Alert archive / Oklahoma / Severe Thunderstorm Warnings in 1997

Severe Thunderstorm Warning 252, NWS Tulsa, OK

July 15, 1997McIntosh County, Oklahoma

NWS Tulsa, OK issued this severe thunderstorm warning at Jul 15, 1997, 4:14 PM CDT for McIntosh County, Oklahoma. It was in force for 46 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
Jul 15, 1997, 4:14 PM CDT (21:14 UTC)
Expired
Jul 15, 1997, 5:00 PM CDT
In force
46 min
Issued by
NWS Tulsa, OK
Area
Whole counties

County McIntosh County, OK

The radar

The Tulsa radar (KINX), 90 km from the middle of the area, began a volume at 21:13 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, 9.2 hours before the alert went out and 158 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 1997-07-15Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 1353 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 1997-07-15The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 17 square meters per square second.1939Sfc1 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
1353 J/kg
Mixed-layer CIN
-123 J/kg
Mixed-layer LCL
1708 m above ground
0-6 km bulk shear
17 kt
0-1 km storm-relative helicity
17 m²/s²
0-3 km storm-relative helicity
30 m²/s²
Significant tornado parameter
0.0
Supercell composite
1.1

Open this sounding in Storm Lab

The text

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

000 
TTAA00 KTUL 152115 RRA
SVRTUL
OKC091-152200-
 
BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE TULSA OK
414 PM CDT TUE JUL 15 1997
 
THE NATIONAL WEATHER SERVICE IN TULSA HAS ISSUED A
SEVERE THUNDERSTORM WARNING EFFECTIVE UNTIL  500 PM CDT
FOR PEOPLE IN THE FOLLOWING LOCATION...
 
IN EAST CENTRAL OKLAHOMA
 
   ...SOUTHWESTERN MCINTOSH COUNTY
 
AT 414 PM...NWS RADAR INDICATED A RAPIDLY DEVELOPING SEVERE THUNDERSTORM
7 MILES NORTH OF HANNA MOVING VERY SLOWLY SOUTH.  HANNA AND VERNON ARE
IN THE PATH OF THIS STORM.
 
HAIL TO THE SIZE OF QUARTERS AND WIND GUSTS TO 70 MPH CAN BE EXPECTED
IN THE WARNED AREA.

The office that day

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

IssuedProductOfficeCountiesLasted
Jul 15, 6:23 AM CDTSevere Thunderstorm WarningTSACherokee37 min
Jul 15, 2:09 PM CDTSevere Thunderstorm WarningTSAHaskell36 min
Jul 15, 3:17 PM CDTSevere Thunderstorm WarningTSAPittsburg43 min
Jul 15, 5:05 PM CDTSevere Thunderstorm WarningTSAOkfuskee25 min
Jul 15, 5:09 PM CDTSevere Thunderstorm WarningTSAMcIntosh36 min
Jul 15, 5:14 PM CDTSevere Thunderstorm WarningTSAOkmulgee31 min
Jul 15, 6:08 PM CDTSevere Thunderstorm WarningTSAOkfuskee37 min
Jul 15, 6:49 PM CDTSevere Thunderstorm WarningTSARogers, Wagoner41 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; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.