Alert archive / Oklahoma / Severe Thunderstorm Warnings in 2011

Severe Thunderstorm Warning 261, NWS Tulsa, OK

May 12, 2011Pittsburg County, Oklahoma

NWS Tulsa, OK issued this severe thunderstorm warning at May 12, 2011, 4:04 PM CDT for Pittsburg County, Oklahoma. It was in force for 41 min. 1 report came from inside the area while it was in force.

The area

The outline as issued, with what was reported inside it.

The facts

Issued: May 12, 2011, 4:04 PM CDT (21:04 UTC)
Expired: May 12, 2011, 4:45 PM CDT
In force: 41 min
Issued by: NWS Tulsa, OK
Area: Storm-based polygon

County Pittsburg County, OK

The radar

The Norman radar (KTLX), 131 km from the middle of the area, began a volume at 21:06 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.

What was reported inside it

Time	Report	Where	Remark
May 12, 4:47 PM CDT	HAIL 0.88	Arpelar, OK	TIME ESTIMATED BY RADAR.

Local storm reports filed while the alert was in force, from inside its polygon or its counties.

The watch it was issued in

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

Issued	Product	Office	Lasted
May 12, 3:17 PM CDT	Severe Thunderstorm Watch	SPC	7 hr

The nearest sounding before it

Norman, OK (KOUN), launched 12:00Z, 9.1 hours before the alert went out and 138 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: 1116 J/kg
Mixed-layer CIN: -142 J/kg
Mixed-layer LCL: 682 m above ground
0-6 km bulk shear: 57 kt
0-1 km storm-relative helicity: 120 m²/s²
0-3 km storm-relative helicity: 58 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 1.1

Open this sounding in Storm Lab

The text

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

058 
WUUS54 KTSA 122104
SVRTSA
OKC121-122145-
/O.NEW.KTSA.SV.W.0261.110512T2104Z-110512T2145Z/

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE TULSA OK
404 PM CDT THU MAY 12 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 NEAR ASHLAND...
  MOVING NORTHEAST AT 30 MPH.

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

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

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 3499 9610 3515 9601 3515 9596 3495 9551
      3493 9551 3467 9601 3467 9606 3470 9610
TIME...MOT...LOC 2104Z 216DEG 27KT 3479 9606

$$

LACY

3 follow-up statements

456 
WWUS54 KTSA 122116
SVSTSA

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE TULSA OK
416 PM CDT THU MAY 12 2011

OKC121-122145-
/O.CON.KTSA.SV.W.0261.000000T0000Z-110512T2145Z/
PITTSBURG OK-
416 PM CDT THU MAY 12 2011

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

AT 413 PM CDT...A SEVERE THUNDERSTORM WAS LOCATED NEAR HAYWOOD...
MOVING NORTHEAST AT 30 MPH.

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

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

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 3477 9582 3474 9597 3473 9610 3499 9610
      3515 9601 3515 9596 3495 9551 3493 9551
TIME...MOT...LOC 2117Z 217DEG 28KT 3490 9596

$$

321 
WWUS54 KTSA 122131
SVSTSA

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE TULSA OK
431 PM CDT THU MAY 12 2011

OKC121-122145-
/O.CON.KTSA.SV.W.0261.000000T0000Z-110512T2145Z/
PITTSBURG OK-
431 PM CDT THU MAY 12 2011

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

AT 430 PM CDT...A SEVERE THUNDERSTORM WAS LOCATED NEAR ARPELAR...
MOVING NORTHEAST AT 30 MPH.

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

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

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 3477 9582 3474 9597 3473 9610 3499 9610
      3515 9601 3515 9596 3495 9551 3493 9551
TIME...MOT...LOC 2131Z 217DEG 28KT 3495 9596

$$

242 
WWUS54 KTSA 122142
SVSTSA

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE TULSA OK
442 PM CDT THU MAY 12 2011

OKC121-122153-
/O.EXP.KTSA.SV.W.0261.000000T0000Z-110512T2145Z/
PITTSBURG OK-
442 PM CDT THU MAY 12 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...SMALL HAIL AND HEAVY RAIN WILL STILL BE POSSIBLE WITH
THIS STORM.

LAT...LON 3477 9582 3474 9597 3473 9610 3499 9610
      3515 9601 3515 9596 3495 9551 3493 9551
TIME...MOT...LOC 2143Z 217DEG 28KT 3502 9589

$$

The office that day

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

Issued	Product	Office	Counties	Lasted
May 11, 7:12 PM CDT	Special Weather Statement	TSA	Ottawa	33 min
May 12, 3:55 PM CDT	Special Weather Statement	TSA	Pittsburg	35 min
May 12, 4:33 PM CDT	Special Weather Statement	TSA	Craig	42 min
May 12, 4:41 PM CDT	Severe Thunderstorm Warning	TSA	Craig	64 min
May 12, 4:44 PM CDT	Special Weather Statement	TSA	McIntosh, Pittsburg	61 min
May 12, 4:45 PM CDT	Special Weather Statement	TSA	Mayes	30 min
May 12, 4:50 PM CDT	Severe Thunderstorm Warning	TSA	Craig, Mayes, Rogers	40 min
May 12, 4:51 PM CDT	Severe Thunderstorm Warning	TSA	McIntosh, Pittsburg	39 min
May 12, 4:56 PM CDT	Areal Flood Advisory	TSA	McIntosh, Pittsburg	3 hr
May 12, 5:04 PM CDT	Special Weather Statement	TSA	Sequoyah	56 min
May 12, 5:08 PM CDT	Severe Thunderstorm Warning	TSA	Haskell, LeFlore, Sequoyah	52 min
May 12, 5:09 PM CDT	Special Weather Statement	TSA	Creek	51 min
May 12, 5:12 PM CDT	Severe Thunderstorm Warning	TSA	Creek, Okfuskee, Okmulgee	63 min
May 12, 5:15 PM CDT	Special Weather Statement	TSA	Adair	60 min
May 12, 5:17 PM CDT	Severe Thunderstorm Warning	TSA	McIntosh, Pittsburg	58 min
May 12, 5:24 PM CDT	Severe Thunderstorm Warning	TSA	Cherokee, Haskell, McIntosh, Muskogee, Sequoyah	51 min
May 12, 5:25 PM CDT	Severe Thunderstorm Warning	TSA	Craig, Delaware, Mayes, Ottawa	50 min
May 12, 5:27 PM CDT	Severe Thunderstorm Warning	TSA	McIntosh, Muskogee	48 min
May 12, 5:36 PM CDT	Severe Thunderstorm Warning	TSA	Craig, Ottawa	24 min
May 12, 5:44 PM CDT	Severe Thunderstorm Warning	TSA	Adair, Cherokee	46 min
May 12, 5:45 PM CDT	Severe Thunderstorm Warning	TSA	Haskell, McIntosh, Muskogee, Sequoyah	45 min
May 12, 5:56 PM CDT	Severe Thunderstorm Warning	TSA	Creek, Okmulgee, Tulsa, Wagoner	49 min
May 12, 5:56 PM CDT	Severe Thunderstorm Warning	TSA	Adair, Sequoyah	64 min
May 12, 6:00 PM CDT	Severe Thunderstorm Warning	TSA	Rogers, Tulsa, Wagoner	45 min
May 12, 6:07 PM CDT	Areal Flood Advisory	TSA	Haskell, McIntosh, Muskogee, Pittsburg, Sequoyah	3 hr
May 12, 6:07 PM CDT	Severe Thunderstorm Warning	TSA	Delaware, Ottawa	38 min
May 12, 6:11 PM CDT	Special Weather Statement	TSA	Atoka	34 min
May 12, 6:11 PM CDT	Severe Thunderstorm Warning	TSA	Adair, Cherokee, Haskell, LeFlore, Muskogee, Sequoyah	64 min
May 12, 6:14 PM CDT	Severe Thunderstorm Warning	TSA	Choctaw	31 min
May 12, 6:15 PM CDT	Severe Thunderstorm Warning	TSA	Cherokee, Mayes, Muskogee, Rogers, Tulsa, Wagoner	45 min
May 12, 6:23 PM CDT	Severe Thunderstorm Warning	TSA	Pushmataha	52 min
May 12, 6:37 PM CDT	Severe Thunderstorm Warning	TSA	Sequoyah	53 min
May 12, 6:39 PM CDT	Areal Flood Advisory	TSA	Adair, Cherokee, Haskell, LeFlore, Sequoyah	66 min
May 12, 6:41 PM CDT	Special Weather Statement	TSA	LeFlore	34 min
May 12, 6:47 PM CDT	Severe Thunderstorm Warning	TSA	Ottawa	28 min
May 12, 6:50 PM CDT	Severe Thunderstorm Warning	TSA	Choctaw, Pushmataha	24 min
May 12, 6:52 PM CDT	Severe Thunderstorm Warning	TSA	Adair	28 min
May 12, 6:54 PM CDT	Severe Thunderstorm Warning	TSA	LeFlore	36 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; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.