Alert archive / Arkansas / Severe Thunderstorm Warnings in 1997
Severe Thunderstorm Warning 14, NWS Tulsa, OK
NWS Tulsa, OK issued this severe thunderstorm warning at Mar 1, 1997, 11:50 AM CST for Sebastian County, Arkansas; LeFlore County, Oklahoma. It was in force for 40 min. 4 reports came from inside the area while it was in force.
The area
The counties it named, with what was reported inside it.
The facts
- Issued
- Mar 1, 1997, 11:50 AM CST (17:50 UTC)
- Expired
- Mar 1, 1997, 12:30 PM CST
- In force
- 40 min
- Issued by
- NWS Tulsa, OK
- Area
- Whole counties
Counties Sebastian County, AR, LeFlore County, OK
What was reported inside it
| Time | Report | Where | Remark |
|---|---|---|---|
| Mar 1, 12:08 PM CST | Hail 0.75 | Greenwood, AR | |
| Mar 1, 12:10 PM CST | Hail 0.88 | Heavener, OK | |
| Mar 1, 12:15 PM CST | Hail 0.88 | Heavener, OK | |
| Mar 1, 12:40 PM CST | Hail 0.75 | Midland, AR |
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 nearest sounding before it
Springfield, MO (KSGF), launched 12:00Z, 5.8 hours before the alert went out and 215 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
- 0 J/kg
- Mixed-layer CIN
- No buoyant parcel
- Mixed-layer LCL
- 1533 m above ground
- 0-6 km bulk shear
- 63 kt
- 0-1 km storm-relative helicity
- 2 m²/s²
- 0-3 km storm-relative helicity
- 117 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted, in the capitals the NWS used until 2016.
000 TTAA00 KTUL 011751 RRA SVRTUL ARC131-OKC079-011830- BULLETIN - IMMEDIATE BROADCAST REQUESTED SEVERE THUNDERSTORM WARNING NATIONAL WEATHER SERVICE TULSA OK 1150 AM CST SAT MAR 1 1997 THE NATIONAL WEATHER SERVICE IN TULSA HAS ISSUED A SEVERE THUNDERSTORM WARNING EFFECTIVE UNTIL 1230 PM CST FOR PEOPLE IN THE FOLLOWING LOCATIONS... IN WEST CENTRAL ARKANSAS ...SEBASTIAN COUNTY IN SOUTHEAST OKLAHOMA ...LE FLORE COUNTY AT 1150 AM...RADAR INDICATED TWO SEVERE THUNDERSTORMS. ONE STORM WAS LOCATED 3 MILES SOUTHWEST OF MUSE...AND THE SECOND STORM WAS OVER SOUTHWEST SEBASTIAN COUNTY NEAR HARTFORD. BOTH STORMS WERE MOVING NORTHEAST AT 40 MPH. HAIL TO THE SIZE OF NICKELS AND WIND GUSTS TO 60 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 WlEATHER CONDITIONS. KEEP TUNED TO THIS STATION FOR THE LATEST WEATHER BULLETINS.
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 Mar 1, 10:49 AM CST, 1 hour 1 minute earlier.
Area forecast discussion, Mar 1, 10:49 AM CST, 1 hour 1 minute before
FPUS3 KTUL 011649 AFDTUL EASTERN OKLAHOMA/NORTHWEST ARKANSAS FORECAST DISCUSSION NATIONAL WEATHER SERVICE TULSA OK 1049 AM CST SAT MAR 1 1997 WL UPDATE MORNING PACKAGE FOR IMPROVED VSBYS /REMOVE DENSE FOG ADVSY/ AND FOR WORDING OF SHOWERS AND THUNDERSTORMS IN THE WESTERN ZONES. LOOKING AT THE MORNING UPPER AIR DATA...APPEARS THAT BEST OVERALL DYNAMIC FOR STRONG THUNDERSTORMS TO BE GENLY EAST AND SOUTH OF THE FORECAST AREA. BROAD 40-50 KT 850 MB JET AXIS EXTENDS FROM NEAR BR0-MEM-BNA WITH A MAX MOVG THROUGH ERN TX. 100-120 KT UPPER JET AXIS EXTENDS FROM BAJA-AMA-CHI. 16Z MESONET...VSBL SAT LOOPS...RADAR REFLECTIVITIES AND SURFACE ANALYISIS INDICATES THAT SLOW MOVG COLD FRONT ACRS CNTRL FCST ZONES FROM JUST SOUTH OF OKC TO NEAR GROVE. GETTING A FEW BREAKS IN THE CLOUDS ALONG AND AHEAD OF THE FNTL BNDRY. WL HAVE TO WATCH THIS AS CAPES ALREADY HIGH ENOUGH JUST TO THE SE... WITH LLVL FOCUS AND AMPLE UPPER DYNAMICS WITH RR QUAD OF UPPER JET SWINGING IN PLACE. WILL CONT TO WATCH LATEST TRENDS FOR THE ERN FCST ZONES. UPDATED ZONES AND AREA FORECAST OUT SHORTLY. .TUL... OK...NONE. AR...NONE.
The office that day
Everything else NWS Tulsa, OK issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Mar 1, 10:17 AM CST | Severe Thunderstorm Warning | TSA | Madison, Washington | 43 min |
| Mar 1, 12:27 PM CST | Severe Thunderstorm Warning | TSA | Sebastian | 48 min |
| Mar 1, 1:11 PM CST | Severe Thunderstorm Warning | TSA | Sebastian | 49 min |
Nearby
Severe Thunderstorm Warnings in Arkansas, 1997Severe 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.