Alert archive / Oklahoma / Severe Thunderstorm Warnings in 2011

Severe Thunderstorm Warning 113, NWS Norman, OK

April 25, 2011Atoka County, Bryan County, Oklahoma

NWS Norman, OK issued this severe thunderstorm warning at Apr 25, 2011, 4:25 AM CDT for Atoka County, Bryan County, Oklahoma. It was in force for 23 min. No storm report in the archive falls inside the area while it was in force.

The area

The outline as issued.

The facts

Issued: Apr 25, 2011, 4:25 AM CDT (09:25 UTC)
Expired: Apr 25, 2011, 4:48 AM CDT
In force: 23 min
Issued by: NWS Norman, OK
Area: Storm-based polygon

Counties Atoka County, OK, Bryan County, OK

The radar

The Norman radar (KTLX), 181 km from the middle of the area, began a volume at 09:28 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.

The nearest sounding before it

Fort Worth, TX (KFWD), launched 00:00Z, 9.4 hours before the alert went out and 196 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: 1679 J/kg
Mixed-layer CIN: -14 J/kg
Mixed-layer LCL: 1811 m above ground
0-6 km bulk shear: 52 kt
0-1 km storm-relative helicity: 98 m²/s²
0-3 km storm-relative helicity: 153 m²/s²
Significant tornado parameter: 0.3
Supercell composite: 6.0

Open this sounding in Storm Lab

The text

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

600 
WUUS54 KOUN 250925
SVROUN
OKC005-013-251015-
/O.NEW.KOUN.SV.W.0113.110425T0925Z-110425T1015Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE NORMAN OK
425 AM CDT MON APR 25 2011

THE NATIONAL WEATHER SERVICE IN NORMAN HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  EASTERN ATOKA COUNTY IN SOUTHEAST OKLAHOMA...
  EASTERN BRYAN COUNTY IN SOUTHEAST OKLAHOMA...

* UNTIL 515 AM CDT

* AT 424 AM CDT...NATIONAL WEATHER SERVICE RADAR INDICATED THE       
  LEADING EDGE OF SEVERE THUNDERSTORMS ALONG A LINE EXTENDING FROM   
  10 MILES SOUTHEAST OF LANE TO 13 MILES SOUTHEAST OF                
  ALBANY...MOVING EAST AT 55 MPH.

HAZARDS IN THE WARNING INCLUDE...
HAIL UP TO THE SIZE OF QUARTERS...
WIND GUSTS TO 65 MPH...

* LOCATIONS IN THE WARNING INCLUDE ALBANY...BENNINGTON...BENTLEY...
  BOKCHITO...DAISY...LANE...MCGEE CREEK LAKE...REDDEN AND WADE.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

SEVERE THUNDERSTORMS CAN PRODUCE TORNADOES WITH NO ADVANCE WARNING.
MOVE IMMEDIATELY TO A STORM SHELTER... BASEMENT OR STURDY BUILDING IF
A TORNADO IS SIGHTED.

&&

LAT...LON 3450 9567 3450 9578 3417 9578 3416 9596
      3412 9593 3394 9593 3386 9575 3383 9584
      3389 9594 3385 9596 3387 9599 3382 9613
      3377 9616 3375 9622 3377 9627 3468 9594
      3468 9587 3460 9587 3460 9568 3457 9566
TIME...MOT...LOC 0924Z 256DEG 47KT 3421 9582 3378 9593

$$

1 follow-up statement

809 
WWUS54 KOUN 250948
SVSOUN

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE NORMAN OK
448 AM CDT MON APR 25 2011

OKC005-013-250959-
/O.CAN.KOUN.SV.W.0113.000000T0000Z-110425T1015Z/
BRYAN OK-ATOKA OK-
448 AM CDT MON APR 25 2011

...THE SEVERE THUNDERSTORM WARNING HAS BEEN CANCELLED FOR EASTERN
ATOKA AND EASTERN BRYAN COUNTIES...

THE STORMS HAVE MOVED OUT OF THE AREA.

LAT...LON 3450 9567 3450 9578 3417 9578 3416 9596
      3412 9593 3394 9593 3386 9575 3383 9584
      3389 9594 3385 9596 3387 9599 3382 9613
      3377 9616 3375 9622 3377 9627 3468 9594
      3468 9587 3460 9587 3460 9568 3457 9566
TIME...MOT...LOC 0949Z 256DEG 47KT 3429 9544 3386 9555

$$

The office that day

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

Issued	Product	Office	Counties	Lasted
Apr 24, 7:31 PM CDT	River Flood Warning	OUN	Pottawatomie, Seminole	13 hr
Apr 24, 7:33 PM CDT	Special Weather Statement	OUN	Cleveland	27 min
Apr 24, 7:44 PM CDT	Special Weather Statement	OUN	Bryan	16 min
Apr 24, 7:54 PM CDT	Special Weather Statement	OUN	Cleveland	21 min
Apr 24, 8:02 PM CDT	Severe Thunderstorm Warning	OUN	Bryan	58 min
Apr 24, 8:13 PM CDT	Special Weather Statement	OUN	Lincoln	17 min
Apr 24, 8:19 PM CDT	Severe Thunderstorm Warning	OUN	Lincoln, Pottawatomie	56 min
Apr 24, 9:06 PM CDT	Severe Thunderstorm Warning	OUN	Carter, Garvin, Jefferson, Murray, Stephens	54 min
Apr 24, 10:11 PM CDT	Special Weather Statement	OUN	Atoka, Bryan	49 min
Apr 25, 2:48 AM CDT	Special Weather Statement	OUN	Love	12 min
Apr 25, 2:52 AM CDT	Dense Fog Advisory	OUN	Blaine, Caddo, Canadian, Cleveland, Comanche, Cotton and 17 more	7 hr
Apr 25, 2:59 AM CDT	Special Weather Statement	OUN	Marshall	31 min
Apr 25, 3:04 AM CDT	Special Weather Statement	OUN	Kingfisher	26 min
Apr 25, 3:20 AM CDT	Special Weather Statement	OUN	Noble	25 min
Apr 25, 3:23 AM CDT	Special Weather Statement	OUN	Atoka, Bryan	52 min
Apr 25, 3:28 AM CDT	Special Weather Statement	OUN	Noble	32 min
Apr 25, 3:52 AM CDT	Severe Thunderstorm Warning	OUN	Atoka, Bryan, Johnston, Marshall	38 min
Apr 25, 4:02 AM CDT	Special Weather Statement	OUN	Garfield, Kay, Noble	28 min
Apr 25, 4:28 AM CDT	Special Weather Statement	OUN	Garfield, Kay, Noble	32 min
Apr 25, 4:38 AM CDT	Special Weather Statement	OUN	Garfield	37 min
Apr 25, 4:58 AM CDT	Special Weather Statement	OUN	Kay, Noble	32 min
Apr 25, 10:53 AM CDT	Special Weather Statement	OUN	Pontotoc	22 min
Apr 25, 11:08 AM CDT	Severe Thunderstorm Warning	OUN	Hughes, Pontotoc	52 min
Apr 25, 11:18 AM CDT	Severe Thunderstorm Warning	OUN	Hughes	27 min
Apr 25, 11:55 AM CDT	Areal Flood Advisory	OUN	Hughes	3 hr
Apr 25, 12:05 PM CDT	Special Weather Statement	OUN	Hughes	25 min
Apr 25, 1:17 PM CDT	Special Weather Statement	OUN	Love, Pontotoc	28 min
Apr 25, 1:44 PM CDT	Special Weather Statement	OUN	Coal	16 min
Apr 25, 1:49 PM CDT	Severe Thunderstorm Warning	OUN	Coal	41 min
Apr 25, 1:51 PM CDT	Severe Thunderstorm Warning	OUN	Love	39 min
Apr 25, 2:07 PM CDT	Severe Thunderstorm Warning	OUN	Johnston, Marshall	21 min
Apr 25, 2:26 PM CDT	Special Weather Statement	OUN	Marshall	19 min
Apr 25, 2:37 PM CDT	Severe Thunderstorm Warning	OUN	Atoka	38 min
Apr 25, 2:41 PM CDT	Severe Thunderstorm Warning	OUN	Atoka, Bryan, Johnston, Marshall	49 min
Apr 25, 3:28 PM CDT	Special Weather Statement	OUN	Harmon	17 min
Apr 25, 3:34 PM CDT	Special Weather Statement	OUN	Atoka, Bryan	26 min
Apr 25, 3:48 PM CDT	Special Weather Statement	OUN	Beckham	27 min
Apr 25, 3:49 PM CDT	Special Weather Statement	OUN	Greer	26 min
Apr 25, 4:12 PM CDT	Special Weather Statement	OUN	Greer, Harmon	18 min
Apr 25, 4:13 PM CDT	Special Weather Statement	OUN	Beckham	32 min
Apr 25, 4:28 PM CDT	Severe Thunderstorm Warning	OUN	Greer, Jackson, Kiowa	32 min
Apr 25, 4:43 PM CDT	Severe Thunderstorm Warning	OUN	Beckham, Custer, Washita	31 min
Apr 25, 4:52 PM CDT	Severe Thunderstorm Warning	OUN	Comanche, Jackson, Kiowa, Tillman	38 min
Apr 25, 4:57 PM CDT	Special Weather Statement	OUN	Jackson	18 min
Apr 25, 5:11 PM CDT	Severe Thunderstorm Warning	OUN	Jackson, Kiowa, Tillman	49 min
Apr 25, 5:38 PM CDT	Special Weather Statement	OUN	Beckham	22 min
Apr 25, 5:53 PM CDT	Severe Thunderstorm Warning	OUN	Beckham, Greer	67 min
Apr 25, 5:59 PM CDT	Special Weather Statement	OUN	Harmon	31 min
Apr 25, 6:14 PM CDT	Special Weather Statement	OUN	Washita	31 min
Apr 25, 6:34 PM CDT	Severe Thunderstorm Warning	OUN	Greer, Harmon, Jackson	41 min
Apr 25, 6:42 PM CDT	Special Weather Statement	OUN	Grady, Stephens	33 min
Apr 25, 6:45 PM CDT	Special Weather Statement	OUN	Washita	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; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.