Alert archive / Oklahoma / Severe Thunderstorm Warnings in 2009

Severe Thunderstorm Warning 260, NWS Tulsa, OK

June 8, 20094 counties in Oklahoma

NWS Tulsa, OK issued this severe thunderstorm warning at Jun 8, 2009, 5:48 AM CDT for 4 counties in Oklahoma. It was in force for 57 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: Jun 8, 2009, 5:48 AM CDT (10:48 UTC)
Expired: Jun 8, 2009, 6:45 AM CDT
In force: 57 min
Issued by: NWS Tulsa, OK
Area: Storm-based polygon

Counties Osage County, OK, Rogers County, OK, Tulsa County, OK, Wagoner County, OK

The radar

The Tulsa radar (KINX), 29 km from the middle of the area, began a volume at 10:48 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

Lamont, OK (KLMN), launched 00:00Z, 10.8 hours before the alert went out and 149 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: 2606 J/kg
Mixed-layer CIN: -165 J/kg
Mixed-layer LCL: 1845 m above ground
0-6 km bulk shear: 42 kt
0-1 km storm-relative helicity: 67 m²/s²
0-3 km storm-relative helicity: 183 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 3.7

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 Jun 8, 3:54 AM CDT, 1 hour 54 minutes earlier.

Area forecast discussion, Jun 8, 3:54 AM CDT, 1 hour 54 minutes before

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Hazardous weather outlook, Jun 8, 5:04 AM CDT, 44 minutes before

HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE TULSA OK
504 AM CDT MON JUN 8 2009

ARZ001-002-010-011-019-020-029-OKZ049-053>076-091000-
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-
504 AM CDT MON JUN 8 2009

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

.DAY ONE...TODAY AND TONIGHT.

SEVERE THUNDERSTORM.
RISK...LIMITED.
AREA...EASTERN OKLAHOMA AND NORTHWEST ARKANSAS.
ONSET...ONGOING AND THEN AGAIN LATE THIS AFTERNOON
        AND EVENING.

DISCUSSION...
SCATTERED THUNDERSTORMS DEVELOPED OVERNIGHT ACROSS NORTHEAST
OKLAHOMA AS AN UPPER LEVEL DISTURBANCE MOVED ACROSS THE
CENTRAL PLAINS AND THE LOW LEVEL JET INTENSIFIED OVER
THE REGION. THIS THUNDERSTORM ACTIVITY IS EXPECTED TO
LAST UNTIL MID-MORNING WHEN THE LOW LEVEL JET WEAKENS.
SOME OF THESE STORMS COULD BE STRONG TO SEVERE WITH
LARGE HAIL AND WIND GUSTS TO 60 MPH POSSIBLE.

ADDITIONAL THUNDERSTORMS ARE POSSIBLE LATER THIS AFTERNOON
AND EVENING AS A COLD FRONT WORKS INTO THE REGION FROM
THE NORTH. A STRONG CAP WILL HOLD THE THUNDERSTORM ACTIVITY
AT BAY FOR MUCH OF THE AFTERNOON. HOWEVER...SCATTERED
THUNDERSTORMS WILL BE POSSIBLE BY LATE AFTERNOON INTO
TONIGHT IN THE VICINITY OF THE COLD FRONT. WITH A
MODERATELY UNSTABLE AIRMASS IN PLACE AND ADEQUATE DEEP
LAYER SHEAR...THESE STORMS WILL ALSO HAVE THE POTENTIAL
TO BECOME SEVERE. LARGE HAIL AND STRONG GUSTY WINDS WILL
AGAIN BE THE MAIN CONCERN.

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

.DAYS TWO THROUGH SEVEN...TUESDAY THROUGH SUNDAY.
TUESDAY...THUNDERSTORM POTENTIAL.
WEDNESDAY...SEVERE THUNDERSTORM POTENTIAL...HEAVY RAIN POTENTIAL.
THURSDAY...SEVERE THUNDERSTORM POTENTIAL.
FRIDAY...THUNDERSTORM POTENTIAL.
SATURDAY...THUNDERSTORM POTENTIAL.
SUNDAY...THUNDERSTORM POTENTIAL.

EXTENDED DISCUSSION...
A PERIOD OF UNSETTLED WEATHER IS ON TAP FOR EASTERN OKLAHOMA
AND NORTHWEST ARKANSAS THIS WEEK AS A FRONTAL BOUNDARY
LINGERS ACROSS THE REGION AND SERIES OF UPPER LEVEL DISTURBANCES
MOVE ACROSS THE PLAINS. WHILE MOST OF THE THUNDERSTORM ACTIVITY
IS EXPECTED TO BE DIURNAL IN NATURE...IT IS LOOKING MORE LIKELY
THAT A THUNDERSTORM COMPLEX WILL MOVE ACROSS THE AREA WEDNESDAY
NIGHT INTO THURSDAY. THE AIRMASS ACROSS THE REGION WILL BE UNSTABLE
ENOUGH TO SUPPORT STRONG TO SEVERE THUNDERSTORMS EVERY DAY THIS
WEEK WITH LARGE HAIL AND STRONG GUSTY WINDS THE CONCERN. LOCALLY
HEAVY RAIN WILL ALSO POSE A PROBLEM WEDNESDAY NIGHT IN ASSOCIATION
WITH THE EXPECTED THUNDERSTORM COMPLEX.

EMERGENCY MANAGEMENT PLANNING STATEMENT...
EMERGENCY MANAGEMENT OFFICIALS SHOULD BE PREPARED FOR A PERIOD
OF UNSETTLED WEATHER THAT WILL INCLUDE SEVERAL ROUNDS SEVERE
THUNDERSTORMS.

WWW.SRH.NOAA.GOV/TULSA CONTAINS ADDITIONAL INFORMATION.

In the hours before

Special weather statement, Jun 8, 4:26 AM CDT, 1 hour 22 minutes before

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE TULSA OK
426 AM CDT MON JUN 8 2009

OKZ054-059-081030-
OSAGE OK-PAWNEE OK-
426 AM CDT MON JUN 8 2009

...SIGNIFICANT WEATHER ALERT...

THE NATIONAL WEATHER SERVICE IN TULSA HAS ISSUED A
SIGNIFICANT WEATHER ALERT EFFECTIVE UNTIL 530 AM CDT
FOR THE FOLLOWING COUNTIES...

IN NORTHEAST OKLAHOMA
     SOUTHERN OSAGE AND PAWNEE

AT 427 AM CDT...DOPPLER RADAR INDICATED STRONG THUNDERSTORMS ALONG A
LINE EXTENDING FROM 8 MILES NORTHWEST OF HOMINY TO PAWNEE...MOVING
EAST AT 40 MPH. SOME LOCATIONS THAT WILL BE AFFECTED BY THESE STORMS
INCLUDE...OSAGE...HOMINY...WYNONA...BARNSDALL...PERSHING...TALLANT...
NELAGONEY...OKESA...PAWNEE...HALLETT...MARAMEC...BLACKBURN...SKEDEE
AND CLEVELAND.

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.

LAT...LON 3675 9607 3633 9609 3616 9682 3625 9683
      3625 9685 3641 9690
TIME...MOT...LOC 0927Z 259DEG 33KT 3649 9649 3633 9682

Special weather statement, Jun 8, 4:35 AM CDT, 1 hour 13 minutes before

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE TULSA OK
435 AM CDT MON JUN 8 2009

OKZ064-081000-
CREEK OK-
435 AM CDT MON JUN 8 2009

...SIGNIFICANT WEATHER ALERT...

THE NATIONAL WEATHER SERVICE IN TULSA HAS ISSUED A
SIGNIFICANT WEATHER ALERT EFFECTIVE UNTIL 500 AM CDT
FOR THE FOLLOWING COUNTY...

IN NORTHEAST OKLAHOMA
     NORTHWESTERN CREEK

AT 435 AM CDT...DOPPLER RADAR INDICATED A STRONG THUNDERSTORM 5 MILES
WEST OF DRUMRIGHT...MOVING EAST AT 35 MPH. SOME LOCATIONS THAT WILL
BE AFFECTED BY THIS STORM INCLUDE...SHAMROCK...DRUMRIGHT...OILTON AND
SILVER CITY.

THIS STORM WILL BE CAPABLE OF PRODUCING SMALL HAIL AND WIND GUSTS TO
40 MPH.

LAT...LON 3614 9630 3609 9630 3608 9627 3593 9623
      3589 9662 3589 9663 3608 9663
TIME...MOT...LOC 0935Z 260DEG 28KT 3598 9669

Special weather statement, Jun 8, 5:10 AM CDT, 38 minutes before

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE TULSA OK
510 AM CDT MON JUN 8 2009

OKZ054-055-059-060-081045-
OSAGE OK-PAWNEE OK-TULSA OK-WASHINGTON OK-
510 AM CDT MON JUN 8 2009

...SIGNIFICANT WEATHER ALERT...

THE NATIONAL WEATHER SERVICE IN TULSA HAS ISSUED A
SIGNIFICANT WEATHER ALERT EFFECTIVE UNTIL 545 AM CDT
FOR THE FOLLOWING COUNTIES...

IN NORTHEAST OKLAHOMA
     SOUTHERN WASHINGTON...SOUTHEASTERN OSAGE...TULSA AND PAWNEE

AT 511 AM CDT...DOPPLER RADAR INDICATED STRONG THUNDERSTORMS ALONG A
LINE EXTENDING FROM 7 MILES NORTHEAST OF OSAGE TO TERLTON...MOVING
EAST AT 35 MPH. SOME LOCATIONS THAT WILL BE AFFECTED BY THESE STORMS
INCLUDE...TULSA...OSAGE...SAND SPRINGS...SPERRY...SKIATOOK...VERA...
TERLTON AND WESTPORT.

THESE STORMS WILL BE CAPABLE OF PRODUCING SMALL HAIL AND WIND GUSTS
TO 40 MPH.

LAT...LON 3619 9657 3641 9634 3645 9582 3643 9581
      3613 9603 3616 9628 3617 9627 3617 9636
TIME...MOT...LOC 1011Z 264DEG 29KT 3636 9630 3621 9647

The office that day

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

Issued	Product	Office	Counties	Lasted
Jun 7, 11:33 PM CDT	Special Weather Statement	TSA	Okfuskee, Okmulgee, Pittsburg	57 min
Jun 8, 1:59 AM CDT	Severe Thunderstorm Warning	TSA	Osage, Pawnee	56 min
Jun 8, 4:26 AM CDT	Special Weather Statement	TSA	Pawnee	64 min
Jun 8, 4:35 AM CDT	Special Weather Statement	TSA	Creek	25 min
Jun 8, 5:10 AM CDT	Special Weather Statement	TSA	Tulsa	35 min
Jun 8, 6:26 AM CDT	Severe Thunderstorm Warning	TSA	Cherokee, Mayes, Rogers, Tulsa, Wagoner	49 min
Jun 8, 7:10 AM CDT	Severe Thunderstorm Warning	TSA	Cherokee, Mayes, Muskogee, Wagoner	50 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.