Alert archive / Oklahoma / Special Weather Statements in 2012

Special Weather Statement, NWS Norman, OK

April 7, 2012Payne County, Oklahoma

NWS Norman, OK issued this special weather statement at Apr 7, 2012, 4:51 AM CDT for Payne County, Oklahoma. It was in force for 24 min. No storm report in the archive falls inside the area while it was in force.

The area

The outline as issued.

The facts

Issued
Apr 7, 2012, 4:51 AM CDT (09:51 UTC)
Expired
Apr 7, 2012, 5:15 AM CDT
In force
24 min
Issued by
NWS Norman, OK

County Payne County, OK

The radar

The Norman radar (KTLX), 88 km from the middle of the area, began a volume at 09:52 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

Lamont, OK (KLMN), launched 00:00Z, 9.9 hours before the alert went out and 68 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, Lamont, OK at 00:00Z on 2012-04-07Temperature 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, Lamont, OK at 00:00Z on 2012-04-07The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 31 square meters per square second.19395878Sfc1 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
1093 m above ground
0-6 km bulk shear
38 kt
0-1 km storm-relative helicity
31 m²/s²
0-3 km storm-relative helicity
141 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.3

Open this sounding in Storm Lab

The text

As transmitted, in the capitals the NWS used until 2016.

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What forecasters said that day

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

NWS Norman, OK wrote its last area forecast discussion before this special weather statement went out at Apr 7, 4:16 AM CDT, 35 minutes earlier.

Area forecast discussion, Apr 7, 4:16 AM CDT, 35 minutes before
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Hazardous weather outlook, Apr 7, 4:16 AM CDT, 35 minutes before
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In the hours before

Special weather statement, Apr 7, 12:41 AM CDT, 4 hours 10 minutes before
SPECIAL WEATHER STATEMENTNATIONAL WEATHER SERVICE NORMAN OK1241 AM
CDT SAT APR 7 2012

OKZ015>017-070615-
CUSTER OK-BLAINE OK-DEWEY OK-
1241 AM CDT SAT APR 7 2012

...SIGNIFICANT WEATHER ADVISORY FOR CUSTER...SOUTHWESTERN BLAINE
AND SOUTHEASTERN DEWEY COUNTIES UNTIL 115 AM CDT...

AT 1240 AM CDT...A STRONG THUNDERSTORM WAS LOCATED 7 MILES
NORTHWEST OF CUSTER CITY...MOVING EAST AT 35 MPH.

HAZARDS INCLUDE...
HAIL UP TO ONE-HALF INCH DIAMETER...
WIND GUSTS TO 50 MPH...

LOCATIONS IMPACTED INCLUDE...
THOMAS...CUSTER CITY...OAKWOOD...FAY AND EAGLE CITY.

LAT...LON 3601 9857 3565 9845 3562 9904 3579 9910
TIME...MOT...LOC 0540Z 255DEG 29KT 3572 9899
Special weather statement, Apr 7, 1:58 AM CDT, 2 hours 53 minutes before
SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE NORMAN OK
158 AM CDT SAT APR 7 2012

OKZ018-024-070730-
KINGFISHER OK-CANADIAN OK-
158 AM CDT SAT APR 7 2012

...SIGNIFICANT WEATHER ADVISORY FOR KINGFISHER AND NORTH CENTRAL
CANADIAN COUNTIES UNTIL 230 AM CDT...

AT 154 AM CDT...A STRONG THUNDERSTORM WAS LOCATED 8 MILES NORTH OF
CALUMET...MOVING NORTHEAST AT 35 MPH.

HAZARDS INCLUDE...
HAIL UP TO ONE-HALF INCH DIAMETER...
WIND GUSTS TO 40 MPH...

LOCATIONS IMPACTED INCLUDE...
KINGFISHER...OKARCHE...CALUMET AND DOVER.

LAT...LON 3588 9768 3573 9768 3558 9814 3569 9820
      3579 9820 3605 9783
TIME...MOT...LOC 0654Z 242DEG 32KT 3571 9817
Local storm report, Apr 7, 2:31 AM CDT, 2 hours 20 minutes before
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Local storm report, Apr 7, 2:55 AM CDT, 1 hour 56 minutes before
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Special weather statement, Apr 7, 3:16 AM CDT, 1 hour 35 minutes before
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Special weather statement, Apr 7, 4:51 AM CDT, 0 minutes before
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The office that day

Everything else NWS Norman, OK issued on the same UTC day.

IssuedProductOfficeCountiesLasted
Apr 6, 11:35 PM CDTSpecial Weather StatementOUNDewey25 min
Apr 7, 12:25 AM CDTSpecial Weather StatementOUNBlaine35 min
Apr 7, 12:41 AM CDTSpecial Weather StatementOUNCuster34 min
Apr 7, 1:58 AM CDTSpecial Weather StatementOUNKingfisher32 min
Apr 7, 2:24 AM CDTSevere Thunderstorm WarningOUNKingfisher51 min
Apr 7, 3:16 AM CDTSpecial Weather StatementOUNKingfisher, Logan29 min
Apr 7, 4:40 PM CDTSpecial Weather StatementOUNWichita20 min

Nearby

Special Weather Statements in Oklahoma, 2012Every special weather statement 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.