Alert archive / Oklahoma / Severe Thunderstorm Warnings in 2009

Severe Thunderstorm Warning 534, NWS Norman, OK

July 16, 2009Kingfisher County, Logan County, Oklahoma

NWS Norman, OK issued this severe thunderstorm warning at Jul 16, 2009, 3:31 PM CDT for Kingfisher County, Logan County, Oklahoma. It was in force for 59 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 16, 2009, 3:31 PM CDT (20:31 UTC)
Expired
Jul 16, 2009, 4:30 PM CDT
In force
59 min
Issued by
NWS Norman, OK
Area
Storm-based polygon

Counties Kingfisher County, OK, Logan County, OK

The radar

The Norman radar (KTLX), 76 km from the middle of the area, began a volume at 20:31 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 12:00Z, 8.5 hours before the alert went out and 79 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-pSkew-T log-p diagram, Lamont, OK at 12:00Z on 2009-07-16Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 0 joules per kilogram.LCL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°0°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Lamont, OK at 12:00Z on 2009-07-16The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity -48 square meters per square second.193958Sfc1 km3 km6 km9 kmRMLM
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
0 J/kg
Mixed-layer CIN
No buoyant parcel
Mixed-layer LCL
2015 m above ground
0-6 km bulk shear
35 kt
0-1 km storm-relative helicity
-48 m²/s²
0-3 km storm-relative helicity
129 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

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 Jul 16, 12:57 PM CDT, 2 hours 34 minutes earlier.

Area forecast discussion, Jul 16, 12:57 PM CDT, 2 hours 34 minutes before
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Hazardous weather outlook, Jul 16, 11:37 AM CDT, 3 hours 54 minutes before
HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE NORMAN OK
1137 AM CDT THU JUL 16 2009

OKZ004>048-050>052-TXZ083>090-171200-
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-
1137 AM CDT THU JUL 16 2009

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

.DAY ONE...TODAY AND TONIGHT...

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

LOCATION...
THE SLIGHT RISK AREA INCLUDES ALL OF WESTERN NORTH TEXAS AND ALL OF
NORTHERN... WESTERN... CENTRAL... AND SOUTHERN OKLAHOMA.

TIMING...
THE MOST LIKELY TIME FOR SEVERE THUNDERSTORMS WILL BE FROM THIS
AFTERNOON THROUGH 2 AM.

IMPACTS...
DAMAGING WIND GUSTS TO 75 MPH AND HAIL TO THE SIZE OF GOLFBALLS WILL
BE THE MAIN CONCERN.

RECOMMENDED ACTIONS...
STORM SPOTTER GROUPS AND EMERGENCY MANAGEMENT PERSONNEL ACROSS THE
RISK AREA SHOULD PLAN FOR SEVERE WEATHER OPERATIONS BEGINNING THIS
EVENING AND CONTINUING INTO THE OVERNIGHT HOURS.

DISCUSSION...
SCATTERED SHOWERS AND THUNDERSTORMS WILL BE POSSIBLE THIS AFTERNOON
ACROSS PORTIONS OF OKLAHOMA. THERE IS ENOUGH INSTABILITY IN THE MID
LEVELS OF THE ATMOSPHERE TO SUPPORT AN ISOLATED SEVERE THUNDERSTORM.

HIGHER CHANCES OF SEVERE THUNDERSTORMS WILL OCCUR BEGINNING THIS
EVENING. A COMPLEX OF THUNDERSTORMS IS MOVING THROUGH NORTHERN
KANSAS LATE THURSDAY MORNING AND MAY MOVE INTO NORTHERN OKLAHOMA
LATE THIS AFTERNOON OR EARLY THIS EVENING. OTHER THUNDERSTORMS ARE
LIKELY TO FORM THIS AFTERNOON OVER THE CENTRAL HIGH PLAINS... AND
DEVELOP INTO A LARGER COMPLEX OF STORMS THIS EVENING. AS THE
THUNDERSTORM COMPLEXES MOVE SOUTH OR SOUTHEAST ACROSS THE AREA THIS
EVENING AND OVERNIGHT... LARGE HAIL AND DAMAGING WINDS WILL BE
POSSIBLE.

PROBABILITY TABLE...
VALID THROUGH 700 AM CDT FRIDAY JUL 17.
PROBABILITY OF THUNDERSTORMS OCCURRING IN THE
              NWS NORMAN COUNTY WARNING AREA...100 PERCENT.
PROBABILITY OF SEVERE STORMS IF STORMS OCCUR...60 PERCENT.

OTHER HAZARDOUS WEATHER...
HOT TEMPERATURES AND HIGH HUMIDITY WILL COMBINE TO PRODUCE DANGEROUS
HEAT INDICES OVER PARTS OF WESTERN NORTH TEXAS AND SOUTHERN
OKLAHOMA. A HEAT ADVISORY REMAINS IN EFFECT TODAY FOR THESE AREAS.
PLEASE REFER TO THE LATEST VERSION OF THIS PRODUCT FOR MORE
INFORMATION.

.DAYS TWO THROUGH SEVEN...FRIDAY THROUGH WEDNESDAY...

THUNDERSTORM OUTLOOK...
THERE WILL BE AT LEAST A SLIGHT CHANCE OF THUNDERSTORMS THROUGH
WEDNESDAY. THE WEATHER PATTERN FOR THE WEEKEND AND EARLY NEXT WEEK
WILL FAVOR NIGHTTIME STORM COMPLEXES... BUT SCATTERED STORMS WILL BE
POSSIBLE EACH AFTERNOON AND EVENING AS WELL.

OTHER HAZARDOUS WEATHER...
NONE.

THE NEXT SCHEDULED HAZARDOUS WEATHER OUTLOOK WILL BE ISSUED BY 5 AM
FRIDAY JULY 17.

In the hours before

Special weather statement, Jul 16, 2:18 PM CDT, 1 hour 13 minutes before
SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE NORMAN OK
218 PM CDT THU JUL 16 2009

OKZ007-161930-
GRANT OK-
218 PM CDT THU JUL 16 2009

...SIGNIFICANT WEATHER ADVISORY...

THIS SIGNIFICANT WEATHER ADVISORY IS FOR GRANT COUNTY.

A STRONG THUNDERSTORM WAS LOCATED 5 MILES SOUTH OF WAKITA AT 218 PM
CDT...MOVING SOUTHEAST AT 20 MPH.

SMALL HAIL AND WINDS AROUND 50 MPH ARE POSSIBLE.

PEOPLE IN GRANT COUNTY SHOULD MONITOR THE WEATHER SITUATION CLOSELY.
LISTEN FOR WARNINGS AND REMAIN ALERT FOR THREATENING WEATHER
CONDITIONS.

..SPEG.

The office that day

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

IssuedProductOfficeCountiesLasted
Jul 15, 10:22 PM CDTSevere Thunderstorm WarningOUNPayne35 min
Jul 15, 11:31 PM CDTSevere Thunderstorm WarningOUNGrant, Kay59 min
Jul 15, 11:40 PM CDTAreal Flood AdvisoryOUNEllis3 hr
Jul 16, 12:10 AM CDTSevere Thunderstorm WarningOUNGarfield, Grant, Kay, Noble65 min
Jul 16, 12:58 AM CDTAreal Flood AdvisoryOUNKay4 hr
Jul 16, 1:11 AM CDTSevere Thunderstorm WarningOUNLincoln, Noble, Payne64 min
Jul 16, 3:43 PM CDTSevere Thunderstorm WarningOUNCarter, Jefferson, Love62 min
Jul 16, 4:23 PM CDTSevere Thunderstorm WarningOUNOklahoma52 min
Jul 16, 4:27 PM CDTSevere Thunderstorm WarningOUNJefferson, Love63 min
Jul 16, 4:43 PM CDTSevere Thunderstorm WarningOUNCarter, Murray38 min
Jul 16, 4:46 PM CDTSevere Thunderstorm WarningOUNHughes, Seminole37 min
Jul 16, 4:47 PM CDTSevere Thunderstorm WarningOUNAtoka, Coal, Johnston58 min
Jul 16, 4:56 PM CDTSevere Thunderstorm WarningOUNCleveland64 min
Jul 16, 5:09 PM CDTSevere Thunderstorm WarningOUNOklahoma36 min
Jul 16, 5:27 PM CDTSevere Thunderstorm WarningOUNCuster, Washita48 min
Jul 16, 5:33 PM CDTSevere Thunderstorm WarningOUNCleveland, Pottawatomie34 min
Jul 16, 6:12 PM CDTSevere Thunderstorm WarningOUNCuster, Washita48 min
Jul 16, 6:35 PM CDTSevere Thunderstorm WarningOUNKiowa, Washita40 min

Nearby

Severe Thunderstorm Warnings in Oklahoma, 2009Every 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.