Alert archive / Oklahoma / Severe Thunderstorm Warnings in 2011

Severe Thunderstorm Warning 481, NWS Tulsa, OK

August 7, 2011Pittsburg County, Oklahoma

NWS Tulsa, OK issued this severe thunderstorm warning at Aug 7, 2011, 4:02 PM CDT for Pittsburg County, Oklahoma. It was in force for 43 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 7, 2011, 4:02 PM CDT (21:02 UTC)
Expired: Aug 7, 2011, 4:45 PM CDT
In force: 43 min
Issued by: NWS Tulsa, OK
Area: Storm-based polygon

County Pittsburg County, OK

The radar

The Western Arkansas radar (KSRX), 131 km from the middle of the area, began a volume at 21:04 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, 9.0 hours before the alert went out and 155 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-p

Temperature in red, dew point in green, the mixed-layer parcel dashed.

Hodograph

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: 419 J/kg
Mixed-layer CIN: -300 J/kg
Mixed-layer LCL: 2188 m above ground
0-6 km bulk shear: 13 kt
0-1 km storm-relative helicity: -21 m²/s²
0-3 km storm-relative helicity: 54 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.

247 
WUUS54 KTSA 072102
SVRTSA
OKC121-072145-
/O.NEW.KTSA.SV.W.0481.110807T2102Z-110807T2145Z/

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE TULSA OK
402 PM CDT SUN AUG 7 2011

THE NATIONAL WEATHER SERVICE IN TULSA HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  CENTRAL PITTSBURG COUNTY IN SOUTHEAST OKLAHOMA

* UNTIL 445 PM CDT

* AT 400 PM CDT...A SEVERE THUNDERSTORM WAS LOCATED 3 MILES NORTHWEST
  OF SAVANNA...MOVING EAST AT 10 MPH.  ANOTHER STORM THAT COULD
  BECOME SEVERE WAS NEAR MCALESTER.

  STORM HAZARDS INCLUDE...
  WIND GUSTS TO 65 MPH...

* SOME LOCATIONS IN OR NEAR THE PATH OF THIS STORM INCLUDE...
  SAVANNA...MCALESTER...KREBS AND ALDERSON.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

SEEK SHELTER IMMEDIATELY INSIDE A STURDY STRUCTURE AND STAY AWAY 
FROM WINDOWS. MOBILE HOMES AND HIGH PROFILE VEHICLES ARE ESPECIALLY 
SUSCEPTIBLE TO HIGH WINDS AND MAY BE OVERTURNED.

&&

LAT...LON 3502 9556 3475 9559 3480 9599 3504 9596
TIME...MOT...LOC 2102Z 279DEG 9KT 3487 9587

$$

2 follow-up statements

871 
WWUS54 KTSA 072126
SVSTSA

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE TULSA OK
426 PM CDT SUN AUG 7 2011

OKC121-072145-
/O.CON.KTSA.SV.W.0481.000000T0000Z-110807T2145Z/
PITTSBURG OK-
426 PM CDT SUN AUG 7 2011

...SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 445 PM CDT FOR
CENTRAL PITTSBURG COUNTY...

AT 421 PM CDT...A SEVERE THUNDERSTORM WAS LOCATED NEAR 
SAVANNA...MOVING EAST AT 5 TO 10 MPH.

STORM HAZARDS INCLUDE...
WIND GUSTS TO 65 MPH...

SOME LOCATIONS IN OR NEAR THE PATH OF THIS STORM INCLUDE...
MCALESTER...KREBS...ALDERSON...BACHE...DOW AND HAILEYVILLE.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

PEOPLE OUTSIDE SHOULD MOVE TO A SAFE SHELTER...PREFERABLY INSIDE A
STRONG BUILDING. STAY AWAY FROM WINDOWS UNTIL THE STORM HAS PASSED.

&&

LAT...LON 3502 9556 3475 9559 3480 9599 3504 9596
TIME...MOT...LOC 2126Z 272DEG 10KT 3487 9579

$$

938 
WWUS54 KTSA 072143
SVSTSA

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE TULSA OK
443 PM CDT SUN AUG 7 2011

OKC121-072153-
/O.EXP.KTSA.SV.W.0481.000000T0000Z-110807T2145Z/
PITTSBURG OK-
443 PM CDT SUN AUG 7 2011

...THE SEVERE THUNDERSTORM WARNING FOR CENTRAL PITTSBURG COUNTY
EXPIRES AT 445 PM CDT...

THE THUNDERSTORM HAS WEAKENED BELOW SEVERE LIMITS...THEREFORE THE
SEVERE THUNDERSTORM WARNING WILL BE ALLOWED TO EXPIRE.

GUSTY WINDS TO 45 MILES AN HOUR WILL STILL BE POSSIBLE WITH THIS 
STORM.

LAT...LON 3502 9556 3475 9559 3480 9599 3504 9596
TIME...MOT...LOC 2143Z 272DEG 10KT 3487 9573

$$

The office that day

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

Issued	Product	Office	Counties	Lasted
Aug 6, 7:02 PM CDT	Special Weather Statement	TSA	Tulsa	28 min
Aug 6, 7:05 PM CDT	Severe Thunderstorm Warning	TSA	Mayes, Rogers, Wagoner	40 min
Aug 6, 7:06 PM CDT	Special Weather Statement	TSA	Tulsa	39 min
Aug 6, 7:28 PM CDT	Special Weather Statement	TSA	Tulsa	32 min
Aug 6, 7:34 PM CDT	Severe Thunderstorm Warning	TSA	Rogers, Tulsa	20 min
Aug 6, 7:37 PM CDT	Special Weather Statement	TSA	Mayes	38 min
Aug 6, 8:22 PM CDT	Special Weather Statement	TSA	Craig, Nowata, Rogers	53 min
Aug 6, 8:36 PM CDT	Special Weather Statement	TSA	Pawnee	54 min
Aug 6, 9:10 PM CDT	Special Weather Statement	TSA	Craig, Delaware, Ottawa	65 min
Aug 7, 3:43 PM CDT	Special Weather Statement	TSA	Pittsburg	32 min
Aug 7, 3:45 PM CDT	Special Weather Statement	TSA	LeFlore	30 min
Aug 7, 5:06 PM CDT	Special Weather Statement	TSA	Pittsburg	24 min
Aug 7, 5:29 PM CDT	Special Weather Statement	TSA	Pushmataha	46 min
Aug 7, 5:42 PM CDT	Special Weather Statement	TSA	LeFlore	48 min
Aug 7, 5:52 PM CDT	Severe Thunderstorm Warning	TSA	Latimer, Pittsburg, Pushmataha	38 min

Nearby

Severe Thunderstorm Warnings in Oklahoma, 2011 Every severe thunderstorm warning in 2011

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.