Alert archive / Oklahoma / Severe Thunderstorm Warnings in 1997
Severe Thunderstorm Warning 240, NWS Tulsa, OK
NWS Tulsa, OK issued this severe thunderstorm warning at Jul 8, 1997, 1:41 PM CDT for LeFlore County, Oklahoma. It was in force for 49 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 8, 1997, 1:41 PM CDT (18:41 UTC)
- Expired
- Jul 8, 1997, 2:30 PM CDT
- In force
- 49 min
- Issued by
- NWS Tulsa, OK
- Area
- Whole counties
County LeFlore County, OK
The nearest sounding before it
Springfield, MO (KSGF), launched 12:00Z, 6.7 hours before the alert went out and 237 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.
- Mixed-layer CAPE
- 959 J/kg
- Mixed-layer CIN
- -114 J/kg
- Mixed-layer LCL
- 804 m above ground
- 0-6 km bulk shear
- 13 kt
- 0-1 km storm-relative helicity
- 116 m²/s²
- 0-3 km storm-relative helicity
- 214 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted, in the capitals the NWS used until 2016.
977 WUUS1 KTUL 081842 RRA SVRTUL OKC079-081930- BULLETIN - IMMEDIATE BROADCAST REQUESTED SEVERE THUNDERSTORM WARNING NATIONAL WEATHER SERVICE TULSA OK 141 PM CDT TUE JUL 8 1997 THE NATIONAL WEATHER SERVICE IN TULSA HAS ISSUED A SEVERE THUNDERSTORM WARNING EFFECTIVE UNTIL 230 PM CDT FOR PEOPLE IN THE FOLLOWING LOCATION... IN SOUTHEAST OKLAHOMA ...NORTHERN LE FLORE COUNTY AT 141 PM...RADAR INDICATED A SEVERE THUNDERSTORN 7 MILES NORTHEAST OF POTEAU. THE STORM WAS MOVING EAST AT 10 MPH. AREAS SOUTHWEST OF HACKETT WILL BE AFFECTED BY THIS STORM. HAIL TO THE SIZE OF DIMES AND WIND GUSTS TO 60 MPH CAN BE EXPECTED IN THE WARNED AREA. DURING THE STORM MOVE INDOORS AND STAY AWAY FROM WINDOWS. TO PROTECT YOURSELF FROM LIGHTNING DO NOT USE THE TELEPHONE OR HAND HELD ELECTRICAL APPLIANCES...UNLESS IN AN EMERGENCY. MOTORISTS SHOULD BE ALERT FOR WATER ON ROADWAYS AND NEVER DRIVE ONTO A FLOODED ROAD.
What forecasters said that day
The local office's own words before this severe thunderstorm warning went out, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.
NWS Tulsa, OK wrote its last area forecast discussion before this severe thunderstorm warning went out at Jul 8, 10:36 AM CDT, 3 hours 5 minutes earlier.
Area forecast discussion, Jul 8, 10:36 AM CDT, 3 hours 5 minutes before
EASTERN OKLAHOMA/NORTHWEST ARKANSAS FORECAST DISCUSSION...UPDATED NATIONAL WEATHER SERVICE TULSA OK 1030 AM CDT TUE JUL 8 1997 THE MCS MOVG SWD ACRS XTRM ERN OK AND NW AR HAS PRODUCED A SGFNT OUTFLOW BNDRY. THIS BNDRY IS MOVING THRU RATHER UNSTABLE AIR AND THE RESULT IS DVLPMT OF NEW TSTMS JUST BEHIND THE BNDRY. XPC THESE TSTMS TO CONT DVLPG AND MOVG SOUTH. THESE SHD AFFECT ONLY THE XTRM ERN OK COUNTIES AND CRAWFORD AND SEBASTIAN COUNTIES IN AR. SINCE THE AMS IS UNSTABLE...THESE TSTMS COULD EVENTUALLY REACH MCCURTAIN COUNTY. STLT SHOWS THE MCS APRS TO BE DVLPG INTO A NEDDY EDDY JUST SE OF MKC...AND IS MOVING ESE. IT SHD NOT ENHANCE ANY PCPN IN ERN OK OR NW AR THIS AFTN. BUT THE OUTFLOW BNDRY WILL PROVIDE A FOCUS FOR RW/TRW DURG THE AFTN...SO WILL INCR POPS A LITTLE AND GENLY GIVE ALL AREAS A CHC OR SLGT CHC OF PCPN. IN SHORT...WILL UPDATE THE CURRENT ZONES TO REFLECT THE RW/TRW CHCS FOR LATE THIS MORNING...AND XPC TO UPDATE( AGAIN EARLY THIS AFTN AFTER THE PCPN ENDS. /02 .TUL... OK...NONE. AR...NONE.
In the hours before
Special weather statement, Jul 8, 1:00 PM CDT, 41 minutes before
ARZ001-002-010-011-019-029-OKZ054>076-091200- EASTERN OKLAHOMA/NORTHWEST ARKANSAS THUNDERSTORM OUTLOOK NATIONAL WEATHER SERVICE TULSA OK 100 PM CDT TUE JUL 8 1997 A FEW SEVERE THUNDERSTORMS ARE POSSIBLE ACROSS EASTERN OKLAHOMA AND NORTHWEST ARKANSAS THIS AFTERNOON AND TONIGHT. AN OUTFLOW BOUNDARY FROM MORNING THUNDERSTORMS WAS LOCATED ACROSS WEST CENTRAL ARKANSAS AND EASTERN OKLAHOMA THIS AFTERNOON. AT 100 PM...THE BOUNDARY HAD BECOME NEARLY STATIONARY FROM SOUTH OF FORT SMITH ARKANSAS TO NEAR OKEMAH TO NEAR STILLWATER. THE BOUNDARY IS EXPECTED TO GRADUALLY WEAKEN THIS AFTERNOON. MODERATELY UNSTABLE AIR AND LIFTING NEAR THE OUTFLOW BOUNDARY WILL ALLOW WIDELY SCATTERED THUNDERSTORMS TO DEVELOP ACROSS THE AREA THIS AFTERNOON. THE MOST LIKELY AREAS FOR DEVELOPMENT WILL BE ALONG AND NORTH OF THE BOUNDARY ACROSS WEST CENTRAL ARKANSAS AND EXTREME EASTERN OKLAHOMA. THE DEGREE OF INSTABILITY SUGGESTS THAT PULSE SEVERE THUNDERSTORMS ARE POSSIBLE DESPITE WEAK WIND FIELDS. THUNDERSTORMS ARE LESS LIKELY SOUTH OF THE OUTFLOW BOUNDARY WHERE A LAYER OF WARM AIR ALOFT SHOULD LIMIT THUNDERSTORM DEVELOPMENT. ADDITIONAL THUNDERSTORM DEVELOPMENT IS EXPECTED NEAR A COLD FRONT ACROSS KANSAS OR MISSOURI LATE THIS AFTERNOON AND EVENING. ANY STORMS THAT FORM IN THAT AREA WILL SPREAD TO THE SOUTH DURING THE NIGHT...AND COULD AFFECT NORTHEAST OKLAHOMA AND NORTHWEST ARKANSAS AFTER MIDNIGHT. ALTHOUGH ORGANIZED SEVERE WEATHER IS NOT EXPECTED IN EASTERN OKLAHOMA OR NORTHWEST ARKANSAS...SOME OF THE STORMS COULD PRODUCE DAMAGING WIND GUSTS AND NICKEL SIZE HAIL. SPOTTER GROUPS AND EMERGENCY MANAGEMENT AGENCIES ACROSS NORTHEAST OKLAHOMA AND NORTHWEST ARKANSAS ARE URGED TO LISTEN TO THE LATEST FORECASTS AND BE PREPARED FOR ACTIVATION THROUGH TONIGHT.
Special weather statement, Jul 8, 1:03 PM CDT, 38 minutes before
ARZ001-002-010-011-019-029-OKZ054>076-091200- EASTERN OKLAHOMA/NORTHWEST ARKANSAS THUNDERSTORM OUTLOOK NATIONAL WEATHER SERVICE TULSA OK 100 PM CDT TUE JUL 8 1997 A FEW SEVERE THUNDERSTORMS ARE POSSIBLE ACROSS EASTERN OKLAHOMA AND NORTHWEST ARKANSAS THIS AFTERNOON AND TONIGHT. AN OUTFLOW BOUNDARY FROM MORNING THUNDERSTORMS WAS LOCATED ACROSS WEST CENTRAL ARKANSAS AND EASTERN OKLAHOMA THIS AFTERNOON. AT 100 PM...THE BOUNDARY HAD BECOME NEARLY STATIONARY FROM SOUTH OF FORT SMITH ARKANSAS TO NEAR OKEMAH TO NEAR STILLWATER. THE BOUNDARY IS EXPECTED TO GRADUALLY WEAKEN THIS AFTERNOON. MODERATELY UNSTABLE AIR AND LIFTING NEAR THE OUTFLOW BOUNDARY WILL ALLOW WIDELY SCATTERED THUNDERSTORMS TO DEVELOP ACROSS THE AREA THIS AFTERNOON. THE MOST LIKELY AREAS FOR DEVELOPMENT WILL BE ALONG AND NORTH OF THE BOUNDARY ACROSS WEST CENTRAL ARKANSAS AND EXTREME EASTERN OKLAHOMA. THE DEGREE OF INSTABILITY SUGGESTS THAT PULSE SEVERE THUNDERSTORMS ARE POSSIBLE DESPITE WEAK WIND FIELDS. THUNDERSTORMS ARE LESS LIKELY SOUTH OF THE OUTFLOW BOUNDARY WHERE A LAYER OF WARM AIR ALOFT SHOULD LIMIT THUNDERSTORM DEVELOPMENT. ADDITIONAL THUNDERSTORM DEVELOPMENT IS EXPECTED NEAR A COLD FRONT ACROSS KANSAS OR MISSOURI LATE THIS AFTERNOON AND EVENING. ANY STORMS THAT FORM IN THAT AREA WILL SPREAD TO THE SOUTH DURING THE NIGHT...AND COULD AFFECT NORTHEAST OKLAHOMA AND NORTHWEST ARKANSAS AFTER MIDNIGHT. ALTHOUGH ORGANIZED SEVERE WEATHER IS NOT EXPECTED IN EASTERN OKLAHOMA OR NORTHWEST ARKANSAS...SOME OF THE STORMS COULD PRODUCE DAMAGING WIND GUSTS AND NICKEL SIZE HAIL. SPOTTER GROUPS AND EMERGENCY MANAGEMENT AGENCIES ACROSS NORTHEAST OKLAHOMA AND NORTHWEST ARKANSAS ARE URGED TO LISTEN TO THE LA~TEST FORECASTS AND BE PREPARED FOR ACTIVATION THROUGH TONIGHT.
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.