Alert archive / Oklahoma / Severe Thunderstorm Warnings in 2012

Severe Thunderstorm Warning 9, NWS Tulsa, OK

February 28, 2012Ottawa County, Oklahoma

NWS Tulsa, OK issued this severe thunderstorm warning at Feb 28, 2012, 11:44 PM CST for Ottawa County, Oklahoma. It was in force for 20 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: Feb 28, 2012, 11:44 PM CST (05:44 UTC)
Expired: Feb 29, 2012, 12:04 AM CST
In force: 20 min
Issued by: NWS Tulsa, OK
Area: Storm-based polygon

County Ottawa County, OK

The radar

The Tulsa radar (KINX), 104 km from the middle of the area, began a volume at 05:46 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
Feb 28, 11:50 PM CST	TSTM WND GST 60	Wyandotte, 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
Feb 28, 10:30 PM CST	Tornado Watch	SPC	6 hr

The nearest sounding before it

Springfield, MO (KSGF), launched 00:00Z, 5.7 hours before the alert went out and 83 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: 75 J/kg
Mixed-layer CIN: -196 J/kg
Mixed-layer LCL: 595 m above ground
0-6 km bulk shear: 76 kt
0-1 km storm-relative helicity: 482 m²/s²
0-3 km storm-relative helicity: 563 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 3.4

Open this sounding in Storm Lab

The text

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

617 
WUUS54 KTSA 290544
SVRTSA
OKC115-290615-
/O.NEW.KTSA.SV.W.0009.120229T0544Z-120229T0615Z/

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE TULSA OK
1144 PM CST TUE FEB 28 2012

THE NATIONAL WEATHER SERVICE IN TULSA HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  SOUTHERN OTTAWA COUNTY IN NORTHEAST OKLAHOMA

* UNTIL 1215 AM CST

* AT 1142 PM CST...SEVERE THUNDERSTORMS WERE LOCATED ALONG A LINE
  EXTENDING FROM 14 MILES NORTHEAST OF WYANDOTTE TO 5 MILES SOUTH OF
  AFTON...MOVING EAST AT 65 MPH.

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

* THIS STORM WILL OTHERWISE REMAIN OVER MAINLY RURAL AREAS.

THIS INCLUDES INTERSTATE 44 BETWEEN MILE MARKERS 298 AND 299.

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 3697 9460 3669 9461 3667 9493 3667 9499
      3700 9462
TIME...MOT...LOC 0544Z 270DEG 56KT 3696 9452 3663 9489

$$

1 follow-up statement

179 
WWUS54 KTSA 290604
SVSTSA

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE TULSA OK
1204 AM CST WED FEB 29 2012

OKC115-290613-
/O.CAN.KTSA.SV.W.0009.000000T0000Z-120229T0615Z/
OTTAWA OK-
1204 AM CST WED FEB 29 2012

...THE SEVERE THUNDERSTORM WARNING FOR EASTERN OTTAWA COUNTY IS
CANCELLED...

THE THUNDERSTORM HAS MOVED OUT OF THE WARNED AREA...THEREFORE THE
SEVERE THUNDERSTORM WARNING HAS BEEN CANCELLED.

A TORNADO WATCH REMAINS IN EFFECT UNTIL 5 AM.

LAT...LON 3697 9460 3669 9461 3667 9493 3667 9499
      3700 9462
TIME...MOT...LOC 0603Z 270DEG 56KT 3696 9415 3663 9452

$$

The office that day

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

Issued	Product	Office	Counties	Lasted
Feb 28, 9:01 PM CST	Severe Thunderstorm Warning	TSA	Osage	44 min
Feb 28, 9:41 PM CST	Severe Thunderstorm Warning	TSA	Nowata, Osage, Pawnee, Washington	64 min
Feb 28, 10:15 PM CST	Special Weather Statement	TSA	Creek, Tulsa	30 min
Feb 28, 10:31 PM CST	Special Weather Statement	TSA	Creek, Okmulgee, Tulsa	29 min
Feb 28, 10:47 PM CST	Severe Thunderstorm Warning	TSA	Craig, Nowata, Ottawa, Washington	58 min
Feb 28, 10:57 PM CST	Severe Thunderstorm Warning	TSA	Mayes, Rogers, Tulsa, Wagoner	48 min
Feb 28, 11:31 PM CST	Severe Thunderstorm Warning	TSA	Craig, Delaware, Mayes	30 min
Feb 28, 11:48 PM CST	Special Weather Statement	TSA	Wagoner	27 min
Feb 28, 11:53 PM CST	Severe Thunderstorm Warning	TSA	Delaware	52 min
Feb 28, 11:57 PM CST	Severe Thunderstorm Warning	TSA	Cherokee, Muskogee, Wagoner	48 min
Feb 29, 12:28 AM CST	Special Weather Statement	TSA	Pittsburg	32 min
Feb 29, 12:36 AM CST	Severe Thunderstorm Warning	TSA	Adair, Cherokee	39 min
Feb 29, 12:58 AM CST	Special Weather Statement	TSA	Latimer	32 min
Feb 29, 4:14 AM CST	Fire Weather Watch	TSA	Craig, Creek, Delaware, Mayes, Nowata, Okfuskee and 7 more	23 hr
Feb 29, 4:14 AM CST	Red Flag Warning	TSA	Craig, Nowata, Ottawa	14 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.