Alert archive / Arkansas / Severe Thunderstorm Warnings in 1994

Severe Thunderstorm Warning 341, NWS Tulsa, OK

July 17, 1994Sebastian County, Arkansas; LeFlore County, Oklahoma

NWS Tulsa, OK issued this severe thunderstorm warning at Jul 17, 1994, 5:05 PM CDT for Sebastian County, Arkansas; LeFlore County, Oklahoma. It was in force for 70 min.

The area

The counties it named.

The facts

Issued
Jul 17, 1994, 5:05 PM CDT (22:05 UTC)
Expired
Jul 17, 1994, 6:15 PM CDT
In force
70 min
Issued by
NWS Tulsa, OK
Area
Whole counties

Counties Sebastian County, AR, LeFlore County, OK

The nearest sounding before it

Springfield, MO (KUMN), launched 12:00Z, 10.1 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.

Skew-T log-pSkew-T log-p diagram, Springfield, MO at 12:00Z on 1994-07-17Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 2818 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 12:00Z on 1994-07-17The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 113 square meters per square second.1939Sfc1 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
2818 J/kg
Mixed-layer CIN
-14 J/kg
Mixed-layer LCL
780 m above ground
0-6 km bulk shear
15 kt
0-1 km storm-relative helicity
113 m²/s²
0-3 km storm-relative helicity
135 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 172209 COR
SVRTUL
ARC131-OKC079-172300-

BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING...CORRECTION
NATIONAL WEATHER SERVICE TULSA OK
505 PM CDT SUN JUL 17 1994

THE NATIONAL WEATHER SERVICE IN TULSA HAS ISSUED A
SEVERE THUNDERSTORM WARNING EFFECTIVE UNTIL  615 PM CDT
FOR PEOPLE IN THE FOLLOWING LOCATIONSS...

IN WEST CENTRAL ARKANSAS

   ...SOUTHERN SEBASTIAN COUNTY


IN SOUTHEAST OKLAHOMA

   ...LE FLORE COUNTY

AT 504 PM...RADAR INDICATED A LINE OF DEVELOPING SEVERE THUNDERSTORMS
ACROSS THE CENTRAL PART OF LEFLORE COUNTY. THE STRONGEST STORMS AT 504
PM WERE NEAR THE OKLAHOMA ARKANSAS BORDER ABOUT 10 MILES NORTHEAST OF
POTEAU. OTHER SEVERE STORMS WERE DEVELOPING TO THE WEST OF THIS STORM
NEAR FANSHAWE.

THE STORMS WERE MOVING SOUTHEAST AT 15 MPH.


HAIL TO THE SIZE OF QUARTERS AND WIND GUSTS TO 65 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 EXERCISE CARE WHEN APPROACHING LOW WATER
CROSSINGS.

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 Jul 17, 3:37 PM CDT, 1 hour 28 minutes earlier.

Area forecast discussion, Jul 17, 3:37 PM CDT, 1 hour 28 minutes before
FPUS3 KTUL 172037

AREA FORECAST DISCUSSION FOR EASTERN OKLAHOMA
NATIONAL WEATHER SERVICE TULSA OK
33O PM CDT SUN JUL 17 1994

OUTFLOW BNDRY EVIDENT OVR SERN OK THIS MRNG HAS GRAD WASHED OUT
DURING THE DAY AS LLVL WNDS HV RETURNED TO SWLY ACRS THE AREA.
AMS IN THE XTRM SE STILL VERY UNSTBL...AND ALTHO NO SIG CU FIELD
VSBL ON SATL...STILL XPCT TO SEE ISOLD/WDLY SCTD TRW DVLP IN THE
SE THIS EVNG.  OVR THE NRN PART OF FA FOR TNGT...STILL SOME POTNTL
FOR TSTM DVLPMNT WELL OFF TO THE NW ONCE AGN WITH STMS MOVG SEWRD
AND PSBLY AFFECTING AREA LATE TNGT...ALTHO FLOW ALFT A LTL WKR.
WL MENTION POPS ONLY IN THE 20-30 PCT RANGE.  WL THEN SHOOT FOR
A DRY FCST MON THRU TUE AS UPR RDG BCMS A LTL BTR ESTABLISHED OVR
THE AREA.  TEMPWISE...SEE LTL CHG IN MINS NXT FEW NGTS WITH MAX
TEMPS WRMG SLGTLY.

PRELIM NUMBERS:  TUL 74/94/74/95 2111  BVO 71/95/71/96 2111
                 MLC 73/95/73 96 2111  IDB 71/94/71/95 2111
...04...

.TUL...NONE.

In the hours before

Local storm report, Jul 17, 2:03 PM CDT, 3 hours 2 minutes before
STORM REPORT
NATIONAL WEATHER SERVICE TULSA, OK
203 PM CDT SUN JUL 17 1994

...DELAYED REPORT FROM SATURDAY JULY 16 1994...

TIME (CDT)     COUNTY/STATE     EVENT

555 PM         LE FLORE/OK      DIME XSIZE HAIL AND TREE LIMBS DOWN IN
                                SUMMERFIELD
Local storm report, Jul 17, 2:05 PM CDT, 3 hours before
STORM REPORT
NATIONAL WEATHER SERVICE TULSA OK
205 PM CDT SUN JUL 17 1994

...DELAYED REPORTS FROM THIS MORNING...

TIME (CDT)     COUNTY/STATE     EVENT

615 AM         WASHINGTON/OK    DIME SIZE HAIL JUST NORTH OF DEWEY

615 AM         WASHINGTON/OK    WINDOW BLOWN OUT AT AN ARBY`S
                                RESTAURANT ON THE NORTHEAST SIDE OF
                                BARTLESVILLE
Local storm report, Jul 17, 2:05 PM CDT, 3 hours before
STORM REPORT
NATIONAL WEATHER SERVICE TULSA OK
205 PM CDT SUN JUL 17 1994

...DELAYED REPORTS FROM THIS MORNING...

TIME (CDT)     COUNTY/STATE     EVENT

615 AM         WASHINGTON/OK    DIME SIZE HAIL\ JUST NORTH OF DEWEY

615 AM         WASHINGTON/OK    WINDOW BLOWN OUT AT AN ARBY`S
                                RESTAURANT ON THE NORTHEAST SIDE OF
                                BARTLESVILLE

The office that day

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

IssuedProductOfficeCountiesLasted
Jul 17, 5:48 PM CDTSevere Thunderstorm WarningTSAMadison27 min
Jul 16, 7:11 PM CDTFlash Flood WarningTSALeFlore2 hr
Jul 17, 5:42 AM CDTSevere Thunderstorm WarningTSANowata, Washington63 min
Jul 17, 6:22 PM CDTSevere Thunderstorm WarningTSALeFlore68 min

Nearby

Severe Thunderstorm Warnings in Arkansas, 1994Severe Thunderstorm Warnings in Oklahoma, 1994Every severe thunderstorm warning in 1994

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.