Alert archive / Oklahoma / Severe Thunderstorm Warnings in 2011

Severe Thunderstorm Warning 55, NWS Tulsa, OK

April 10, 2011Latimer County, Pittsburg County, Oklahoma

NWS Tulsa, OK issued this severe thunderstorm warning at Apr 10, 2011, 11:45 PM CDT for Latimer County, Pittsburg County, Oklahoma. It was in force for 45 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 10, 2011, 11:45 PM CDT (04:45 UTC)
Expired: Apr 11, 2011, 12:30 AM CDT
In force: 45 min
Issued by: NWS Tulsa, OK
Area: Storm-based polygon

Counties Latimer County, OK, Pittsburg County, OK

The radar

The Western Arkansas radar (KSRX), 120 km from the middle of the area, began a volume at 04:48 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 watch it was issued in

The SPC watch in force over the same counties when this warning went out.

Issued	Product	Office	Lasted
Apr 10, 7:28 PM CDT	Tornado Watch	SPC	8 hr

The nearest sounding before it

Norman, OK (KOUN), launched 00:00Z, 4.8 hours before the alert went out and 182 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: 0 J/kg
Mixed-layer CIN: No buoyant parcel
Mixed-layer LCL: 3641 m above ground
0-6 km bulk shear: 75 kt
0-1 km storm-relative helicity: 36 m²/s²
0-3 km storm-relative helicity: 279 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.

889 
WUUS54 KTSA 110445
SVRTSA
OKC077-121-110530-
/O.NEW.KTSA.SV.W.0055.110411T0445Z-110411T0530Z/

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE TULSA OK
1145 PM CDT SUN APR 10 2011

THE NATIONAL WEATHER SERVICE IN TULSA HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  LATIMER COUNTY IN SOUTHEAST OKLAHOMA
  SOUTHEASTERN PITTSBURG COUNTY IN SOUTHEAST OKLAHOMA

* UNTIL 1230 AM CDT

* AT 1144 PM CDT...A SEVERE THUNDERSTORM WAS LOCATED 13 MILES
  SOUTHWEST OF HARTSHORNE...MOVING NORTHEAST AT 45 MPH.

  STORM HAZARDS INCLUDE...
  HALF DOLLAR SIZE HAIL...
  WIND GUSTS TO 60 MPH...

* SOME LOCATIONS IN OR NEAR THE PATH OF THIS STORM INCLUDE...
  HARTSHORNE...HIGGINS...DAMON AND WILBURTON.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A TORNADO WATCH IS IN EFFECT FOR THE WARNED AREA. TORNADOES CAN
DEVELOP SUDDENLY FROM SEVERE THUNDERSTORMS. IF YOU ARE NEAR THE PATH
OF THIS STORM...BE ALERT FOR RAPIDLY CHANGING WEATHER CONDITIONS.
TAKE COVER ON THE LOWEST FLOOR IN AN INTERIOR ROOM AND STAY AWAY FROM
WINDOWS.

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

&&

LAT...LON 3461 9564 3470 9574 3510 9540 3487 9505
      3469 9546 3469 9551 3466 9552
TIME...MOT...LOC 0445Z 228DEG 40KT 3468 9565

$$

LACY

2 follow-up statements

145 
WWUS54 KTSA 110508
SVSTSA

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE TULSA OK
1208 AM CDT MON APR 11 2011

OKC121-110518-
/O.CAN.KTSA.SV.W.0055.000000T0000Z-110411T0530Z/
PITTSBURG OK-
1208 AM CDT MON APR 11 2011

...THE SEVERE THUNDERSTORM WARNING FOR SOUTHEASTERN PITTSBURG COUNTY
IS CANCELLED...

LAT...LON 3494 9550 3504 9540 3504 9535 3506 9535
      3487 9505 3468 9549 3469 9550
TIME...MOT...LOC 0508Z 226DEG 41KT 3487 9544

$$

OKC077-110530-
/O.CON.KTSA.SV.W.0055.000000T0000Z-110411T0530Z/
LATIMER OK-
1208 AM CDT MON APR 11 2011

...SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 1230 AM CDT
FOR LATIMER COUNTY...

AT 1205 AM CDT...A SEVERE THUNDERSTORM WAS LOCATED NEAR GOWEN...
MOVING NORTHEAST AT 45 MPH.

STORM HAZARDS INCLUDE...
QUARTER SIZE HAIL...
WIND GUSTS TO 60 MPH...

SOME LOCATIONS IN OR NEAR THE PATH OF THIS STORM INCLUDE...DAMON...
WILBURTON AND PANOLA.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A TORNADO WATCH IS IN EFFECT FOR THE WARNED AREA. TORNADOES CAN
DEVELOP SUDDENLY FROM SEVERE THUNDERSTORMS. IF YOU ARE NEAR THE PATH
OF THIS STORM...YOU SHOULD BE ALERT FOR RAPIDLY CHANGING WEATHER
CONDITIONS AND BE READY TO ACT QUICKLY.

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

&&

LAT...LON 3494 9550 3504 9540 3504 9535 3506 9535
      3487 9505 3468 9549 3469 9550
TIME...MOT...LOC 0508Z 226DEG 41KT 3487 9544

$$

714 
WWUS54 KTSA 110528
SVSTSA

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE TULSA OK
1228 AM CDT MON APR 11 2011

OKC077-110538-
/O.EXP.KTSA.SV.W.0055.000000T0000Z-110411T0530Z/
LATIMER OK-
1228 AM CDT MON APR 11 2011

...THE SEVERE THUNDERSTORM WARNING FOR LATIMER COUNTY EXPIRES AT 1230
AM CDT...

THE THUNDERSTORM HAS MOVED OUT OF THE WARNED AREA AND WEAKENED BELOW
SEVERE LIMITS...THEREFORE THE SEVERE THUNDERSTORM WARNING WILL BE
ALLOWED TO EXPIRE.

GUSTY WINDS...SMALL HAIL AND HEAVY RAIN WILL STILL BE POSSIBLE WITH
THIS STORM.

A TORNADO WATCH REMAINS IN EFFECT UNTIL 3 AM.

LAT...LON 3494 9550 3504 9540 3504 9535 3506 9535
      3487 9505 3468 9549 3469 9550
TIME...MOT...LOC 0528Z 226DEG 41KT 3503 9524

$$

The office that day

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

Issued	Product	Office	Counties	Lasted
Apr 10, 8:10 PM CDT	Special Weather Statement	TSA	Delaware	35 min
Apr 10, 8:53 PM CDT	Special Weather Statement	TSA	Wagoner	37 min
Apr 10, 9:35 PM CDT	Special Weather Statement	TSA	Delaware, Mayes	25 min
Apr 10, 9:39 PM CDT	Severe Thunderstorm Warning	TSA	Cherokee, Delaware, Mayes, Wagoner	22 min
Apr 10, 9:49 PM CDT	Severe Thunderstorm Warning	TSA	Haskell, McIntosh, Pittsburg	41 min
Apr 10, 10:14 PM CDT	Special Weather Statement	TSA	Adair	46 min
Apr 10, 10:24 PM CDT	Severe Thunderstorm Warning	TSA	Adair	51 min
Apr 10, 10:41 PM CDT	Severe Thunderstorm Warning	TSA	Muskogee, Sequoyah	34 min
Apr 10, 10:48 PM CDT	Special Weather Statement	TSA	Pittsburg	42 min
Apr 10, 11:00 PM CDT	Severe Thunderstorm Warning	TSA	McIntosh, Muskogee	30 min
Apr 10, 11:14 PM CDT	Severe Thunderstorm Warning	TSA	Adair, Cherokee, Sequoyah	31 min
Apr 10, 11:22 PM CDT	Special Weather Statement	TSA	Latimer	23 min
Apr 10, 11:40 PM CDT	Special Weather Statement	TSA	Pittsburg	50 min
Apr 10, 11:44 PM CDT	Severe Thunderstorm Warning	TSA	Adair, Sequoyah	46 min
Apr 11, 12:16 AM CDT	Special Weather Statement	TSA	Sequoyah	29 min
Apr 11, 12:27 AM CDT	Severe Thunderstorm Warning	TSA	Adair, Sequoyah	22 min
Apr 11, 1:48 AM CDT	Severe Thunderstorm Warning	TSA	Choctaw, Pushmataha	57 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.