Alert archive / Oklahoma / Severe Thunderstorm Warnings in 2008

Severe Thunderstorm Warning 628, NWS Norman, OK

June 9, 2008Cleveland County, Oklahoma County, Pottawatomie County, Oklahoma

NWS Norman, OK issued this severe thunderstorm warning at Jun 9, 2008, 4:12 AM CDT for Cleveland County, Oklahoma County, Pottawatomie County, Oklahoma. It was in force for 48 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 9, 2008, 4:12 AM CDT (09:12 UTC)
Expired: Jun 9, 2008, 5:00 AM CDT
In force: 48 min
Issued by: NWS Norman, OK
Area: Storm-based polygon

Counties Cleveland County, OK, Oklahoma County, OK, Pottawatomie County, OK

The radar

The Norman radar (KTLX), 5 km from the middle of the area, began a volume at 09:15 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

Norman, OK (KOUN), launched 00:00Z, 9.2 hours before the alert went out and 19 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: 1244 J/kg
Mixed-layer CIN: -129 J/kg
Mixed-layer LCL: 1668 m above ground
0-6 km bulk shear: 33 kt
0-1 km storm-relative helicity: 96 m²/s²
0-3 km storm-relative helicity: 165 m²/s²
Significant tornado parameter: 0.1
Supercell composite: 6.8

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 Norman, OK wrote its last area forecast discussion before this severe thunderstorm warning went out at Jun 9, 2:46 AM CDT, 1 hour 26 minutes earlier.

Area forecast discussion, Jun 9, 2:46 AM CDT, 1 hour 26 minutes before

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Hazardous weather outlook, Jun 8, 11:45 AM CDT, 16 hours 27 minutes before

HAZARDOUS WEATHER OUTLOOK...CORRECTED
NATIONAL WEATHER SERVICE NORMAN OK
1145 AM CDT SUN JUN 8 2008

OKZ004>048-050>052-TXZ083>090-091300-
HARPER-WOODS-ALFALFA-GRANT-KAY-ELLIS-WOODWARD-MAJOR-GARFIELD-NOBLE-
ROGER MILLS-DEWEY-CUSTER-BLAINE-KINGFISHER-LOGAN-PAYNE-BECKHAM-
WASHITA-CADDO-CANADIAN-OKLAHOMA-LINCOLN-GRADY-MCCLAIN-CLEVELAND-
POTTAWATOMIE-SEMINOLE-HUGHES-HARMON-GREER-KIOWA-JACKSON-TILLMAN-
COMANCHE-STEPHENS-GARVIN-MURRAY-PONTOTOC-COAL-COTTON-JEFFERSON-
CARTER-JOHNSTON-ATOKA-LOVE-MARSHALL-BRYAN-HARDEMAN-FOARD-WILBARGER-
WICHITA-KNOX-BAYLOR-ARCHER-CLAY-
1145 AM CDT SUN JUN 8 2008

THIS HAZARDOUS WEATHER OUTLOOK COVERS NORTHERN...WESTERN...
CENTRAL...AND SOUTHERN OKLAHOMA...AND WESTERN NORTH TEXAS.

.DAY ONE...THIS AFTERNOON AND TONIGHT...

THUNDERSTORM OUTLOOK...
THERE IS A SLIGHT RISK OF SEVERE THUNDERSTORMS THIS AFTERNOON
THROUGH TONIGHT ACROSS PORTIONS OF OKLAHOMA AND WESTERN NORTH
TEXAS.

LOCATION...
THE SLIGHT RISK AREA IS ALONG AND NORTHWEST OF A LINE FROM
STILLWATER TO OKLAHOMA CITY TO LAWTON AND VERNON...TEXAS.

TIMING...
THE MOST LIKELY TIME FOR SEVERE THUNDERSTORMS WILL BE FROM MID
AFTERNOON INTO THE OVERNIGHT HOURS.

RECOMMENDED ACTIONS...
STORM SPOTTER GROUPS AND EMERGENCY MANAGEMENT PERSONNEL ACROSS THE
RISK AREA SHOULD PLAN FOR SEVERE WEATHER OPERATIONS.

DISCUSSION...
A STORM SYSTEM OVER THE NORTHERN AND CENTRAL ROCKIES WILL MOVE EAST
TODAY AND THEN ACROSS THE PLAINS LATE TONIGHT AND MONDAY.
MEANWHILE...A COLD FRONT WILL PUSH SLOWLY SOUTHEAST ACROSS NORTHWEST
OKLAHOMA THIS AFTERNOON.  MODERATE INSTABILITY WILL DEVELOP AHEAD OF
THE FRONT BY MID AFTERNOON AS TEMPERATURES WARM INTO THE UPPER 80S
TO LOWER 90S.  DEEP LAYER SHEAR WILL SUPPORT SUPERCELL
THUNDERSTORMS...AND STORMS THAT FORM INITIALLY WILL BE CAPABLE OF
PRODUCING LARGE HAIL...DAMAGING WINDS AND MAYBE TORNADOES.

THUNDERSTORMS MAY QUICKLY TRANSITION INTO A LINE OF STORMS WHICH
WILL REDUCE THE THREAT OF TORNADOES.  BY LATE AFTERNOON OR EARLY
EVENING THUNDERSTORMS WILL BECOME MORE NUMEROUS AND EVENTUALLY
DEVELOP INTO AT LEAST ONE COMPLEX OF THUNDERSTORMS.  STORMS
PRODUCING HEAVY RAINFALL MAY PERSIST OVER LOCAL AREAS FOR PROLONGED
PERIODS OF TIME CREATING THE POTENTIAL OF FLASH FLOODING ACROSS
MAINLY NORTHERN OKLAHOMA.

PROBABILITY TABLE...
VALID THROUGH 700 AM CDT MONDAY JUN 9.
PROBABILITY OF THUNDERSTORMS OCCURRING IN THE
              NWS NORMAN COUNTY WARNING AREA...100 PERCENT.
PROBABILITY OF SEVERE STORMS IF STORMS OCCUR...90 PERCENT.

OTHER HAZARDOUS WEATHER...
STRONG GUSTY SOUTH WINDS...WITH GUSTS TO 40 MPH AT TIMES...
WILL MAKE TRAVEL MORE DIFFICULT ON EAST AND WEST ROADS. THE
STRONGER WIND GUSTS ARE EXPECTED OVER WESTERN AND PARTS OF
CENTRAL OKLAHOMA AND WILL GRADUALLY DIMINISH DURING THE
MID TO LATE AFTERNOON.

.DAYS TWO THROUGH SEVEN...MONDAY THROUGH SATURDAY...

THUNDERSTORM OUTLOOK...
WIDESPREAD SHOWERS AND THUNDERSTORMS WILL STILL BE OCCURRING ACROSS
THE AREA ON MONDAY AND PERSIST THROUGH MONDAY NIGHT AS THE COLD
FRONT MOVES SLOWLY SOUTHEAST THROUGH OKLAHOMA AND NORTH TEXAS. THE
SLIGHT RISK OF SEVERE THUNDERSTORMS WILL STILL EXIST ON MONDAY AND
MONDAY NIGHT...MAINLY SOUTH AND EAST OF A STILLWATER TO OKLAHOMA CITY
TO VERNON...TEXAS LINE.  AFTER A DRY DAY ON TUESDAY... STORM CHANCES
RETURN ON WEDNESDAY AND CONTINUE THROUGH THURSDAY NIGHT.

OTHER HAZARDOUS WEATHER...
NONE.

THE NEXT SCHEDULED HAZARDOUS WEATHER OUTLOOK WILL BE ISSUED AT 7 AM
MONDAY.

In the hours before

Special weather statement, Jun 9, 1:52 AM CDT, 2 hours 20 minutes before

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Special weather statement, Jun 9, 2:13 AM CDT, 1 hour 59 minutes before

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE NORMAN OK
213 AM CDT MON JUN 9 2008

OKZ023-033>038-TXZ083>085-090745-
CADDO OK-JACKSON OK-KIOWA OK-GREER OK-TILLMAN OK-COMANCHE OK-
HARMON OK-HARDEMAN TX-WILBARGER TX-FOARD TX-
213 AM CDT MON JUN 9 2008

...SIGNIFICANT WEATHER ADVISORY...

THIS SIGNIFICANT WEATHER ADVISORY IS FOR CADDO...COMANCHE...FOARD...
GREER...HARDEMAN...HARMON...JACKSON...KIOWA...TILLMAN AND WILBARGER
COUNTIES.

A STRONG OUTFLOW BOUNDARY AHEAD OF SHOWERS AND THUNDERSTORMS WILL
MOVE ACROSS PARTS OF SOUTHWEST OKLAHOMA AND WESTERN NORTH TEXAS. AT
213 AM... THE OUTFLOW BOUNDARY EXTENDED ALONG A LINE FROM 3 MILES
WEST OF CARNEGIE TO GOODLETT...MOVING SOUTHEAST AT 28 MPH. WIND
GUSTS OF 40 TO 50 MPH WILL BE POSSIBLE WITH THE OUTFLOW BOUNDARY.
SHOWERS AND THUNDERSTORMS WILL THEN FOLLOW 15 TO 30 MINUTES LATER.
HEAVY RAIN AND FREQUENT CLOUD TO GROUND LIGHTNING WILL BE LIKELY
WITH THE THUNDERSTORMS.

MAXWELL

Special weather statement, Jun 9, 2:54 AM CDT, 1 hour 18 minutes before

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Local storm report, Jun 9, 3:09 AM CDT, 1 hour 3 minutes before

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Local storm report, Jun 9, 3:55 AM CDT, 17 minutes before

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Local storm report, Jun 9, 4:03 AM CDT, 9 minutes before

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The office that day

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

Issued	Product	Office	Counties	Lasted
Jun 8, 7:08 PM CDT	Severe Thunderstorm Warning	OUN	Grant, Kay	52 min
Jun 8, 7:12 PM CDT	Severe Thunderstorm Warning	OUN	Beckham, Roger Mills	48 min
Jun 8, 7:21 PM CDT	Severe Thunderstorm Warning	OUN	Alfalfa, Garfield, Major, Woods	24 min
Jun 8, 7:29 PM CDT	Tornado Warning	OUN	Roger Mills	31 min
Jun 8, 7:40 PM CDT	Severe Thunderstorm Warning	OUN	Alfalfa, Garfield, Major	50 min
Jun 8, 7:50 PM CDT	Severe Thunderstorm Warning	OUN	Roger Mills	55 min
Jun 8, 8:01 PM CDT	Tornado Warning	OUN	Beckham, Roger Mills	29 min
Jun 8, 8:09 PM CDT	Severe Thunderstorm Warning	OUN	Grant, Kay	36 min
Jun 8, 8:27 PM CDT	Severe Thunderstorm Warning	OUN	Garfield, Noble	33 min
Jun 8, 8:32 PM CDT	Severe Thunderstorm Warning	OUN	Custer, Dewey, Roger Mills	43 min
Jun 8, 8:39 PM CDT	Severe Thunderstorm Warning	OUN	Garfield, Kingfisher, Logan	36 min
Jun 8, 8:42 PM CDT	Severe Thunderstorm Warning	OUN	Kay	33 min
Jun 8, 8:54 PM CDT	Tornado Warning	OUN	Custer, Roger Mills	36 min
Jun 8, 8:59 PM CDT	Flash Flood Warning	OUN	Custer, Dewey, Roger Mills	3 hr
Jun 8, 9:16 PM CDT	Severe Thunderstorm Warning	OUN	Custer, Dewey, Roger Mills	44 min
Jun 8, 9:31 PM CDT	Severe Thunderstorm Warning	OUN	Custer	29 min
Jun 8, 9:56 PM CDT	Severe Thunderstorm Warning	OUN	Custer	35 min
Jun 8, 9:58 PM CDT	Severe Thunderstorm Warning	OUN	Ellis, Roger Mills	47 min
Jun 8, 10:27 PM CDT	Severe Thunderstorm Warning	OUN	Blaine	33 min
Jun 8, 10:41 PM CDT	Severe Thunderstorm Warning	OUN	Custer, Dewey, Ellis, Roger Mills	49 min
Jun 8, 11:02 PM CDT	Severe Thunderstorm Warning	OUN	Kiowa, Washita	43 min
Jun 8, 11:05 PM CDT	Severe Thunderstorm Warning	OUN	Greer, Harmon	40 min
Jun 8, 11:07 PM CDT	Severe Thunderstorm Warning	OUN	Dewey	38 min
Jun 8, 11:21 PM CDT	Severe Thunderstorm Warning	OUN	Kingfisher	39 min
Jun 8, 11:44 PM CDT	Severe Thunderstorm Warning	OUN	Dewey	31 min
Jun 8, 11:48 PM CDT	Severe Thunderstorm Warning	OUN	Logan, Noble, Payne	40 min
Jun 8, 11:53 PM CDT	Flash Flood Warning	OUN	Dewey, Ellis, Roger Mills, Woodward	4 hr
Jun 9, 12:03 AM CDT	Severe Thunderstorm Warning	OUN	Beckham, Ellis, Roger Mills	42 min
Jun 9, 12:40 AM CDT	Severe Thunderstorm Warning	OUN	Blaine, Dewey, Major	50 min
Jun 9, 1:03 AM CDT	Severe Thunderstorm Warning	OUN	Beckham, Greer, Harmon	42 min
Jun 9, 1:17 AM CDT	Severe Thunderstorm Warning	OUN	Alfalfa, Garfield, Major	43 min
Jun 9, 1:26 AM CDT	Flash Flood Warning	OUN	Garfield, Major	6 hr
Jun 9, 1:49 AM CDT	Severe Thunderstorm Warning	OUN	Blaine, Caddo, Canadian, Custer, Kingfisher, Washita	56 min
Jun 9, 2:02 AM CDT	Severe Thunderstorm Warning	OUN	Garfield, Major	43 min
Jun 9, 2:31 AM CDT	Tornado Warning	OUN	Canadian	29 min
Jun 9, 2:41 AM CDT	Severe Thunderstorm Warning	OUN	Caddo, Canadian, Grady, Kingfisher, Logan, Oklahoma	49 min
Jun 9, 2:51 AM CDT	Flash Flood Warning	OUN	Garfield, Noble	6 hr
Jun 9, 3:26 AM CDT	Severe Thunderstorm Warning	OUN	Canadian, Cleveland, Grady, McClain, Oklahoma	49 min
Jun 9, 4:01 AM CDT	Areal Flood Advisory	OUN	Cleveland, Oklahoma	3 hr
Jun 9, 5:50 AM CDT	Areal Flood Advisory	OUN	Pottawatomie, Seminole	115 min
Jun 9, 7:27 AM CDT	River Flood Warning	OUN	Blaine, Canadian	25 hr
Jun 9, 7:33 AM CDT	River Flood Warning	OUN	Custer, Roger Mills	13 hr
Jun 9, 8:01 AM CDT	Areal Flood Advisory	OUN	Hughes, Pontotoc, Seminole	119 min
Jun 9, 8:26 AM CDT	Areal Flood Advisory	OUN	Caddo, Canadian, Grady	3 hr
Jun 9, 8:38 AM CDT	River Flood Warning	OUN	Blaine, Caddo, Canadian, Custer	44 hr
Jun 9, 8:52 AM CDT	Areal Flood Warning	OUN	Garfield, Major, Noble	6 hr
Jun 9, 9:08 AM CDT	Areal Flood Advisory	OUN	Cleveland, McClain, Oklahoma	3 hr
Jun 9, 9:20 AM CDT	River Flood Warning	OUN	Pottawatomie, Seminole	19 hr
Jun 9, 9:57 AM CDT	Areal Flood Advisory	OUN	Pontotoc, Pottawatomie, Seminole	3 hr
Jun 9, 10:58 AM CDT	River Flood Warning	OUN	Blaine, Kingfisher, Major	14 hr
Jun 9, 11:27 AM CDT	Areal Flood Advisory	OUN	Garvin, McClain, Murray	3 hr
Jun 9, 11:47 AM CDT	Areal Flood Warning	OUN	Coal, Hughes, Pontotoc, Pottawatomie, Seminole	6 hr
Jun 9, 12:36 PM CDT	Areal Flood Warning	OUN	Atoka, Carter, Garvin, Johnston, Murray	6 hr
Jun 9, 12:50 PM CDT	River Flood Warning	OUN	Oklahoma	8 hr
Jun 9, 2:04 PM CDT	River Flood Warning	OUN	Hughes, Seminole	7 hr
Jun 9, 2:06 PM CDT	River Flood Warning	OUN	Custer, Washita	14 hr
Jun 9, 5:16 PM CDT	Areal Flood Warning	OUN	Coal, Hughes, Pontotoc, Pottawatomie, Seminole	4 hr

Nearby

Severe Thunderstorm Warnings in Oklahoma, 2008 Every severe thunderstorm warning in 2008

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.