Alert archive / Oklahoma / Severe Thunderstorm Warnings in 2012

Severe Thunderstorm Warning 46, NWS Tulsa, OK

April 15, 2012Osage County, Pawnee County, Oklahoma

NWS Tulsa, OK issued this severe thunderstorm warning at Apr 15, 2012, 3:41 AM CDT for Osage County, Pawnee County, Oklahoma. It was in force for 64 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: Apr 15, 2012, 3:41 AM CDT (08:41 UTC)
Expired: Apr 15, 2012, 4:45 AM CDT
In force: 64 min
Issued by: NWS Tulsa, OK
Area: Storm-based polygon

Counties Osage County, OK, Pawnee County, OK

The radar

The Tulsa radar (KINX), 118 km from the middle of the area, began a volume at 08:43 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
Apr 15, 4:54 AM CDT	TSTM WND GST 58	3 Ene Pawnee, OK	OKLAHOMA MESONET

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 15, 1:37 AM CDT	Tornado Watch	SPC	5 hr

The nearest sounding before it

Lamont, OK (KLMN), launched 00:00Z, 8.7 hours before the alert went out and 63 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: 2195 J/kg
Mixed-layer CIN: -11 J/kg
Mixed-layer LCL: 863 m above ground
0-6 km bulk shear: 61 kt
0-1 km storm-relative helicity: 335 m²/s²
0-3 km storm-relative helicity: 436 m²/s²
Significant tornado parameter: 5.9
Supercell composite: 19.0

Open this sounding in Storm Lab

The text

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

508 
WUUS54 KTSA 150841
SVRTSA
OKC113-117-150945-
/O.NEW.KTSA.SV.W.0046.120415T0841Z-120415T0945Z/

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE TULSA OK
341 AM CDT SUN APR 15 2012

THE NATIONAL WEATHER SERVICE IN TULSA HAS ISSUED A

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

* UNTIL 445 AM CDT

* AT 337 AM CDT...SEVERE THUNDERSTORMS WERE LOCATED ALONG A LINE
  EXTENDING FROM 18 MILES WEST OF GRAINOLA TO 17 MILES WEST OF
  BURBANK TO 26 MILES WEST OF PAWNEE...MOVING EAST AT 45 MPH.

  STORM HAZARDS INCLUDE...
  WIND GUSTS TO 60 MPH...

* SOME LOCATIONS IN OR NEAR THE PATH OF THESE STORMS INCLUDE...
  BURBANK...GRAINOLA...SHIDLER...FAIRFAX...RALSTON...PAWNEE...
  FORAKER...SKEDEE...QUAY...PEARSONIA...MARAMEC...BLACKBURN...
  JENNINGS...HALLETT...PAWHUSKA...TERLTON...BIGHEART...CLEVELAND...
  WYNONA AND HOMINY.

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 3701 9609 3676 9619 3616 9650 3615 9682
      3624 9682 3624 9692 3633 9693 3633 9704
      3651 9704 3656 9691 3658 9690 3659 9705
      3668 9707 3670 9704 3669 9695 3675 9689
      3675 9683 3679 9676 3701 9674
TIME...MOT...LOC 0841Z 259DEG 37KT 3700 9691 3664 9698
          3622 9720

$$

1 follow-up statement

402 
WWUS54 KTSA 150907
SVSTSA

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE TULSA OK
407 AM CDT SUN APR 15 2012

OKC113-117-150945-
/O.CON.KTSA.SV.W.0046.000000T0000Z-120415T0945Z/
OSAGE OK-PAWNEE OK-
407 AM CDT SUN APR 15 2012

...SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 445 AM CDT FOR
PAWNEE AND OSAGE COUNTIES...

AT 400 AM CDT...SEVERE THUNDERSTORMS WERE LOCATED ALONG A LINE
EXTENDING FROM GRAINOLA TO BURBANK TO 14 MILES WEST OF PAWNEE...
MOVING EAST AT 45 MPH.

STORM HAZARDS INCLUDE...
WIND GUSTS TO 60 MPH...

SOME LOCATIONS IN OR NEAR THE PATH OF THIS STORM INCLUDE...FORAKER...
FAIRFAX...PAWNEE...QUAY...RALSTON...MARAMEC...PEARSONIA...SKEDEE...
JENNINGS...HALLETT...BLACKBURN...TERLTON...CLEVELAND...BIGHEART...
WYNONA...HOMINY AND PAWHUSKA.

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 3701 9611 3676 9619 3616 9650 3615 9682
      3624 9682 3624 9692 3633 9693 3633 9704
      3651 9704 3656 9691 3658 9690 3659 9705
      3668 9707 3670 9704 3669 9695 3675 9690
      3675 9683 3679 9676 3701 9674
TIME...MOT...LOC 0907Z 248DEG 38KT 3702 9662 3671 9668
          3634 9697

$$

The office that day

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

Issued	Product	Office	Counties	Lasted
Apr 15, 12:40 AM CDT	Wind Advisory	TSA	Creek, Okfuskee, Okmulgee, Pawnee, Tulsa, Washington	3 hr
Apr 15, 4:43 AM CDT	Severe Thunderstorm Warning	TSA	Creek, Osage, Pawnee	62 min
Apr 15, 5:05 AM CDT	Special Weather Statement	TSA	Creek	55 min
Apr 15, 5:30 AM CDT	Severe Thunderstorm Warning	TSA	Creek, Nowata, Osage, Pawnee, Rogers, Tulsa and 1 more	60 min
Apr 15, 5:47 AM CDT	Special Weather Statement	TSA	Okfuskee, Okmulgee, Rogers, Tulsa	58 min
Apr 15, 5:51 AM CDT	Tornado Warning	TSA	Nowata, Osage, Rogers, Tulsa, Washington	24 min
Apr 15, 6:22 AM CDT	Severe Thunderstorm Warning	TSA	Craig, Mayes, Nowata, Ottawa, Rogers	53 min
Apr 15, 6:41 AM CDT	Special Weather Statement	TSA	Mayes, Okmulgee, Wagoner	64 min
Apr 15, 6:43 AM CDT	Special Weather Statement	TSA	McIntosh, Pittsburg	62 min
Apr 15, 7:41 AM CDT	Special Weather Statement	TSA	Delaware	34 min
Apr 15, 7:44 AM CDT	Special Weather Statement	TSA	McIntosh, Muskogee, Pittsburg, Wagoner	31 min
Apr 15, 8:13 AM CDT	Special Weather Statement	TSA	Cherokee, Delaware, Muskogee	62 min
Apr 15, 8:14 AM CDT	Special Weather Statement	TSA	Haskell, Latimer, Pittsburg, Pushmataha, Sequoyah	61 min
Apr 15, 9:13 AM CDT	Severe Thunderstorm Warning	TSA	Adair, Cherokee, Muskogee	62 min
Apr 15, 9:16 AM CDT	Tornado Warning	TSA	Adair, Cherokee	29 min
Apr 15, 9:42 AM CDT	Tornado Warning	TSA	Adair	33 min
Apr 15, 11:28 AM CDT	Special Weather Statement	TSA	LeFlore	62 min
Apr 15, 12:42 PM CDT	River Flood Warning	TSA	Rogers, Tulsa	7 hr

Nearby

Severe Thunderstorm Warnings in Oklahoma, 2012 Every severe thunderstorm warning 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; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.