Alert archive / Arkansas / Severe Thunderstorm Warnings in 1997
Severe Thunderstorm Warning 15, NWS Tulsa, OK
NWS Tulsa, OK issued this severe thunderstorm warning at Mar 1, 1997, 12:27 PM CST for Sebastian County, Arkansas; LeFlore County, Oklahoma. It was in force for 48 min. 2 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, 12:27 PM CST (18:27 UTC)
- Expired
- Mar 1, 1997, 1:15 PM CST
- In force
- 48 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, 12:40 PM CST | Hail 0.75 | Midland, AR | |
| Mar 1, 1:12 PM CST | Hail 0.75 | Pocola, OK | Isolated severe thunderstorms developed in Le Flore County of southeast Oklahoma during the early afternoon of March 1st. The storms produced nickel size hail 1 mile southwest of Heavener and 4 miles southwest of Heavener and dime size hail 3 miles west of Poc |
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, 6.5 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 011829 RRA SVRTUL ARC131-OKC079-011915- BULLETIN - IMMEDIATE BROADCAST REQUESTED SEVERE THUNDERSTORM WARNING NATIONAL WEATHER SERVICE TULSA OK 1227 PM CST SAT MAR 1 1997 THE NATIONAL WEATHER SERVICE IN TULSA HAS ISSUED A SEVERE THUNDERSTORM WARNING EFFECTIVE UNTIL 115 PM CST FOR PEOPLE IN THE FOLLOWING LOCATIONS... IN WEST CENTRAL ARKANSAS ...NORTHERN SEBASTIAN COUNTY IN SOUTHEAST OKLAHOMA ...NORTHERN LE FLORE COUNTY AT 1227 PM...NATIONAL WEATHER SERVICE RADAR INDICATED A SEVERE THUNDERSTORM 2 MILES SOUTH OF POTEAU MOVING TO THE NORTHEAST AT 45 MPH. HACKETT AND FORT SMITH ARE IN THE PATH OF THIS STORM. 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 WEATHER 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 38 minutes earlier.
Area forecast discussion, Mar 1, 10:49 AM CST, 1 hour 38 minutes 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, 11:50 AM CST | Severe Thunderstorm Warning | TSA | Sebastian | 40 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.