Alert archive / Oklahoma / Severe Thunderstorm Warnings in 2011

Severe Thunderstorm Warning 41, NWS Tulsa, OK

April 9, 2011Craig County, Mayes County, Rogers County, Oklahoma

NWS Tulsa, OK issued this severe thunderstorm warning at Apr 9, 2011, 2:10 AM CDT for Craig County, Mayes County, Rogers County, Oklahoma. It was in force for 50 min. 2 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, 2:10 AM CDT (07:10 UTC)
Expired: Apr 9, 2011, 3:00 AM CDT
In force: 50 min
Issued by: NWS Tulsa, OK
Area: Storm-based polygon

Counties Craig County, OK, Mayes County, OK, Rogers County, OK

The radar

The Tulsa radar (KINX), 49 km from the middle of the area, began a volume at 07:10 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 9, 2:24 AM CDT	HAIL 0.75	5 W Adair, OK
Apr 9, 2:51 AM CDT	HAIL 0.88	4 E Adair, 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

Springfield, MO (KSGF), launched 00:00Z, 7.2 hours before the alert went out and 131 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: 1288 J/kg
Mixed-layer CIN: -54 J/kg
Mixed-layer LCL: 2309 m above ground
0-6 km bulk shear: 50 kt
0-1 km storm-relative helicity: 46 m²/s²
0-3 km storm-relative helicity: 157 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 6.2

Open this sounding in Storm Lab

The text

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

324 
WUUS54 KTSA 090710
SVRTSA
OKC035-097-131-090800-
/O.NEW.KTSA.SV.W.0041.110409T0710Z-110409T0800Z/

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

THE NATIONAL WEATHER SERVICE IN TULSA HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  SOUTHEASTERN CRAIG COUNTY IN NORTHEAST OKLAHOMA
  NORTHERN MAYES COUNTY IN NORTHEAST OKLAHOMA
  NORTHEASTERN ROGERS COUNTY IN NORTHEAST OKLAHOMA

* UNTIL 300 AM CDT

* AT 206 AM CDT...A SEVERE THUNDERSTORM WAS LOCATED 14 MILES WEST OF
  ADAIR...MOVING EAST AT 35 MPH. THIS STORM HAS A HISTORY OF
  PRODUCING HAIL TO THE SIZE OF GOLFBALLS.

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

* SOME LOCATIONS IN OR NEAR THE PATH OF THIS STORM INCLUDE...ADAIR...
  BIG CABIN...PENSACOLA...LANGLEY...SPAVINAW AND KETCHUM.

THIS INCLUDES INTERSTATE 44 BETWEEN MILE MARKERS 261 AND 279.

GOLFBALL HAIL WAS REPORTED 3 MILES EAST OF OOLOGAH NEAR THE DAM AT 
158 AM CDT. 

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.

PERSONS NEAR THE PATH OF THIS DANGEROUS STORM SHOULD PREPARE FOR
LARGE DESTRUCTIVE HAIL. THIS STORM HAS THE POTENTIAL TO CAUSE SERIOUS
INJURY AND SIGNIFICANT DAMAGE TO PROPERTY. IF NO UNDERGROUND SHELTER
IS AVAILABLE TAKE COVER ON THE LOWEST FLOOR IN AN INTERIOR ROOM AND
STAY AWAY FROM WINDOWS.

&&

LAT...LON 3659 9501 3632 9501 3633 9543 3658 9543
TIME...MOT...LOC 0710Z 270DEG 31KT 3646 9548

$$

LACY

1 follow-up statement

726 
WWUS54 KTSA 090742
SVSTSA

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

OKC131-090751-
/O.CAN.KTSA.SV.W.0041.000000T0000Z-110409T0800Z/
ROGERS OK-
242 AM CDT SAT APR 9 2011

...THE SEVERE THUNDERSTORM WARNING FOR NORTHEASTERN ROGERS COUNTY IS
CANCELLED...

LAT...LON 3656 9501 3632 9501 3633 9530 3652 9528
      3659 9502
TIME...MOT...LOC 0741Z 270DEG 31KT 3645 9520

$$

OKC035-097-090800-
/O.CON.KTSA.SV.W.0041.000000T0000Z-110409T0800Z/
CRAIG OK-MAYES OK-
242 AM CDT SAT APR 9 2011

...SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 300 AM CDT FOR
NORTHEASTERN MAYES AND SOUTHEASTERN CRAIG COUNTIES...

AT 239 AM CDT...A SEVERE THUNDERSTORM WAS LOCATED NEAR ADAIR...MOVING
EAST AT 35 MPH.

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

SOME LOCATIONS IN OR NEAR THE PATH OF THIS STORM INCLUDE...STRANG...
PENSACOLA...LANGLEY...SPAVINAW AND KETCHUM.

THIS INCLUDES INTERSTATE 44 BETWEEN MILE MARKERS 272 AND 274.

LAT...LON 3656 9501 3632 9501 3633 9530 3652 9528
      3659 9502
TIME...MOT...LOC 0741Z 270DEG 31KT 3645 9520

$$

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, 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, 2:14 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.