Alert archive / Oklahoma / Tornado Warnings in 1995

Tornado Warning 13, NWS Norman, OK

April 17, 1995Garvin County, Stephens County, Oklahoma

NWS Norman, OK issued this tornado warning at Apr 17, 1995, 6:47 PM CDT for Garvin County, Stephens County, Oklahoma. It was in force for 43 min.

The area

The outline the Iowa Environmental Mesonet reconstructed for it; the warning itself named whole counties.

The facts

Issued
Apr 17, 1995, 6:47 PM CDT (23:47 UTC)
Expired
Apr 17, 1995, 7:30 PM CDT
In force
43 min
Issued by
NWS Norman, OK
Area
Whole counties; the outline is the Mesonet’s reconstruction

Counties Garvin County, OK, Stephens County, OK

The radar

The Norman radar (KTLX), 85 km from the middle of the area, began a volume at 23:46 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

Norman, OK (KOUN), launched 12:00Z, 11.8 hours before the alert went out and 70 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, Norman, OK at 12:00Z on 1995-04-17Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 94 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, Norman, OK at 12:00Z on 1995-04-17The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 177 square meters per square second.19395878Sfc1 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
94 J/kg
Mixed-layer CIN
-194 J/kg
Mixed-layer LCL
552 m above ground
0-6 km bulk shear
63 kt
0-1 km storm-relative helicity
177 m²/s²
0-3 km storm-relative helicity
139 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.7

Open this sounding in Storm Lab

The text

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

000 
TTAA00 KOKC 172346
TOROKC
OKC049-137-180030-

BULLETIN - EBS ACTIVATION REQUESTED
TORNADO WARNING
NATIONAL WEATHER SERVICE OKLAHOMA CITY OK
647 PM CDT MON APR 17 1995

THE NATIONAL WEATHER SERVICE IN OKLAHOMA CITY HAS ISSUED A
TORNADO WARNING EFFECTIVE UNTIL 730 PM CDT FOR PEOPLE IN THE
FOLLOWING COUNTIES

IN SOUTHEASTERN OKLAHOMA
     SOUTHWESTERN GARVIN

IN SOUTHWESTERN OKLAHOMA
     EASTERN STEPHENS

INCLUDING THE FOLLOWING LOCATIONS
     ANTIOCH...ELMORE CITY...FOSTER AND PERNELL

AT 645 PM CDT DOPPLER RADAR INDICATED A DEVELOPING TORNADO NEAR VELMA.
PERNELL AND ELMORE CITY ARE IN THE PATH OF THIS STORM.

THE TORNADO WAS MOVING TO THE EAST-NORTHEAST AT 40 MPH.

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 REIN$FORCED
BUILDING OR LIE FLAT IN A DITCH OR CULVERT.

LAT...LON 3458  9732 3441  9787 3464  9776 3477  9732
MT

The office that day

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

IssuedProductOfficeCountiesLasted
Apr 16, 7:06 PM CDTSevere Thunderstorm WarningOUNCarter, Garvin, Jefferson, Stephens54 min
Apr 16, 7:06 PM CDTSevere Thunderstorm WarningOUNCotton54 min
Apr 16, 7:06 PM CDTSevere Thunderstorm WarningOUNGrady54 min
Apr 16, 8:00 PM CDTSevere Thunderstorm WarningOUNJefferson60 min
Apr 16, 8:00 PM CDTSevere Thunderstorm WarningOUNStephens60 min
Apr 16, 8:13 PM CDTSevere Thunderstorm WarningOUNPayne47 min
Apr 16, 8:27 PM CDTSevere Thunderstorm WarningOUNCarter, Murray63 min
Apr 16, 9:23 PM CDTSevere Thunderstorm WarningOUNCarter, Johnston, Murray52 min
Apr 16, 9:58 PM CDTSevere Thunderstorm WarningOUNBryan, Johnston, Marshall62 min
Apr 16, 10:40 PM CDTSevere Thunderstorm WarningOUNAtoka, Bryan50 min
Apr 17, 5:12 AM CDTSevere Thunderstorm WarningOUNTillman48 min
Apr 17, 4:29 PM CDTSevere Thunderstorm WarningOUNTillman46 min
Apr 17, 4:37 PM CDTTornado WarningOUNTillman38 min
Apr 17, 5:05 PM CDTSevere Thunderstorm WarningOUNComanche40 min
Apr 17, 5:05 PM CDTTornado WarningOUNTillman40 min
Apr 17, 5:19 PM CDTTornado WarningOUNCotton26 min
Apr 17, 5:39 PM CDTTornado WarningOUNCotton36 min
Apr 17, 6:05 PM CDTTornado WarningOUNCotton, Stephens40 min

Nearby

Tornado Warnings in Oklahoma, 1995Every tornado warning in 1995Tornadoes in 1995

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.