Alert archive / South Dakota / Winter Storm Watches in 2011

Winter Storm Watch 2, NWS Aberdeen, SD

March 22, 20114 counties in South Dakota; Big Stone County, Traverse County, Minnesota

NWS Aberdeen, SD issued this winter storm watch at Mar 22, 2011, 3:59 AM CDT for 4 counties in South Dakota; Big Stone County, Traverse County, Minnesota. It took effect at Mar 22, 2011, 10:00 PM CDT. It was in force for .

The area

The counties it named.

The facts

Issued
Mar 22, 2011, 3:59 AM CDT (08:59 UTC)
In effect from
Mar 22, 2011, 10:00 PM CDT
Expired
Mar 22, 2011, 10:34 AM CDT
In force
Issued by
NWS Aberdeen, SD

Counties Big Stone County, MN, Traverse County, MN, Day County, SD, Grant County, SD, Marshall County, SD, Roberts County, SD

The radar

The Aberdeen radar (KABR), 113 km from the middle of the area, began a volume at 09:03 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 00:00Z, 9.0 hours before the alert went out and 132 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.

Skew-T log-pSkew-T log-p diagram, Aberdeen, SD at 00:00Z on 2011-03-22Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 0 joules per kilogram.LCL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°0°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Aberdeen, SD at 00:00Z on 2011-03-22The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 142 square meters per square second.1939587897Sfc1 km3 km6 km9 kmRMLM
The wind turning with height, colored by layer: ground to 1 km, 1 to 3 km, 3 to 6 km, 6 to 10 km.
Mixed-layer CAPE
0 J/kg
Mixed-layer CIN
No buoyant parcel
Mixed-layer LCL
1334 m above ground
0-6 km bulk shear
64 kt
0-1 km storm-relative helicity
142 m²/s²
0-3 km storm-relative helicity
353 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

Open this sounding in Storm Lab

What forecasters said that day

The local office's own words before this winter storm watch went out, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.

NWS Aberdeen, SD wrote its last area forecast discussion before this winter storm watch went out at Mar 22, 3:59 AM CDT, 0 minutes earlier.

Area forecast discussion, Mar 22, 3:59 AM CDT, 0 minutes before
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Hazardous weather outlook, Mar 21, 7:26 AM CDT, 20 hours 33 minutes before
HAZARDOUS WEATHER OUTLOOK...CORRECTED
NATIONAL WEATHER SERVICE ABERDEEN SD
726 AM CDT MON MAR 21 2011

SDZ003>005-009-010-015>017-033>037-045-048-051-221230-
CORSON-CAMPBELL-MCPHERSON-WALWORTH-EDMUNDS-DEWEY-POTTER-FAULK-
STANLEY-SULLY-HUGHES-HYDE-HAND-JONES-LYMAN-BUFFALO-
726 AM CDT MON MAR 21 2011 /626 AM MDT MON MAR 21 2011/

THIS HAZARDOUS WEATHER OUTLOOK IS FOR PORTIONS OF CENTRAL SOUTH
DAKOTA AND NORTH CENTRAL SOUTH DAKOTA.

.DAY ONE...TODAY AND TONIGHT

NO HAZARDOUS WEATHER IS EXPECTED AT THIS TIME.

.DAYS TWO THROUGH SEVEN...TUESDAY THROUGH SUNDAY

PRECIPITATION AHEAD OF A DEVELOPING STORM SYSTEM WILL BEGIN TO
REACH THE REGION LATE MONDAY NIGHT/TUESDAY MORNING...WITH
WIDESPREAD SHOWER AND THUNDERSTORM ACTIVITY. THUNDERSTORMS ARE NOT
EXPECTED TO BE SEVERE...HOWEVER RAINFALL DURING THE DAY TUESDAY
COULD EXACERBATE ANY ONGOING FLOOD ISSUES. PRECIPITATION WILL
CHANGE OVER TO SNOW STARTING AT THE NORTH DAKOTA BORDER DURING
MID DAY TUESDAY...PROGRESSING SOUTH THROUGH THE AFTERNOON AND
EVENING...WITH THE ENTIRE CWA UNDER A COLD ENOUGH AIRMASS FOR
ACCUMULATING SNOW BY WEDNESDAY MORNING. IMPROVING CONDITIONS
EXPECTED LATE WEDNESDAY INTO EARLY THURSDAY...HOWEVER LOCATIONS IN
THE NORTHERN SISSETON HILLS/WEST CENTRAL MINNESOTA COULD SEE AS
MUCH AS 4" OF SNOW. LOWER AMOUNTS ARE EXPECTED ELSEWHERE.

.SPOTTER INFORMATION STATEMENT...

SPOTTER ACTIVATION IS NOT ANTICIPATED TODAY OR TONIGHT.

MNZ039-046-SDZ006>008-011-018>023-221230-
TRAVERSE-BIG STONE-BROWN-MARSHALL-ROBERTS-DAY-SPINK-CLARK-
CODINGTON-GRANT-HAMLIN-DEUEL-
726 AM CDT MON MAR 21 2011

THIS HAZARDOUS WEATHER OUTLOOK IS FOR PORTIONS OF WEST CENTRAL
MINNESOTA AND NORTHEAST SOUTH DAKOTA.

.DAY ONE...TODAY AND TONIGHT

MORNING FOG IS EXPECTED FOR LOCATIONS LOCATED IN THE JAMES VALLEY
AND SISSETON HILLS.

.DAYS TWO THROUGH SEVEN...TUESDAY THROUGH SUNDAY

PRECIPITATION AHEAD OF A DEVELOPING STORM SYSTEM WILL BEGIN TO
REACH THE REGION LATE MONDAY NIGHT/TUESDAY MORNING...WITH
WIDESPREAD SHOWER AND THUNDERSTORM ACTIVITY. THUNDERSTORMS ARE NOT
EXPECTED TO BE SEVERE...HOWEVER RAINFALL DURING THE DAY TUESDAY
COULD EXACERBATE ANY ONGOING FLOOD ISSUES. PRECIPITATION WILL
CHANGE OVER TO SNOW STARTING AT THE NORTH DAKOTA BORDER DURING
MID DAY TUESDAY...PROGRESSING SOUTH THROUGH THE AFTERNOON AND
EVENING...WITH THE ENTIRE CWA UNDER A COLD ENOUGH AIRMASS FOR
ACCUMULATING SNOW BY WEDNESDAY MORNING. IMPROVING CONDITIONS
EXPECTED LATE WEDNESDAY INTO EARLY THURSDAY...HOWEVER LOCATIONS IN
THE NORTHERN SISSETON HILLS/WEST CENTRAL MINNESOTA COULD SEE AS
MUCH AS 4" OF SNOW. LOWER AMOUNTS ARE EXPECTED ELSEWHERE.

.SPOTTER INFORMATION STATEMENT...

SPOTTER ACTIVATION IS NOT ANTICIPATED TODAY OR TONIGHT.

CONNELLY

The office that day

Everything else NWS Aberdeen, SD issued on the same UTC day.

IssuedProductOfficeCountiesLasted
Mar 21, 9:28 PM CDTRiver Flood WarningABRBrown242 days
Mar 21, 10:35 PM CDTSevere Thunderstorm WarningABRBuffalo, Hand25 min
Mar 21, 11:56 PM CDTRiver Flood WarningABRCodington57 hr
Mar 22, 9:59 AM CDTAreal Flood WarningABRClark, Hamlin6 days
Mar 22, 10:34 AM CDTWinter Storm WarningABRBrown, Clark, Codington, Day, Deuel, Grant and 4 more28 hr
Mar 22, 10:34 AM CDTWinter Weather AdvisoryABRCampbell, Corson, Dewey, Edmunds, Faulk, McPherson and 2 more28 hr
Mar 22, 12:32 PM CDTRiver Flood WarningABRBrown46 hr
Mar 22, 2:50 PM CDTAreal Flood WarningABRSpink24 hr

Nearby

Winter Storm Watches in South Dakota, 2011Winter Storm Watches in Minnesota, 2011Every winter storm watch 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; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.