Alert archive / Iowa / Winter Storm Warnings in 2013
Winter Storm Warning 1, NWS Sioux Falls, SD
NWS Sioux Falls, SD issued this winter storm warning at Feb 21, 2013, 7:24 PM CST for 5 counties in Iowa; Dakota County, Dixon County, Nebraska. It was in force for 14 hr. 25 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 21, 2013, 7:24 PM CST (01:24 UTC)
- Expired
- Feb 22, 2013, 9:00 AM CST
- In force
- 14 hr
- Issued by
- NWS Sioux Falls, SD
Counties Buena Vista County, IA, Cherokee County, IA, Ida County, IA, Plymouth County, IA, Woodbury County, IA, Dakota County, NE, Dixon County, NE
The radar
The Sioux Falls radar (KFSD), 130 km from the middle of the area, began a volume at 01:28 UTC, the scan nearest the moment this went out.
Open the radar archive at this moment
The archived warnings, watches and discussions in force at that minute are drawn over the scan, this one among them.
What was reported inside it
| Time | Report | Where | Remark |
|---|---|---|---|
| Feb 21, 8:50 PM CST | SNOW 4.5 | Sioux City, IA | AT KCAU |
| Feb 21, 8:50 PM CST | SNOW 5 | Sioux City, IA | AT KTIV |
| Feb 21, 9:50 PM CST | SNOW 6.9 | Sioux City, IA | |
| Feb 21, 10:31 PM CST | SNOW 3.7 | Storm Lake, IA | |
| Feb 21, 11:30 PM CST | SNOW 8 | Sioux City, IA | |
| Feb 21, 11:32 PM CST | SNOW 8.4 | Sioux City, IA | |
| Feb 22, 4:28 AM CST | SNOW 10 | Sioux City, IA | |
| Feb 22, 5:40 AM CST | SNOW 8.7 | Sioux City, IA | |
| Feb 22, 6:00 AM CST | SNOW 9.2 | 1 Wsw Sergeant Bluff, IA | |
| Feb 22, 6:00 AM CST | SNOW 11 | Emerson, NE | |
| Feb 22, 6:30 AM CST | SNOW 9.7 | 5 N Sioux City, IA | |
| Feb 22, 7:00 AM CST | HEAVY SNOW 6 | 2 Nne Cleghorn, IA | |
| Feb 22, 7:30 AM CST | SNOW 7 | Holstein, IA | |
| Feb 22, 8:00 AM CST | SNOW 5.5 | Cherokee, IA | |
| Feb 22, 8:00 AM CST | HEAVY SNOW 6.3 | 3 Ne Battle Creek, IA | |
| Feb 22, 8:00 AM CST | SNOW 6.3 | 5 Wnw Ida Grove, IA | |
| Feb 22, 8:00 AM CST | SNOW 7 | Cherokee, IA | |
| Feb 22, 8:00 AM CST | SNOW 7.5 | Le Mars, IA | |
| Feb 22, 8:00 AM CST | SNOW 8 | 3 N Hornick, IA | |
| Feb 22, 8:00 AM CST | SNOW 8 | Akron, IA | |
| Feb 22, 8:00 AM CST | HEAVY SNOW 8.2 | Remsen, IA | |
| Feb 22, 8:00 AM CST | SNOW 10 | 3 N Sioux City, IA | |
| Feb 22, 8:00 AM CST | SNOW 10 | 3 S Sioux City, NE | |
| Feb 22, 8:00 AM CST | SNOW 11 | Wakefield, NE | |
| Feb 22, 9:00 AM CST | HEAVY SNOW 8.9 | Sioux City, IA |
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 00:00Z, 1.4 hours before the alert went out and 141 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
- 535 m above ground
- 0-6 km bulk shear
- 45 kt
- 0-1 km storm-relative helicity
- 382 m²/s²
- 0-3 km storm-relative helicity
- 556 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted, in the capitals the NWS used until 2016.
591 WWUS43 KFSD 220124 WSWFSD URGENT - WINTER WEATHER MESSAGE NATIONAL WEATHER SERVICE SIOUX FALLS SD 724 PM CST THU FEB 21 2013 IAZ020>022-031-032-NEZ013-014-220930- /O.UPG.KFSD.WW.Y.0004.000000T0000Z-130222T1500Z/ /O.NEW.KFSD.WS.W.0001.130222T0124Z-130222T1500Z/ PLYMOUTH-CHEROKEE-BUENA VISTA-WOODBURY-IDA-DIXON-DAKOTA- INCLUDING THE CITIES OF...LE MARS...CHEROKEE...STORM LAKE... SIOUX CITY...IDA GROVE...HOLSTEIN...BATTLE CREEK...WAKEFIELD... PONCA...ALLEN...SOUTH SIOUX CITY 724 PM CST THU FEB 21 2013 ...WINTER STORM WARNING IN EFFECT UNTIL 9 AM CST FRIDAY... THE NATIONAL WEATHER SERVICE IN SIOUX FALLS HAS ISSUED A WINTER STORM WARNING FOR HEAVY SNOW...WHICH IS IN EFFECT UNTIL 9 AM CST FRIDAY. THE WINTER WEATHER ADVISORY IS NO LONGER IN EFFECT. * TIMING...SNOW WILL OCCUR OVER THE AREA TONIGHT...DIMINISHING TO FLURRIES ON FRIDAY. * ACCUMULATIONS...6 INCHES OF SNOW IS LIKELY WITH LOCALLY HEAVIER AMOUNTS POSSIBLE. * WIND AND VISIBILITY...WINDS WILL BE NORTHEAST TONIGHT...THEN SHIFT TO THE NORTH TOWARD FRIDAY MORNING AND FINALLY NORTHWEST BY MIDDAY FRIDAY. SPEEDS WILL AVERAGE 15 TO 20 MPH. EVEN THOUGH THE WINDS ARE NOT EXCESSIVELY STRONG...VISIBILITIES WILL BE FREQUENTLY REDUCED IN SNOWFALL TO LESS THAN THREE QUARTERS OF A MILE TONIGHT. 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. && $$ SDZ050-057-063-220900- /O.CON.KFSD.WW.Y.0004.000000T0000Z-130222T0900Z/ GREGORY-BRULE-CHARLES MIX- INCLUDING THE CITIES OF...GREGORY...BURKE...CHAMBERLAIN... KIMBALL...WAGNER...PLATTE...LAKE ANDES...MARTY 724 PM CST THU FEB 21 2013 ...WINTER WEATHER ADVISORY REMAINS IN EFFECT UNTIL 3 AM CST FRIDAY... * TIMING...SNOW WILL CONTINUE THROUGH TONIGHT...THEN DIMINISH FRIDAY MORNING. * ACCUMULATIONS...THREE AND A HALF TO 6 INCHES OF SNOW IS LIKELY...WITH THE HEAVIEST AMOUNTS IN GREGORY COUNTY. * WIND AND VISIBILITY...NORTHEAST WINDS WILL AVERAGE 10 TO 20 MPH TONIGHT...SHIFTING TO THE NORTH AND NORTHWEST ON FRIDAY WITH SPEEDS ABOUT 10 TO 15 MPH. EVEN THOUGH THE WINDS ARE NOT EXCESSIVELY STRONG...VISIBILITIES WILL BE FREQUENTLY REDUCED IN SNOWFALL TO LESS THAN A MILE THROUGH TONIGHT. PRECAUTIONARY/PREPAREDNESS ACTIONS... A WINTER WEATHER ADVISORY FOR SNOW MEANS THAT PERIODS OF SNOW WILL CAUSE PRIMARILY TRAVEL DIFFICULTIES. BE PREPARED FOR SNOW COVERED ROADS AND LIMITED VISIBILITIES...AND USE CAUTION WHILE DRIVING. && $$ SDZ059>062-065>067-220930- /O.CON.KFSD.WW.Y.0004.000000T0000Z-130222T1500Z/ DAVISON-HANSON-MCCOOK-MINNEHAHA-HUTCHINSON-TURNER-LINCOLN- INCLUDING THE CITIES OF...MITCHELL...ALEXANDRIA...EMERY...SALEM... CANISTOTA...BRIDGEWATER...MONTROSE...SIOUX FALLS...PARKSTON... FREEMAN...MENNO...TRIPP...PARKER...CENTERVILLE...MARION... VIBORG...HURLEY...CHANCELLOR...CANTON...LENNOX...TEA...HARRISBURG 724 PM CST THU FEB 21 2013 ...WINTER WEATHER ADVISORY REMAINS IN EFFECT UNTIL 9 AM CST FRIDAY... * TIMING...SNOW WILL CONTINUE TONIGHT...DIMINISHING TO FLURRIES THROUGH THE DAY ON FRIDAY. * ACCUMULATIONS...2 AND A HALF TO 4 AND A HALF INCHES OF SNOW. THE HEAVIEST AMOUNTS WILL BE IN SOUTHEAST SOUTH DAKOTA...WITH THE LIGHTER AMOUNTS TOWARD THE MITCHELL AREA. * WIND AND VISIBILITY...NORTHEAST WINDS WILL AVERAGE 10 TO 20 MPH TONIGHT...SHIFTING TO THE NORTH AND NORTHWEST ON FRIDAY WITH SPEEDS ABOUT 10 TO 15 MPH. EVEN THOUGH THE WINDS ARE NOT EXCESSIVELY STRONG...VISIBILITIES WILL BE FREQUENTLY REDUCED IN SNOWFALL TO LESS THAN THREE QUARTERS OF A MILE TONIGHT. 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. && $$ SDZ069>071-220930- /O.CON.KFSD.WW.Y.0004.000000T0000Z-130222T1500Z/ YANKTON-CLAY-UNION- INCLUDING THE CITIES OF...YANKTON...VERMILLION... NORTH SIOUX CITY...BERESFORD...ELK POINT...ALCESTER...JEFFERSON 724 PM CST THU FEB 21 2013 ...WINTER WEATHER ADVISORY REMAINS IN EFFECT UNTIL 9 AM CST FRIDAY... * TIMING...SNOW WILL OCCUR OVER THE AREA TONIGHT...DIMINISHING TO FLURRIES ON FRIDAY. * ACCUMULATIONS...3 TO 5 INCHES OF SNOW. * WIND AND VISIBILITY...WINDS WILL BE NORTHEAST TONIGHT...THEN SHIFT TO THE NORTH TOWARD FRIDAY MORNING AND FINALLY NORTHWEST BY MIDDAY FRIDAY. SPEEDS WILL AVERAGE 10 TO 20 MPH. EVEN THOUGH THE WINDS ARE NOT EXCESSIVELY STRONG...VISIBILITIES WILL BE FREQUENTLY REDUCED IN SNOWFALL TO LESS THAN A MILE THROUGH TONIGHT. PRECAUTIONARY/PREPAREDNESS ACTIONS... A WINTER WEATHER ADVISORY FOR SNOW MEANS THAT PERIODS OF SNOW WILL CAUSE PRIMARILY TRAVEL DIFFICULTIES. BE PREPARED FOR SNOW COVERED ROADS AND LIMITED VISIBILITIES...AND USE CAUTION WHILE DRIVING. && $$ SDZ058-064-068-220930- /O.CON.KFSD.WW.Y.0005.000000T0000Z-130222T1500Z/ AURORA-DOUGLAS-BON HOMME- INCLUDING THE CITIES OF...PLANKINTON...WHITE LAKE...STICKNEY... ARMOUR...CORSICA...DELMONT...TYNDALL...SCOTLAND...SPRINGFIELD... AVON...TABOR 724 PM CST THU FEB 21 2013 ...WINTER WEATHER ADVISORY REMAINS IN EFFECT UNTIL 9 AM CST FRIDAY... * TIMING...SNOW WILL CONTINUE TONIGHT...DIMINISHING TO FLURRIES ON FRIDAY. * ACCUMULATIONS...2 AND A HALF TO 4 INCHES OF SNOW...WITH THE HEAVIER AMOUNTS CLOSE TO THE NEBRASKA BORDER. * WIND AND VISIBILITY...NORTHEAST WINDS WILL AVERAGE 10 TO 20 MPH TONIGHT...SHIFTING TO THE NORTH AND NORTHWEST ON FRIDAY WITH SPEEDS ABOUT 10 TO 15 MPH. EVEN THOUGH THE WINDS ARE NOT EXCESSIVELY STRONG...VISIBILITIES WILL BE FREQUENTLY REDUCED IN SNOWFALL TO LESS THAN A MILE THROUGH TONIGHT. 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. && $$ IAZ001>003-012>014-MNZ080-081-089-090-098-220930- /O.CON.KFSD.WW.Y.0004.000000T0000Z-130222T1800Z/ LYON-OSCEOLA-DICKINSON-SIOUX-OBRIEN-CLAY-MURRAY-COTTONWOOD-NOBLES- JACKSON-ROCK- INCLUDING THE CITIES OF...ROCK RAPIDS...GEORGE...INWOOD... LARCHWOOD...SIBLEY...SPIRIT LAKE...MILFORD...ARNOLDS PARK... ORANGE CITY...SIOUX CENTER...SHELDON...HARTLEY...SANBORN... SPENCER...SLAYTON...FULDA...WINDOM...MOUNTAIN LAKE... WORTHINGTON...JACKSON...LAKEFIELD...LUVERNE 724 PM CST THU FEB 21 2013 ...WINTER WEATHER ADVISORY REMAINS IN EFFECT UNTIL NOON CST FRIDAY... * TIMING...SNOW WILL CONTINUE TO DEVELOP TONIGHT...THEN WILL SLOWLY DIMINISH THROUGH THE DAY ON FRIDAY. * ACCUMULATIONS...TWO AND A HALF TO 4 INCHES OF SNOW. * WIND AND VISIBILITY...NORTHEAST WINDS WILL AVERAGE 10 TO 20 MPH TONIGHT...SHIFTING TO THE NORTH ON FRIDAY WITH SPEEDS ABOUT 10 TO 15 MPH. EVEN THOUGH THE WINDS ARE NOT EXCESSIVELY STRONG... VISIBILITIES WILL BE FREQUENTLY REDUCED IN SNOWFALL TO LESS THAN A MILE TONIGHT. PRECAUTIONARY/PREPAREDNESS ACTIONS... A WINTER WEATHER ADVISORY FOR SNOW MEANS THAT PERIODS OF SNOW WILL CAUSE PRIMARILY TRAVEL DIFFICULTIES. BE PREPARED FOR SNOW COVERED ROADS AND LIMITED VISIBILITIES...AND USE CAUTION WHILE DRIVING. && $$
3 follow-up statements
046 WWUS43 KFSD 220339 WSWFSD URGENT - WINTER WEATHER MESSAGE NATIONAL WEATHER SERVICE SIOUX FALLS SD 939 PM CST THU FEB 21 2013 IAZ020>022-031-032-NEZ013-014-221145- /O.CON.KFSD.WS.W.0001.000000T0000Z-130222T1500Z/ PLYMOUTH-CHEROKEE-BUENA VISTA-WOODBURY-IDA-DIXON-DAKOTA- INCLUDING THE CITIES OF...LE MARS...CHEROKEE...STORM LAKE... SIOUX CITY...IDA GROVE...HOLSTEIN...BATTLE CREEK...WAKEFIELD... PONCA...ALLEN...SOUTH SIOUX CITY 939 PM CST THU FEB 21 2013 ...WINTER STORM WARNING REMAINS IN EFFECT UNTIL 9 AM CST FRIDAY... * TIMING...SNOW WILL OCCUR OVER THE AREA TONIGHT...DIMINISHING TO FLURRIES ON FRIDAY. * ACCUMULATIONS...5 TO 7 INCHES OF SNOW IS LIKELY...WITH SOME LOCALLY HEAVIER AMOUNTS CERTAINLY POSSIBLE. * WIND AND VISIBILITY...WINDS WILL BE NORTHEAST TONIGHT...THEN SHIFT TO THE NORTH TOWARD FRIDAY MORNING AND FINALLY NORTHWEST BY MIDDAY FRIDAY. SPEEDS WILL AVERAGE 15 TO 20 MPH. EVEN THOUGH THE WINDS ARE NOT EXCESSIVELY STRONG...VISIBILITIES WILL BE FREQUENTLY REDUCED IN SNOWFALL TO LESS THAN THREE QUARTERS OF A MILE TONIGHT. 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. && $$ SDZ050-057-063-220900- /O.CON.KFSD.WW.Y.0004.000000T0000Z-130222T0900Z/ GREGORY-BRULE-CHARLES MIX- INCLUDING THE CITIES OF...GREGORY...BURKE...CHAMBERLAIN... KIMBALL...WAGNER...PLATTE...LAKE ANDES...MARTY 939 PM CST THU FEB 21 2013 ...WINTER WEATHER ADVISORY REMAINS IN EFFECT UNTIL 3 AM CST FRIDAY... * TIMING...SNOW WILL CONTINUE THROUGH TONIGHT...THEN DIMINISH FRIDAY MORNING. * ACCUMULATIONS...THREE AND A HALF TO 6 INCHES OF SNOW IS LIKELY...WITH THE HEAVIEST AMOUNTS IN GREGORY COUNTY. * WIND AND VISIBILITY...NORTHEAST WINDS WILL AVERAGE 10 TO 20 MPH TONIGHT...SHIFTING TO THE NORTH AND NORTHWEST ON FRIDAY WITH SPEEDS ABOUT 10 TO 15 MPH. EVEN THOUGH THE WINDS ARE NOT EXCESSIVELY STRONG...VISIBILITIES WILL BE FREQUENTLY REDUCED IN SNOWFALL TO LESS THAN A MILE THROUGH TONIGHT. PRECAUTIONARY/PREPAREDNESS ACTIONS... A WINTER WEATHER ADVISORY FOR SNOW MEANS THAT PERIODS OF SNOW WILL CAUSE PRIMARILY TRAVEL DIFFICULTIES. BE PREPARED FOR SNOW COVERED ROADS AND LIMITED VISIBILITIES...AND USE CAUTION WHILE DRIVING. && $$ SDZ059>062-065>067-221145- /O.CON.KFSD.WW.Y.0004.000000T0000Z-130222T1500Z/ DAVISON-HANSON-MCCOOK-MINNEHAHA-HUTCHINSON-TURNER-LINCOLN- INCLUDING THE CITIES OF...MITCHELL...ALEXANDRIA...EMERY...SALEM... CANISTOTA...BRIDGEWATER...MONTROSE...SIOUX FALLS...PARKSTON... FREEMAN...MENNO...TRIPP...PARKER...CENTERVILLE...MARION... VIBORG...HURLEY...CHANCELLOR...CANTON...LENNOX...TEA...HARRISBURG 939 PM CST THU FEB 21 2013 ...WINTER WEATHER ADVISORY REMAINS IN EFFECT UNTIL 9 AM CST FRIDAY... * TIMING...SNOW WILL CONTINUE TONIGHT...DIMINISHING TO FLURRIES THROUGH THE DAY ON FRIDAY. * ACCUMULATIONS...2 AND A HALF TO 4 AND A HALF INCHES OF SNOW. THE HEAVIEST AMOUNTS WILL BE IN SOUTHEAST SOUTH DAKOTA...WITH THE LIGHTER AMOUNTS TOWARD THE MITCHELL AREA. * WIND AND VISIBILITY...NORTHEAST WINDS WILL AVERAGE 10 TO 20 MPH TONIGHT...SHIFTING TO THE NORTH AND NORTHWEST ON FRIDAY WITH SPEEDS ABOUT 10 TO 15 MPH. EVEN THOUGH THE WINDS ARE NOT EXCESSIVELY STRONG...VISIBILITIES WILL BE FREQUENTLY REDUCED IN SNOWFALL TO LESS THAN THREE QUARTERS OF A MILE TONIGHT. 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. && $$ SDZ069>071-221145- /O.CON.KFSD.WW.Y.0004.000000T0000Z-130222T1500Z/ YANKTON-CLAY-UNION- INCLUDING THE CITIES OF...YANKTON...VERMILLION... NORTH SIOUX CITY...BERESFORD...ELK POINT...ALCESTER...JEFFERSON 939 PM CST THU FEB 21 2013 ...WINTER WEATHER ADVISORY REMAINS IN EFFECT UNTIL 9 AM CST FRIDAY... * TIMING...SNOW WILL OCCUR OVER THE AREA TONIGHT...DIMINISHING TO FLURRIES ON FRIDAY. * ACCUMULATIONS...3 TO 5 INCHES OF SNOW. * WIND AND VISIBILITY...WINDS WILL BE NORTHEAST TONIGHT...THEN SHIFT TO THE NORTH TOWARD FRIDAY MORNING AND FINALLY NORTHWEST BY MIDDAY FRIDAY. SPEEDS WILL AVERAGE 10 TO 20 MPH. EVEN THOUGH THE WINDS ARE NOT EXCESSIVELY STRONG...VISIBILITIES WILL BE FREQUENTLY REDUCED IN SNOWFALL TO LESS THAN A MILE THROUGH TONIGHT. PRECAUTIONARY/PREPAREDNESS ACTIONS... A WINTER WEATHER ADVISORY FOR SNOW MEANS THAT PERIODS OF SNOW WILL CAUSE PRIMARILY TRAVEL DIFFICULTIES. BE PREPARED FOR SNOW COVERED ROADS AND LIMITED VISIBILITIES...AND USE CAUTION WHILE DRIVING. && $$ SDZ058-064-068-221145- /O.CON.KFSD.WW.Y.0005.000000T0000Z-130222T1500Z/ AURORA-DOUGLAS-BON HOMME- INCLUDING THE CITIES OF...PLANKINTON...WHITE LAKE...STICKNEY... ARMOUR...CORSICA...DELMONT...TYNDALL...SCOTLAND...SPRINGFIELD... AVON...TABOR 939 PM CST THU FEB 21 2013 ...WINTER WEATHER ADVISORY REMAINS IN EFFECT UNTIL 9 AM CST FRIDAY... * TIMING...SNOW WILL CONTINUE TONIGHT...DIMINISHING TO FLURRIES ON FRIDAY. * ACCUMULATIONS...2 AND A HALF TO 4 INCHES OF SNOW...WITH THE HEAVIER AMOUNTS CLOSE TO THE NEBRASKA BORDER. * WIND AND VISIBILITY...NORTHEAST WINDS WILL AVERAGE 10 TO 20 MPH TONIGHT...SHIFTING TO THE NORTH AND NORTHWEST ON FRIDAY WITH SPEEDS ABOUT 10 TO 15 MPH. EVEN THOUGH THE WINDS ARE NOT EXCESSIVELY STRONG...VISIBILITIES WILL BE FREQUENTLY REDUCED IN SNOWFALL TO LESS THAN A MILE THROUGH TONIGHT. 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. && $$ IAZ001>003-012>014-MNZ080-081-089-090-098-221145- /O.CON.KFSD.WW.Y.0004.000000T0000Z-130222T1800Z/ LYON-OSCEOLA-DICKINSON-SIOUX-OBRIEN-CLAY-MURRAY-COTTONWOOD-NOBLES- JACKSON-ROCK- INCLUDING THE CITIES OF...ROCK RAPIDS...GEORGE...INWOOD... LARCHWOOD...SIBLEY...SPIRIT LAKE...MILFORD...ARNOLDS PARK... ORANGE CITY...SIOUX CENTER...SHELDON...HARTLEY...SANBORN... SPENCER...SLAYTON...FULDA...WINDOM...MOUNTAIN LAKE... WORTHINGTON...JACKSON...LAKEFIELD...LUVERNE 939 PM CST THU FEB 21 2013 ...WINTER WEATHER ADVISORY REMAINS IN EFFECT UNTIL NOON CST FRIDAY... * TIMING...SNOW WILL CONTINUE TO DEVELOP TONIGHT...THEN WILL SLOWLY DIMINISH THROUGH THE DAY ON FRIDAY. * ACCUMULATIONS...GENERALLY TWO AND A HALF TO 4 INCHES OF SNOW. LOCALIZED AREAS WILL SEE LESS SNOW THEN THIS. * WIND AND VISIBILITY...NORTHEAST WINDS WILL AVERAGE 10 TO 20 MPH TONIGHT...SHIFTING TO THE NORTH ON FRIDAY WITH SPEEDS ABOUT 10 TO 15 MPH. EVEN THOUGH THE WINDS ARE NOT EXCESSIVELY STRONG... VISIBILITIES WILL BE FREQUENTLY REDUCED IN SNOWFALL TO LESS THAN A MILE TONIGHT. PRECAUTIONARY/PREPAREDNESS ACTIONS... A WINTER WEATHER ADVISORY FOR SNOW MEANS THAT PERIODS OF SNOW WILL CAUSE PRIMARILY TRAVEL DIFFICULTIES. BE PREPARED FOR SNOW COVERED ROADS AND LIMITED VISIBILITIES...AND USE CAUTION WHILE DRIVING. && $$
658 WWUS43 KFSD 220935 WSWFSD URGENT - WINTER WEATHER MESSAGE NATIONAL WEATHER SERVICE SIOUX FALLS SD 335 AM CST FRI FEB 22 2013 IAZ020>022-031-032-NEZ013-014-221500- /O.CON.KFSD.WS.W.0001.000000T0000Z-130222T1500Z/ PLYMOUTH-CHEROKEE-BUENA VISTA-WOODBURY-IDA-DIXON-DAKOTA- INCLUDING THE CITIES OF...LE MARS...CHEROKEE...STORM LAKE... SIOUX CITY...IDA GROVE...HOLSTEIN...BATTLE CREEK...WAKEFIELD... PONCA...ALLEN...SOUTH SIOUX CITY 335 AM CST FRI FEB 22 2013 ...WINTER STORM WARNING REMAINS IN EFFECT UNTIL 9 AM CST THIS MORNING... * TIMING...LIGHT SNOW WILL CONTINUE THROUGH MID MORNING...THEN DIMINISH TO FLURRIES LATE THIS MORNING THROUGH THE AFTERNOON. * ACCUMULATIONS...STORM TOTAL SNOW ACCUMULATIONS OF 5 TO 9 INCHES...WITH SOME LOCALLY HEAVIER AMOUNTS CERTAINLY POSSIBLE. 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. && $$ SDZ059>062-065>067-221500- /O.CON.KFSD.WW.Y.0004.000000T0000Z-130222T1500Z/ DAVISON-HANSON-MCCOOK-MINNEHAHA-HUTCHINSON-TURNER-LINCOLN- INCLUDING THE CITIES OF...MITCHELL...ALEXANDRIA...EMERY...SALEM... CANISTOTA...BRIDGEWATER...MONTROSE...SIOUX FALLS...PARKSTON... FREEMAN...MENNO...TRIPP...PARKER...CENTERVILLE...MARION... VIBORG...HURLEY...CHANCELLOR...CANTON...LENNOX...TEA...HARRISBURG 335 AM CST FRI FEB 22 2013 ...WINTER WEATHER ADVISORY REMAINS IN EFFECT UNTIL 9 AM CST THIS MORNING... * TIMING...LIGHT SNOW WILL CONTINUE THROUGH AROUND MID MORNING...THEN DIMINISH TO FLURRIES LATE THIS MORNING THROUGH THE AFTERNOON. * ACCUMULATIONS...STORM TOTAL SNOW ACCCUMULATIOS OF 2 AND A HALF TO 5 AND A HALF INCHES. THE HEAVIEST AMOUNTS ARE EXPECTED IN SOUTHEAST SOUTH DAKOTA...WITH THE LIGHTER AMOUNTS TOWARD THE MITCHELL AREA. PRECAUTIONARY/PREPAREDNESS ACTIONS... A WINTER WEATHER ADVISORY FOR SNOW MEANS THAT PERIODS OF SNOW WILL CAUSE PRIMARILY TRAVEL DIFFICULTIES. BE PREPARED FOR SNOW COVERED ROADS AND LIMITED VISIBILITIES...AND USE CAUTION WHILE DRIVING. && $$ SDZ069>071-221500- /O.CON.KFSD.WW.Y.0004.000000T0000Z-130222T1500Z/ YANKTON-CLAY-UNION- INCLUDING THE CITIES OF...YANKTON...VERMILLION... NORTH SIOUX CITY...BERESFORD...ELK POINT...ALCESTER...JEFFERSON 335 AM CST FRI FEB 22 2013 ...WINTER WEATHER ADVISORY REMAINS IN EFFECT UNTIL 9 AM CST THIS MORNING... * TIMING...LIGHT SNOW WILL CONTINUE THROUGH MID MORNING AND DIMINISH TO FLURRIES LATE MORNING THROUGH THE AFTERNOON. * ACCUMULATIONS...STORM TOTAL SNOW ACCUMULATIONS OF 3 TO 5 INCHES. 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. && $$ SDZ058-064-068-221500- /O.CON.KFSD.WW.Y.0005.000000T0000Z-130222T1500Z/ AURORA-DOUGLAS-BON HOMME- INCLUDING THE CITIES OF...PLANKINTON...WHITE LAKE...STICKNEY... ARMOUR...CORSICA...DELMONT...TYNDALL...SCOTLAND...SPRINGFIELD... AVON...TABOR 335 AM CST FRI FEB 22 2013 ...WINTER WEATHER ADVISORY REMAINS IN EFFECT UNTIL 9 AM CST THIS MORNING... * TIMING...LIGHT SNOW WILL CONTINUE THROUGH MID MORNING...THEN DIMINISH TO FLURRIES LATE MORNING THROUGH THE AFTERNOON. * ACCUMULATIONS...STORM TOTAL SNOW ACCUMULATIONS OF 2 AND A HALF TO 4 INCHES...WITH THE HEAVIER AMOUNTS CLOSE TO THE NEBRASKA BORDER. PRECAUTIONARY/PREPAREDNESS ACTIONS... A WINTER WEATHER ADVISORY FOR SNOW MEANS THAT PERIODS OF SNOW WILL CAUSE PRIMARILY TRAVEL DIFFICULTIES. BE PREPARED FOR SNOW COVERED ROADS AND LIMITED VISIBILITIES...AND USE CAUTION WHILE DRIVING. && $$ IAZ001>003-012>014-MNZ080-081-089-090-098-221745- /O.CON.KFSD.WW.Y.0004.000000T0000Z-130222T1800Z/ LYON-OSCEOLA-DICKINSON-SIOUX-OBRIEN-CLAY-MURRAY-COTTONWOOD-NOBLES- JACKSON-ROCK- INCLUDING THE CITIES OF...ROCK RAPIDS...GEORGE...INWOOD... LARCHWOOD...SIBLEY...SPIRIT LAKE...MILFORD...ARNOLDS PARK... ORANGE CITY...SIOUX CENTER...SHELDON...HARTLEY...SANBORN... SPENCER...SLAYTON...FULDA...WINDOM...MOUNTAIN LAKE... WORTHINGTON...JACKSON...LAKEFIELD...LUVERNE 335 AM CST FRI FEB 22 2013 ...WINTER WEATHER ADVISORY REMAINS IN EFFECT UNTIL NOON CST TODAY... * TIMING...LIGHT SNOW WILL CONTINUE THROUGH THE MORNING...THEN DIMINISH TO FLURRIES THIS AFTERNOON. * ACCUMULATIONS...STORM TOTAL ACCUMULATIONS OF AROUND TWO AND A HALF TO 4 INCHES OF SNOW. LOCALIZED AREAS WILL SEE LESS SNOW THAN THIS. 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. && $$
249 WWUS43 KFSD 221455 WSWFSD URGENT - WINTER WEATHER MESSAGE NATIONAL WEATHER SERVICE SIOUX FALLS SD 855 AM CST FRI FEB 22 2013 IAZ020>022-031-032-NEZ013-014-221600- /O.EXP.KFSD.WS.W.0001.000000T0000Z-130222T1500Z/ PLYMOUTH-CHEROKEE-BUENA VISTA-WOODBURY-IDA-DIXON-DAKOTA- INCLUDING THE CITIES OF...LE MARS...CHEROKEE...STORM LAKE... SIOUX CITY...IDA GROVE...HOLSTEIN...BATTLE CREEK...WAKEFIELD... PONCA...ALLEN...SOUTH SIOUX CITY 855 AM CST FRI FEB 22 2013 ...WINTER STORM WARNING WILL EXPIRE AT 9 AM CST THIS MORNING... LIGHT SNOW WILL CONTINUE THROUGH THE LATE MORNING...THOUGH ANY ADDITIONAL ACCUMULATION WILL BE A HALF AN INCH OR LESS. $$ SDZ059>062-065>067-221600- /O.EXP.KFSD.WW.Y.0004.000000T0000Z-130222T1500Z/ DAVISON-HANSON-MCCOOK-MINNEHAHA-HUTCHINSON-TURNER-LINCOLN- INCLUDING THE CITIES OF...MITCHELL...ALEXANDRIA...EMERY...SALEM... CANISTOTA...BRIDGEWATER...MONTROSE...SIOUX FALLS...PARKSTON... FREEMAN...MENNO...TRIPP...PARKER...CENTERVILLE...MARION... VIBORG...HURLEY...CHANCELLOR...CANTON...LENNOX...TEA...HARRISBURG 855 AM CST FRI FEB 22 2013 ...WINTER WEATHER ADVISORY WILL EXPIRE AT 9 AM CST THIS MORNING... LIGHT SNOW WILL CONTINUE THROUGH THE LATE MORNING...THOUGH ANY ADDITIONAL ACCUMULATION WILL BE A HALF AN INCH OR LESS. $$ SDZ069>071-221600- /O.EXP.KFSD.WW.Y.0004.000000T0000Z-130222T1500Z/ YANKTON-CLAY-UNION- INCLUDING THE CITIES OF...YANKTON...VERMILLION... NORTH SIOUX CITY...BERESFORD...ELK POINT...ALCESTER...JEFFERSON 855 AM CST FRI FEB 22 2013 ...WINTER WEATHER ADVISORY WILL EXPIRE AT 9 AM CST THIS MORNING... LIGHT SNOW WILL CONTINUE THROUGH THE LATE MORNING...THOUGH ANY ADDITIONAL ACCUMULATION WILL BE A HALF AN INCH OR LESS. $$ SDZ058-064-068-221600- /O.EXP.KFSD.WW.Y.0005.000000T0000Z-130222T1500Z/ AURORA-DOUGLAS-BON HOMME- INCLUDING THE CITIES OF...PLANKINTON...WHITE LAKE...STICKNEY... ARMOUR...CORSICA...DELMONT...TYNDALL...SCOTLAND...SPRINGFIELD... AVON...TABOR 855 AM CST FRI FEB 22 2013 ...WINTER WEATHER ADVISORY WILL EXPIRE AT 9 AM CST THIS MORNING... LIGHT SNOW MAY CONTINUE THROUGH THE LATE MORNING...THOUGH LITTLE ADDITIONAL ACCUMULATION IS EXPECTED. $$ IAZ001>003-012>014-MNZ080-081-089-090-098-221800- /O.CON.KFSD.WW.Y.0004.000000T0000Z-130222T1800Z/ LYON-OSCEOLA-DICKINSON-SIOUX-OBRIEN-CLAY-MURRAY-COTTONWOOD-NOBLES- JACKSON-ROCK- INCLUDING THE CITIES OF...ROCK RAPIDS...GEORGE...INWOOD... LARCHWOOD...SIBLEY...SPIRIT LAKE...MILFORD...ARNOLDS PARK... ORANGE CITY...SIOUX CENTER...SHELDON...HARTLEY...SANBORN... SPENCER...SLAYTON...FULDA...WINDOM...MOUNTAIN LAKE... WORTHINGTON...JACKSON...LAKEFIELD...LUVERNE 855 AM CST FRI FEB 22 2013 ...WINTER WEATHER ADVISORY REMAINS IN EFFECT UNTIL NOON CST TODAY... * TIMING...LIGHT SNOW WILL CONTINUE THROUGH THE LATE MORNING...THEN DIMINISH TO FLURRIES THIS AFTERNOON. * ACCUMULATIONS...STORM TOTAL ACCUMULATIONS OF AROUND TWO AND A HALF TO 4 INCHES OF SNOW. LOCALIZED AREAS WILL SEE LESS SNOW THAN THIS. PRECAUTIONARY/PREPAREDNESS ACTIONS... A WINTER WEATHER ADVISORY FOR SNOW MEANS THAT PERIODS OF SNOW WILL CAUSE PRIMARILY TRAVEL DIFFICULTIES. BE PREPARED FOR SNOW COVERED ROADS AND LIMITED VISIBILITIES...AND USE CAUTION WHILE DRIVING. && $$
What forecasters said that day
The local office's own words before this winter storm warning went out, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.
NWS Sioux Falls, SD wrote its last area forecast discussion before this winter storm warning went out at Feb 21, 7:13 PM CST, 11 minutes earlier.
Area forecast discussion, Feb 21, 7:13 PM CST, 11 minutes before
AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE SIOUX FALLS SD
713 PM CST THU FEB 21 2013
.DISCUSSION.../ISSUED AT 400 PM CST/
DRY AIR ACROSS MINNESOTA AND NORTHERN IOWA CONTINUES TO FLOW INTO
THE CWA AND HAVING AN IMPACT ON SNOW SPREADING NORTH INTO CWA. ONLY
EXCEPTION IS FAR SOUTHWEST CWA WHERE SNOW HAS BEEN FALLING THROUGH
THE DAY. AIRMASS SHOULD SATURATE DURING THE NIGHT AS SYSTEM LIFTS TO
THE NORTHEAST. HOWEVER...SHOWERS AND THUNDERSTORMS OVER MISSISSIPPI
VALLEY RACING RAPIDLY EASTWARD AND APPEARS TO HAVE SOME IMPACT ON
THE LOW LEVEL JET BY CUTTING IT OFF FURTHER NORTH...AND THIS COULD
ALSO HAVE AN IMPACT BY KEEPING DRIER AIR OVER MINNESOTA MOVING WEST
DURING THE NIGHT. SNOW AMOUNTS HAVE BEEN ADJUSTED SLIGHTLY LOWER FOR
THESE REASONS WITH 3 TO 5 INCHES ACROSS NORTHWEST IOWA AND AND 2 TO
4 ELSEWHERE...WITH THE EXCEPTION OF FAR SOUTHWEST CWA WHERE TOTAL
SNOW OF 4 TO 7 INCHES EXPECTED. THE BULK OF ACCUMULATING SNOW SHOULD
BE OVER BY 09Z MOST PLACES...EXCEPT SOUTHWEST MINNESOTA...WHERE AN
INCH OR SO OF ADDITIONAL SNOW POSSIBLE. WILL KEEP ADVISORIES GOING
AS IS FOR THE NIGHT INTO FRIDAY MORNING.
ON FRIDAY...LINGERING LIGHT SNOW WILL CONTINUE TO WRAP AROUND UPPER
LOW ACROSS CWA WITH BEST CHANCE OVER SOUTHWEST MINNESOTA. EVEN
THOUGH AREAS WILL SEE LESS THAN AN INCH. NOT A WIDE RANGE IN
TEMPERATURES FOR TONIGHT INTO FRIDAY...WITH CLOUDS KEEPING LOWS UP
TONIGHT...AND COLD AIR ADVECTION ONLY ALLOWING FOR A 5 TO 10 DEGREE
RISE FROM MORNING LOWS. /
TEMPS -8 TO -12C IN CLOUD LAYER AND WEAK DIV Q LIKELY TO KEEP A FEW
FLURRIES BRUSHING ACROSS THE EASTERN CWA THROUGH THE EVENING...BUT
EVENTUALLY LOOK FOR LOW LEVEL RIDGING TO NUDGE CLOUDS EAST FROM MUCH
OF THE AREA. TEMPERATURES ARE SOMEWHAT DIFFICULT WITH A STRONG
DEPENDENCE ON TIMING OF CLEARING...GIVEN THE DIMINISHED WINDS IN
SURFACE RIDGE. RESISTED GOING TOO COLD...BUT DID SIDE ON COLD SIDE
OF GUIDANCE. ON SATURDAY...MID LEVEL RIDGE WILL KEEP QUIET WEATHER
IN PLACE...AND WITH SOUTHERLY FLOW WILL FIND TEMPERATURES WARMING.
SNOWCOVER WILL KEEP MOST READINGS IN THE 20S...WITH PERHAPS A FEW
READINGS AROUND 30 WEST. CLOUDS WILL INCREASE SAT NIGHT AS TROUGH IN
THE WEST STARTS TO PUSH THROUGH THE ROCKIES...WITH LOW TEMPS
RESTRAINED SOMEWHAT BY INCREASING LOW LEVEL MOISTURE/SOUTHERLY FLOW.
DID TRIM BACK PRECIP CHANCES SOMEWHAT FROM SUNDAY AS FAVOR SHOWN
TOWARD THE SLOWER PROGRESSION ENVELOPE...BUT KEPT SOME CHANCES
SPREADING INTO THE WEST AND SOUTH THROUGH THE DAY AS LEADING DIV Q
AND FRONTOGENESIS STARTS TO FOCUS INTO SOUTHERN CWA.
IN THE EXTENDED RANGE /MONDAY THROUGH THURSDAY/ BROAD AGREEMENT
WHICH WAS PRESENT IN THE LARGER SCALE PATTERN BECAME UNRAVELED WITH
12Z GFS AND ITS ENSEMBLE...THROWING A TREMENDOUS AMOUNT OF ENERGY
INTO THE NORTHERN STREAM AND MINIMIZING ENERGY IN THE SOUTHERN
STREAM COMPARATIVELY. OTHER CLUSTER OF SOLUTIONS INCLUDING CANADIAN
GLOBAL AND ECMWF HAVE SOME NORTHERN ENERGY...BUT ALSO HAVE HAD A
SLIGHT SOUTHWARD TREND WITH SOUTHERN WAVE...PULLING THREAT OF MORE
SIGNIFICANT SNOWFALL AWAY TO THE SOUTH. CONFIDENCE IS NOT VERY HIGH
IN EVOLUTION...BUT DID SHIFT ALLEGIANCE MUCH MORE TOWARD THE
SOUTHERN ENERGY CLUSTER. DEEPER TYPE SOLUTIONS ARE SLOWER...AND
KEEP NORTHERN EDGE OF SYSTEM AROUND THE EASTERN CWA MUCH LONGER INTO
TUESDAY AND PERHAPS TUESDAY NIGHT. WILL CONTINUE GENERALLY HIGHER
PRECIP THREAT SOUTHEAST TO LESSER NORTHWEST THROUGH THE PERIOD...BUT
KEEP THE HIGHEST AT HIGHER CHANCE TO LIKELY AT MOST. SYSTEM WILL
HAVE A GREATER WIND POTENTIAL...BUT AGAIN SHOULD BE FAR ENOUGH
SOUTHEAST TO KEEP SIGNIFICANT WIND IMPACTS AWAY. AFTER THIS SYSTEM
PULLS OUT...A FAIRLY TRANQUIL PERIOD WITH RIDGE PUSHING SLOWLY IN
FROM THE WEST. TEMPS GENERALLY SLIGHTLY BELOW NORMAL WITH SNOW
COVER...BUT NO SIGNS OF ANY BITTERLY COLD AIR. /CHAPMAN
&&
.AVIATION.../FOR THE 00Z TAF ISSUANCE/
SNOW CONTINUES TO MOVE ACROSS THE AREA TONIGHT. IFR CONDITIONS IN
SNOW IS THE PREDOMINATE CATEGORY...WITH LIFR VISIBILITY REDUCTIONS
BELOW A MILE IN THE HEAVIER SNOW. EXPECT THIS TO CONTINUE THROUGH
AROUND 08Z...WITH THE SNOW TAPERING OFF AFTER THAT POINT AND
VISIBILITIES GENERALLY REMAINING ABOVE 1 MILE. OUR FAR NORTH
INCLUDING KHON WILL LIKELY SEE THE LEAST IMPACT FROM THIS
SNOW...WITH LIFR VISIBILITIES LESS LIKELY OVERNIGHT. LIGHT SNOW AND
IFR CIGS WILL LIKELY LINGER INTO THE MORNING. CIGS WILL RISE INTO
THE MVFR RANGE BY MID TO LATE MORNING...WITH JUST VERY LIGHT SNOW OR
FLURRIES POSSIBLY LINGERING INTO THE AFTERNOON. /CHENARD
&&
.FSD WATCHES/WARNINGS/ADVISORIES...
IA...WINTER WEATHER ADVISORY FROM 3 PM THIS AFTERNOON TO 9 AM CST
FRIDAY FOR IAZ020>022-031-032.
WINTER WEATHER ADVISORY FROM 6 PM THIS EVENING TO NOON CST
FRIDAY FOR IAZ001>003-012>014.
MN...WINTER WEATHER ADVISORY FROM 6 PM THIS EVENING TO NOON CST
FRIDAY FOR MNZ080-081-089-090-098.
NE...WINTER WEATHER ADVISORY FROM 3 PM THIS AFTERNOON TO 9 AM CST
FRIDAY FOR NEZ013-014.
SD...WINTER WEATHER ADVISORY FROM 3 PM THIS AFTERNOON TO 9 AM CST
FRIDAY FOR SDZ058-064-068>071.
WINTER WEATHER ADVISORY FROM 6 PM THIS EVENING TO 9 AM CST
FRIDAY FOR SDZ059>062-065>067.
WINTER WEATHER ADVISORY UNTIL 3 AM CST FRIDAY FOR SDZ050-
057-063.
&&Hazardous weather outlook, Feb 21, 4:35 AM CST, 14 hours 49 minutes before
HAZARDOUS WEATHER OUTLOOK NATIONAL WEATHER SERVICE SIOUX FALLS SD 0435 AM CST THU FEB 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- 0435 AM CST THU FEB 21 2013 THIS HAZARDOUS WEATHER OUTLOOK IS FOR SOUTHEAST SOUTH DAKOTA... SOUTHWEST MINNESOTA...NORTHWEST IOWA...AND NORTHEAST NEBRASKA. .DAY ONE...TODAY AND TONIGHT WINTER WEATHER... SNOW WILL GRADUALLY SPREAD FROM SOUTH TO NORTH TODAY WITH LIGHT TO MODERATE SNOWFALL BECOMING WIDESPREAD BY THIS EVENING. LOCALLY MODERATE TO HEAVY SNOWFALL WILL BE POSSIBLE MAINLY IN NORTHWEST IOWA AND EXTREME SOUTHEAST SOUTH DAKOTA THIS EVENING. LIGHT SNOWFALL WILL CONTINUE OVERNIGHT BEFORE DIMINISHING TO FLURRIES DURING THE DAY ON FRIDAY. STORM TOTAL SNOWFALL AMOUNTS WILL GENERALLY BE AROUND 3 TO 5 INCHES SOUTH OF INTERSTATE 90 WITH LOCALLY UP TO AROUND 6 INCHES SOUTH OF SPENCER IOWA TO SIOUX CITY LINE. AREAS NORTH OF INTERSTATE 90 CAN EXPECT AROUND 2 TO 4 INCHES. WIND IS NOT EXPECTED TO BE A PROBLEM SO BLOWING AND DRIFTING SHOULD BE FAIRLY MINIMAL...HOWEVER VISIBILITY MAY BE REDUCED TO LESS THAN A MILE AT TIMES IN SNOWFALL. .DAYS TWO THROUGH SEVEN...FRIDAY THROUGH WEDNESDAY SNOWFALL WILL AGAIN BE POSSIBLE LATE SUNDAY THROUGH MONDAY NIGHT. WHILE THE TRACK OF THIS POTENTIAL WINTER STORM IS FAR FROM CERTAIN...IT COULD CARRY MORE OF A THREAT FOR HEAVY SNOWFALL AS WELL AS BLOWING AND DRIFTING SNOW. PLEASE STAY TUNED FOR ANY CHANGES TO THIS POTENTIAL WINTER STORM. .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.
In the hours before
Local storm report, Feb 21, 4:39 PM CST, 2 hours 45 minutes before
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE SIOUX FALLS SD
439 PM CST THU FEB 21 2013
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..
0425 PM SNOW SIOUX CITY 42.50N 96.39W
02/21/2013 M1.5 INCH WOODBURY IA CO-OP OBSERVER
&&
CHENARDLocal storm report, Feb 21, 4:47 PM CST, 2 hours 37 minutes before
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE SIOUX FALLS SD
447 PM CST THU FEB 21 2013
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..
0430 PM SNOW NORTH SIOUX CITY 42.54N 96.50W
02/21/2013 E1.5 INCH UNION SD BROADCAST MEDIA
&&
MFUHSLocal storm report, Feb 21, 5:41 PM CST, 1 hour 43 minutes before
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE SIOUX FALLS SD
541 PM CST THU FEB 21 2013
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..
0530 PM SNOW SIOUX CITY 42.50N 96.39W
02/21/2013 M2.8 INCH WOODBURY IA CO-OP OBSERVER
&&
CHENARDLocal storm report, Feb 21, 5:54 PM CST, 1 hour 30 minutes before
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE SIOUX FALLS SD
554 PM CST THU FEB 21 2013
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..
0552 PM SNOW SIOUX FALLS 43.54N 96.73W
02/21/2013 M0.6 INCH MINNEHAHA SD OFFICIAL NWS OBS
&&
MFUHSLocal storm report, Feb 21, 6:02 PM CST, 1 hour 22 minutes before
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE SIOUX FALLS SD
602 PM CST THU FEB 21 2013
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..
0600 PM SNOW HAWARDEN 43.00N 96.48W
02/21/2013 E2.0 INCH SIOUX IA PUBLIC
&&
MFUHSLocal storm report, Feb 21, 6:19 PM CST, 1 hour 5 minutes before
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE SIOUX FALLS SD
619 PM CST THU FEB 21 2013
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..
0615 PM SNOW NORTH SIOUX CITY 42.54N 96.50W
02/21/2013 M3.0 INCH UNION SD BROADCAST MEDIA
&&
MFUHSNearby
Winter Storm Warnings in Iowa, 2013Winter Storm Warnings in Nebraska, 2013Every winter storm warning 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; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.