Alert archive / Oklahoma / Tornado Warnings in 2011

Tornado Warning 3, NWS Tulsa, OK

April 8, 2011Osage County, Oklahoma

NWS Tulsa, OK issued this tornado warning at Apr 8, 2011, 11:26 PM CDT for Osage County, Oklahoma. It was in force for 34 min. 5 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 8, 2011, 11:26 PM CDT (04:26 UTC)
Expired: Apr 9, 2011, 12:00 AM CDT
In force: 34 min
Issued by: NWS Tulsa, OK
Area: Storm-based polygon

County Osage County, OK

The radar

The Wichita radar (KICT), 114 km from the middle of the area, began a volume at 04:27 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 8, 11:50 PM CDT	HAIL 1.75	Webb City, OK	TIME ESTIMATED BASED ON RADAR.
Apr 8, 11:55 PM CDT	TSTM WND DMG	Burbank, OK	NUMEROUS TREES AND LARGE TREE LIMBS BROKEN BY WIND.
Apr 8, 11:58 PM CDT	HAIL 1.5	Burbank, OK
Apr 8, 11:59 PM CDT	TSTM WND DMG	Burbank, OK	ROOF DAMAGE TO MOBILE HOMES ON HWY 60 NEAR BURBANK. TIME WAS ESTIMATED BASED ON RADAR.
Apr 9, 12:10 AM CDT	HAIL 1.75	3 Sw Shidler, 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, 4.4 hours before the alert went out and 60 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.

680 
WFUS54 KTSA 090426
TORTSA
OKC113-090500-
/O.NEW.KTSA.TO.W.0003.110409T0426Z-110409T0500Z/

BULLETIN - EAS ACTIVATION REQUESTED
TORNADO WARNING
NATIONAL WEATHER SERVICE TULSA OK
1126 PM CDT FRI APR 8 2011

THE NATIONAL WEATHER SERVICE IN TULSA HAS ISSUED A

* TORNADO WARNING FOR...
  WESTERN OSAGE COUNTY IN NORTHEAST OKLAHOMA

* UNTIL MIDNIGHT CDT

* AT 1121 PM CDT...STORM CHASERS WERE TRACKING A TORNADO LOCATED 11 
MILES NORTHWEST OF BURBANK...MOVING EAST AT 30 MPH. A TORNADO HAS 
BEEN REPORTED...TAKE COVER NOW!

* SOME LOCATIONS IN OR NEAR THE PATH OF THIS STORM INCLUDE...BURBANK
  AND SHIDLER.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

IF YOU ARE NEAR THE PATH OF THIS STORM...TAKE COVER NOW! IF NO
UNDERGROUND SHELTER IS AVAILABLE MOVE TO AN INTERIOR ROOM ON THE
LOWEST FLOOR. MOBILE HOMES AND VEHICLES SHOULD BE ABANDONED FOR MORE
SUBSTANTIAL SHELTER. AVOID WINDOWS!

NIGHTTIME TORNADOES ARE ESPECIALLY DANGEROUS...TAKE COVER NOW! IF YOU
WAIT UNTIL YOU SEE OR HEAR IT COMING...IT MAY BE TOO LATE TO GET TO A
SAFE PLACE!

&&

LAT...LON 3669 9700 3670 9699 3670 9694 3676 9689
      3676 9683 3678 9681 3679 9676 3687 9675
      3687 9657 3667 9659
TIME...MOT...LOC 0425Z 273DEG 25KT 3678 9686

$$

LACY

2 follow-up statements

448 
WWUS54 KTSA 090439
SVSTSA

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE TULSA OK
1139 PM CDT FRI APR 8 2011

OKC113-090500-
/O.CON.KTSA.TO.W.0003.000000T0000Z-110409T0500Z/
OSAGE OK-
1139 PM CDT FRI APR 8 2011

...TORNADO WARNING REMAINS IN EFFECT UNTIL MIDNIGHT CDT FOR WESTERN
OSAGE COUNTY...

AT 1134 PM CDT...DOPPLER RADAR CONTINUED TO INDICATE A SEVERE
THUNDERSTORM CAPABLE OF PRODUCING A TORNADO LOCATED NEAR APPERSON...
MOVING EAST AT 30 MPH.

SOME LOCATIONS IN OR NEAR THE PATH OF THIS STORM INCLUDE...
APPERSON...BURBANK...WEBB CITY AND SHIDLER.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

IF YOU ARE NEAR THE PATH OF THIS STORM...TAKE COVER NOW! IF NO
UNDERGROUND SHELTER IS AVAILABLE MOVE TO AN INTERIOR ROOM ON THE
LOWEST FLOOR. MOBILE HOMES AND VEHICLES SHOULD BE ABANDONED FOR MORE
SUBSTANTIAL SHELTER. AVOID WINDOWS!

NIGHTTIME TORNADOES ARE ESPECIALLY DANGEROUS...TAKE COVER NOW! IF YOU
WAIT UNTIL YOU SEE OR HEAR IT COMING...IT MAY BE TOO LATE TO GET TO A
SAFE PLACE!

&&

LAT...LON 3669 9700 3670 9699 3670 9694 3676 9689
      3676 9683 3678 9681 3679 9676 3687 9675
      3687 9657 3667 9659
TIME...MOT...LOC 0438Z 273DEG 25KT 3676 9679

$$

LACY

630 
WWUS54 KTSA 090458
SVSTSA

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE TULSA OK
1158 PM CDT FRI APR 8 2011

OKC113-090507-
/O.EXP.KTSA.TO.W.0003.000000T0000Z-110409T0500Z/
OSAGE OK-
1158 PM CDT FRI APR 8 2011

...THE TORNADO WARNING FOR WESTERN OSAGE COUNTY EXPIRES AT MIDNIGHT
CDT...

THE ROTATION WITHIN THE STORM HAS WEAKENED...HOWEVER SEVERE 
THUNDERSTORMS CAN AND DO OCCASIONALLY PRODUCE TORNADOES WITH LITTLE 
OR NO WARNING.

A TORNADO WATCH REMAINS IN EFFECT UNTIL 1 AM CDT.

LAT...LON 3669 9700 3670 9699 3670 9694 3676 9689
      3676 9683 3678 9681 3679 9676 3687 9675
      3687 9657 3667 9659
TIME...MOT...LOC 0457Z 273DEG 25KT 3675 9663

$$

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, 11:53 PM CDT	Severe Thunderstorm Warning	TSA	Osage, Pawnee	22 min
Apr 9, 12:16 AM CDT	Severe Thunderstorm Warning	TSA	Osage, Pawnee	59 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

Tornado Warnings in Oklahoma, 2011 Every tornado warning in 2011 Tornadoes 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.