Alert archive / Texas / Severe Thunderstorm Warnings in 2004

Severe Thunderstorm Warning 259, NWS Norman, OK

May 13, 2004Knox County, Texas

NWS Norman, OK issued this severe thunderstorm warning at May 13, 2004, 11:41 AM CDT for Knox County, Texas. It was in force for 49 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: May 13, 2004, 11:41 AM CDT (16:41 UTC)
Expired: May 13, 2004, 12:30 PM CDT
In force: 49 min
Issued by: NWS Norman, OK
Area: Counties, with a storm outline in the text

County Knox County, TX

The radar

The Altus AFB radar (KFDR), 110 km from the middle of the area, began a volume at 16:41 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
May 13, 10:45 AM CDT	Severe Thunderstorm Watch	SPC	6 hr

The nearest sounding before it

Fort Sill, OK (KFSI), launched 12:00Z, 4.7 hours before the alert went out and 169 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: 2125 J/kg
Mixed-layer CIN: -154 J/kg
Mixed-layer LCL: 869 m above ground
0-6 km bulk shear: 11 kt
0-1 km storm-relative helicity: 79 m²/s²
0-3 km storm-relative helicity: 53 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 May 13, 3:22 AM CDT, 8 hours 19 minutes earlier.

Area forecast discussion, May 13, 3:22 AM CDT, 8 hours 19 minutes before

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Hazardous weather outlook, May 13, 7:00 AM CDT, 4 hours 41 minutes before

HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE NORMAN OK
700 AM CDT THU MAY 13 2004

OKZ004>048-050>052-TXZ083>090-131700-

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 TODAY AND TONIGHT
OVER PORTIONS OF OKLAHOMA AND WESTERN NORTH TEXAS.

LOCATION...
THE SLIGHT RISK AREA COVERS ALL LOCATIONS SOUTH OF A LINE EXTENDING
FROM QUANAH TEXAS...TO HOBART...TO KINGFISHER...TO PONCA CITY.

TIMING...
THE MOST LIKELY TIME FOR ORGANIZED SEVERE THUNDERSTORMS WILL BE FROM
EARLY THIS AFTERNOON THROUGH THIS EVENING. HOWEVER...THUNDERSTORMS
ARE EXPECTED TO CONTINUE DEVELOPING THROUGH THIS MORNING...AND A FEW
OF THESE MAY BECOME SEVERE...WITH HAIL THE PRIMARY CONCERN.

IMPACTS...
VERY LARGE HAIL IS POSSIBLE AGAIN TODAY...PERHAPS TENNIS BALL SIZE
OR LARGER. THERE WILL ALSO BE A LOW PROBABILITY OF TORNADOES...
PARTICULARLY ACROSS SOUTHERN OKLAHOMA AND WESTERN NORTH TEXAS...
SOUTH OF THE COLD FRONT AND EAST OF A SURFACE LOW PRESSURE AREA.
THESE IMPACTS WOULD MOST LIKELY BE SEEN DURING THE AFTERNOON THROUGH
EARLY EVENING HOURS.

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

DISCUSSION...
A COLD FRONT WILL MOVE SOUTHWARD OVER OKLAHOMA AND WESTERN NORTH
TEXAS TODAY AND TONIGHT. BY AFTERNOON...THE FRONT WILL EXTEND FROM
EXTREME SOUTHWEST OKLAHOMA...THROUGH CENTRAL OKLAHOMA. THIS COLD
FRONT WILL CATCH UP WITH A DRY LINE IN THE VICINITY OF SOUTHWEST
OKLAHOMA OR WESTERN NORTH TEXAS BY EARLY AFTERNOON. NEAR THIS
INTERSECTION...AN AREA OF LOW PRESSURE IS ALSO EXPECTED TO DEVELOP.
MOST OF THE SEVERE WEATHER TODAY WILL BE SEEN NEAR AND EAST OF THE
COLD FRONT AND DRY LINE INTERSECTION...BUT SEVERE STORMS WILL ALSO
CONTINUE TO FORM ALONG AND BEHIND THE COLD FRONT...FURTHER NORTHEAST
INTO CENTRAL AND NORTHERN OKLAHOMA. THE STRONGEST STORMS TODAY WILL
BE CAPABLE OF PRODUCING VERY LARGE HAIL DUE TO HIGH LEVELS OF
INSTABILITY...AND STORMS NEAR AND EAST OF THE MENTIONED INTERSECTION
WILL ALSO BE IN AN AREA OF TORNADO POTENTIAL. DURING THE EVENING...
INSTABILITY WILL DECREASE AND MUCH OF THE THUNDERSTORM ACTIVITY WILL
BEGIN TO SHIFT SOUTHWARD INTO THE MAIN BODY OF TEXAS.

PROBABILITY TABLE...
VALID THROUGH 700 AM CDT FRIDAY MAY 14.
PROBABILITY OF THUNDERSTORMS OCCURRING IN THE
              NWS NORMAN COUNTY WARNING AREA...100 PERCENT.
PROBABILITY OF SEVERE STORMS IF STORMS OCCUR...100 PERCENT.

OTHER HAZARDOUS WEATHER...
LOCALLY HEAVY RAINFALL IS EXPECTED LATE THIS AFTERNOON THROUGH
TONIGHT...PRIMARILY OVER SOUTHERN OKLAHOMA AND PARTS OF WESTERN
NORTH TEXAS. RAINFALL TOTAL OF 2 TO 4 INCHES...WITH LOCALLY HIGHER
AMOUNTS...WILL BE POSSIBLE IN THESE AREAS.

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

THUNDERSTORM OUTLOOK...
LINGERING THUNDERSTORMS WILL MOVE OUT OF EXTREME SOUTHERN OKLAHOMA
AND WESTERN NORTH TEXAS EARLY FRIDAY. THE MAIN CONCERN FROM ANY
STORMS FRIDAY MORNING WILL BE CONTINUED HEAVY RAINFALL. THERE WILL
BE A CHANCE FOR THUNDERSTORMS TO RETURN TO THE AREA SUNDAY THROUGH
TUESDAY. SOUTHERLY WINDS WILL RETURN...ALLOWING FOR MOISTURE
RETURN...AND MORE MID LEVEL DISTURBANCES APPROACH THE SOUTHERN
PLAINS.

OTHER HAZARDOUS WEATHER...
NONE.

THE NEXT SCHEDULED HAZARDOUS WEATHER OUTLOOK WILL BE ISSUED AT NOON
TODAY.

11

In the hours before

Special weather statement, May 13, 11:17 AM CDT, 24 minutes before

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE NORMAN OK
1117 AM CDT THU MAY 13 2004

OKZ019-131630-
LOGAN OK-
1117 AM CDT THU MAY 13 2004

...SIGNIFICANT WEATHER ADVISORY...

THIS SIGNIFICANT WEATHER ADVISORY IS FOR LOGAN COUNTY.

A STRONG THUNDERSTORM WAS LOCATED OVER MARSHALL AT 1117 AM CDT...
MOVING EAST AT 10 MPH.

STORM INTENSITY IS INCREASING AND SEVERE WEATHER MAY DEVELOP RAPIDLY.

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

JAMES

Special weather statement, May 13, 11:25 AM CDT, 16 minutes before

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE NORMAN OK
1125 AM CDT THU MAY 13 2004

TXZ085-131645-
WILBARGER TX-
1125 AM CDT THU MAY 13 2004

...SIGNIFICANT WEATHER ADVISORY...

THIS SIGNIFICANT WEATHER ADVISORY IS FOR WILBARGER COUNTY.

A STRONG THUNDERSTORM WAS LOCATED 3 MILES WEST OF LOCKETT AT 1125 AM
CDT...MOVING NORTHEAST AT 25 MPH. HALF INCH HAIL IS POSSIBLE WITH
THIS STORM.

STORM INTENSITY IS INCREASING AND SEVERE WEATHER MAY DEVELOP RAPIDLY.

30

Special weather statement, May 13, 11:26 AM CDT, 15 minutes before

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE NORMAN OK
1126 AM CDT THU MAY 13 2004

OKZ028-131645-
MCCLAIN OK-
1126 AM CDT THU MAY 13 2004

...SIGNIFICANT WEATHER ADVISORY...

THIS SIGNIFICANT WEATHER ADVISORY IS FOR MCCLAIN COUNTY.

A STRONG THUNDERSTORM WAS LOCATED 7 MILES SOUTH OF CRINER AT 1126 AM
CDT...MOVING NORTHEAST AT 25 MPH.

STORM INTENSITY IS INCREASING AND SEVERE WEATHER MAY DEVELOP RAPIDLY.

30

Special weather statement, May 13, 11:28 AM CDT, 13 minutes before

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE NORMAN OK
1128 AM CDT THU MAY 13 2004

OKZ050-131645-
LOVE OK-
1128 AM CDT THU MAY 13 2004

...SIGNIFICANT WEATHER ADVISORY...

THIS SIGNIFICANT WEATHER ADVISORY IS FOR LOVE COUNTY.

A STRONG THUNDERSTORM WAS LOCATED OVER THACKERVILLE AT 1128 AM CDT...
MOVING NORTHEAST AT 30 MPH.

STORM INTENSITY IS INCREASING AND SEVERE WEATHER MAY DEVELOP RAPIDLY.

30

Special weather statement, May 13, 11:29 AM CDT, 12 minutes before

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE NORMAN OK
1129 AM CDT THU MAY 13 2004

OKZ012-131645-
GARFIELD OK-
1129 AM CDT THU MAY 13 2004

...SIGNIFICANT WEATHER ADVISORY...

THIS SIGNIFICANT WEATHER ADVISORY IS FOR GARFIELD COUNTY.

A STRONG THUNDERSTORM WAS LOCATED 7 MILES SOUTH OF COVINGTON AT 1129
AM CDT...MOVING EAST AT 10 MPH.

STORM INTENSITY IS INCREASING AND SEVERE WEATHER MAY DEVELOP RAPIDLY.

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

JAMES

Special weather statement, May 13, 11:38 AM CDT, 3 minutes before

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE NORMAN OK
1138 AM CDT THU MAY 13 2004

TXZ085-131700-
WILBARGER TX-
1138 AM CDT THU MAY 13 2004

...SIGNIFICANT WEATHER ADVISORY...

THIS SIGNIFICANT WEATHER ADVISORY IS FOR WILBARGER COUNTY.

A STRONG THUNDERSTORM WAS LOCATED OVER LOCKETT AT 1138 AM CDT...
MOVING NORTHEAST AT 30 MPH.

STORM INTENSITY IS INCREASING AND SEVERE WEATHER MAY DEVELOP RAPIDLY.

30

The office that day

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

Issued	Product	Office	Counties	Lasted
May 12, 7:22 PM CDT	Severe Thunderstorm Warning	OUN	Jackson	38 min
May 12, 7:28 PM CDT	Severe Thunderstorm Warning	OUN	Kiowa, Washita	47 min
May 12, 7:41 PM CDT	Severe Thunderstorm Warning	OUN	Major	49 min
May 12, 8:12 PM CDT	Severe Thunderstorm Warning	OUN	Kiowa, Washita	48 min
May 12, 8:54 PM CDT	Severe Thunderstorm Warning	OUN	Custer	51 min
May 12, 8:58 PM CDT	Severe Thunderstorm Warning	OUN	Caddo, Washita	47 min
May 12, 9:52 PM CDT	Severe Thunderstorm Warning	OUN	Woods	53 min
May 13, 12:37 PM CDT	Severe Thunderstorm Warning	OUN	Carter, Jefferson	23 min
May 13, 12:49 PM CDT	Severe Thunderstorm Warning	OUN	Caddo, Grady	41 min
May 13, 12:59 PM CDT	Severe Thunderstorm Warning	OUN	Jefferson	46 min
May 13, 1:03 PM CDT	Severe Thunderstorm Warning	OUN	Oklahoma	42 min
May 13, 1:16 PM CDT	Severe Thunderstorm Warning	OUN	Cotton, Tillman	44 min
May 13, 1:31 PM CDT	Severe Thunderstorm Warning	OUN	Grady	44 min
May 13, 1:53 PM CDT	Severe Thunderstorm Warning	OUN	Cleveland, Oklahoma	52 min
May 13, 1:57 PM CDT	Severe Thunderstorm Warning	OUN	Cotton	48 min
May 13, 1:58 PM CDT	Severe Thunderstorm Warning	OUN	McClain	47 min
May 13, 1:59 PM CDT	Severe Thunderstorm Warning	OUN	Lincoln	46 min
May 13, 2:19 PM CDT	Severe Thunderstorm Warning	OUN	Jefferson, Stephens	41 min
May 13, 2:23 PM CDT	Severe Thunderstorm Warning	OUN	Pottawatomie	52 min
May 12, 7:02 PM CDT	Severe Thunderstorm Warning	OUN	Hardeman	28 min
May 12, 7:11 PM CDT	Severe Thunderstorm Warning	OUN	Wilbarger	49 min
May 12, 7:29 PM CDT	Severe Thunderstorm Warning	OUN	Hardeman	46 min
May 13, 11:42 AM CDT	Severe Thunderstorm Warning	OUN	Wilbarger	48 min
May 13, 12:28 PM CDT	Severe Thunderstorm Warning	OUN	Knox	47 min
May 13, 12:34 PM CDT	Severe Thunderstorm Warning	OUN	Wilbarger	26 min
May 13, 12:55 PM CDT	Severe Thunderstorm Warning	OUN	Wichita, Wilbarger	50 min
May 13, 12:57 PM CDT	Severe Thunderstorm Warning	OUN	Baylor	48 min
May 13, 1:23 PM CDT	Severe Thunderstorm Warning	OUN	Archer, Baylor	52 min
May 13, 1:42 PM CDT	Severe Thunderstorm Warning	OUN	Wichita	48 min
May 13, 2:11 PM CDT	Severe Thunderstorm Warning	OUN	Archer	49 min
May 13, 2:13 PM CDT	Severe Thunderstorm Warning	OUN	Clay	47 min
May 13, 2:18 PM CDT	Severe Thunderstorm Warning	OUN	Baylor	42 min
May 13, 2:26 PM CDT	Severe Thunderstorm Warning	OUN	Wichita	49 min

Nearby

Severe Thunderstorm Warnings in Texas, 2004 Every severe thunderstorm warning in 2004

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.