Alert archive / Oklahoma / Severe Thunderstorm Warnings in 1997

Severe Thunderstorm Warning 310, NWS Norman, OK

June 16, 1997Garvin County, Stephens County, Oklahoma

NWS Norman, OK issued this severe thunderstorm warning at Jun 16, 1997, 10:10 PM CDT for Garvin County, Stephens County, Oklahoma. It was in force for 50 min. 2 reports came from inside the area while it was in force.

The area

The outline the Iowa Environmental Mesonet reconstructed for it; the warning itself named whole counties, with what was reported inside it.

The facts

Issued
Jun 16, 1997, 10:10 PM CDT (03:10 UTC)
Expired
Jun 16, 1997, 11:00 PM CDT
In force
50 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), 89 km from the middle of the area, began a volume at 03:09 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.

What was reported inside it

TimeReportWhereRemark
Jun 16, 10:14 PM CDTHail 1.75Tussy, OK
Jun 16, 10:15 PM CDTThunderstorm WindDuncan, OKA carport was destroyed and windows were broken out of a residence in southeast Duncan.

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 watch it was issued in

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

IssuedProductOfficeLasted
Jun 16, 10:00 PM CDTTornado WatchSPC6 hr

The nearest sounding before it

Norman, OK (KOUN), launched 00:00Z, 3.2 hours before the alert went out and 74 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 00:00Z on 1997-06-17Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 3446 joules per kilogram.LCLEL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Norman, OK at 00:00Z on 1997-06-17The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 23 square meters per square second.1939587897Sfc1 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
3446 J/kg
Mixed-layer CIN
-2 J/kg
Mixed-layer LCL
1173 m above ground
0-6 km bulk shear
44 kt
0-1 km storm-relative helicity
23 m²/s²
0-3 km storm-relative helicity
116 m²/s²
Significant tornado parameter
1.4
Supercell composite
6.6

Open this sounding in Storm Lab

The text

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

000 
TTAA00 KOKC 170311
SVROKC
OKC049-137-170400-

BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE NORMAN OK
1010 PM CDT MON JUN 16 1997

THE NATIONAL WEATHER SERVICE IN NORMAN HAS ISSUED A SEVERE
THUNDERSTORM WARNING EFFECTIVE UNTIL 1100 PM CDT FOR PEOPLE IN
THE FOLLOWING COUNTIES

IN SOUTHEASTERN OKLAHOMA
     WESTERN AND CENTRAL GARVIN

IN SOUTHWESTERN OKLAHOMA
     STEPHENS

     BRAY...COMANCHE...DUNCAN...ELMORE CITY...MARLOW...MAYSVILLE
     AND VELMA

AT 1010 PM CDT DOPPLER RADAR INDICATED A LINE OF SEVERE THUNDERSTORMS
FROM COMANCHE TO LAKE FUQUA.

THE STORMS WERE MOVING NORTHEAST AT 25 MPH.

THESE STORMS LIKELY CONTAINS HAIL UP TO THE SIZE OF GOLFBALLS AND
TWIND GUSTS TO 70 MPH. VERY HEAVY RAIN AND FREQUENT LIGHTNING
ALSO ACCOMPANY THESE STORMS.  SEEK SHELTER INDOORS...AWAY FROM
WINDOWS...AND AVOID USING ELECTRICAL APPLIANCES.


LAT...LON 3456  9718 3430  9813 3463  9810 3484  9740
WR

The office that day

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

IssuedProductOfficeCountiesLasted
Jun 16, 7:00 PM CDTSevere Thunderstorm WarningOUNPushmataha30 min
Jun 16, 7:01 PM CDTFlash Flood WarningOUNKay3 hr
Jun 16, 7:14 PM CDTSevere Thunderstorm WarningOUNLove, Marshall46 min
Jun 16, 7:30 PM CDTSevere Thunderstorm WarningOUNPushmataha30 min
Jun 16, 7:33 PM CDTSevere Thunderstorm WarningOUNCuster, Washita42 min
Jun 16, 7:50 PM CDTSevere Thunderstorm WarningOUNHarmon, Jackson55 min
Jun 16, 8:09 PM CDTSevere Thunderstorm WarningOUNCuster51 min
Jun 16, 8:14 PM CDTSevere Thunderstorm WarningOUNJohnston46 min
Jun 16, 8:17 PM CDTSevere Thunderstorm WarningOUNTillman43 min
Jun 16, 8:32 PM CDTSevere Thunderstorm WarningOUNCoal, Hughes43 min
Jun 16, 8:38 PM CDTSevere Thunderstorm WarningOUNStephens52 min
Jun 16, 8:42 PM CDTSevere Thunderstorm WarningOUNBlaine48 min
Jun 16, 8:46 PM CDTSevere Thunderstorm WarningOUNGarvin44 min
Jun 16, 8:50 PM CDTSevere Thunderstorm WarningOUNPottawatomie40 min
Jun 16, 8:52 PM CDTSevere Thunderstorm WarningOUNCleveland, McClain53 min
Jun 16, 9:01 PM CDTSevere Thunderstorm WarningOUNCotton, Tillman44 min
Jun 16, 9:01 PM CDTSevere Thunderstorm WarningOUNJackson, Kiowa44 min
Jun 16, 9:05 PM CDTSevere Thunderstorm WarningOUNComanche, Grady40 min
Jun 16, 9:09 PM CDTSevere Thunderstorm WarningOUNCoal, Pontotoc51 min
Jun 16, 9:14 PM CDTSevere Thunderstorm WarningOUNHughes46 min
Jun 16, 9:20 PM CDTFlash Flood WarningOUNHughes3 hr
Jun 16, 9:26 PM CDTSevere Thunderstorm WarningOUNStephens49 min
Jun 16, 9:27 PM CDTSevere Thunderstorm WarningOUNPottawatomie, Seminole48 min
Jun 16, 9:31 PM CDTSevere Thunderstorm WarningOUNGarvin, McClain44 min
Jun 16, 9:43 PM CDTSevere Thunderstorm WarningOUNGrady47 min
Jun 16, 9:51 PM CDTSevere Thunderstorm WarningOUNHughes39 min
Jun 16, 9:54 PM CDTSevere Thunderstorm WarningOUNCotton, Jefferson51 min
Jun 16, 9:57 PM CDTSevere Thunderstorm WarningOUNCarter48 min
Jun 16, 10:11 PM CDTSevere Thunderstorm WarningOUNSeminole49 min
Jun 16, 10:29 PM CDTFlash Flood WarningOUNStephens106 min

Nearby

Severe Thunderstorm Warnings in Oklahoma, 1997Every severe thunderstorm warning in 1997

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; radar from the NEXRAD Level II archive.