Alert archive / South Dakota / Winter Weather Advisories in 2009
Winter Weather Advisory 13, NWS Sioux Falls, SD
NWS Sioux Falls, SD issued this winter weather advisory at Mar 9, 2009, 4:05 PM CDT for 16 counties in South Dakota; 11 counties in Iowa; Jackson County, Nobles County, Rock County, Minnesota. It took effect at Mar 10, 2009, 7:00 AM CDT. It was in force for .
The area
The counties it named.
The facts
- Issued
- Mar 9, 2009, 4:05 PM CDT (21:05 UTC)
- In effect from
- Mar 10, 2009, 7:00 AM CDT
- Expired
- Mar 10, 2009, 3:40 AM CDT
- In force
- Issued by
- NWS Sioux Falls, SD
All 30 counties
Buena Vista County, IA, Cherokee County, IA, Clay County, IA, Dickinson County, IA, Ida County, IA, Lyon County, IA, O'Brien County, IA, Osceola County, IA, Plymouth County, IA, Sioux County, IA, Woodbury County, IA, Jackson County, MN, Nobles County, MN, Rock County, MN, Aurora County, SD, Bon Homme 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, Lincoln County, SD, McCook County, SD, Minnehaha County, SD, Turner County, SD, Union County, SD, Yankton County, SD
The radar
The Sioux Falls radar (KFSD), 40 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 225 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
- 448 m above ground
- 0-6 km bulk shear
- 76 kt
- 0-1 km storm-relative helicity
- 434 m²/s²
- 0-3 km storm-relative helicity
- 527 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
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 Mar 9, 3:10 PM CDT, 55 minutes earlier.
Area forecast discussion, Mar 9, 3:10 PM CDT, 55 minutes before
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</html>Hazardous weather outlook, Mar 9, 5:46 AM CDT, 10 hours 19 minutes before
HAZARDOUS WEATHER OUTLOOK NATIONAL WEATHER SERVICE SIOUX FALLS SD 0446 AM CST MON MAR 09 2009 SDZ038>040-050-052>071-MNZ071-072-080-081-089-090-097-098- IAZ001>003-012>014-020>022-031-032-NEZ013-014-101200- 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- 0446 AM CST MON MAR 09 2009 THIS HAZARDOUS WEATHER OUTLOOK IS FOR SOUTHEAST SOUTH DAKOTA... SOUTHWEST MINNESOTA...NORTHWEST IOWA...AND NORTHEAST NEBRASKA. .DAY ONE...TODAY AND TONIGHT WINTER WEATHER... CHANCES FOR WINTRY WEATHER WILL BEGIN TO INCREASE TONIGHT AS A STRONG STORM SYSTEM APPROACHES. FREEZING DRIZZLE IS EXPECTED TO DEVELOP IN SOME AREAS OF SOUTHEAST SOUTH DAKOTA...SOUTHWEST MINNESOTA...AND NORTHWEST IOWA TONIGHT. ONLY LIGHT ACCUMULATIONS OF FREEZING DRIZZLE ARE EXPECTED...ALTHOUGH EVEN LIGHT AMOUNTS MAY MAKE ROAD SURFACES SLICK. INTO CENTRAL SOUTH DAKOTA SNOW IS EXPECTED TO DEVELOP LATE TONIGHT...HOWEVER THE MAIN SNOW ACCUMULATIONS WILL OCCUR DURING THE DAY ON TUESDAY. FOG... WIDESPREAD DENSE FOG WILL REDUCE VISIBILITY TO A QUARTER MILE OR LESS THIS MORNING. THE FOG IS EXPECTED TO PERSIST THROUGH MID MORNING...WITH VISIBILITIES BEGINNING TO IMPROVE BY 10 AM. .DAYS TWO THROUGH SEVEN...TUESDAY THROUGH SUNDAY A MAJOR WINTER STORM WILL MOVE ACROSS THE NORTHERN PLAINS TUESDAY AND TUESDAY NIGHT. SNOW WILL SPREAD EAST ACROSS THE AREA ON TUESDAY...WITH VERY STRONG WINDS LIKELY DEVELOPING TUESDAY AFTERNOON INTO TUESDAY NIGHT. THIS COMBINATION WILL PRODUCE WINTRY WEATHER AND POOR TRAVEL CONDITIONS OVER MUCH OF THE REGION...AND BRING A POTENTIAL FOR BLIZZARD CONDITIONS TO NORTHEAST SOUTH DAKOTA AND CENTRAL MINNESOTA. ALTHOUGH MOST OF THE PRECIPITATION WILL FALL AS SNOW WITH THIS STORM SYSTEM...THERE IS THE POTENTIAL FOR A PERIOD OF FREEZING RAIN TUESDAY MORNING ACROSS NORTHWEST IOWA AND SOUTHWEST MINNESOTA...AND FAR SOUTHEAST SOUTH DAKOTA. .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. 97
The office that day
Everything else NWS Sioux Falls, SD issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Mar 9, 3:44 AM CDT | Dense Fog Advisory | FSD | Brookings, Clay, Lake, Lincoln, McCook, Minnehaha and 3 more | 6 hr |
| Mar 9, 3:45 AM CDT | Blizzard Watch | FSD | Brookings | 12 hr |
| Mar 9, 10:01 AM CDT | Dense Fog Advisory | FSD | Brookings, Clay, Lake, Lincoln, McCook, Minnehaha and 3 more | 119 min |
| Mar 9, 4:05 PM CDT | Winter Storm Warning | FSD | Beadle, Brookings, Jerauld, Kingsbury, Lake, Miner and 2 more | 12 hr |
| Mar 9, 6:46 PM CDT | Winter Weather Advisory | FSD | Bon Homme, Brookings, Clay, Hanson, Hutchinson, Kingsbury and 9 more | 4 hr |
| Mar 9, 6:58 PM CDT | Dense Fog Advisory | FSD | Buena Vista, Cherokee, Clay, Dickinson, Ida, O'Brien and 1 more | 5 hr |
Nearby
Winter Weather Advisories in South Dakota, 2009Winter Weather Advisories in Iowa, 2009Winter Weather Advisories in Minnesota, 2009Every winter weather advisory in 2009
Sources
The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.