Alert archive / Oklahoma / Severe Thunderstorm Warnings in 2011

Severe Thunderstorm Warning 39, NWS Tulsa, OK

April 9, 2011Rogers County, Oklahoma

NWS Tulsa, OK issued this severe thunderstorm warning at Apr 9, 2011, 1:31 AM CDT for Rogers County, Oklahoma. It was in force for 59 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 9, 2011, 1:31 AM CDT (06:31 UTC)
Expired: Apr 9, 2011, 2:30 AM CDT
In force: 59 min
Issued by: NWS Tulsa, OK
Area: Storm-based polygon

County Rogers County, OK

The radar

The Tulsa radar (KINX), 32 km from the middle of the area, began a volume at 06:33 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, 1:58 AM CDT	HAIL 1.75	3 E Oologah, 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, 6.5 hours before the alert went out and 162 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.

655 
WUUS54 KTSA 090631
SVRTSA
OKC131-090730-
/O.NEW.KTSA.SV.W.0039.110409T0631Z-110409T0730Z/

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

THE NATIONAL WEATHER SERVICE IN TULSA HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  NORTHERN ROGERS COUNTY IN NORTHEAST OKLAHOMA

* UNTIL 230 AM CDT

* AT 129 AM CDT...A SEVERE THUNDERSTORM WAS LOCATED 13 MILES WEST OF
  OOLOGAH...MOVING EAST AT 30 MPH.

  STORM HAZARDS INCLUDE...
  HALF DOLLAR SIZE HAIL...
  WIND GUSTS TO 60 MPH...

* SOME LOCATIONS IN OR NEAR THE PATH OF THIS STORM INCLUDE...
  TALALA...OOLOGAH...CLAREMORE...FOYIL AND CHELSEA.

THIS INCLUDES INTERSTATE 44 BETWEEN MILE MARKERS 249 AND 260.

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 3659 9543 3629 9543 3631 9581 3640 9581
      3640 9580 3643 9579 3644 9582 3660 9582
TIME...MOT...LOC 0631Z 275DEG 27KT 3647 9592

$$

LACY

3 follow-up statements

647 
WWUS54 KTSA 090650
SVSTSA

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

OKC131-090730-
/O.CON.KTSA.SV.W.0039.000000T0000Z-110409T0730Z/
ROGERS OK-
150 AM CDT SAT APR 9 2011

...SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 230 AM CDT FOR
NORTHERN ROGERS COUNTY...

AT 145 AM CDT...A SEVERE THUNDERSTORM WAS LOCATED NEAR OOLOGAH...
MOVING EAST AT 35 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...TALALA...
OOLOGAH...CLAREMORE...FOYIL...BUSHYHEAD AND CHELSEA.

THIS INCLUDES INTERSTATE 44 BETWEEN MILE MARKERS 249 AND 259.

GOLFBALL HAIL WAS REPORTED 4 MILES SOUTH OF RAMONA AND 135 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 9543 3629 9543 3631 9581 3640 9581
      3640 9580 3643 9579 3644 9582 3660 9582
TIME...MOT...LOC 0649Z 274DEG 33KT 3645 9573

$$

LACY

679 
WWUS54 KTSA 090703
SVSTSA

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

OKC131-090730-
/O.CON.KTSA.SV.W.0039.000000T0000Z-110409T0730Z/
ROGERS OK-
203 AM CDT SAT APR 9 2011

...SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 230 AM CDT FOR
NORTHERN ROGERS COUNTY...

AT 158 AM CDT...A SEVERE THUNDERSTORM WAS LOCATED 6 MILES WEST OF
FOYIL...MOVING EAST AT 40 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...

GOLFBALL SIZE HAIL COVERED THE GROUND 3 MILES EAST OF OOLOGAH NEAR 
THE OOLOGAH DAM AT 158 AM CDT.

SOME LOCATIONS IN OR NEAR THE PATH OF THIS STORM INCLUDE...FOYIL...
BUSHYHEAD AND CHELSEA.

THIS INCLUDES INTERSTATE 44 BETWEEN MILE MARKERS 250 AND 259.

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 3631 9571 3641 9571 3643 9570 3646 9566
      3656 9569 3659 9543 3629 9543
TIME...MOT...LOC 0702Z 274DEG 33KT 3643 9558

$$

LACY

939 
WWUS54 KTSA 090725
SVSTSA

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

OKC131-090735-
/O.EXP.KTSA.SV.W.0039.000000T0000Z-110409T0730Z/
ROGERS OK-
225 AM CDT SAT APR 9 2011

...THE SEVERE THUNDERSTORM WARNING FOR NORTHEASTERN ROGERS COUNTY
EXPIRES AT 230 AM CDT...

THE THUNDERSTORM HAS MOVED OUT OF THE WARNED AREA...THEREFORE THE
SEVERE THUNDERSTORM WARNING WILL BE ALLOWED TO EXPIRE.

LAT...LON 3631 9571 3641 9571 3643 9570 3646 9566
      3656 9569 3659 9543 3629 9543
TIME...MOT...LOC 0725Z 274DEG 33KT 3641 9532

$$

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, 1:39 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.