Alert archive / Oklahoma / Severe Thunderstorm Warnings in 1993

Severe Thunderstorm Warning 21, NWS Tulsa, OK

March 30, 1993LeFlore County, Sequoyah County, Oklahoma

NWS Tulsa, OK issued this severe thunderstorm warning at Mar 30, 1993, 4:20 AM CST for LeFlore County, Sequoyah County, Oklahoma. It was in force for 55 min.

The area

The counties it named.

The facts

Issued
Mar 30, 1993, 4:20 AM CST (10:20 UTC)
Expired
Mar 30, 1993, 5:15 AM CST
In force
55 min
Issued by
NWS Tulsa, OK
Area
Whole counties

Counties LeFlore County, OK, Sequoyah County, OK

The nearest sounding before it

Springfield, MO (KUMN), launched 00:00Z, 10.3 hours before the alert went out and 207 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 1993-03-30Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 5 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, Springfield, MO at 00:00Z on 1993-03-30The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 16 square meters per square second.193958Sfc1 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
5 J/kg
Mixed-layer CIN
-54 J/kg
Mixed-layer LCL
2451 m above ground
0-6 km bulk shear
26 kt
0-1 km storm-relative helicity
16 m²/s²
0-3 km storm-relative helicity
46 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.2

Open this sounding in Storm Lab

The text

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

000 
TTAA00 KFSM 301022
SVRFSM
ARC143-OKC079-135-301115-
 
BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE FORT SMITH AR
420 AM CST TUE MAR 30 1993
 
THE NATIONAL WEATHER SERVICE IN FORT SMITH HAS ISSUED A
SEVERE THUNDERSTORM WARNING EFFECTIVE UNTIL  515 AM CST
FOR PEOPLE IN THE FOLLOWING LOCATIONS...
 
IN NORTHWEST ARKANSAS
 
   ...WASHINGTON COUNTY
 
 
IN EAST CENTRAL OKLAHOMA
 
   ...LE FLORE COUNTY...SEQUOYAH COUNTY
 
AT 420 AM THE FORT SMITH RADAR INDICATED A SEVERE THUNDERSTORM NEAR
WINSLOW ARKANSAS MOVING NORTHEAST AT 35 MPH AND A LINE OF SEVERE
THUNDERSTORMS FROM JUST SOUTHWEST OF SALLISAW TO RED OAK OKLAHOMA
MOVING NORTHEAST AT 35 MPH.
 
 
 
 
SEVERE THUNDERSTORMS PRODUCE DAMAGING WIND IN EXCESS OF 55
MPH...DESTRUCTIVE HAIL...DEADLY LIGHTNING...AND VERY HEAVY RAIN.
FOR YOUR PROTECTION MOVE TO AN INTERIOR ROOM ON THE LOWEST FLOOR
OF YOUR HOME OR BUSINESS.  HEAVY RAINS FLOOD ROADS QUICKLY SO
DON'T DRIVE INTO AREAS WHERE WATER COVERS THE ROAD.

The office that day

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

IssuedProductOfficeCountiesLasted
Mar 30, 1:24 AM CSTSevere Thunderstorm WarningTSACreek, Okmulgee51 min
Mar 30, 2:05 AM CSTSevere Thunderstorm WarningTSAPittsburg55 min
Mar 30, 2:57 AM CSTSevere Thunderstorm WarningTSAPittsburg48 min
Mar 30, 3:30 AM CSTSevere Thunderstorm WarningTSAHaskell60 min
Mar 30, 4:06 AM CSTSevere Thunderstorm WarningTSALatimer54 min
Mar 30, 4:20 AM CSTSevere Thunderstorm WarningTSAHaskell40 min
Mar 30, 5:15 AM CSTSevere Thunderstorm WarningTSALeFlore45 min
Mar 30, 5:23 AM CSTTornado WarningTSALeFlore37 min
Mar 30, 2:12 PM CSTSevere Thunderstorm WarningTSAOsage63 min
Mar 30, 2:26 PM CSTSevere Thunderstorm WarningTSAPawnee49 min
Mar 30, 3:14 PM CSTSevere Thunderstorm WarningTSAOsage46 min

Nearby

Severe Thunderstorm Warnings in Oklahoma, 1993Every severe thunderstorm warning in 1993

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.