Alert archive / Oklahoma / Severe Thunderstorm Warnings in 2009

Severe Thunderstorm Warning 336, NWS Tulsa, OK

July 4, 2009LeFlore County, Oklahoma

NWS Tulsa, OK issued this severe thunderstorm warning at Jul 4, 2009, 1:52 PM CDT for LeFlore County, Oklahoma. It was in force for 53 min. No storm report in the archive falls inside the area while it was in force.

The area

The counties it named.

The facts

Issued: Jul 4, 2009, 1:52 PM CDT (18:52 UTC)
Expired: Jul 4, 2009, 2:45 PM CDT
In force: 53 min
Issued by: NWS Tulsa, OK
Area: Storm-based polygon

County LeFlore County, OK

The radar

The Western Arkansas radar (KSRX), 53 km from the middle of the area, began a volume at 18:56 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 watch it was issued in

The SPC watch in force over the same counties when this warning went out.

Issued	Product	Office	Lasted
Jul 4, 12:25 PM CDT	Severe Thunderstorm Watch	SPC	8 hr

The nearest sounding before it

Norman, OK (KOUN), launched 12:00Z, 6.9 hours before the alert went out and 248 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: 785 J/kg
Mixed-layer CIN: -173 J/kg
Mixed-layer LCL: 1666 m above ground
0-6 km bulk shear: 30 kt
0-1 km storm-relative helicity: 164 m²/s²
0-3 km storm-relative helicity: 278 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 2.5

Open this sounding in Storm Lab

What forecasters said that day

The local office's own words before this severe thunderstorm warning went out, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.

NWS Tulsa, OK wrote its last area forecast discussion before this severe thunderstorm warning went out at Jul 4, 12:43 PM CDT, 1 hour 9 minutes earlier.

Area forecast discussion, Jul 4, 12:43 PM CDT, 1 hour 9 minutes before

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Hazardous weather outlook, Jul 4, 1:05 PM CDT, 47 minutes before

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In the hours before

Special weather statement, Jul 4, 11:51 AM CDT, 2 hours 1 minute before

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE TULSA OK
1151 AM CDT SAT JUL 4 2009

ARZ010-011-019-020-029-OKZ072-041730-
CRAWFORD AR-FRANKLIN AR-MADISON AR-SEBASTIAN AR-SEQUOYAH
OK-WASHINGTON AR-
1151 AM CDT SAT JUL 4 2009

...SIGNIFICANT WEATHER ALERT...

THE NATIONAL WEATHER SERVICE IN TULSA HAS ISSUED A
SIGNIFICANT WEATHER ALERT EFFECTIVE UNTIL 1230 PM CDT
FOR THE FOLLOWING COUNTIES...

IN NORTHWEST ARKANSAS
     WASHINGTON...CRAWFORD AND SOUTHWESTERN MADISON

IN WEST CENTRAL ARKANSAS
     NORTHERN SEBASTIAN AND NORTHWESTERN FRANKLIN

IN EAST CENTRAL OKLAHOMA
     NORTHEASTERN SEQUOYAH

AT 1151 AM CDT...DOPPLER RADAR INDICATED STRONG THUNDERSTORMS ALONG A
LINE EXTENDING FROM 3 MILES NORTHEAST OF GREENLAND TO 3 MILES SOUTH
OF SHORT...MOVING SOUTHEAST AT 30 MPH. SOME LOCATIONS THAT WILL BE
AFFECTED BY THESE STORMS INCLUDE...SHORT...MOFFETT...PLEASANT HILL...
HICKS...PINEY...SHADY GROVE...UNIONTOWN...CONCORD...BIDVILLE...
ODELL...WALNUT GROVE...FERN...FORT SMITH...GREENWOOD...BARLING...
LAVACA...CENTRAL CITY...COMBS...PATRICK...DELANEY...CROSSES...
FAYETTEVILLE...WINSLOW...WEST FORK...PRAIRIE GROVE...ELKINS...
FARMINGTON...BLACKBURN...HOGEYE...STRICKLER...BRENTWOOD...WOOLSEY...
WYOLA...ARNETT...DURHAM...SULPHUR CITY...BLACK OAK...GREENLAND...
JOHNSON...MOUNTAINBURG...VAN BUREN...ALMA...CEDARVILLE...NATURAL
DAM...CHESTER...KIBLER...SHIBLEY...FURRY...DYER...FIGURE FIVE...
RUDY...DORA...LEE CREEK...LOCKE AND MOUNT GAYLER.

THESE STORMS WILL BE CAPABLE OF PRODUCING SMALL HAIL AND WIND GUSTS
TO 50 MPH. RESIDENTS IN THESE AREAS SHOULD REMAIN ALERT IN CASE THE
SIGNIFICANT WEATHER ALERT IS UPGRADED TO A WARNING.

LAT...LON 3521 9425 3536 9444 3539 9444 3538 9446
      3550 9461 3565 9452 3565 9447 3571 9449
      3621 9416 3587 9380
TIME...MOT...LOC 1651Z 315DEG 26KT 3602 9414 3552 9448

Special weather statement, Jul 4, 12:29 PM CDT, 1 hour 23 minutes before

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE TULSA OK
1229 PM CDT SAT JUL 4 2009

ARZ019-020-029-OKZ072-074-076-041815-
CRAWFORD AR-FRANKLIN AR-HASKELL OK-LE FLORE OK-SEBASTIAN AR-SEQUOYAH
OK-
1229 PM CDT SAT JUL 4 2009

...SIGNIFICANT WEATHER ALERT...

THE NATIONAL WEATHER SERVICE IN TULSA HAS ISSUED A
SIGNIFICANT WEATHER ALERT EFFECTIVE UNTIL 115 PM CDT
FOR THE FOLLOWING COUNTIES...

IN WEST CENTRAL ARKANSAS
     SEBASTIAN AND SOUTHWESTERN FRANKLIN

IN NORTHWEST ARKANSAS
     SOUTHWESTERN CRAWFORD

IN EAST CENTRAL OKLAHOMA
     SOUTHEASTERN SEQUOYAH

IN SOUTHEAST OKLAHOMA
     SOUTHEASTERN HASKELL AND NORTHERN LE FLORE

AT 1229 PM CDT...DOPPLER RADAR INDICATED STRONG THUNDERSTORMS ALONG A
LINE EXTENDING FROM 2 MILES SOUTHWEST OF VAN BUREN TO 3 MILES
NORTHWEST OF MILTON...MOVING SOUTHEAST AT 35 MPH. SOME LOCATIONS THAT
WILL BE AFFECTED BY THESE STORMS INCLUDE...COTTONWOOD...KEOTA...
MULDROW...ROLAND...MOFFETT...POTEAU...SUMMERFIELD...HEAVENER...
HOWE...WISTER...SHADY POINT...CAMERON...MILTON...PANAMA...BOKOSHE...
ROCK ISLAND...SPIRO...POCOLA...SCULLYVILLE...BRADEN...COWLINGTON...
ARKOMA...LIBERTY...CROSSROADS...MILLTOWN...PATTERSON...MILL CREEK...
CHARLESTON...URSULA...FORT SMITH...HARTFORD...HACKETT...GREENWOOD...
BARLING...LAVACA...ARKOLA...HUNTINGTON...MIDLAND...DAYTON...
WITCHERVILLE...WASHBURN...BURNVILLE...JENSON...EXCELSIOR...
MANSFIELD...BONANZA...FORT CHAFFEE...JENNY LIND...RYE HILL...
BLOOMER...CENTRAL CITY...VAN BUREN...SHIBLEY AND DORA.

THESE STORMS WILL BE CAPABLE OF PRODUCING SMALL HAIL AND WIND GUSTS
TO 50 MPH. RESIDENTS IN THESE AREAS SHOULD REMAIN ALERT IN CASE THE
SIGNIFICANT WEATHER ALERT IS UPGRADED TO A WARNING.

LAT...LON 3522 9398 3523 9402 3518 9402 3514 9406
      3514 9413 3510 9415 3507 9423 3495 9423
      3495 9437 3492 9444 3489 9445 3480 9486
      3523 9498 3551 9439 3526 9394
TIME...MOT...LOC 1729Z 341DEG 29KT 3540 9436 3517 9490

Special weather statement, Jul 4, 1:00 PM CDT, 52 minutes before

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Special weather statement, Jul 4, 1:43 PM CDT, 9 minutes before

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The office that day

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

Issued	Product	Office	Counties	Lasted
Jul 4, 3:59 AM CDT	Heat Advisory	TSA	Choctaw, Haskell, Latimer, McIntosh, Muskogee, Okfuskee and 3 more	15 hr
Jul 4, 12:29 PM CDT	Special Weather Statement	TSA	LeFlore	46 min
Jul 4, 1:00 PM CDT	Special Weather Statement	TSA	Latimer	45 min
Jul 4, 1:43 PM CDT	Special Weather Statement	TSA	Pittsburg	47 min
Jul 4, 2:54 PM CDT	Special Weather Statement	TSA	Pittsburg	36 min
Jul 4, 3:26 PM CDT	Special Weather Statement	TSA	Latimer	34 min
Jul 4, 4:11 PM CDT	Special Weather Statement	TSA	Pittsburg	64 min
Jul 4, 5:02 PM CDT	Special Weather Statement	TSA	Pittsburg	28 min
Jul 4, 5:27 PM CDT	Special Weather Statement	TSA	Pittsburg	33 min
Jul 4, 6:17 PM CDT	Special Weather Statement	TSA	Okmulgee	28 min
Jul 4, 6:38 PM CDT	Special Weather Statement	TSA	Latimer	37 min
Jul 4, 6:49 PM CDT	Special Weather Statement	TSA	McIntosh	56 min
Jul 4, 6:50 PM CDT	Special Weather Statement	TSA	Haskell	55 min
Jul 4, 11:51 AM CDT	Special Weather Statement	TSA	Crawford, Washington	39 min
Jul 4, 12:22 PM CDT	Severe Thunderstorm Warning	TSA	Crawford, Franklin, Sebastian	53 min

Nearby

Severe Thunderstorm Warnings in Oklahoma, 2009 Every severe thunderstorm warning in 2009

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.