Alert archive / Oklahoma / Severe Thunderstorm Warnings in 2007
Severe Thunderstorm Warning 329, NWS Norman, OK
NWS Norman, OK issued this severe thunderstorm warning at Jun 7, 2007, 9:12 PM CDT for Cotton 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 7, 2007, 9:12 PM CDT (02:12 UTC)
- Expired
- Jun 7, 2007, 10:00 PM CDT
- In force
- 48 min
- Issued by
- NWS Norman, OK
- Area
- Counties, with a storm outline in the text
County Cotton County, OK
The radar
The Altus AFB radar (KFDR), 56 km from the middle of the area, began a volume at 02:14 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 |
|---|---|---|---|
| Jun 7, 3:57 PM CDT | Tornado Watch | SPC | 8 hr |
The nearest sounding before it
Norman, OK (KOUN), launched 00:00Z, 2.2 hours before the alert went out and 136 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.
- Mixed-layer CAPE
- 3921 J/kg
- Mixed-layer CIN
- -14 J/kg
- Mixed-layer LCL
- 1334 m above ground
- 0-6 km bulk shear
- 48 kt
- 0-1 km storm-relative helicity
- 182 m²/s²
- 0-3 km storm-relative helicity
- 210 m²/s²
- Significant tornado parameter
- 2.7
- Supercell composite
- 21.8
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 7, 2:40 PM CDT, 6 hours 32 minutes earlier.
Area forecast discussion, Jun 7, 2:40 PM CDT, 6 hours 32 minutes before
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</html>Hazardous weather outlook, Jun 7, 8:00 PM CDT, 1 hour 12 minutes before
HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE NORMAN OK
800 PM CDT THU JUN 7 2007
OKZ004>048-050>052-TXZ083>090-081200-
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-
800 PM CDT THU JUN 7 2007
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 ACROSS MUCH OF
CENTRAL OKLAHOMA AND WESTERN NORTH TEXAS.
LOCATION...
THE SLIGHT RISK AREA IS ALONG AND EAST OF A LINE FROM PONCA CITY TO
EL RENO TO LAWTON TO SEYMOUR TEXAS.
TIMING...
SEVERE THUNDERSTORMS WILL BE POSSIBLE THROUGH THE EVENING AND
OVERNIGHT HOURS.
IMPACTS...
HAIL UP TO THE SIZE OF BASEBALLS AND WIND GUSTS TO 70 MPH ARE
POSSIBLE WITH THE MOST INTENSE STORMS. A TORNADO IS STILL POSSIBLE
WITH THE STRONGEST SUPERCELL STORMS.
RECOMMENDED ACTIONS...
STORM SPOTTER GROUPS AND EMERGENCY MANAGEMENT PERSONNEL ACROSS THE
RISK AREAS SHOULD BE PREPARED FOR SEVERE WEATHER OPERATIONS...WITH
OPERATIONS POSSIBLY LASTING WELL INTO THE NIGHT.
DISCUSSION...
A DRY LINE WILL CONTINUE TO BE THE FOCUS FOR THUNDERSTORM
DEVELOPMENT THIS EVENING. THE AIR MASS EAST OF THE DRY LINE REMAINS
VERY UNSTABLE...AND THIS COUPLED WITH MODERATE TO STRONG VERTICAL
WIND SHEAR WILL CONTINUE TO SUPPORT STORM DEVELOPMENT.
SUPERCELLS...WHICH WILL BE CAPABLE OF PRODUCING VERY LARGE HAIL...
DAMAGING STRAIGHT LINE WINDS... AND PERHAPS A TORNADO...WILL BE MOST
LIKELY BETWEEN NOW AND 10 PM NEAR AND EAST OF THE I-44 CORRIDOR FROM
WICHITA FALLS TO DUNCAN TO OKLAHOMA CITY...WITH A LOWER CHANCE OF
STORMS NORTHEASTWARD TOWARD THE STILLWATER AREA.
TOWARD AND AFTER MIDNIGHT...A COLD FRONT WILL SURGE SOUTHWARD AND
OVERTAKE THE DRY LINE. THUNDERSTORMS WILL LIKELY BECOME MORE
WIDESPREAD AS THIS OCCURS...WITH VERY LARGE HAIL AND DAMAGING WINDS
CONTINUING TO BE THE MAIN CONCERNS. THE TORNADO THREAT WILL DIMINISH
AS STORMS BECOME UNDERCUT BY COLD AIR BEHIND THE FRONT.
PROBABILITY TABLE...
VALID THROUGH 700 AM CDT FRIDAY JUN 8.
PROBABILITY OF THUNDERSTORMS OCCURRING IN THE
NWS NORMAN COUNTY WARNING AREA...100 PERCENT.
PROBABILITY OF SEVERE STORMS IF STORMS OCCUR...95 PERCENT.
OTHER HAZARDOUS WEATHER...
NONE
.DAYS TWO THROUGH SEVEN...FRIDAY THROUGH WEDNESDAY...
THUNDERSTORM OUTLOOK...
THE MENTIONED COLD FRONT IS EXPECTED TO STALL OVER NORTHERN TEXAS
FRIDAY...BEFORE MOVING BACK NORTH AS A WARM FRONT ON SATURDAY.
SEVERE WEATHER WILL BE POSSIBLE NEAR AND NORTH OF THIS BOUNDARY
FRIDAY AND SATURDAY.
OTHER HAZARDOUS WEATHER...
NONE.
THE NEXT SCHEDULED HAZARDOUS WEATHER OUTLOOK WILL BE ISSUED AT 7 AM
FRIDAY.
24/SMITHIn the hours before
Special weather statement, Jun 7, 8:04 PM CDT, 1 hour 8 minutes before
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</html>Special weather statement, Jun 7, 8:18 PM CDT, 54 minutes before
SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE NORMAN OK 818 PM CDT THU JUN 7 2007 OKZ037-TXZ086-080145- TILLMAN OK-WICHITA TX- 818 PM CDT THU JUN 7 2007 ...SIGNIFICANT WEATHER ADVISORY... THIS SIGNIFICANT WEATHER ADVISORY IS FOR TILLMAN AND WICHITA COUNTIES. A STRONG THUNDERSTORM WAS LOCATED OVER WICHITA COUNTY AT 818 PM CDT...MOVING NORTHEAST AT 20 MPH. SMALL HAIL AND WINDS AROUND 50 MPH ARE POSSIBLE. PEOPLE IN TILLMAN AND WICHITA COUNTIES SHOULD MONITOR THE WEATHER SITUATION CLOSELY. LISTEN FOR WARNINGS AND REMAIN ALERT FOR THREATENING WEATHER CONDITIONS. 30
Special weather statement, Jun 7, 8:25 PM CDT, 47 minutes before
SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE NORMAN OK 825 PM CDT THU JUN 7 2007 OKZ039-080145- STEPHENS OK- 825 PM CDT THU JUN 7 2007 ...SIGNIFICANT WEATHER ADVISORY... THIS SIGNIFICANT WEATHER ADVISORY IS FOR STEPHENS COUNTY. A STRONG THUNDERSTORM WAS LOCATED 5 MILES WEST OF CORUM AT 825 PM CDT...MOVING NORTHEAST AT 40 MPH. SMALL HAIL... WINDS AROUND 50 MPH AND FREQUENT LIGHTNING ARE POSSIBLE. PEOPLE IN STEPHENS COUNTY...INCLUDING THE CITY OF DUNCAN...SHOULD MONITOR THE WEATHER SITUATION CLOSELY. LISTEN FOR WARNINGS AND REMAIN ALERT FOR THREATENING WEATHER CONDITIONS. 30
Special weather statement, Jun 7, 8:41 PM CDT, 31 minutes before
SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE NORMAN OK 841 PM CDT THU JUN 7 2007 OKZ037-080200- TILLMAN OK- 841 PM CDT THU JUN 7 2007 ...SIGNIFICANT WEATHER ADVISORY... THIS SIGNIFICANT WEATHER ADVISORY IS FOR TILLMAN COUNTY. A STRONG THUNDERSTORM WAS LOCATED OVER TILLMAN COUNTY AT 841 PM CDT...MOVING NORTHEAST AT 30 MPH. SMALL HAIL AND WINDS AROUND 50 MPH ARE POSSIBLE. PEOPLE IN TILLMAN COUNTY SHOULD MONITOR THE WEATHER SITUATION CLOSELY. LISTEN FOR WARNINGS AND REMAIN ALERT FOR THREATENING WEATHER CONDITIONS. 30
Special weather statement, Jun 7, 9:04 PM CDT, 8 minutes before
SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE NORMAN OK 904 PM CDT THU JUN 7 2007 OKZ044-080230- COTTON OK- 904 PM CDT THU JUN 7 2007 ...SIGNIFICANT WEATHER ADVISORY... THIS SIGNIFICANT WEATHER ADVISORY IS FOR COTTON COUNTY. A STRONG THUNDERSTORM WAS LOCATED 8 MILES SOUTHWEST OF WALTERS AT 904 PM CDT...MOVING NORTHEAST AT 25 MPH. SMALL HAIL... WINDS AROUND 50 MPH AND FREQUENT LIGHTNING ARE POSSIBLE. PEOPLE IN COTTON COUNTY SHOULD MONITOR THE WEATHER SITUATION CLOSELY. LISTEN FOR WARNINGS AND REMAIN ALERT FOR THREATENING WEATHER CONDITIONS. 30
Special weather statement, Jun 7, 9:09 PM CDT, 3 minutes before
SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE NORMAN OK 909 PM CDT THU JUN 7 2007 OKZ037-080230- TILLMAN OK- 909 PM CDT THU JUN 7 2007 ...SIGNIFICANT WEATHER ADVISORY... THIS SIGNIFICANT WEATHER ADVISORY IS FOR TILLMAN COUNTY. A STRONG THUNDERSTORM WAS LOCATED 3 MILES SOUTH OF GRANDFIELD AT 909 PM CDT...MOVING NORTHEAST AT 25 MPH. SMALL HAIL AND WINDS AROUND 50 MPH ARE POSSIBLE. PEOPLE IN TILLMAN COUNTY SHOULD MONITOR THE WEATHER SITUATION CLOSELY. LISTEN FOR WARNINGS AND REMAIN ALERT FOR THREATENING WEATHER CONDITIONS. 30
The office that day
Everything else NWS Norman, OK issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jun 7, 9:50 PM CDT | Severe Thunderstorm Warning | OUN | Stephens | 40 min |
| Jun 7, 10:00 PM CDT | Severe Thunderstorm Warning | OUN | Cotton | 45 min |
| Jun 7, 10:27 PM CDT | Severe Thunderstorm Warning | OUN | Stephens | 48 min |
| Jun 7, 11:12 PM CDT | Severe Thunderstorm Warning | OUN | Stephens | 48 min |
| Jun 7, 11:47 PM CDT | Severe Thunderstorm Warning | OUN | Carter, Murray | 43 min |
Nearby
Severe Thunderstorm Warnings in Oklahoma, 2007Every severe thunderstorm warning in 2007
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.