WWUS43 KFSD 230143 WSWFSD URGENT - WINTER WEATHER MESSAGE NATIONAL WEATHER SERVICE SIOUX FALLS SD 843 PM CDT MON APR 22 2013 IAZ001-012-MNZ071-072-080-089-097-098-230245- /O.CAN.KFSD.WW.Y.0021.000000T0000Z-130423T0300Z/ LYON-SIOUX-LINCOLN-MURRAY-NOBLES-PIPESTONE-ROCK- INCLUDING THE CITIES OF...ROCK RAPIDS...GEORGE...INWOOD... LARCHWOOD...ORANGE CITY...SIOUX CENTER...TYLER...HENDRICKS... LAKE BENTON...IVANHOE...MARSHALL...SLAYTON...FULDA... WORTHINGTON...PIPESTONE...LUVERNE 843 PM CDT MON APR 22 2013 ...WINTER WEATHER ADVISORY IS CANCELLED... THE NATIONAL WEATHER SERVICE IN SIOUX FALLS HAS CANCELLED THE WINTER WEATHER ADVISORY. SNOW HAS ENDED OR DECREASED TO FLURRIES...AND NO ADDITIONAL ACCUMULATION IS EXPECTED. WATER AND SLUSH FROM THE SNOWFALL WILL FREEZE THIS EVENING AS TEMPERATURES SLOWLY FALL AND THIS MAY CREATE SOME ICY AREAS. $$ IAZ002-003-013-MNZ081-090-230600- /O.CON.KFSD.WW.Y.0021.000000T0000Z-130423T0600Z/ OSCEOLA-DICKINSON-OBRIEN-COTTONWOOD-JACKSON- INCLUDING THE CITIES OF...SIBLEY...SPIRIT LAKE...MILFORD... ARNOLDS PARK...SHELDON...HARTLEY...SANBORN...WINDOM... MOUNTAIN LAKE...JACKSON...LAKEFIELD 843 PM CDT MON APR 22 2013 ...WINTER WEATHER ADVISORY REMAINS IN EFFECT UNTIL 1 AM CDT TUESDAY... * TIMING...SNOW WAS DECREASING THIS EVENING...BUT A SEPARATE AREA OF LIGHT SNOW IS EXPECTED TO MOVE ACROSS THE AREA. * ACCUMULATIONS...ADDITIONAL ACCUMULATIONS OF LESS THAN ONE INCH. * WIND AND VISIBILITY...NORTH WINDS 15 TO 25 MPH WILL CONTINUE BUT WILL CAUSE LITTLE OR NO ADDITIONAL VISIBILITY REDUCTION...ASIDE FROM VISIBILITIES AROUND 1 MILE DUE TO FALLING SNOW. 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. && $$
034 WWUS43 KFSD 230300 WSWFSD URGENT - WINTER WEATHER MESSAGE NATIONAL WEATHER SERVICE SIOUX FALLS SD 1000 PM CDT MON APR 22 2013 IAZ002-003-013-MNZ081-090-230400- /O.CAN.KFSD.WW.Y.0021.000000T0000Z-130423T0600Z/ OSCEOLA-DICKINSON-OBRIEN-COTTONWOOD-JACKSON- INCLUDING THE CITIES OF...SIBLEY...SPIRIT LAKE...MILFORD... ARNOLDS PARK...SHELDON...HARTLEY...SANBORN...WINDOM... MOUNTAIN LAKE...JACKSON...LAKEFIELD 1000 PM CDT MON APR 22 2013 ...WINTER WEATHER ADVISORY IS CANCELLED... THE NATIONAL WEATHER SERVICE IN SIOUX FALLS HAS CANCELLED THE WINTER WEATHER ADVISORY. SNOW HAD BECOME LIGHT THIS EVENING AND IS EXPECTED TO END BY MIDNIGHT WITH LITTLE OR NO ADDITIONAL ACCUMULATION. NORTHERLY WINDS GUSTING TO OVER 25 MPH ARE NOT EXPECTED TO CAUSE ANY ISIBILITY REDUCTION...AND SHOULD RESULT IN AT MOST MINOR LOW LEVEL DRIFTING. HOWEVER...WATER AND SLUSH FROM THE SNOWFALL WILL FREEZE TONIGHT AS TEMPERATURES SLOWLY FALL AND THIS MAY CREATE SOME ICY AREAS. $$
What forecasters said that day
The local office's own words before this winter weather advisory 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 winter weather advisory went out at Apr 21, 11:54 AM CDT, 4 hours 11 minutes earlier.
Area forecast discussion, Apr 21, 11:54 AM CDT, 4 hours 11 minutes before
AREA FORECAST DISCUSSION NATIONAL WEATHER SERVICE SIOUX FALLS SD 1154 AM CDT SUN APR 21 2013 .UPDATE... ISSUED AT 1128 AM CDT SUN APR 21 2013 LINE OF SHOWERS HAS DEVELOPED AHEAD OF A COLD FRONT IN THE JAMES RIVER VALLEY LATE THIS MORNING. THESE SHOWERS WILL CONTINUE TO TRACK EASTWARD THROUGH THE EVENING HOURS AS THE FRONT SWEEPS THROUGH THE FORECAST AREA. PARTLY CLOUDY SKIES AND SOUTHERLY FLOW WELL AHEAD OF THE FRONT THIS MORNING HAS ALLOWED TEMPERATURES TO WARM NICELY...ESPECIALLY IN NORTHWEST IOWA AND FAR SOUTHEAST SOUTH DAKOTA WHERE READINGS ARE NEAR 50 OR JUST ABOVE. SHOULD SEE THE LOW 60S REALIZED IN PARTS OF NORTHWEST IOWA TODAY...WITH THE FRONTAL SHOWERS HOLDING OFF LONGEST. HOWEVER...WITH SHOWERS AND OVERCAST SKIES ADVANCING THROUGH THE AREA...HOURLY TEMPERATURES WILL BE A BIT DIFFICULT TO PINPOINT WITH COOLING ACCOMPANYING THE PRECIPITATION. FORECAST SOUNDINGS SUGGEST ENOUGH WEAK INSTABILITY/INCREASE LAPSE RATES FOR SOME ISOLATED THUNDERSTORMS TO ALSO DEVELOP...MAINLY IN NORTHWEST IOWA AND ADJACENT COUNTIES THIS AFTERNOON AND EVENING. BEHIND THE FRONT...BEHIND THIS BAND OF SHOWERS AND THUNDERSTORMS...DRIER CONDITIONS ARRIVE WITH THE FRONT SO IT APPEARS THAT ONCE THE SHOWERS MOVE THROUGH THE AREA...PRECIPITATION WILL LIKELY BE OVER FOR THE BULK OF THE NIGHT. UPDATES ARE OUT...MAINLY FOR TIMING THE BAND OF SHOWERS THROUGH THE FORECAST AREA. && .SHORT TERM...(TODAY THROUGH TUESDAY NIGHT) ISSUED AT 440 AM CDT SUN APR 21 2013 ACTIVE WEATHER PATTERN OVER THE NEXT COUPLE DAYS AS TROUGHING BUILDS OVER THE REGION..ONE WAVE WILL IMPACT THE AREA TODAY AND ANOTHER ONE MONDAY. TODAYS WAVE IS A BIT WEAKER...BUT ACCOMPANIED BY A DECENT LOW AND MID LEVEL FRONTAL BOUNDARY. LIFT FROM THESE TWO WILL ALLOW FOR SHOWERS TO MOVE ACROSS THE AREA. HI RES MODELS IN GOOD AGREEMENT AND FOLLOWED CLOSE TO THEM FOR TIMING. THE SHOWER THREAT SHOULD ENTER AREAS WEST OF THE JAMES RIVER AFTER 12Z...APPROACH INTERSTATE 29 BY 18Z AND THE EASTERN EDGE OF THE CWA BY 21Z. BEST LARGE SCALE LIFT AND MORE SATURATED LOW LEVELS WILL BE ALONG AND NORTH OF INTERSTATE 90...THUS EXPECT GREATEST SHOWER COVERAGE TO BE THERE. SOME WEAK INSTABILITY...WITH CAPES UP TO 500 J/KG...SHOULD DEVELOP BY THIS AFTERNOON ACROSS NORTHWEST IOWA. THUS THINKING IS THAT AREA OF SHOWERS BUILDS SOUTH ALONG THE COLD FRONT INTO NORTHWEST IOWA LATER THIS AFTERNOON INTO THIS EVENING. IT IS THIS AREA....FROM SIOUX FALLS AND POINTS SOUTHEAST...THAT COULD SEE A FEW THUNDERSTORMS EMBEDDED IN THE SHOWERS. THIS AREA OF SHOWERS SHOULD PUSH SOUTHEAST OF OUR AREA BY 03Z. THE HOURS OF 03Z TO 09Z MAY VERY WELL BE DRY OVER MOST IF NOT ALL OF THE CWA. DESPITE THE COPIOUS AMOUNT OF CLOUDS...TEMPERATURES TODAY SHOULD STILL RISE NICELY OUT AHEAD OF THE FRONT WITH DECENT MIXING AND A FEW BREAKS OF SUN YIELDING 50S IN AREAS OF LITTLE OR NO SNOW COVER...AND EVEN SOME LOW TO MID 60S POSSIBLE NEAR SIOUX CITY AND SURROUNDING AREAS. IT IS LATER TONIGHT INTO MONDAY THAT WAVE NUMBER TWO WILL INTERACT WITH THE MID LEVEL FRONTAL BOUNDARY OVERHEAD AND BRING ANOTHER ROUND OF PRECIPITATION TO THE AREA. BETTER LARGE SCALE FORCING EXPECTED WITH THIS WAVE...WITH OUR REGION IN THE LEFT EXIT OF ONE JET STREAK ACROSS THE CENTRAL PLAINS...AND THE RIGHT ENTRANCE OF ONE NEAR THE CANADIAN BORDER. ALSO SEEING DECENT FRONTOGENESIS ALONG THE MID LEVEL BOUNDARY OVERHEAD...WITH DECENT LAPSE RATES AND SOME SIGNS OF NEGATIVE EPV ABOVE THE FRONT. THUS THINKING IS WE SEE A SWATH OF MODERATE TO BRIEFLY HEAVY PRECIPITATION MOVE THROUGH THE AREA. THE WAVE IS FAIRLY PROGRESSIVE...WHICH WILL HELP PREVENT QPF AMOUNTS FROM GETTING TOO HIGH. AS FOR TIMING...MODELS IN DECENT AGREEMENT...AND EXPECT PRECIPITATION TO BEGIN WEST OF THE JAMES RIVER BY AROUND 09Z...INTERSTATE 29 CORRIDOR BY SHORTLY AFTER 12Z...AND REACHING SOUTHWEST MINNESOTA BY AROUND 15Z. PRECIPITATION TYPE WILL BE MAINLY SNOW ACROSS THE NORTHWEST HALF OF THE CWA...WHICH WILL BE LOCATED ON THE COLD SIDE OF THE FRONTAL BOUNDARY. EXPECT AREAS RIGHT THROUGH THE CENTER OF THE CWA...FROM YANKTON TO SIOUX FALLS TO WINDOM...TO BEGIN AS RAIN...BUT QUICKLY CHANGE OVER TO SNOW AS COLD AIR ALOFT RUSHES IN. NORTHWEST IOWA WILL BE PREDOMINATELY RAIN...BUT EVEN THESE LOCATIONS SHOULD END AS SNOW ON THE BACKSIDE OF THE WAVE. AS FAR AS AMOUNTS GO...CURRENTLY LOOKING AT A SWATH OF 2 TO 4 INCHES ACROSS A GOOD PORTION OF THE CWA...ONLY EXCLUDING NORTHWEST IOWA...WHERE UP TO AN INCH OR TWO IS POSSIBLE. THE QUICK PROGRESSION OF THE WAVE SHOULD PREVENT HIGHER AMOUNTS. ALTHOUGH DUE TO THE STRONG FRONTAL ZONE AND LOW STABILITY...THINK SOME HEAVIER CONVECTIVE BURSTS OF SNOW ARE POSSIBLE...THUS ISOLATED AMOUNTS OF 5 OR MAYBE 6 INCHES ARE POSSIBLE WITHIN THE 2 TO 4 INCH SWATH. EXACTLY WHERE AND IF THIS HAPPENS WILL BE TOUGH TO TELL UNTIL THE EVENT IS UNDERWAY. WILL HAVE TO CONTINUE TO MONITOR MODEL TRENDS. AS WHILE MODELS HAVE BEEN CONSISTENT WITH THE SNOW SWATH WITH REGARDS TO POSITIONING AND INTENSITY...THINGS CAN CHANGE. FOR EXAMPLE THE GEM IS FURTHER SOUTH WITH THE WAVE AND THUS GIVES THE AREA LESS QPF AND LESS SNOW. WHILE THIS SEEMS LIKE AN OUTLIER SOLUTION AND LOWER PROBABILITY EVENT...WILL STILL HAVE TO MONITOR WHERE EXACTLY THE MID LEVEL FRONT STALLS AND THIS 2ND WAVE ENDS UP TRACKING. WINDS WILL BE BREEZY OUT OF THE NORTH ON MONDAY DURING THE SNOW...GUSTING TO AROUND 30 MPH. THESE WINDS MAY HELP EXACERBATE THE PROBLEM OF LOW VISIBILITIES DURING THE BRIEF PERIODS OF HEAVIER SNOW...ALTHOUGH GIVEN THE WET NATURE OF THE SNOW...BLOWING AND DRIFTING SHOULD NOT BE A BIG ISSUE. THINK MOST OF THE ACCUMULATION WILL OCCUR ON GRASSY SURFACES...WITH MARGINAL TEMPERATURES AND IT FALLING DURING DAYLIGHT. HOWEVER SOME ACCUMULATION ON ROADS WILL BE POSSIBLE...ESPECIALLY IF WE CAN GET SOME HEAVIER BURSTS OF NEAR AN INCH AN HOUR SNOW. THE SNOW WILL ABATE FROM WEST TO EAST MONDAY AFTERNOON AND EVENING...ENDING WHAT MAY BE...AND MOST PEOPLE PROBABLY HOPE TO BE...OUR LAST ACCUMULATING SNOW OF THE SEASON. THIS WILL GIVE WAY TO DECREASING CLOUDS MONDAY NIGHT AND LOWS IN THE 20S. TUESDAY WILL BE A COLD DAY...WITH 850MB TEMPERATURES APPROACHING -10C...ABOUT AS COLD AS WE CAN GET THIS TIME OF YEAR. THIS COMBINED WITH THE LIKELIHOOD OF A COUPLE INCHES OF SNOWPACK...SHOULD KEEP HIGHS IN THE MID 30S TO LOW 40S MOST LOCATIONS...ABOUT 25 DEGREES BELOW NORMAL. WE SHOULD SEE AT LEAST SOME SUN THOUGH...WITH PARTLY TO MOSTLY SUNNY SKIES EXPECTED. .LONG TERM...(WEDNESDAY THROUGH SATURDAY) ISSUED AT 440 AM CDT SUN APR 21 2013 ANOTHER SHORT WAVE WILL DROP SOUTHEAST ACROSS THE NORTHERN PLAINS ON WEDNESDAY. ASSOCIATED COLD FRONT WILL MOVE ACROSS CWA DURING THE DAY...REACHING FAR SOUTHEAST CWA BY 00Z. HIGH TEMPERATURES ACROSS THE NORTHERN CWA WILL LIKELY BE AROUND NOON AND THEN FALL AS STRONGER COLD AIR ADVECTION MOVES IN. WILL GO SLIGHTLY LOWER ON MAX TEMPERATURES ACROSS THE NORTH...WHILE BETTER MIXING ACROSS THE SOUTH SHOULD ALLOW TEMPERATURES TO REACH THE LOWER TO MID 50S. COULD ALSO BE A FEW SHOWERS WITH THE WAVE DURING THE AFTERNOON...WITH A RAIN/SOW MIX POSSIBLE ACROSS THE NORTH. SURFACE HIGH WILL SETTLE ACROSS CWA WEDNESDAY NIGHT WITH CLEARING EXPECTED. THIS SHOULD ALLOW FOR LOWS TO DROP INTO THE 20S. WARM AIR ADVECTION AS WARM FRONT LIFTS NORTH TO NEAR I90 BY AFTERNOON. HIGH TEMPERATURES WILL VARY FROM THE 40S ACROSS THE FAR NORTHEAST CWA TO NEAR 60 ALONG THE MISSOURI RIVER. THIS FRONT WILL LIFT NORTH OF THE CWA FRIDAY THROUGH SATURDAY...ALLOWING FOR A WEEKEND WHERE TEMPERATURES WILL ACTUALLY BE NEAR OR A LITTLE ABOVE NORMAL. WILL KEEP SLIGHT CHANCE OF SHOWERS FRIDAY WITH WEAK WAVE...BUT MORE LIKELY THAN NOT IT WILL BE DRY THURSDAY INTO THE WEEKEND. && .AVIATION...(FOR THE 18Z TAFS THROUGH 18Z MONDAY AFTERNOON) ISSUED AT 1128 AM CDT SUN APR 21 2013 BAND OF SHOWERS IN THE JAMES VALLEY AHEAD OF AN APPROACHING COLD FRONT WILL TRACK EAST SOUTHEAST THROUGH THE FORECAST AREA THROUGH THE LATE EVENING HOURS. COULD SEE ENOUGH ENHANCEMENT THIS AFTERNOON AND EVENING FOR SOME ISOLATED THUNDERSTORMS MAINLY FOR NORTHWEST IOWA AND FAR SOUTHEAST SOUTH DAKOTA...INCLUDING KSUX AND KFSD FROM 19 TO MONDAY 03Z. BRIEF DROPS TO MVFR CEILINGS AND VISIBILITY POSSIBLE IN THE HEAVIER SHOWERS. LOW STRATUS IS EXPECTED TO START WORKING INTO THE AREA BEHIND THE FRONT TONIGHT. THE NEXT ROUND OF PRECIPITATION WILL ALSO START SPREADING INTO THE MISSOURI VALLEY LATE TONIGHT...BECOMING WIDESPREAD BY THE END OF THE TAF PERIOD. A MIX OF PRECIPITATION TYPES ARE EXPECTED....WITH SNOW IN THE WEST AND A MIX OF RAIN AND SNOW EAST. && .FSD WATCHES/WARNINGS/ADVISORIES... SD...NONE. MN...NONE. IA...NONE. NE...NONE. && UPDATE... SHORT TERM...CHENARD LONG TERM... AVIATION...
Hazardous weather outlook, Apr 21, 5:17 AM CDT, 10 hours 48 minutes before
HAZARDOUS WEATHER OUTLOOK NATIONAL WEATHER SERVICE SIOUX FALLS SD 517 AM CDT SUN APR 21 2013 SDZ038>040-050-052>071-MNZ071-072-080-081-089-090-097-098- IAZ001>003-012>014-020>022-031-032-NEZ013-014-221200- 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- 517 AM CDT SUN APR 21 2013 THIS HAZARDOUS WEATHER OUTLOOK IS FOR SOUTHEAST SOUTH DAKOTA... SOUTHWEST MINNESOTA...NORTHWEST IOWA...AND NORTHEAST NEBRASKA. .DAY ONE...TODAY AND TONIGHT THUNDERSTORMS... A FEW THUNDERSTORMS EMBEDDED IN TODAYS RAIN SHOWERS ARE POSSIBLE. THE BEST CHANCE WILL BE FROM SIOUX FALLS AND POINTS SOUTHEAST INTO NORTHWEST IOWA...ANYTIME AFTER NOON TODAY. WINTER WEATHER... AN AREA OF RAIN AND SNOW WILL MOVE BACK INTO THE AREAS ALONG AND WEST OF THE JAMES RIVER AFTER MIDNIGHT TONIGHT. THROUGH TONIGHT...SNOWFALL AMOUNTS SHOULD GENERALLY ONLY BE UP TO AN INCH OR TWO IN THIS AREA. .DAYS TWO THROUGH SEVEN...MONDAY THROUGH SATURDAY A WAVE WILL MOVE ALONG THE FRONT LATE SUNDAY NIGHT INTO MONDAY. A RAIN AND SNOW MIX SHOULD GIVE WAY TO A PERIOD OF ACCUMULATING SNOW MONDAY. A GOOD PORTION OF THE AREA SHOULD SEE 2 TO 4 INCHES OF SNOW. ISOLATED HIGHER AMOUNTS ARE POSSIBLE. LIGHTER AMOUNTS ARE EXPECTED ACROSS PORTIONS OF NORTHWEST IOWA...WHERE A LONGER PERIOD OF RAIN IS EXPECTED. THE SNOW MAY BE BRIEFLY HEAVY...WITH VISIBILITIES REDUCED TO A HALF MILE OR LESS AT TIMES. MOST OF THE ACCUMULATION WILL BE ON GRASSY SURFACES...ALTHOUGH DURING ANY HEAVIER BURSTS...THE SNOW WILL LIKELY STICK TO ROADS...LEADING TO SOME SLICK SPOTS. STAY TUNED TO FUTURE UPDATES...AS THE EXACT AREA THAT SEES THE SWATH OF SNOW IS STILL A BIT UNCERTAIN. .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.
Nearby
Winter Weather Advisories in South Dakota, 2013Winter Weather Advisories in Minnesota, 2013Winter Weather Advisories in Iowa, 2013Every winter weather advisory in 2013
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.