Alert archive / Arkansas / Severe Thunderstorm Warnings in 2009

Severe Thunderstorm Warning 12, NWS Tulsa, OK

February 10, 2009Crawford County, Franklin County, Sebastian County, Arkansas

NWS Tulsa, OK issued this severe thunderstorm warning at Feb 10, 2009, 11:44 PM CST for Crawford County, Franklin County, Sebastian County, Arkansas. It was in force for 51 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: Feb 10, 2009, 11:44 PM CST (05:44 UTC)
Expired: Feb 11, 2009, 12:35 AM CST
In force: 51 min
Issued by: NWS Tulsa, OK
Area: Storm-based polygon

Counties Crawford County, AR, Franklin County, AR, Sebastian County, AR

The radar

The Western Arkansas radar (KSRX), 26 km from the middle of the area, began a volume at 05:46 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
Feb 10, 9:30 PM CST	Tornado Watch	SPC	7 hr

The nearest sounding before it

Springfield, MO (KSGF), launched 00:00Z, 5.7 hours before the alert went out and 166 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: 7 J/kg
Mixed-layer CIN: -98 J/kg
Mixed-layer LCL: 1210 m above ground
0-6 km bulk shear: 76 kt
0-1 km storm-relative helicity: 96 m²/s²
0-3 km storm-relative helicity: 177 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.4

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 Feb 10, 11:31 PM CST, 13 minutes earlier.

Area forecast discussion, Feb 10, 11:31 PM CST, 13 minutes before

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Hazardous weather outlook, Feb 10, 7:03 PM CST, 4 hours 41 minutes before

HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE TULSA OK
703 PM CST TUE FEB 10 2009

ARZ001-002-010-011-019-020-029-OKZ049-053>076-111100-
ADAIR OK-BENTON AR-CARROLL AR-CHEROKEE OK-CHOCTAW OK-CRAIG OK-
CRAWFORD AR-CREEK OK-DELAWARE OK-FRANKLIN AR-HASKELL OK-LATIMER OK-
LE FLORE OK-MADISON AR-MAYES OK-MCINTOSH OK-MUSKOGEE OK-NOWATA OK-
OKFUSKEE OK-OKMULGEE OK-OSAGE OK-OTTAWA OK-PAWNEE OK-PITTSBURG OK-
PUSHMATAHA OK-ROGERS OK-SEBASTIAN AR-SEQUOYAH OK-TULSA OK-WAGONER OK-
WASHINGTON OK-WASHINGTON AR-
702 PM CST TUE FEB 10 2009

...SIGNIFICANT THREAT OF SEVERE WEATHER TONIGHT...

THIS OUTLOOK IS FOR NORTHWEST AND WEST CENTRAL ARKANSAS AS WELL AS
MUCH OF EASTERN OKLAHOMA.

.DAY ONE...TODAY AND TONIGHT.
TORNADO.
RISK...SIGNIFICANT.
AREA...ALL OF EASTERN OKLAHOMA AND NORTHWEST ARKANSAS.
ONSET...ONGOING.

SEVERE THUNDERSTORM.
RISK...SIGNIFICANT.
AREA...ALL OF EASTERN OKLAHOMA AND NORTHWEST ARKANSAS.
ONSET...ONGOING.

FLASH FLOOD.
RISK...ELEVATED.
        AREA...SOUTHEAST OKLAHOMA AND NORTHWEST ARKANSAS.
        ONSET...ONGOING.
        AREA AT GREATEST RISK...SOUTHEAST OKLAHOMA INTO NORTHWEST
         ARKANSAS.

HEAVY RAIN.
RISK...SIGNIFICANT.
AREA...EASTERN OKLAHOMA AND NORTHWEST ARKANSAS.
ONSET...ON GOING
AREA AT GREATEST RISK...SOUTHEAST OKLAHOMA AND NORTHWEST ARKANSAS.

DISCUSSION...
A STRONG UPPER LEVEL STORM SYSTEM WILL MOVE ACROSS THE AREA
TONIGHT. SCATTERED SEVERE THUNDERSTORMS ARE OCCURRING AT THIS
TIME. OTHER STRONG TO SEVERE THUNDERSTORMS WILL CONTINUE TO
DEVELOP ACROSS CENTRAL OKLAHOMA DURING THE EVENING AND ARE
EXPECTED TO MOVE EASTWARD INTO DEEPER...MOIST UNSTABLE AIR. WIND
FIELDS ALOFT WILL PROVIDE SUFFICIENT SHEAR TO DEVELOP SUPER CELLS
WITH THE POTENTIAL FOR TORNADO DEVELOPMENT. TORNADOES HAVE ALREADY
OCCURRED DURING THE AFTERNOON WITH SOME THUNDERSTORMS. LARGE HAIL
TO THE SIZE OF GOLF BALLS WILL ALSO BE POSSIBLE. THE SYSTEM WILL
MOVE RAPIDLY EAST DURING THE NIGHT...EXITING EASTERN OKLAHOMA
BETWEEN MIDNIGHT AND ABOUT 2 AM. THE SEVERE POTENTIAL SHOULD MOVE
OUT OF NORTHWEST ARKANSAS BY 4 AM.

SPOTTER AND EMERGENCY MANAGEMENT ACTION STATEMENT...
SPOTTER ACTIVATION WILL BE NEEDED.

.DAYS TWO THROUGH SEVEN...WEDNESDAY THROUGH MONDAY.
WEDNESDAY...THUNDERSTORM POTENTIAL...MARGINAL FIRE WEATHER
POTENTIAL...HIGH WIND POTENTIAL EARLY.
THURSDAY...NO HAZARDS.
FRIDAY...THUNDERSTORM POTENTIAL...HIGH FIRE WEATHER POTENTIAL...HIGH
WIND POTENTIAL.
SATURDAY...VERY HIGH FIRE WEATHER POTENTIAL...HIGH
WIND POTENTIAL.
SUNDAY...NO HAZARDS.
MONDAY...NO HAZARDS.

EXTENDED DISCUSSION...
ISOLATED THUNDERSTORMS WILL STILL BE POSSIBLE WEDNESDAY
MORNING..WITH SHOWERS MORE LIKELY. INSTABILITY WILL BE VERY
LIMITED...SO NO SEVERE WEATHER IS EXPECTED. HOWEVER...INCREASING
DRY NORTHWEST WINDS WILL PROVIDE SOME WILD FIRE POTENTIAL
WEDNESDAY AFTERNOON. A GREATER WILD FIRE THREAT WILL DEVELOP
FRIDAY WHEN STRONG...DRY WESTERLY WINDS SPREAD ACROSS THE AREA.
MORE SEASONABLE TEMPERATURES IS EXPECTED OVER THE WEEKEND.

WWW.SRH.NOAA.GOV/TULSA CONTAINS ADDITIONAL TABULAR AND GRAPHICAL
INFORMATION.

In the hours before

Local storm report, Feb 10, 10:51 PM CST, 53 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE TULSA OK
1051 PM CST TUE FEB 10 2009

..TIME...   ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
..DATE...   ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
            ..REMARKS..

1034 PM     HAIL             WILBURTON               34.92N 95.31W
02/10/2009  E0.75 INCH       LATIMER            OK   LAW ENFORCEMENT

&&

SFP

Special weather statement, Feb 10, 11:00 PM CST, 44 minutes before

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE TULSA OK
1100 PM CST TUE FEB 10 2009

ARZ002-010-011-019-020-029-OKZ049-053-072-074>076-110615-
CARROLL AR-CHOCTAW OK-CRAWFORD AR-FRANKLIN AR-HASKELL OK-LATIMER
OK-LE FLORE OK-MADISON AR-PUSHMATAHA OK-SEBASTIAN AR-SEQUOYAH
OK-WASHINGTON AR-
1100 PM CST TUE FEB 10 2009

...SIGNIFICANT WEATHER ALERT...

THE NATIONAL WEATHER SERVICE IN TULSA HAS ISSUED A
SIGNIFICANT WEATHER ALERT EFFECTIVE UNTIL 1215 AM CST
FOR THE FOLLOWING COUNTIES...

IN NORTHWEST ARKANSAS
     WASHINGTON...CARROLL...CRAWFORD AND MADISON

IN WEST CENTRAL ARKANSAS
     SEBASTIAN AND FRANKLIN

IN EAST CENTRAL OKLAHOMA
     EASTERN SEQUOYAH

IN SOUTHEAST OKLAHOMA
     EASTERN HASKELL...LE FLORE...EASTERN CHOCTAW...EASTERN
     PUSHMATAHA AND EASTERN LATIMER

AT 1100 PM CST...DOPPLER RADAR INDICATED STRONG THUNDERSTORMS ALONG A
LINE EXTENDING FROM 11 MILES NORTHEAST OF OAK GROVE TO 5 MILES
SOUTHWEST OF COTTONWOOD TO SAWYER...MOVING EAST AT 30 MPH.

THESE STORMS WILL BE CAPABLE OF PRODUCING SMALL HAIL AND WIND GUSTS
TO 40 MPH. RESIDENTS IN THESE AREAS SHOULD REMAIN ALERT IN CASE THE
SIGNIFICANT WEATHER ALERT IS UPGRADED TO A WARNING.

A TORNADO WATCH IS ALSO IN EFFECT FOR THIS AREA UNTIL 5 AM
WEDNESDAY.

LAT...LON 3612 9346 3577 9351 3576 9368 3538 9374
      3507 9423 3496 9423 3492 9444 3451 9445
      3450 9504 3394 9514 3393 9574 3552 9486
      3565 9472 3565 9447 3586 9450 3621 9413
      3624 9386 3649 9383 3650 9329 3613 9328
TIME...MOT...LOC 0500Z 269DEG 25KT 3657 9326 3533 9458
          3402 9530

Local storm report, Feb 10, 11:38 PM CST, 6 minutes before

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Local storm report, Feb 10, 11:39 PM CST, 5 minutes before

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Local storm report, Feb 10, 11:40 PM CST, 4 minutes before

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Local storm report, Feb 10, 11:43 PM CST, 1 minute 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
Feb 10, 6:18 PM CST	Severe Thunderstorm Warning	TSA	Osage, Pawnee, Washington	57 min
Feb 10, 6:25 PM CST	Areal Flood Advisory	TSA	Nowata, Washington	2 hr
Feb 10, 6:28 PM CST	Severe Thunderstorm Warning	TSA	Nowata, Washington	47 min
Feb 10, 6:44 PM CST	Severe Thunderstorm Warning	TSA	Craig, Creek, Mayes, Nowata, Osage, Rogers and 2 more	78 min
Feb 10, 6:52 PM CST	Flash Flood Warning	TSA	Nowata, Washington	4 hr
Feb 10, 7:11 PM CST	Severe Thunderstorm Warning	TSA	Creek, Okfuskee, Okmulgee	64 min
Feb 10, 7:37 PM CST	Areal Flood Advisory	TSA	Creek, Tulsa	53 min
Feb 10, 8:55 PM CST	Special Weather Statement	TSA	Adair, Cherokee, Haskell, Latimer, McIntosh, Muskogee and 1 more	80 min
Feb 10, 9:22 PM CST	Special Weather Statement	TSA	Delaware	38 min
Feb 10, 9:46 PM CST	Special Weather Statement	TSA	Adair	74 min
Feb 10, 9:49 PM CST	Special Weather Statement	TSA	Choctaw, Haskell, Latimer, Pushmataha, Sequoyah	71 min
Feb 10, 10:18 PM CST	Severe Thunderstorm Warning	TSA	Haskell, Latimer, LeFlore, Pittsburg, Pushmataha	57 min
Feb 10, 11:00 PM CST	Special Weather Statement	TSA	Choctaw, LeFlore, Pushmataha, Sequoyah	75 min
Feb 10, 11:13 PM CST	Severe Thunderstorm Warning	TSA	Haskell, Latimer, LeFlore, Pushmataha	62 min
Feb 10, 11:35 PM CST	Areal Flood Advisory	TSA	LeFlore, Sequoyah	115 min
Feb 11, 6:24 AM CST	Wind Advisory	TSA	Craig, Creek, Delaware, Mayes, Nowata, Ottawa and 4 more	7 hr
Feb 11, 8:13 AM CST	Areal Flood Advisory	TSA	Craig, Mayes, Rogers	2 hr

Nearby

Severe Thunderstorm Warnings in Arkansas, 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.