Alert archive / Oklahoma / Special Weather Statements in 2012

Special Weather Statement, NWS Norman, OK

August 18, 2012Blaine County, Canadian County, Oklahoma

NWS Norman, OK issued this special weather statement at Aug 18, 2012, 12:21 PM CDT for Blaine County, Canadian County, Oklahoma. It was in force for 39 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
Aug 18, 2012, 12:21 PM CDT (17:21 UTC)
Expired
Aug 18, 2012, 1:00 PM CDT
In force
39 min
Issued by
NWS Norman, OK

Counties Blaine County, OK, Canadian County, OK

The radar

The Norman radar (KTLX), 83 km from the middle of the area, began a volume at 17:21 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

Norman, OK (KOUN), launched 12:00Z, 5.4 hours before the alert went out and 81 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, Norman, OK at 12:00Z on 2012-08-18Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 884 joules per kilogram.LCLLFCEL10008507005003002001001 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, Norman, OK at 12:00Z on 2012-08-18The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 183 square meters per square second.193958Sfc1 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
884 J/kg
Mixed-layer CIN
-162 J/kg
Mixed-layer LCL
892 m above ground
0-6 km bulk shear
27 kt
0-1 km storm-relative helicity
183 m²/s²
0-3 km storm-relative helicity
395 m²/s²
Significant tornado parameter
0.0
Supercell composite
13.2

Open this sounding in Storm Lab

The text

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

242 
WWUS84 KOUN 181722
SPSOUN

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE NORMAN OK
1221 PM CDT SAT AUG 18 2012

OKZ016>019-023>025-181800-
LOGAN OK-OKLAHOMA OK-CUSTER OK-BLAINE OK-KINGFISHER OK-CADDO OK-
CANADIAN OK-
1221 PM CDT SAT AUG 18 2012

...SIGNIFICANT WEATHER ADVISORY FOR SOUTHWESTERN LOGAN...
NORTHWESTERN OKLAHOMA...EASTERN CUSTER...SOUTHERN BLAINE...
SOUTHWESTERN KINGFISHER...NORTHERN CADDO AND CANADIAN COUNTIES
UNTIL 100 PM CDT...

AT 1217 PM CDT...STRONG THUNDERSTORMS WERE ALONG A LINE EXTENDING
FROM 9 MILES SOUTHEAST OF THOMAS TO 9 MILES EAST OF GREENFIELD TO
PIEDMONT...MOVING EAST SOUTHEAST AT 35 MPH.

HAZARDS INCLUDE...
HAIL UP TO ONE-HALF INCH DIAMETER... 
WIND GUSTS 40 TO 50 MPH...

LOCATIONS IMPACTED INCLUDE...
EDMOND...EL RENO...WEATHERFORD...KINGFISHER...YUKON...BETHANY...
CONCHO...THE VILLAGE...WARR ACRES...WATONGA...NICHOLS HILLS...
PIEDMONT...HINTON...GEARY...OKARCHE...HYDRO...CASHION...CALUMET...
GREENFIELD AND BRIDGEPORT.

LAT...LON 3593 9852 3592 9780 3569 9735 3545 9753
      3538 9804 3555 9882
TIME...MOT...LOC 1717Z 85DEG 36KT 3568 9859 3576 9822 3564 9774 

$$

The office that day

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

IssuedProductOfficeCountiesLasted
Aug 18, 6:36 AM CDTSpecial Weather StatementOUNHarper24 min
Aug 18, 7:08 AM CDTSpecial Weather StatementOUNWoods52 min
Aug 18, 7:57 AM CDTSpecial Weather StatementOUNAlfalfa, Major, Woods48 min
Aug 18, 8:12 AM CDTSpecial Weather StatementOUNHarper33 min
Aug 18, 8:25 AM CDTSpecial Weather StatementOUNGarfield, Kay, Major50 min
Aug 18, 8:31 AM CDTSpecial Weather StatementOUNOklahoma29 min
Aug 18, 8:42 AM CDTSpecial Weather StatementOUNOklahoma33 min
Aug 18, 9:16 AM CDTSpecial Weather StatementOUNKingfisher, Logan44 min
Aug 18, 9:36 AM CDTSpecial Weather StatementOUNOklahoma24 min
Aug 18, 9:41 AM CDTSpecial Weather StatementOUNWoods49 min
Aug 18, 9:57 AM CDTSpecial Weather StatementOUNLogan48 min
Aug 18, 10:21 AM CDTSpecial Weather StatementOUNLincoln, Oklahoma39 min
Aug 18, 10:26 AM CDTSpecial Weather StatementOUNWoodward49 min
Aug 18, 10:45 AM CDTSevere Thunderstorm WarningOUNWoodward32 min
Aug 18, 11:16 AM CDTSpecial Weather StatementOUNBlaine29 min
Aug 18, 11:24 AM CDTSevere Thunderstorm WarningOUNBlaine, Dewey, Kingfisher, Major36 min
Aug 18, 12:52 PM CDTSpecial Weather StatementOUNCaddo, Canadian, Cleveland, Oklahoma53 min
Aug 18, 12:56 PM CDTSpecial Weather StatementOUNGarvin64 min
Aug 18, 2:01 PM CDTSpecial Weather StatementOUNCarter, Jefferson44 min
Aug 18, 2:22 PM CDTSpecial Weather StatementOUNTillman38 min
Aug 18, 2:27 PM CDTSpecial Weather StatementOUNTillman33 min
Aug 18, 2:42 PM CDTSpecial Weather StatementOUNStephens33 min
Aug 18, 2:56 PM CDTSpecial Weather StatementOUNLove49 min
Aug 18, 3:16 PM CDTSpecial Weather StatementOUNStephens29 min
Aug 18, 3:22 PM CDTSpecial Weather StatementOUNCotton23 min
Aug 18, 2:52 PM CDTSpecial Weather StatementOUNFoard38 min
Aug 18, 3:33 PM CDTSpecial Weather StatementOUNBaylor27 min
Aug 18, 3:55 PM CDTSpecial Weather StatementOUNWichita35 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.