Alert archive / Oklahoma / Severe Thunderstorm Warnings in 2011

Severe Thunderstorm Warning 37, NWS Tulsa, OK

April 9, 2011Osage County, Pawnee County, Oklahoma

NWS Tulsa, OK issued this severe thunderstorm warning at Apr 9, 2011, 12:16 AM CDT for Osage County, Pawnee County, Oklahoma. It was in force for 59 min. 3 reports 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: Apr 9, 2011, 12:16 AM CDT (05:16 UTC)
Expired: Apr 9, 2011, 1:15 AM CDT
In force: 59 min
Issued by: NWS Tulsa, OK
Area: Storm-based polygon

Counties Osage County, OK, Pawnee County, OK

The radar

The Tulsa radar (KINX), 84 km from the middle of the area, began a volume at 05:19 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
Apr 9, 12:40 AM CDT	HAIL 1.25	1 W Pawhuska, OK
Apr 9, 12:44 AM CDT	HAIL 1.25	Pawhuska, OK
Apr 9, 12:54 AM CDT	HAIL 1	Pawhuska, OK

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
Apr 8, 5:35 PM CDT	Tornado Watch	SPC	9 hr

The nearest sounding before it

Lamont, OK (KLMN), launched 00:00Z, 5.3 hours before the alert went out and 108 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: 3252 m above ground
0-6 km bulk shear: 61 kt
0-1 km storm-relative helicity: -13 m²/s²
0-3 km storm-relative helicity: 80 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.

808 
WUUS54 KTSA 090516
SVRTSA
OKC113-117-090615-
/O.NEW.KTSA.SV.W.0037.110409T0516Z-110409T0615Z/

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE TULSA OK
1216 AM CDT SAT APR 9 2011

THE NATIONAL WEATHER SERVICE IN TULSA HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  CENTRAL OSAGE COUNTY IN NORTHEAST OKLAHOMA
  PAWNEE COUNTY IN NORTHEAST OKLAHOMA

* UNTIL 115 AM CDT

* AT 1211 AM CDT...SEVERE THUNDERSTORMS WERE LOCATED ALONG A LINE
  EXTENDING FROM 4 MILES WEST OF PEARSONIA TO FAIRFAX...MOVING EAST
  AT 30 MPH.

  STORM HAZARDS INCLUDE...
  DAMAGING GOLF BALL SIZE HAIL...
  DAMAGING WIND GUSTS TO 70 MPH...

* SOME LOCATIONS IN OR NEAR THE PATH OF THESE STORMS INCLUDE...
  PEARSONIA...PAWHUSKA...WYNONA...HOMINY...OKESA AND BARNSDALL.

THIS WARNING REPLACES THE PREVIOUS WARNINGS WHICH WERE IN EFFECT FOR 
PAWNEE AND OSAGE COUNTIES.

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 3676 9601 3674 9601 3630 9625 3653 9681
      3690 9654
TIME...MOT...LOC 0515Z 289DEG 27KT 3678 9650 3655 9670

$$

LACY

2 follow-up statements

359 
WWUS54 KTSA 090533
SVSTSA

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE TULSA OK
1233 AM CDT SAT APR 9 2011

OKC113-117-090615-
/O.CON.KTSA.SV.W.0037.000000T0000Z-110409T0615Z/
OSAGE OK-PAWNEE OK-
1233 AM CDT SAT APR 9 2011

...SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 115 AM CDT FOR
PAWNEE AND CENTRAL OSAGE COUNTIES...

AT 1231 AM CDT...SEVERE THUNDERSTORMS WERE LOCATED ALONG A LINE
EXTENDING FROM PAWHUSKA TO 9 MILES SOUTHEAST OF FAIRFAX...MOVING EAST
AT 30 MPH.

STORM HAZARDS INCLUDE...
DAMAGING GOLF BALL SIZE HAIL...
DAMAGING WIND GUSTS TO 70 MPH...

SOME LOCATIONS IN OR NEAR THE PATH OF THIS STORM INCLUDE...
PAWHUSKA...WYNONA...PERSHING...NELAGONEY...HOMINY...OKESA...TALLANT
AND BARNSDALL.

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 3676 9601 3674 9601 3630 9625 3653 9681
      3690 9654
TIME...MOT...LOC 0533Z 289DEG 27KT 3673 9634 3650 9654

$$

LACY

423 
WWUS54 KTSA 090543
SVSTSA

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE TULSA OK
1243 AM CDT SAT APR 9 2011

OKC117-090553-
/O.CAN.KTSA.SV.W.0037.000000T0000Z-110409T0615Z/
PAWNEE OK-
1243 AM CDT SAT APR 9 2011

...THE SEVERE THUNDERSTORM WARNING FOR PAWNEE COUNTY IS CANCELLED...

LAT...LON 3643 9656 3684 9630 3676 9601 3674 9601
      3630 9625
TIME...MOT...LOC 0543Z 289DEG 27KT 3674 9628 3648 9646

$$

OKC113-090615-
/O.CON.KTSA.SV.W.0037.000000T0000Z-110409T0615Z/
OSAGE OK-
1243 AM CDT SAT APR 9 2011

...SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 115 AM CDT FOR
EASTERN OSAGE COUNTY...

AT 1240 AM CDT...SEVERE THUNDERSTORMS WERE LOCATED ALONG A LINE
EXTENDING FROM PAWHUSKA TO 7 MILES NORTHWEST OF HOMINY...MOVING EAST
AT 30 MPH.

STORM HAZARDS INCLUDE...
DAMAGING GOLF BALL SIZE HAIL...
WIND GUSTS TO 60 MPH...

SOME LOCATIONS IN OR NEAR THE PATH OF THIS STORM INCLUDE...WYNONA...
PERSHING...HOMINY...NELAGONEY...OKESA...TALLANT AND BARNSDALL.

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 3643 9656 3684 9630 3676 9601 3674 9601
      3630 9625
TIME...MOT...LOC 0543Z 289DEG 27KT 3674 9628 3648 9646

$$

LACY

The office that day

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

Issued	Product	Office	Counties	Lasted
Apr 8, 7:08 PM CDT	Severe Thunderstorm Warning	TSA	Osage	34 min
Apr 8, 7:44 PM CDT	Special Weather Statement	TSA	Kay	31 min
Apr 8, 11:13 PM CDT	Severe Thunderstorm Warning	TSA	Osage	62 min
Apr 8, 11:26 PM CDT	Tornado Warning	TSA	Osage	34 min
Apr 8, 11:53 PM CDT	Severe Thunderstorm Warning	TSA	Osage, Pawnee	22 min
Apr 9, 1:06 AM CDT	Severe Thunderstorm Warning	TSA	Osage, Tulsa, Washington	39 min
Apr 9, 1:08 AM CDT	Special Weather Statement	TSA	Washington	37 min
Apr 9, 1:21 AM CDT	Special Weather Statement	TSA	Nowata	54 min
Apr 9, 1:31 AM CDT	Severe Thunderstorm Warning	TSA	Rogers	59 min
Apr 9, 1:39 AM CDT	Severe Thunderstorm Warning	TSA	Craig, Nowata	41 min
Apr 9, 1:55 AM CDT	Special Weather Statement	TSA	Washington	50 min
Apr 9, 2:10 AM CDT	Severe Thunderstorm Warning	TSA	Craig, Mayes, Rogers	50 min
Apr 9, 2:14 AM CDT	Special Weather Statement	TSA	Nowata	46 min
Apr 9, 2:30 AM CDT	Special Weather Statement	TSA	Craig, Ottawa	60 min
Apr 9, 2:34 AM CDT	Severe Thunderstorm Warning	TSA	Craig, Nowata, Rogers	23 min
Apr 9, 2:56 AM CDT	Severe Thunderstorm Warning	TSA	Delaware	30 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.