Alert archive / Oklahoma / Severe Thunderstorm Warnings in 1997

Severe Thunderstorm Warning 101, NWS Tulsa, OK

May 2, 1997Washington County, Oklahoma

NWS Tulsa, OK issued this severe thunderstorm warning at May 2, 1997, 12:55 AM CDT for Washington County, Oklahoma. It was in force for 65 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
May 2, 1997, 12:55 AM CDT (05:55 UTC)
Expired
May 2, 1997, 2:00 AM CDT
In force
65 min
Issued by
NWS Tulsa, OK
Area
Whole counties

County Washington County, OK

The radar

The Tulsa radar (KINX), 67 km from the middle of the area, began a volume at 05:56 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 watch it was issued in

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

IssuedProductOfficeLasted
May 1, 10:15 PM CDTTornado WatchSPC6 hr

The nearest sounding before it

Springfield, MO (KSGF), launched 00:00Z, 5.9 hours before the alert went out and 188 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, Springfield, MO at 00:00Z on 1997-05-02Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 0 joules per kilogram.LCL10008507005003002001001 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, Springfield, MO at 00:00Z on 1997-05-02The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 165 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
0 J/kg
Mixed-layer CIN
No buoyant parcel
Mixed-layer LCL
2611 m above ground
0-6 km bulk shear
62 kt
0-1 km storm-relative helicity
165 m²/s²
0-3 km storm-relative helicity
430 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

Open this sounding in Storm Lab

The text

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

000 
TTAA00 KTUL 020555 RRA
SVRTUL
OKC037-113-117-143-147-020700-
 
BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE TULSA OK
1255 AM CDT FRI MAY 2 1997
 
THE NATIONAL WEATHER SERVICE IN TULSA HAS ISSUED A
SEVERE THUNDERSTORM WARNING EFFECTIVE UNTIL  200 AM CDT
FOR PEOPLE IN THE FOLLOWING LOCATIONS...
 
IN NORTHEAST OKLAHOMA
 
   ...CREEK COUNTY...EASTERN OSAGE COUNTY
   ...EASTERN PAWNEE COUNTY...TULSA COUNTY...WASHINGTON COUNTY
 
AT 1255 AM...RADAR INDICATED A LINE OF SEVERE THUNDERSTORMS EXTENDING
FROM FORAKER TO BLACKBURN TO MARAMEC. THE LINE WAS MOVING EAST AT 50
MPH.
 
PAWHUSKA...BARTLESVILLE...SAND SPRINGS...SKIATOOK...AND MANNFORD ARE IN
THE PATH OF THIS LINE OF STORMS.
 
 
 
HAIL TO THE SIZE OF NICKELS AND WIND GUSTS TO 70 MPH CAN BE EXPECTED
IN THE WARNED AREA.
 
A TORNADO WATCH IS ALSO IN EFFECT FOR THE WARNED AREA.  REMEMBER...
SEVERE THUNDERSTORMS CAN AND OCCASIONALLY DO PRODUCE TORNADOES WITH
LITTLE OR NO ADVANCE WARNING.  REMAIN CALM BUT BE ALERT TO RAPIDLY
CHANGING WEATHER CONDITIONS.
 
KEEP TUNED TO THIS STATION FOR THE LATEST WEATHER BULLETINS.

The office that day

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

IssuedProductOfficeCountiesLasted
May 2, 12:09 AM CDTSevere Thunderstorm WarningTSAOsage, Pawnee51 min
May 2, 12:55 AM CDTSevere Thunderstorm WarningTSACreek, Osage, Pawnee, Tulsa65 min
May 2, 2:07 AM CDTSevere Thunderstorm WarningTSACreek53 min
May 2, 2:31 AM CDTSevere Thunderstorm WarningTSAOkmulgee, Tulsa44 min
May 2, 2:46 AM CDTSevere Thunderstorm WarningTSAMuskogee, Wagoner44 min
May 2, 3:30 AM CDTSevere Thunderstorm WarningTSACherokee, Muskogee30 min
May 2, 12:21 PM CDTSevere Thunderstorm WarningTSACraig39 min
May 2, 4:11 PM CDTSevere Thunderstorm WarningTSAHaskell49 min
May 2, 4:30 PM CDTSevere Thunderstorm WarningTSALeFlore45 min
May 2, 4:47 PM CDTTornado WarningTSALeFlore28 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.