Alert archive / Oklahoma / Special Weather Statements in 2012

Special Weather Statement, NWS Tulsa, OK

February 20, 2012Osage County, Pawnee County, Washington County, Oklahoma

NWS Tulsa, OK issued this special weather statement at Feb 20, 2012, 4:55 PM CST for Osage County, Pawnee County, Washington County, Oklahoma. It was in force for 50 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
Feb 20, 2012, 4:55 PM CST (22:55 UTC)
Expired
Feb 20, 2012, 5:45 PM CST
In force
50 min
Issued by
NWS Tulsa, OK

Counties Osage County, OK, Pawnee County, OK, Washington County, OK

The radar

The Tulsa radar (KINX), 97 km from the middle of the area, began a volume at 22:59 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 12:00Z, 10.9 hours before the alert went out and 97 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 12:00Z on 2012-02-20Temperature 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 12:00Z on 2012-02-20The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 430 square meters per square second.1939587897117Sfc1 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
887 m above ground
0-6 km bulk shear
56 kt
0-1 km storm-relative helicity
430 m²/s²
0-3 km storm-relative helicity
464 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

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 Tulsa, OK wrote its last area forecast discussion before this special weather statement went out at Feb 20, 3:37 PM CST, 1 hour 18 minutes earlier.

Area forecast discussion, Feb 20, 3:37 PM CST, 1 hour 18 minutes before
AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE TULSA OK
337 PM CST MON FEB 20 2012

.DISCUSSION...
STRONG SOUTHERLY WINDS CONTINUE TO BE COMMON ACROSS THE REGION
THIS AFTERNOON AHEAD OF A COLD FRONT MOVING ACROSS WESTERN
OKLAHOMA. SHOWERS AND THUNDERSTORMS HAVE ALSO DEVELOPED IN THE
VICINITY OF THE COLD FRONT. THESE SHOWERS AND STORMS WILL CONTINUE
TO DEVELOP AND PUSH EASTWARD WITH THE MOVEMENT OF THE FRONT. SMALL
SIZE HAIL AND STRONG WINDS WILL BE POSSIBLE WITHIN THE THUNDERSTORM
DEVELOPMENT. MARGINAL INSTABILITY AHEAD OF THE FRONT ALONG WITH
STEEP LAPSE RATES WILL ALLOW FOR A CHANCE OF SEVERE WEATHER
THROUGH THE EVENING HOURS...WITH LARGE HAIL AND DAMAGING WINDS
BEING THE MAIN THREATS. A SEVERE THUNDERSTORM WATCH HAS BEEN
ISSUED FOR COUNTIES WEST OF HIGHWAY 75 IN NORTHEAST OKLAHOMA UNTIL
10 PM CST. STRONG TO GUSTY WINDS WILL CONTINUE TO BE CAPABLE FOR A
COUPLE HOURS BEHIND THE FRONTAL PASSAGE THIS EVENING...THUS HAVE
EXTENDED THE WIND ADVISORY UNTIL 9 PM CST.

THE COLD FRONT IS EXPECTED TO CLEAR THE REGION LATE TONIGHT WITH
PRECIP ENDING FROM WEST TO EAST LATE THIS EVENING FOR EASTERN
OKLAHOMA AND INTO THE OVERNIGHT HOURS FOR FAR NORTHWEST ARKANSAS.
TEMPS ARE EXPECTED TO QUICKLY REBOUND BEHIND THE COLD FRONT
TOMORROW...WARMING ABOVE NORMAL AND CONTINUING INTO THURSDAY AHEAD
OF THE NEXT WAVE MOVING ACROSS THE PLAINS. LATEST MODEL RUNS ARE
CONTINUING TO KEEP MOST OF THE MOISTURE TO THE EAST AND SOUTHEAST
OF THE REGION...THUS FOR NOW WILL KEEP THINGS DRY THURSDAY AS A
FRONTAL BOUNDARY PUSHES THROUGH. BEHIND THIS NEXT FRONTAL
BOUNDARY...TEMPS LOOK TO BECOME MORE CLOSER TO SEASONAL NORMALS
FRIDAY/SATURDAY.

IN THE EXTENDED FORECAST...MODELS CONTINUE TO DISAGREE ON THE
TIMING/STRENGHT/LOCATION OF A WAVE MOVING ACROSS THE WESTERN CONUS
AND INTO THE PLAINS LATE WEEKEND AND FIRST PART OF NEXT WEEK. THE
GFS SOLUTION BRINGS A COLD FRONT THROUGH SUNDAY NIGHT WHILE THE
ECMWF HOLDS OFF THE FRONT UNTIL THE MONDAY/TUESDAY TIME FRAME.
WILL SIDE WITH PREVIOUS FORECAST AND USE THE ECMWF FOR DETAILS.
WILL CARRY SLIGHT POPS FOR NOW MONDAY AND TUESDAY UNTIL MODEL
CONSISTENCY AND FORECASTER CONFIDENCE IMPROVES.

&&

.PRELIMINARY POINT TEMPS/POPS...
TUL   34  63  39  68 /  50   0   0   0
FSM   35  63  40  70 /  60   0  10  10
MLC   34  65  44  70 /  40   0   0   0
BVO   30  62  30  69 /  50   0   0   0
FYV   34  59  36  67 /  70   0   0   0
BYV   35  59  37  66 /  70   0   0   0
MKO   34  63  38  69 /  50   0   0   0
MIO   33  60  36  67 /  70   0   0   0
F10   35  65  40  70 /  40   0   0   0
HHW   36  66  46  71 /  40   0  10  10

&&

.TSA WATCHES/WARNINGS/ADVISORIES...
OK...WIND ADVISORY UNTIL 9 PM MONDAY FOR OKZ054-OKZ055-OKZ056-OKZ057-
     OKZ058-OKZ059-OKZ060-OKZ061-OKZ062-OKZ063-OKZ064-OKZ065-
     OKZ066-OKZ067-OKZ068-OKZ069-OKZ070-OKZ071-OKZ073.

AR...WIND ADVISORY UNTIL 9 PM MONDAY FOR ARZ001-ARZ010.

&&

SHORT TERM...21
LONG TERM....20
Hazardous weather outlook, Feb 20, 4:43 PM CST, 12 minutes before
HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE TULSA OK
443 PM CST MON FEB 20 2012

ARZ001-002-010-011-019-020-029-OKZ049-053>076-211100-
ADAIR OK-BENTON AR-CARROLL AR-CHEROKEE OK-CHOCTAW OK-CRAIG OK-
CRAWFORD AR-CREEK OK-DELAWARE OK-FRANKLIN AR-HASKELL OK-LATIMER OK-
LE FLORE OK-MADISON AR-MAYES OK-MCINTOSH OK-MUSKOGEE OK-NOWATA OK-
OKFUSKEE OK-OKMULGEE OK-OSAGE OK-OTTAWA OK-PAWNEE OK-PITTSBURG OK-
PUSHMATAHA OK-ROGERS OK-SEBASTIAN AR-SEQUOYAH OK-TULSA OK-WAGONER OK-
WASHINGTON OK-WASHINGTON AR-
440 PM CST MON FEB 20 2012

..SEVERE WEATHER POTENTIAL THROUGH MID EVENING...

THIS OUTLOOK IS FOR NORTHWEST AND WEST CENTRAL ARKANSAS AS WELL AS
MUCH OF EASTERN OKLAHOMA.

.DAY ONE...TODAY AND TONIGHT.
SEVERE THUNDERSTORM.
	RISK...ELEVATED.
	AREA...GENERALLY FROM AROUND HIGHWAY 75 WEST IN EASTERN OKLAHOMA.
	ONSET...ONGOING.

SIGNIFICANT WINDS.
	RISK...ELEVATED.
	AREA...EASTERN OKLAHOMA AND NORTHWEST ARKANSAS.
	ONSET...ONGOING.

FIRE WEATHER DANGER.
	RISK...ELEVATED.
	AREA...EASTERN OKLAHOMA AND NORTHWEST ARKANSAS.
	ONSET...ONGOING.

DISCUSSION...
A STRONG WIND DRIVEN STORM SYSTEM AND ASSOCIATED COLD FRONT
WILL SWEEP THROUGH THE REGION THIS EVENING. SURFACE WINDS
WITH THIS SYSTEM WILL BE CAPABLE OF REACHING 40 TO 45 MILES
AN HOUR. THUNDERSTORMS WITHIN THIS SYSTEM WILL BE CAPABLE
OF DAMAGING WINDS OF 50 MILES AN HOUR OR GREATER ALONG WITH
WIND DRIVEN HAIL. INSTABILITY AND THUNDERSTORM INTENSITY WILL
LESSEN ABOUT MID EVENING.

SPOTTER AND EMERGENCY MANAGEMENT ACTION STATEMENT...
ACTIVATION OF THE REGIONAL SPOTTER NETWORK LIKELY.

.DAYS TWO THROUGH SEVEN...TUESDAY THROUGH SUNDAY.
TUESDAY...NO HAZARDS.
WEDNESDAY...NO HAZARDS.
THURSDAY...NO HAZARDS.
FRIDAY...NO HAZARDS.
SATURDAY...NO HAZARDS.
SUNDAY...VERY HIGH FIRE WEATHER POTENTIAL...HIGH WIND POTENTIAL.

EXTENDED DISCUSSION...
DRY AND MILD WEATHER WILL PREVAIL FOR MUCH OF THE WEEK...WITH
THE NEXT COLD FRONT AND STRONGER WINDS ARRIVING TOWARD THE
BEGINNING OF NEXT WEEK.

WWW.SRH.NOAA.GOV/TULSA CONTAINS ADDITIONAL INFORMATION.

In the hours before

Special weather statement, Feb 20, 3:54 PM CST, 1 hour 1 minute before
SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE TULSA OK
354 PM CST MON FEB 20 2012

OKZ054-059-060-064>066-202300-
CREEK OK-OKFUSKEE OK-OKMULGEE OK-OSAGE OK-PAWNEE OK-TULSA OK-
354 PM CST MON FEB 20 2012

...SIGNIFICANT WEATHER ADVISORY...

THE NATIONAL WEATHER SERVICE IN TULSA HAS ISSUED A
SIGNIFICANT WEATHER ADVISORY EFFECTIVE UNTIL 500 PM CST
FOR THE FOLLOWING COUNTIES...

IN NORTHEAST OKLAHOMA
     CREEK...WESTERN OKMULGEE...OSAGE...PAWNEE AND SOUTHWESTERN TULSA

IN EAST CENTRAL OKLAHOMA
     OKFUSKEE

AT 345 PM CST...A LINE OF STRONG THUNDERSTORMS WAS LOCATED  VERY
CLOSE TO INTERSTATE 35 FROM THE KANSAS BORDER...SOUTH TO OKLAHOMA
CITY. THIS LINE OF STORMS WAS MOVING EAST BETWEEN 40 AND 45 MILES
AN HOUR.

LOCATIONS IN OR NEAR THE PATH OF THESE STORMS INCLUDE...OSAGE PAWNEE
CREEK AND OKFUSKEE COUNTIES.

THE STORMS WILL REACH FAR WESTERN OSAGE AND PAWNEE COUNTIES AROUND
415 PM AND FAR WESTERN CREEK AND OKFUSKEE COUNTIES AROUND 430 PM.
THE STORMS WILL LIKELY REACH ABOUT TO STATE HIGHWAY 75 BETWEEN 520
AND 540 PM.

STRONG SURFACE WINDS ARE ALREADY GUSTING TO AROUND 40 MILES AN HOUR
BEFORE THE STORMS ARRIVE. THE ADDITION OF THUNDERSTORMS WILL MAKE
GUST TO AROUND 50 MILES AN HOUR OR MORE LIKELY. SMALL WIND DRIVEN
HAIL IS ALSO LIKELY.

SHOULD THE THUNDERSTORMS INCREASE IN INTENSITY WARNINGS WILL
BE NECESSARY.

REMAIN ALERT IN CASE THE SIGNIFICANT WEATHER ADVISORY IS UPGRADED TO
A WARNING.

LAT...LON 3700 9602 3528 9604 3529 9645 3545 9645
      3545 9655 3539 9654 3540 9663 3615 9663
      3615 9682 3624 9682 3624 9692 3633 9693
      3633 9704 3651 9704 3658 9690 3659 9705
      3668 9707 3669 9695 3679 9676 3701 9675
TIME...MOT...LOC 2145Z 269DEG 39KT 3703 9733 3505 9739
Special weather statement, Feb 20, 4:55 PM CST, 0 minutes before
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The office that day

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

IssuedProductOfficeCountiesLasted
Feb 20, 4:02 AM CSTWind AdvisoryTSAAdair, Cherokee, Craig, Creek, Delaware, McIntosh and 12 more17 hr
Feb 20, 3:54 PM CSTSpecial Weather StatementTSACreek, Okfuskee, Osage, Pawnee66 min
Feb 20, 4:32 PM CSTSevere Thunderstorm WarningTSAOsage28 min
Feb 20, 4:50 PM CSTSevere Thunderstorm WarningTSACreek, Okfuskee, Okmulgee, Osage, Pawnee, Tulsa40 min
Feb 20, 5:31 PM CSTSpecial Weather StatementTSAMcIntosh, Okfuskee, Okmulgee, Rogers, Tulsa, Wagoner59 min
Feb 20, 5:45 PM CSTSpecial Weather StatementTSACraig, Nowata, Washington45 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.