Alert archive / Oklahoma / Severe Thunderstorm Warnings in 2005

Severe Thunderstorm Warning 641, NWS Norman, OK

January 12, 2005Atoka County, Oklahoma

NWS Norman, OK issued this severe thunderstorm warning at Jan 12, 2005, 6:16 PM CST for Atoka County, Oklahoma. It was in force for 29 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
Jan 12, 2005, 6:16 PM CST (00:16 UTC)
Expired
Jan 12, 2005, 6:45 PM CST
In force
29 min
Issued by
NWS Norman, OK
Area
Whole counties

County Atoka County, OK

The radar

The Norman radar (KTLX), 155 km from the middle of the area, began a volume at 00:18 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.

IssuedProductOfficeLasted
Jan 12, 3:05 PM CSTSevere Thunderstorm WatchSPC7 hr

The nearest sounding before it

Fort Worth, TX (KFWD), launched 00:00Z, 0.3 hours before the alert went out and 207 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, Fort Worth, TX at 00:00Z on 2005-01-13Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 128 joules per kilogram.LCLLFCEL10008507005003002001001 km2 km3 km6 km9 km12 km-30°-20°-10°0°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Fort Worth, TX at 00:00Z on 2005-01-13The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity -11 square meters per square second.1939587897117136Sfc1 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
128 J/kg
Mixed-layer CIN
-41 J/kg
Mixed-layer LCL
1404 m above ground
0-6 km bulk shear
75 kt
0-1 km storm-relative helicity
-11 m²/s²
0-3 km storm-relative helicity
128 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.1

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 Jan 12, 3:33 PM CST, 2 hours 43 minutes earlier.

Area forecast discussion, Jan 12, 3:33 PM CST, 2 hours 43 minutes before
AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE NORMAN OK
333 PM CST WED JAN 12 2005

.DISCUSSION...
STRONG UPPER LEVEL TROF MOVING FAIRLY RAPIDLY EWD FROM OK/TX
PANHANDLE REGION THRU THIS EVENING. RELATIVELY NARROW LINE OF
STRONG/LOW END SVR TSTORMS EXPECTED TO FILL IN OVER THE NEXT COUPLE
HOURS ALONG AXIS CURRENTLY DEPICTED NICELY BY AXIS OF INITAL
DEVELOPMENT JUST EAST OF LAWTON. THIS LINE SHUD EXPAND NWD/SWD FROM
CURRENT CELLS AND SWEEP EWD THRU THE EVENING. CURRENTLY..HAVE IT
TIMED TO EXIT THE FAR SE COUNTIES OF OUN CWA BY AROUND 06Z.  SHEAR
VECTOR ORIENTATION RELATIVE TO INITATION BOUNDARY SHUD RESULT IN A
SQUALL LINE..BUT COMBINATION OF STRONG LOW LEVEL SHEAR AND VERY
HUMID BOUNDARY LAYER AND NEAR -20 TEMPS AT 500 MB MAY RESULT IN SOME
EMBEDDED SUPERCELLULAR STRUCTURES AND A SMALL ATTENDANT TORNADO
THREAT..ESP ALONG AND JUST E OF I 44 CORRIDOR.  UPPER TROF AXIS TO
PIVOT ACROSS NW THIRD OF OK THIS EVENING WITH VERY COLD TEMPS ALOFT.
QUICK ONSET OF STRONG COLD ADVECTION SHUD ACT TO LIMIT PRECIP
POTENTIAL THIS AREA..BUT WILL KEEP 30 POPS FOR SOME LIGHT SNOW OR
FREEZING DRIZZLE UNDERNEATH MAIN TROF AXIS FOR MOST OF THE NIGHT.
ALSO EXPECT A 2-4 HOUR PERIOD OF RATHER STRONG WINDS ACROSS WRN OK..
AND EVENTUALLY SWD INTO N TEXAS THIS EVE BEHIND COLD FRONT WHERE
STRONG COLD ADVECTION WILL BE SUPERIMPOSED WITH 6-9 MB/3 HR PRESSURE
RISES..BUT BEST PRESSURE RISES WILL TRANSLATE SWD THRU TX
PANHANDLE.. PERHAPS LIMITING WINDS SOMEWHAT IN OUN CWA.

FORECAST FOR MUCH OF THE REMAINING SEVEN DAY PERIOD IS VERY
DIFFICULT. AS LONG AS EXPANSIVE ARCTIC AIRMASS REMAINS ACROSS MUCH
OF THE CENTRAL/NRN US /AS IT IS PROGGED TO DO THRU THE MIDDLE OF
NEXT WEEK/ THERE WILL BE PERIODIC SURGES OF SHALLOW LOW LEVEL COLD
AIR TO AFFECT MUCH OF OKLAHOMA..AND PERHAPS INTO N TEXAS. IT WILL BE
VERY DIFFICULT TO GET THE EXACT TIMING OF THESE SURGES..AND
SUBSEQUENT COLD AIR EROSION..BUT CURRENT FEELING IS THAT FAR SRN
BOUNDARY OF COLDER AIR MAY END UP FARTHER SOUTH THAN WHERE CURRENT
MODEL RUNS SUGGEST.   BEST GUESS RIGHT NOW BRINGS REINFORCING SHOT
SWD ON FRIDAY INTO NRN OK..WITH BOUNDARY THEN PRESSING SLOWLY SWD
INTO SAT.  THIS MAY BE ACCOMPANIED BY MORE FOG AND FREEZING
DRIZZLE.  ONSET OF WAA PATTERN LATE SUN/MON MAY ALSO BRING MORE FZDZ
AND FOG.  BRIEF WARM UP TUE AHEAD OF NEXT COLD AIR SURGE CURRENTLY
SCHEDULED FOR TUE NITE/WED..BUT THIS IS SUBJECT TO CHANGE. THANKS TO
SURROUNDING OFFICES AND SPC FOR COORD.
 MILLER

&&

.PRELIMINARY POINT TEMPS/POPS...
OKLAHOMA CITY OK  31  38  23  34 /  60  10  10  10
HOBART OK         30  41  25  40 /  10  10  10  10
WICHITA FALLS TX  33  44  29  43 /  50  10  10  10
GAGE OK           21  36  19  31 /  30  10  10  10
PONCA CITY OK     29  32  19  29 /  60  10  10  10
DURANT OK         38  45  30  38 /  70  10  10  10

&&

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

&&
Hazardous weather outlook, Jan 12, 4:33 PM CST, 1 hour 43 minutes before
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In the hours before

Local storm report, Jan 12, 4:31 PM CST, 1 hour 45 minutes before
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Special weather statement, Jan 12, 4:42 PM CST, 1 hour 34 minutes before
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Special weather statement, Jan 12, 4:50 PM CST, 1 hour 26 minutes before
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Special weather statement, Jan 12, 5:17 PM CST, 59 minutes before
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Special weather statement, Jan 12, 5:37 PM CST, 39 minutes before
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Special weather statement, Jan 12, 5:53 PM CST, 23 minutes before
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Nearby

Severe Thunderstorm Warnings in Oklahoma, 2005Every severe thunderstorm warning in 2005

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.