Alert archive / Oklahoma / Tornado Warnings in 2004

Tornado Warning 23, NWS Norman, OK

April 23, 2004Cotton County, Tillman County, Oklahoma

NWS Norman, OK issued this tornado warning at Apr 23, 2004, 2:56 PM CDT for Cotton County, Tillman County, Oklahoma. 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 outline as issued.

The facts

Issued: Apr 23, 2004, 2:56 PM CDT (19:56 UTC)
Expired: Apr 23, 2004, 3:45 PM CDT
In force: 49 min
Issued by: NWS Norman, OK
Area: Counties, with a storm outline in the text

Counties Cotton County, OK, Tillman County, OK

The radar

The Altus AFB radar (KFDR), 29 km from the middle of the area, began a volume at 19:58 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.

Did it verify

Not verified. The Iowa Environmental Mesonet's Cow found no qualifying storm report inside this tornado warning while it was in force. That is not proof nothing happened: reports are thin where few people live.

Cow counts a report within 15 km of the polygon while the warning was in force: a tornado for a tornado warning; hail of 1 inch or more, a gust of 58 mph or more or wind damage for a severe thunderstorm warning; a flash flood report for a flash flood warning.

The watch it was issued in

The SPC watch in force over the same counties when this warning went out.

Issued	Product	Office	Lasted
Apr 23, 12:15 PM CDT	Tornado Watch	SPC	6 hr

The nearest sounding before it

Fort Sill, OK (KFSI), launched 12:00Z, 7.9 hours before the alert went out and 47 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: 1004 J/kg
Mixed-layer CIN: -134 J/kg
Mixed-layer LCL: 552 m above ground
0-6 km bulk shear: 42 kt
0-1 km storm-relative helicity: 177 m²/s²
0-3 km storm-relative helicity: 239 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 4.2

Open this sounding in Storm Lab

The text

As transmitted, in the capitals the NWS used until 2016.

000 
WFUS54 KOUN 231956
TOROKC
OKC033-141-232045-

BULLETIN - EAS ACTIVATION REQUESTED
TORNADO WARNING
NATIONAL WEATHER SERVICE NORMAN OK
256 PM CDT FRI APR 23 2004

THE NATIONAL WEATHER SERVICE IN NORMAN HAS ISSUED A

* TORNADO WARNING FOR...
  COTTON COUNTY IN SOUTHWEST OKLAHOMA
  TILLMAN COUNTY IN SOUTHWEST OKLAHOMA

* UNTIL 345 PM CDT

* AT 256 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  SEVERE THUNDERSTORM CAPABLE OF PRODUCING A TORNADO 3 MILES WEST OF
  GRANDFIELD...MOVING EAST AT 25 MPH.

* LOCATIONS IN THE WARNING INCLUDE COOKIETOWN...DEVOL...GRANDFIELD...
  LOVELAND AND RANDLETT

TAKE COVER NOW. LEAVE MOBILE HOMES AND VEHICLES. IF POSSIBLE...MOVE
TO A BASEMENT OR STORM SHELTER. OTHERWISE MOVE TO AN INTERIOR ROOM OR
HALLWAY ON THE LOWEST FLOOR. STAY AWAY FROM WINDOWS AND OUTSIDE
WALLS.

LAT...LON 3438 9883 3414 9883 3414 9845 3442 9845

$$

SIX

What forecasters said that day

The local office's own words before this tornado 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 tornado warning went out at Apr 23, 11:44 AM CDT, 3 hours 12 minutes earlier.

Area forecast discussion, Apr 23, 11:44 AM CDT, 3 hours 12 minutes before

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE NORMAN OK
1144 AM CDT FRI APR 23 2004

A QUICK UPDATE HERE TO ADVISE MEDIA OF A FLOOD WATCH TO BE ISSUED
SHORTLY. WATCH WILL COVER GENERALLY THE CENTRAL THIRD OF OKLAHOMA
INTO SOUTHWEST OKLAHOMA AND PARTS OF WESTERN NORTH TEXAS. SEE
COUNTIES INCLUDED AT THE BOTTOM OF THIS PRODUCT. MAIN THREAT WILL BE
LATE THIS AFTERNOON AND EVENING GENERALLY SOUTH OF I-40 SPREADING
NORTH OF I40 TONIGHT.

32

1130 AM CDT FRI APR 23 2004

.DISCUSSION...
WARM FRONT CONTINUES TO LIFT NORTH AND EXTENDS FROM NEAR CROWELL TO
KFDR TO SEMINOLE LATE THIS MORNING.  THUNDERSTORMS HAVE SKIRTED THE
NORTHERN EDGE OF OKLAHOMA BUT MOSTLY REMAIN IN KANSAS SO FAR. HAVE
ALSO HAD SCATTERED LIGHT SHOWERS OVER THE ENTIRE AREA THIS
MORNING... BUT THERE ARE SIGNS OF SLOWLY INCREASING INTENSITY NEAR
DUNCAN PER LATEST RADAR TRENDS. EXPECT CONVECTION TO CONTINUE TO
INCREASE DURING THE AFTERNOON.

WILL UPDATE ZONES TO ACCOUNT FOR THE NORTH-MOVING WARM FRONT...
INCREASING TEMPERATURES AND IN THE MID-SOUTH ZONE AND KEEPING
SOUTHEAST WINDS OVER A LARGER AREA OF THE SOUTH. HEAVY RAINFALL
STILL LOOKS LIKE A GOOD BET IN SOME AREAS THIS AFTERNOON.  .26.

--------------
347 AM CDT FRI APR 23 2004

.DISCUSSION...
POTENT WX SYSTEM OVER THE SRN ROCKIES THIS MORNING WILL BE IMPACTING
THE FA THE NEXT 24 TO 48 HOURS. QSTNRY SFC FRONT EXTENDS FROM SERN
OK INTO WRN N TX THIS MORNING AND THIS FEATURE IS NOT EXPECTED TO
MOVE MUCH DURING THE DAY. MOIST AIR WILL CONTINUE TO FLOW NWD INTO
THE FRONTAL ZONE TODAY. WITH SOME BREAKS IN THE CLOUDS IN SRN OK/N
TX AMS EXPECTED TO BECOME INCREASINGLY UNSTABLE BY AFTN. WIND FIELDS
WILL BE INCREASING AS MID LVL SYS OVER THE ROCKIES ADVANCES EWD.
EXPECT SVR STORMS TO DEVELOP BY MID AFTN IN THE VCNTY OF THE SFC
BNDRY AS PER SWODY1. WIDESPREAD SHOWERS AND TSTMS EXPECTED TO
DEVELOP NORTH OF THE FRONT LATER TODAY AND THROUGH TONIGHT WITH STG
ISENT LIFT DVLPG. COULD STILL SEE SOME SEVERE HAIL PRODUCERS WELL
NORTH OF THE SFC BOUNDARY.  HEAVY RAIN IS ALSO A THREAT...ESP
TONIGHT AS LIFT INCREASES ALONG AND JUST NORTH OF THE FRONT. WILL
NOT GO WITH FLOOD WATCH ATTM DUE TO UNCERTAINTY OVER WHERE HEAVY
RAIN WILL BE FOCUSED BUT LATER SHIFTS MAY NEED TO ISSUE FLOOD WATCH
AS AREA OF CONCERN BECOMES BETTER DEFINED. HVY RAIN/SEVERE WX THREAT
SHIFTS INTO ERN PARTS OF THE FA SATURDAY AS UPR SYS BEGINS TO OPEN
UP AND LIFT NEWD AND SFC FNT PUSHES SLOWLY EWD. SYSTEM FINALLY
CLEARS THE AREA SUNDAY WITH PLEASANT WX EXPECTED THROUGH AT LEAST
MID WEEK.

&&

.PRELIMINARY POINT TEMPS/POPS...
OKLAHOMA CITY OK  67  55  65  49 /  80  90  80  30
HOBART OK         64  52  64  48 /  80  90  60  10
WICHITA FALLS TX  76  58  66  50 /  70  90  70  30
GAGE OK           54  46  58  44 /  80  70  30  10
PONCA CITY OK     63  53  63  47 /  80  90  80  30
DURANT OK         81  65  71  53 /  60  70  80  60

&&

.OUN WATCHES/WARNINGS/ADVISORIES...
OK...FLOOD WATCH LATE THIS AFTN AND TNGT
ZNS 07-08-12-13-18>20-23>32-35-37>42-44>46-50
TX...FLOOD WATCH LATE THIS AFTN AND TNGT
ZNS 85-86-88>90

&&

2

Hazardous weather outlook, Apr 23, 12:09 PM CDT, 2 hours 47 minutes before

HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE NORMAN OK
1205 PM CDT FRI APR 23 2004

OKZ004>048-050>052-TXZ083>090-241200-

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 MODERATE RISK OF SEVERE THUNDERSTORMS OVER MUCH OF
WESTERN NORTH TEXAS AND SOUTHERN OKLAHOMA. THERE IS A SLIGHT RISK
TO THE NORTH OF THE MODERATE RISK ACROSS THE REMAINDER OF WESTERN
NORTH TEXAS AND MUCH OF OKLAHOMA.

LOCATION...
THE MODERATE RISK AREA IS ALONG AND SOUTH OF A LINE FROM TRUSCOTT TO
VERNON TEXAS... TO PAULS VALLEY OKLAHOMA TO DURANT OKLAHOMA. THE
SLIGHT RISK AREA IS NORTH OF THE MODERATE RISK AND COVERS THE
REMAINDER OF THE AREA.

TIMING...
SEVERE THUNDERSTORMS ARE MOST LIKELY FROM 3 PM THROUGH THE EVENING
HOURS.

IMPACTS...
HAIL TO THE SIZE OF BASEBALLS AND WINDS TO 70 MPH ARE EXPECTED IN
THE MODERATE RISK AREA... ALONG WITH THE POTENTIAL FOR TORNADOES. IN
THE SLIGHT RISK AREA...HAIL TO THE QUARTERS AND WINDS TO 70 MPH
ARE EXPECTED.

RECOMMENDED ACTIONS...
EMERGENCY MANAGEMENT AND STORM SPOTTER GROUPS SHOULD BE PREPARED FOR
SEVERE WEATHER OPERATIONS FROM MID AFTERNOON THROUGH THE EVENING
HOURS.

DISCUSSION...
A WARM FRONT CONTINUES TO MOVE SLOWLY NORTH ACROSS WESTERN NORTH
TEXAS AND SOUTHERN OKLAHOMA AND EARLY THIS AFTERNOON EXTENDS FROM
NEAR CROWELL TEXAS TO FREDERICK AND SEMINOLE OKLAHOMA. THE AIRMASS
TO THE SOUTH OF THIS BOUNDARY IS QUITE UNSTABLE. SOME OF THIS
UNSTABLE AIR IS MOVING ABOVE THE WARM FRONT AND SHOWERS AND
THUNDERSTORMS DEVELOPED IN NORTHERN OKLAHOMA THIS MORNING.

SHOWERS AND THUNDERSTORMS ARE EXPECTED TO INCREASE IN COVERAGE THIS
AFTERNOON. ACROSS NORTHERN OKLAHOMA... THESE THUNDERSTORMS WILL
REMAIN ELEVATED OVER THE SHALLOW COOL AIR NORTH OF THE FRONT... BUT
WILL STILL BE CAPABLE OF PRODUCING DAMAGING WINDS AND HAIL TO THE
SIZE OF QUARTERS. FARTHER SOUTH... THE INSTABILITY AND WIND SHEAR
WILL SUPPORT SUPERCELL THUNDERSTORMS NEAR AND SOUTH OF THE WARM
FRONT. THUNDERSTORMS IN THIS AREA WILL BE CAPABLE OF PRODUCING
LARGER HAIL IN ADDITION TO DAMAGING WINDS AND ISOLATED TORNADOES
WILL BE POSSIBLE.

ALTHOUGH THE THREAT OF SEVERE WEATHER WILL DECREASE BY LATE
EVENING... AS THE UPPER LEVEL LOW CONTINUES TO AFFECT THE AREA
OVERNIGHT... SEVERE THUNDERSTORMS WILL STILL BE POSSIBLE. LARGE HAIL
WILL BECOME THE PRIMARY SEVERE WEATHER THREAT OVERNIGHT.

PROBABILITY TABLE...
VALID THROUGH 700 AM CDT SATURDAY APR 24.
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...
TORRENTIAL RAIN MAY ACCOMPANY THUNDERSTORMS THIS AFTERNOON AND
TONIGHT...DUE TO SLOW MOVEMENT...AND OR REPEATED ROUNDS OF HEAVY
RAIN FROM ADDITIONAL THUNDERSTORMS OVERNIGHT.  A FLASH FLOOD WATCH
IS IN EFFECT.

.DAYS TWO THROUGH SEVEN...SATURDAY THROUGH THURSDAY...

THUNDERSTORM OUTLOOK...
THUNDERSTORMS WILL POSSIBLY BE ONGOING SATURDAY MORNING ACROSS MUCH
OF OKLAHOMA AND WESTERN NORTH TEXAS AS THE SLOW MOVING UPPER LEVEL
LOW MAKES ITS WAY EAST ACROSS THE SOUTHERN PLAINS. THE POTENTIAL
WILL EXIST BY SATURDAY AFTERNOON ACROSS SOUTH CENTRAL AND SOUTHEAST
OKLAHOMA FOR SOME OF THESE STORMS TO BE ACCOMPANIED BY LARGE HAIL.
THUNDERSTORMS RETURN TO THE FORECAST NEXT THURSDAY.

OTHER HAZARDOUS WEATHER...
NONE.

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

26

In the hours before

Local storm report, Apr 23, 2:21 PM CDT, 35 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE NORMAN OK
221 PM CDT FRI APR 23 2004

..TIME...   ...EVENT...     ...CITY LOCATION...      ...LAT.LON...
..DATE...   ....MAG....     ..COUNTY LOCATION...ST.. ...SOURCE....
            ..REMARKS..

0205 PM     HAIL             5 S TALOGA              35.97N 98.96W
04/23/2004  0.88 INCH        DEWEY              OK   LAW ENFORCEMENT

            COUNTY SHERIFFS OFFICE REPORTED HAIL COVERED US HIGHWAY
            183.

&&

KT

Local storm report, Apr 23, 2:25 PM CDT, 31 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE NORMAN OK
225 PM CDT FRI APR 23 2004

..TIME...   ...EVENT...     ...CITY LOCATION...      ...LAT.LON...
..DATE...   ....MAG....     ..COUNTY LOCATION...ST.. ...SOURCE....
            ..REMARKS..

0224 PM     HAIL             4 SE SEILING            36.11N 98.87W
04/23/2004  0.88 INCH        DEWEY              OK   AMATEUR RADIO

            HAIL 6 INCHES DEEP ON US HIGHWAY 270.

&&

KT

Special weather statement, Apr 23, 2:32 PM CDT, 24 minutes before

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE NORMAN OK
232 PM CDT FRI APR 23 2004

OKZ015-231945-
DEWEY OK-
232 PM CDT FRI APR 23 2004

...SIGNIFICANT WEATHER ADVISORY...

THIS SIGNIFICANT WEATHER ADVISORY IS FOR DEWEY COUNTY.

STRONG THUNDERSTORMS WERE DEVELOPING BETWEEN CAMARGO AND OAKWOOD AT
232 PM CDT...MOVING NORTHEAST AT 50 MPH.

SMALL HAIL AND WINDS AROUND 50 MPH ARE POSSIBLE.

THE STORM THAT PROMPTED THE EARLIER WARNING HAS MOVED INTO MAJOR
COUNTY.

CMS

Local storm report, Apr 23, 2:34 PM CDT, 22 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE NORMAN OK
234 PM CDT FRI APR 23 2004

..TIME...   ...EVENT...     ...CITY LOCATION...      ...LAT.LON...
..DATE...   ....MAG....     ..COUNTY LOCATION...ST.. ...SOURCE....
            ..REMARKS..

0230 PM     HAIL             5 E DAVIDSON            34.24N 98.99W
04/23/2004  0.88 INCH        TILLMAN            OK   AMATEUR RADIO

&&

KT

Local storm report, Apr 23, 2:37 PM CDT, 19 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE NORMAN OK
237 PM CDT FRI APR 23 2004

..TIME...   ...EVENT...     ...CITY LOCATION...      ...LAT.LON...
..DATE...   ....MAG....     ..COUNTY LOCATION...ST.. ...SOURCE....
            ..REMARKS..

0224 PM     HAIL             3 S ORION               36.17N 98.78W
04/23/2004  1.00 INCH        MAJOR              OK   PUBLIC

0234 PM     HAIL             3 S ORION               36.17N 98.78W
04/23/2004  1.00 INCH        MAJOR              OK   PUBLIC

0236 PM     HAIL             2 S HOLLISTER           34.31N 98.87W
04/23/2004  1.00 INCH        TILLMAN            OK   PUBLIC

&&

KT

Special weather statement, Apr 23, 2:47 PM CDT, 9 minutes before

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE NORMAN OK
247 PM CDT FRI APR 23 2004

OKZ038-044-232000-
COMANCHE OK-COTTON OK-
247 PM CDT FRI APR 23 2004

...SIGNIFICANT WEATHER ADVISORY...

THIS SIGNIFICANT WEATHER ADVISORY IS FOR COMANCHE AND COTTON
COUNTIES.

A SEVERE THUNDERSTORM WAS LOCATED 12 MILES WEST OF DEVOL AT 247 PM
CDT...MOVING EAST AT 15 MPH.  THIS STORM WILL TRACK INTO WESTERN
PARTS OF COTTON COUNTY AND NORTHERN COMMANCHE COUNTY DURING THE NEXT
HALF HOUR.

PEOPLE IN COMANCHE AND COTTON COUNTIES...INCLUDING THE CITY OF
LAWTON...SHOULD MONITOR THE WEATHER SITUATION CLOSELY. LISTEN FOR
WARNINGS AND REMAIN ALERT FOR THREATENING WEATHER CONDITIONS.

SIX

The office that day

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

Issued	Product	Office	Counties	Lasted
Apr 22, 7:00 PM CDT	Severe Thunderstorm Warning	OUN	Hughes	45 min
Apr 22, 10:28 PM CDT	Severe Thunderstorm Warning	OUN	Seminole	47 min
Apr 22, 11:40 PM CDT	Severe Thunderstorm Warning	OUN	Canadian	35 min
Apr 23, 12:24 AM CDT	Severe Thunderstorm Warning	OUN	Logan, Oklahoma	51 min
Apr 23, 1:56 PM CDT	Severe Thunderstorm Warning	OUN	Custer	34 min
Apr 23, 1:57 PM CDT	Severe Thunderstorm Warning	OUN	Tillman	48 min
Apr 23, 2:04 PM CDT	Severe Thunderstorm Warning	OUN	Dewey, Major	26 min
Apr 23, 2:27 PM CDT	Severe Thunderstorm Warning	OUN	Major	48 min
Apr 23, 2:43 PM CDT	Severe Thunderstorm Warning	OUN	Tillman	47 min
Apr 23, 3:15 PM CDT	Severe Thunderstorm Warning	OUN	Alfalfa, Major	45 min
Apr 23, 3:19 PM CDT	Severe Thunderstorm Warning	OUN	Comanche	41 min
Apr 23, 3:44 PM CDT	Tornado Warning	OUN	Cotton	46 min
Apr 23, 3:50 PM CDT	Severe Thunderstorm Warning	OUN	Major	40 min
Apr 23, 3:54 PM CDT	Severe Thunderstorm Warning	OUN	Grant	51 min
Apr 23, 3:58 PM CDT	Severe Thunderstorm Warning	OUN	Comanche, Stephens	47 min
Apr 23, 4:25 PM CDT	Severe Thunderstorm Warning	OUN	Alfalfa, Garfield	35 min
Apr 23, 4:29 PM CDT	Severe Thunderstorm Warning	OUN	Blaine	46 min
Apr 23, 4:44 PM CDT	Severe Thunderstorm Warning	OUN	Grant	31 min
Apr 23, 4:44 PM CDT	Severe Thunderstorm Warning	OUN	Stephens	46 min
Apr 23, 4:52 PM CDT	Flash Flood Warning	OUN	Stephens	3 hr
Apr 23, 5:11 PM CDT	Severe Thunderstorm Warning	OUN	Blaine, Major	49 min
Apr 23, 5:15 PM CDT	Severe Thunderstorm Warning	OUN	Grant	30 min
Apr 23, 5:23 PM CDT	Severe Thunderstorm Warning	OUN	Caddo, Canadian	37 min
Apr 23, 5:27 PM CDT	Severe Thunderstorm Warning	OUN	Jefferson, Stephens	48 min
Apr 23, 5:30 PM CDT	Severe Thunderstorm Warning	OUN	Washita	45 min
Apr 23, 5:42 PM CDT	Severe Thunderstorm Warning	OUN	Grant, Kay	33 min
Apr 23, 6:08 PM CDT	Severe Thunderstorm Warning	OUN	Garvin	52 min
Apr 23, 6:13 PM CDT	Severe Thunderstorm Warning	OUN	Kay	17 min
Apr 23, 6:14 PM CDT	Severe Thunderstorm Warning	OUN	Stephens	46 min
Apr 23, 6:28 PM CDT	Severe Thunderstorm Warning	OUN	Blaine	47 min
Apr 23, 6:33 PM CDT	Severe Thunderstorm Warning	OUN	Kay	27 min
Apr 23, 6:37 PM CDT	Severe Thunderstorm Warning	OUN	Marshall	23 min
Apr 23, 6:50 PM CDT	Severe Thunderstorm Warning	OUN	Johnston	40 min

Nearby

Tornado Warnings in Oklahoma, 2004 Every tornado warning in 2004 Tornadoes 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.