Alert archive / South Dakota / Wind Advisories in 2012

Wind Advisory 17, NWS Rapid City, SD

March 19, 20126 counties in South Dakota

NWS Rapid City, SD issued this wind advisory at Mar 19, 2012, 3:44 AM MDT for 6 counties in South Dakota. It took effect at Mar 19, 2012, 8:54 AM MDT. It was in force for 11 hr.

The area

The counties it named.

The facts

Issued
Mar 19, 2012, 3:44 AM MDT (09:44 UTC)
In effect from
Mar 19, 2012, 8:54 AM MDT
Expired
Mar 19, 2012, 8:00 PM MDT
In force
11 hr
Issued by
NWS Rapid City, SD

Counties Butte County, SD, Harding County, SD, Lawrence County, SD, Meade County, SD, Perkins County, SD, Ziebach County, SD

The radar

The Rapid City radar (KUDX), 96 km from the middle of the area, began a volume at 09:47 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

Rapid City, SD (KUNR), launched 00:00Z, 9.7 hours before the alert went out and 101 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, Rapid City, SD at 00:00Z on 2012-03-19Temperature 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, Rapid City, SD at 00:00Z on 2012-03-19The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 88 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
3963 m above ground
0-6 km bulk shear
54 kt
0-1 km storm-relative helicity
88 m²/s²
0-3 km storm-relative helicity
243 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 wind advisory went out, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.

NWS Rapid City, SD wrote its last area forecast discussion before this wind advisory went out at Mar 19, 3:34 AM MDT, 10 minutes earlier.

Area forecast discussion, Mar 19, 3:34 AM MDT, 10 minutes before
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Hazardous weather outlook, Mar 18, 3:58 AM MDT, 23 hours 46 minutes before
HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE RAPID CITY SD
358 AM MDT SUN MAR 18 2012

SDZ001-002-012>014-024>032-041>044-046-047-049-072>074-WYZ054>058-
071-191400-
BENNETT-BUTTE-CENTRAL BLACK HILLS-CUSTER CO PLAINS-FALL RIVER-HAAKON-
HARDING-HERMOSA FOOT HILLS-JACKSON-MELLETTE-NORTHEASTERN CROOK-
NORTHERN BLACK HILLS-NORTHERN CAMPBELL-NORTHERN FOOT HILLS-
NORTHERN MEADE CO PLAINS-PENNINGTON CO PLAINS-PERKINS-RAPID CITY-
SHANNON-SOUTHERN BLACK HILLS-SOUTHERN CAMPBELL-SOUTHERN FOOT HILLS-
SOUTHERN MEADE CO PLAINS-STURGIS/PIEDMONT FOOT HILLS-TODD-TRIPP-
WESTERN CROOK-WESTON-WYOMING BLACK HILLS-ZIEBACH-
358 AM MDT (458 AM CDT) SUN MAR 18 2012

...RED FLAG WARNING TODAY FOR NORTHEASTERN WYOMING WESTERN SOUTH
DAKOTA...

...WIND ADVISORY TODAY FOR MUCH OF WESTERN SOUTH DAKOTA...

THIS HAZARDOUS WEATHER OUTLOOK IS FOR WESTERN SOUTH DAKOTA AND
NORTHEASTERN WYOMING.

.DAY ONE...THIS AFTERNOON AND TONIGHT

NEAR RECORD HIGH TEMPERATURES AND VERY LOW RELATIVE HUMIDITY VALUES
COMBINED WITH GUSTY SOUTHERLY WINDS WILL CREATE DANGEROUS FIRE
WEATHER CONDITIONS OVER NORTHEASTERN WYOMING AND WESTERN AND CENTRAL
SOUTH DAKOTA TODAY INTO THIS EVENING. ISOLATED DRY THUNDERSTORMS ARE
POSSIBLE OVER PARTS OF NORTHEASTERN WYOMING LATE THIS AFTERNOON.
SOUTHERLY WINDS OF 30 TO 40 MPH WITH GUSTS TO AROUND 50 MPH ARE
EXPECTED ACROSS MUCH OF WESTERN SOUTH DAKOTA THIS AFTERNOON.

.DAYS TWO THROUGH SEVEN...MONDAY THROUGH SATURDAY

THERE IS A SLIGHT CHANCE OF THUNDERSTORMS OVER SOUTH CENTRAL SOUTH
DAKOTA ON MONDAY.

.SPOTTER INFORMATION STATEMENT...

SPOTTER ACTIVATION WILL NOT BE NEEDED TODAY.

GR

In the hours before

Local storm report, Mar 18, 10:01 PM MDT, 5 hours 43 minutes before
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Local storm report, Mar 18, 10:18 PM MDT, 5 hours 26 minutes before
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Local storm report, Mar 18, 10:19 PM MDT, 5 hours 25 minutes before
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Local storm report, Mar 18, 10:27 PM MDT, 5 hours 17 minutes before
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Local storm report, Mar 18, 10:43 PM MDT, 5 hours 1 minute before
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Special weather statement, Mar 18, 10:49 PM MDT, 4 hours 55 minutes before
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The office that day

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

IssuedProductOfficeCountiesLasted
Mar 18, 9:11 PM MDTSevere Thunderstorm WarningUNRMellette, Todd, Tripp48 min
Mar 18, 9:20 PM MDTTornado WarningUNRTodd25 min
Mar 18, 9:42 PM MDTSevere Thunderstorm WarningUNRHaakon, Jackson, Ziebach51 min

Nearby

Wind Advisories in South Dakota, 2012Every wind advisory in 2012

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.