Alert archive / Oklahoma / Tornado Warnings in 1996

Tornado Warning 55, NWS Norman, OK

September 25, 1996Grant County, Oklahoma

NWS Norman, OK issued this tornado warning at Sep 25, 1996, 10:55 PM CDT for Grant County, Oklahoma. It was in force for 20 min. 1 report came from inside the area while it was in force.

The area

The counties it named, with what was reported inside it.

The facts

Issued: Sep 25, 1996, 10:55 PM CDT (03:55 UTC)
Expired: Sep 25, 1996, 11:15 PM CDT
In force: 20 min
Issued by: NWS Norman, OK
Area: Whole counties

County Grant County, OK

What was reported inside it

Time	Report	Where	Remark
Sep 25, 11:25 PM CDT	Tornado F0	Deer Creek, OK

NCEI Storm Data entries that began inside the alert's area while it was in force. Before 2003 the local storm report archive is thin, so this is the record of what happened rather than what was phoned in.

The nearest sounding before it

Norman, OK (KOUN), launched 00:00Z, 3.9 hours before the alert went out and 179 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: 971 J/kg
Mixed-layer CIN: -44 J/kg
Mixed-layer LCL: 570 m above ground
0-6 km bulk shear: 45 kt
0-1 km storm-relative helicity: 265 m²/s²
0-3 km storm-relative helicity: 373 m²/s²
Significant tornado parameter: 1.4
Supercell composite: 6.7

Open this sounding in Storm Lab

The text

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

000 
TTAA00 KOKC 260357 COR
TOROKC
OKC053-260415-

BULLETIN - EAS ACTIVATION REQUESTED
TORNADO WARNING...CORRECTED EXPIRATION TIME
NATIONAL WEATHER SERVICE OKLAHOMA CITY OK
1055 PM CDT WED SEP 25 1996

THE NATIONAL WEATHER SERVICE IN OKLAHOMA CITY HAS ISSUED A
TORNADO WARNING EFFECTIVE UNTIL 1115 PM CDT FOR PEOPLE IN THE
FOLLOWING COUNTIES

IN NORTHWESTERN OKLAHOMA
     GRANT

INCLUDING THE FOLLOWING LOCATIONS
     DEER CREEK...MEDFORD...NUMA AND RENFROW

AT 1050 PM...HIGHWAY PATROL REPORTED A TORNADO 3 MILES SOUTHWEST OF DEER
CREEK. THE STORM WAS MOVING TO THE SOUTHEAST AT 15 MPH. AREAS EAST OF
LAMONT ARE IN THE PATH OF THIS STORM.

TAKE COVER NOW. THE SAFEST PLACE IS A BASEMENT UNDER A
WORKBENCH OR PIECE OF STURDY FURNITURE.  OTHERWISE...SEEK
SHELTER IN A SMALL INTERIOR ROOM SUCH AS A CLOSET ON THE LOWEST
FLOOR.  USE BLANKETS...PILLOWS...OR CUSHIONS TO COVER YOUR
BODY.  AVOID WINDOWS.  ABANDON MOBILE HOMES FOR A REINFORCED
BUILDING OR LIE FLAT IN A DITCH OtR CULVERT.

A TORNADO WATCH REMAINS IN EFFECT UNTIL 2 AM.


MMT

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 Sep 25, 9:42 PM CDT, 1 hour 13 minutes earlier.

Area forecast discussion, Sep 25, 9:42 PM CDT, 1 hour 13 minutes before

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE OKLAHOMA CITY OK
940 PM CDT WED SEP 25 1996

WL KEEP DISC BRIEF.  LN STG/SVR TSTMS MOVG SLOWLY ACRS NWRN OK WITH MORE
TSTMS MOVG INTO NRN OK.  LTST SFC ANLYS IS RATHER COMPLEX WITH LOW PRES
OVR OK/TX PNHDLS...WARM FRONT TRAILING THRU ERN OK...AND STG COLD FRNT
TO THE N OVR WRN KS/SE CO.  12Z ETA NAILED PLACEMENT OF SFC FEATURES
THIS EVE...AND PUTS THE COLD FRNT IN NWRN OK BY 12Z THU.  TEMPS OVR WRN
KS/ERN CO QUICKLY DROPPED INTO THE 40S AFTER FRNTL PASSAGE WITH THE AID
OF BRISK NLY WNDS.  TSTMS DVLPG ALG DECENT LOW LVL CNVGC AHEAD OF FRNT
AND SHOULD CONT TO INCRS IN AREAL COVG AS THEY ENCOUNTER BETTER JET
DYNAMICS.  WL MAKE ADJ TO WORDING TO ADD SVR TO ALL BUT THE SRN
ZNS...AND MNTN LOCALLY HVY RAINS.  FLOODING WL BE A PRBLM DUE TO SLOW
MVMNT OF TSTMS/TRAINING ECHOES.  WL ALSO TAKE LAST MINUTE LOOK AT TEMPS
AND WINDS.  GOTTA LUV THOSE 40S...COME ON DOWN.

FCSTID = 25/MCCLURE

.OKC4...
OK...NONE.
TX...NONE.

In the hours before

Local storm report, Sep 25, 7:18 PM CDT, 3 hours 37 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE OKLAHOMA CITY OK
720 PM CDT WED SEP 25 1996

TIME(CDT)  .....CITY LOCATION..... STATE  ...EVENT/REMARKS...
           ....COUNTY LOCATION....

06360 PM    9 NW BUFFALO               OK  0.88 INCH HAIL
09/25/96   HARPER

BZ

Local storm report, Sep 25, 8:19 PM CDT, 2 hours 36 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE OKLAHOMA CITY OK
820 PM CDT WED SEP 25 1996

TIME(CDT)  .....CITY LOCATION..... STATE  ...EVENT/REMARKS...
           ....COUNTY LOCATION....

0740 PM    11 SE BUFFALO              OK  0.75 INCH HAIL
09/25/96   HARPER

0740 PM    2 S SELMAN                 OK  0.88 INCH HAIL
09/25/96   HARPER

0756 PM    1 E MAY                    OK  0.75 INCH HAIL
09/25/96   HARPER

BZ

Local storm report, Sep 25, 9:54 PM CDT, 1 hour 1 minute before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE OKLAHOMA CITY OK
955 PM CDT WED SEP 25 1996

TIME(CDT)  .....CITY LOCATION..... STATE  ...EVENT/REMARKS...
           ....COUNTY LOCATION....

094p0 PM    MANCHESTER                OK   UNCONFIRMED REPORT OF TORNADO
09/25/96   GRANT                          JUST EAST OF TOWN.

J

The office that day

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

Issued	Product	Office	Counties	Lasted
Sep 25, 7:00 PM CDT	Severe Thunderstorm Warning	OUN	Harper	45 min
Sep 25, 7:49 PM CDT	Severe Thunderstorm Warning	OUN	Ellis, Harper, Woodward	41 min
Sep 25, 9:00 PM CDT	Severe Thunderstorm Warning	OUN	Grant	60 min
Sep 25, 9:32 PM CDT	Flash Flood Warning	OUN	Ellis, Harper, Woodward	3 hr
Sep 25, 9:47 PM CDT	Tornado Warning	OUN	Grant	28 min
Sep 25, 10:15 PM CDT	Tornado Warning	OUN	Grant	30 min
Sep 25, 10:29 PM CDT	Severe Thunderstorm Warning	OUN	Kay	46 min
Sep 25, 10:36 PM CDT	Severe Thunderstorm Warning	OUN	Major, Woods, Woodward	39 min
Sep 25, 11:11 PM CDT	Severe Thunderstorm Warning	OUN	Major, Woods	49 min
Sep 25, 11:15 PM CDT	Tornado Warning	OUN	Grant, Kay	30 min
Sep 25, 11:22 PM CDT	Severe Thunderstorm Warning	OUN	Kay	53 min
Sep 25, 11:45 PM CDT	Tornado Warning	OUN	Kay	45 min
Sep 25, 11:47 PM CDT	Severe Thunderstorm Warning	OUN	Garfield, Kingfisher	43 min
Sep 25, 11:57 PM CDT	Flash Flood Warning	OUN	Kay	4 hr
Sep 26, 12:14 AM CDT	Severe Thunderstorm Warning	OUN	Alfalfa, Woods	46 min
Sep 26, 1:06 AM CDT	Severe Thunderstorm Warning	OUN	Noble, Payne	54 min
Sep 26, 1:56 AM CDT	Severe Thunderstorm Warning	OUN	Payne	34 min
Sep 26, 2:24 AM CDT	Severe Thunderstorm Warning	OUN	Garfield	36 min
Sep 26, 11:48 AM CDT	Severe Thunderstorm Warning	OUN	Choctaw, Pushmataha	57 min
Sep 26, 11:48 AM CDT	Severe Thunderstorm Warning	OUN	Bryan	57 min
Sep 26, 12:40 PM CDT	Severe Thunderstorm Warning	OUN	Choctaw, Pushmataha	50 min

Nearby

Tornado Warnings in Oklahoma, 1996 Every tornado warning in 1996 Tornadoes in 1996

Sources

The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; verification from NCEI's Storm Data; the sounding from the Mesonet's radiosonde archive.