Alert archive / Oklahoma / Severe Thunderstorm Warnings in 2007

Severe Thunderstorm Warning 581, NWS Norman, OK

September 26, 2007Greer County, Kiowa County, Washita County, Oklahoma

NWS Norman, OK issued this severe thunderstorm warning at Sep 26, 2007, 9:37 PM CDT for Greer County, Kiowa County, Washita County, Oklahoma. It was in force for 38 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
Sep 26, 2007, 9:37 PM CDT (02:37 UTC)
Expired
Sep 26, 2007, 10:15 PM CDT
In force
38 min
Issued by
NWS Norman, OK
Area
Counties, with a storm outline in the text

Counties Greer County, OK, Kiowa County, OK, Washita County, OK

The radar

The Altus AFB radar (KFDR), 78 km from the middle of the area, began a volume at 02:37 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

Amarillo Airport, TX (KAMA), launched 00:00Z, 2.6 hours before the alert went out and 230 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, Amarillo Airport, TX at 00:00Z on 2007-09-27Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 622 joules per kilogram.LCLLFCEL10008507005003002001001 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, Amarillo Airport, TX at 00:00Z on 2007-09-27The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 43 square meters per square second.1939587897117Sfc1 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
622 J/kg
Mixed-layer CIN
-40 J/kg
Mixed-layer LCL
2074 m above ground
0-6 km bulk shear
35 kt
0-1 km storm-relative helicity
43 m²/s²
0-3 km storm-relative helicity
82 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.7

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 Norman, OK wrote its last area forecast discussion before this severe thunderstorm warning went out at Sep 26, 3:20 PM CDT, 6 hours 17 minutes earlier.

Area forecast discussion, Sep 26, 3:20 PM CDT, 6 hours 17 minutes before
AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE NORMAN OK
320 PM CDT WED SEP 26 2007

.DISCUSSION...
ALTHOUGH THE PRECIP HAS ENDED AS DEEPER MOISTURE GETS PUSHED EAST OF
THE AREA... THE LOW CLOUDS HAVE BEEN MORE PERSISTENT ACROSS
SOUTHEAST QUARTER OF AREA THIS AFTN. SHOULD CONT TO SEE EROSION OF
THESE CLOUDS EARLY THIS EVENING LEADING TO GOOD RADIATIONAL COOLING
WITH LIGHT WINDS. WILL LIKELY SEE SOME PATCHY FOG AND PERHAPS
STRATUS REDEVELOP ACROSS PARTS OF THE AREA LATE TONIGHT LINGERING INTO
THU MORNING. MAY ALSO SEE A FEW SHWRS/TSTMS TO OUR WEST THIS EVENING
AS LLJ/WAA DEVELOP. A FEW OF THESE MAY MOVE INTO WESTERN PORTIONS OF
THE AREA OVERNIGHT.

WILL KEEP LOW POPS GOING ACROSS WESTERN SECTIONS ON THU/THU NIGHT IN
CLOSER PROXIMITY TO SLIGHTLY BETTER MOISTURE AND STRONGER FLOW. WILL
KEEP FRI AND MUCH OF SAT DRY AS STRONGER WAVE MOVES INTO PACIFIC NW.
STILL SOME DIFFERENCES IN MODELS AS TO TIMING AND LOCATION OF THE
WAVE AS IT MOVES EAST ACROSS THE PLAINS. 12Z GFS DOES SLOW WAVE DOWN
A LITTLE... BUT DOES KEEP MOST OF THE BETTER FORCING WELL NORTH OF
OKLAHOMA AND NORTH TEXAS. GFS BRINGS SFC FRONT INTO NW OK SAT NIGHT
AND THEN ACROSS MUCH OF THE AREA ON SUN. WILL INCREASE PARTS OF THE
AREA TO LOW END CHANCE POPS FOR THIS TIMEFRAME.

THROUGH THE FIRST HALF OF NEXT WEEK THE PATTERN REMAINS
PROGRESSIVE... BUT ACTIVE WITH SEVERAL WAVES MOVING ACROSS THE
CONUS. AT THIS TIME MOST CONT TO MOVE ACROSS CENTRAL AND NORTHERN
PLAINS WITH SOUTHERN PLAINS RECEIVING A GLANCING BLOW. THIS WILL
KEEP SFC BOUNDARIES PENETRATING INTO THE AREA AND THEN STALLING AND
WASHING OUT IN THE VICINITY OF OK/N TX... WHICH WILL KEEP AT LEAST
SOME OPPORTUNITY FOR PRECIP IN THE FORECAST MOST PERIODS.

&&

.PRELIMINARY POINT TEMPS/POPS...
OKLAHOMA CITY OK  61  86  60  86 /  10  10  10  10
HOBART OK         62  87  62  87 /  20  20  20  10
WICHITA FALLS TX  65  89  66  89 /  20  10  10  10
GAGE OK           57  86  60  87 /  20  20  20  10
PONCA CITY OK     56  85  57  86 /  10  10  10  10
DURANT OK         65  87  62  87 /  10  10  10   0

&&

.OUN WATCHES/WARNINGS/ADVISORIES...
OK...NONE.
TX...NONE.
&&

22/30
Hazardous weather outlook, Sep 26, 8:25 PM CDT, 1 hour 12 minutes before
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In the hours before

Special weather statement, Sep 26, 8:30 PM CDT, 1 hour 7 minutes before
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Local storm report, Sep 26, 8:39 PM CDT, 58 minutes before
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Local storm report, Sep 26, 8:46 PM CDT, 51 minutes before
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Local storm report, Sep 26, 9:01 PM CDT, 36 minutes before
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Special weather statement, Sep 26, 9:23 PM CDT, 14 minutes before
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Local storm report, Sep 26, 9:35 PM CDT, 2 minutes before
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The office that day

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

IssuedProductOfficeCountiesLasted
Sep 26, 7:12 PM CDTSevere Thunderstorm WarningOUNRoger Mills48 min
Sep 26, 8:00 PM CDTSevere Thunderstorm WarningOUNBeckham, Roger Mills30 min
Sep 26, 8:20 PM CDTSevere Thunderstorm WarningOUNBeckham, Roger Mills25 min
Sep 26, 8:39 PM CDTSevere Thunderstorm WarningOUNBeckham, Greer, Kiowa, Washita66 min
Sep 26, 9:40 PM CDTSevere Thunderstorm WarningOUNBeckham50 min
Sep 26, 10:12 PM CDTSevere Thunderstorm WarningOUNKiowa33 min
Sep 26, 10:35 PM CDTSevere Thunderstorm WarningOUNComanche, Kiowa25 min
Sep 26, 11:34 PM CDTSevere Thunderstorm WarningOUNComanche, Kiowa26 min
Sep 27, 12:02 AM CDTSevere Thunderstorm WarningOUNComanche, Tillman43 min
Sep 27, 5:12 AM CDTDense Fog AdvisoryOUNAlfalfa, Atoka, Blaine, Bryan, Canadian, Carter and 24 more5 hr
Sep 27, 6:57 PM CDTSevere Thunderstorm WarningOUNHarmon, Jackson48 min
Sep 27, 6:19 PM CDTSevere Thunderstorm WarningOUNHardeman41 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.