Alert archive / Oklahoma / Special Weather Statements in 2012

Special Weather Statement, NWS Norman, OK

April 3, 2012Johnston County, Oklahoma

NWS Norman, OK issued this special weather statement at Apr 3, 2012, 4:40 PM CDT for Johnston County, Oklahoma. It was in force for 35 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 3, 2012, 4:40 PM CDT (21:40 UTC)
Expired
Apr 3, 2012, 5:15 PM CDT
In force
35 min
Issued by
NWS Norman, OK

County Johnston County, OK

The radar

The Norman radar (KTLX), 147 km from the middle of the area, began a volume at 21:41 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

Fort Worth, TX (KFWD), launched 12:00Z, 9.7 hours before the alert went out and 162 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, Fort Worth, TX at 12:00Z on 2012-04-03Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 1939 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, Fort Worth, TX at 12:00Z on 2012-04-03The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 109 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
1939 J/kg
Mixed-layer CIN
-2 J/kg
Mixed-layer LCL
469 m above ground
0-6 km bulk shear
39 kt
0-1 km storm-relative helicity
109 m²/s²
0-3 km storm-relative helicity
92 m²/s²
Significant tornado parameter
0.6
Supercell composite
2.8

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 3, 3:58 PM CDT, 42 minutes earlier.

Area forecast discussion, Apr 3, 3:58 PM CDT, 42 minutes before
AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE NORMAN OK
358 PM CDT TUE APR 3 2012

.DISCUSSION...
THE UPPER/MID-LEVEL CIRCULATION OVER NORTHEAST NEW MEXICO WILL
DRIFT SLOWLY EAST OVER THE NEXT SEVERAL DAYS. IT IS EXPECTED TO BE
CENTERED OVER OKLAHOMA TOMORROW...MAINTAINING AT LEAST A CHANCE OF
ISOLATED SHOWERS/THUNDERSTORMS THROUGH TOMORROW. SINCE DRIER AIR
WILL BE ENTRAINED INTO THE SYSTEM BY TOMORROW...RAIN CHANCES WILL
DECREASE RAPIDLY LATE TONIGHT INTO TOMORROW...BUT SCATTERED SHOWERS
WILL STILL BE POSSIBLE OVER PARTS OF NORTHERN OKLAHOMA AS LATE AS
TOMORROW AFTERNOON.

DRY AND MILD WEATHER IS EXPECTED FOR THURSDAY AND FRIDAY...BUT
MOISTURE WILL RETURN FOR THE WEEKEND...BRINGING MORE CHANCES FOR
RAIN AND THUNDERSTORMS. A SURFACE FRONT IS ALSO EXPECTED TO JOIN
IN DURING THE WEEKEND...WHICH WILL LIKELY PROVIDE SOMETHING OF A
FOCUS FOR CONVECTION...BUT ITS POSITION IS STILL DIFFICULT TO
PINPOINT THIS FAR OUT.

&&

.PRELIMINARY POINT TEMPS/POPS...
OKLAHOMA CITY OK  52  71  53  74 /  50  20   0   0
HOBART OK         46  70  48  73 /  20  10   0   0
WICHITA FALLS TX  50  77  53  80 /  20  10   0   0
GAGE OK           43  68  46  71 /  50  20   0   0
PONCA CITY OK     54  70  49  66 /  80  30  10  10
DURANT OK         55  74  55  78 /  50  10   0  10

&&

.OUN WATCHES/WARNINGS/ADVISORIES...
OK...NONE.
TX...NONE.
&&

02/23
Hazardous weather outlook, Apr 3, 11:55 AM CDT, 4 hours 45 minutes before
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In the hours before

Local storm report, Apr 3, 12:43 PM CDT, 3 hours 57 minutes before
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Special weather statement, Apr 3, 1:35 PM CDT, 3 hours 5 minutes before
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Special weather statement, Apr 3, 3:42 PM CDT, 58 minutes before
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Special weather statement, Apr 3, 3:50 PM CDT, 50 minutes before
SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE NORMAN OK
350 PM CDT TUE APR 3 2012

OKZ043-048-032115-
ATOKA OK-COAL OK-
350 PM CDT TUE APR 3 2012

...SIGNIFICANT WEATHER ADVISORY FOR WEST CENTRAL ATOKA AND SOUTH
CENTRAL COAL COUNTIES UNTIL 415 PM CDT...

AT 345 PM CDT...A STRONG THUNDERSTORM WAS LOCATED NEAR WAPANUCKA...
MOVING NORTH-NORTHEAST AT 25 MPH.

HAZARDS INCLUDE...
HAIL UP TO THE SIZE OF DIMES...
WIND GUSTS TO 50 MPH...

LOCATIONS IMPACTED INCLUDE...
COALGATE...LEHIGH...PHILLIPS...OLNEY AND BOGGY DEPOT STATE PARK.

LAT...LON 3429 9631 3431 9641 3440 9641 3459 9639
      3453 9615
TIME...MOT...LOC 2045Z 196DEG 22KT 3434 9636

EM
Special weather statement, Apr 3, 4:40 PM CDT, 0 minutes before
SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE NORMAN OK
440 PM CDT TUE APR 3 2012

OKZ047-048-051-032215-
MARSHALL OK-JOHNSTON OK-ATOKA OK-
440 PM CDT TUE APR 3 2012

...SIGNIFICANT WEATHER ADVISORY FOR NORTHEASTERN MARSHALL...
JOHNSTON AND SOUTHWESTERN ATOKA COUNTIES UNTIL 515 PM CDT...

AT 436 PM CDT...A STRONG THUNDERSTORM WAS LOCATED NEAR LITTLE CITY...
MOVING NORTHEAST AT 30 MPH.

HAZARDS INCLUDE...
HAIL UP TO THE SIZE OF NICKELS...
WIND GUSTS TO 50 MPH...

LOCATIONS IMPACTED INCLUDE...
MILBURN...COLEMAN...FILLMORE...NIDA AND LITTLE CITY.

LAT...LON 3411 9655 3411 9657 3409 9658 3405 9666
      3414 9676 3439 9648 3422 9632
TIME...MOT...LOC 2136Z 226DEG 27KT 3411 9665

EM

The office that day

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

IssuedProductOfficeCountiesLasted
Apr 2, 7:06 PM CDTSpecial Weather StatementOUNSeminole24 min
Apr 2, 7:26 PM CDTSevere Thunderstorm WarningOUNEllis, Roger Mills, Woodward49 min
Apr 2, 8:25 PM CDTSpecial Weather StatementOUNBeckham, Greer, Harmon, Jackson50 min
Apr 2, 8:33 PM CDTSpecial Weather StatementOUNEllis27 min
Apr 2, 8:36 PM CDTSevere Thunderstorm WarningOUNBeckham, Greer, Harmon, Jackson, Roger Mills39 min
Apr 2, 8:42 PM CDTSevere Thunderstorm WarningOUNEllis, Harper33 min
Apr 2, 9:15 PM CDTSevere Thunderstorm WarningOUNGreer, Jackson, Kiowa, Tillman75 min
Apr 2, 9:18 PM CDTSpecial Weather StatementOUNBeckham, Roger Mills42 min
Apr 2, 10:11 PM CDTSpecial Weather StatementOUNBeckham, Custer, Dewey, Ellis, Harper, Roger Mills and 1 more34 min
Apr 2, 10:27 PM CDTSevere Thunderstorm WarningOUNCaddo, Comanche, Cotton, Kiowa, Tillman, Washita63 min
Apr 2, 10:33 PM CDTSevere Thunderstorm WarningOUNEllis, Harper, Woodward27 min
Apr 2, 10:58 PM CDTSevere Thunderstorm WarningOUNHarper, Woods, Woodward62 min
Apr 2, 11:01 PM CDTSpecial Weather StatementOUNBlaine, Custer, Dewey59 min
Apr 2, 11:19 PM CDTSpecial Weather StatementOUNGrady, Stephens26 min
Apr 2, 11:27 PM CDTSevere Thunderstorm WarningOUNAlfalfa, Blaine, Dewey, Major, Woods, Woodward63 min
Apr 2, 11:30 PM CDTSevere Thunderstorm WarningOUNCaddo, Comanche, Cotton, Grady, Stephens60 min
Apr 2, 11:32 PM CDTSpecial Weather StatementOUNCanadian, Kingfisher28 min
Apr 2, 11:52 PM CDTSevere Thunderstorm WarningOUNJackson, Tillman38 min
Apr 3, 12:49 AM CDTSevere Thunderstorm WarningOUNJackson, Tillman56 min
Apr 3, 1:25 AM CDTSpecial Weather StatementOUNKiowa50 min
Apr 3, 1:39 AM CDTSevere Thunderstorm WarningOUNTillman66 min
Apr 3, 2:59 AM CDTSpecial Weather StatementOUNCotton, Tillman46 min
Apr 3, 3:09 AM CDTSpecial Weather StatementOUNCaddo, Grady51 min
Apr 3, 6:23 AM CDTSpecial Weather StatementOUNJefferson, Stephens37 min
Apr 3, 1:35 PM CDTSpecial Weather StatementOUNCarter, Love25 min
Apr 3, 2:50 PM CDTAreal Flood AdvisoryOUNJefferson3 hr
Apr 3, 3:42 PM CDTSpecial Weather StatementOUNCoal33 min
Apr 3, 3:50 PM CDTSpecial Weather StatementOUNCoal25 min
Apr 3, 5:58 PM CDTSpecial Weather StatementOUNRoger Mills32 min
Apr 3, 6:39 PM CDTSpecial Weather StatementOUNDewey, Woodward36 min
Apr 2, 7:28 PM CDTSpecial Weather StatementOUNBaylor32 min
Apr 2, 8:13 PM CDTSpecial Weather StatementOUNFoard, Hardeman, Knox17 min
Apr 2, 8:23 PM CDTSevere Thunderstorm WarningOUNBaylor, Foard, Hardeman, Knox, Wilbarger52 min
Apr 2, 10:29 PM CDTSpecial Weather StatementOUNArcher46 min
Apr 2, 11:15 PM CDTSpecial Weather StatementOUNArcher60 min
Apr 2, 11:47 PM CDTSpecial Weather StatementOUNWilbarger28 min
Apr 3, 12:34 AM CDTSpecial Weather StatementOUNWilbarger41 min
Apr 3, 8:45 AM CDTSevere Thunderstorm WarningOUNClay60 min
Apr 3, 9:48 AM CDTSpecial Weather StatementOUNClay27 min
Apr 3, 4:59 PM CDTSpecial Weather StatementOUNHardeman31 min
Apr 3, 5:35 PM CDTSpecial Weather StatementOUNHardeman25 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.