Alert archive / Oklahoma / Tornado Watches in 1998

Tornado Watch 536

June 9, 19986 counties in Arkansas; 11 counties in Oklahoma; 11 counties in Texas

The Storm Prediction Center issued this tornado watch at Jun 9, 1998, 7:45 PM CDT for 6 counties in Arkansas; 11 counties in Oklahoma; 11 counties in Texas. It was in force for 5 hr.

The area

The outline as issued.

The facts

Issued: Jun 9, 1998, 7:45 PM CDT (00:45 UTC)
Expired: Jun 10, 1998, 1:00 AM CDT
In force: 5 hr
Issued by: the Storm Prediction Center

All 28 counties

Logan County, AR, Polk County, AR, Scott County, AR, Sebastian County, AR, Sevier County, AR, Yell County, AR, Atoka County, OK, Bryan County, OK, Choctaw County, OK, Coal County, OK, Haskell County, OK, Latimer County, OK, LeFlore County, OK, Marshall County, OK, McCurtain County, OK, Pittsburg County, OK, Pushmataha County, OK, Collin County, TX, Delta County, TX, Denton County, TX, Fannin County, TX, Franklin County, TX, Grayson County, TX, Hopkins County, TX, Hunt County, TX, Lamar County, TX, Red River County, TX, Titus County, TX

The radar

The Western Arkansas radar (KSRX), 203 km from the middle of the area, began a volume at 00:34 UTC, the scan nearest the moment this went out.

Open the radar archive at this moment

The archived warnings, watches and discussions in force at that minute are drawn over the scan, this one among them.

Warnings issued inside it

11 tornado, severe thunderstorm and flash flood warnings for its counties while it was in force.

Issued	Product	Office	Counties	Lasted
Jun 9, 7:58 PM CDT	Severe Thunderstorm Warning	OUN	Coal	47 min
Jun 9, 8:06 PM CDT	Severe Thunderstorm Warning	OUN	Atoka, Bryan	39 min
Jun 9, 8:37 PM CDT	Severe Thunderstorm Warning	TSA	Choctaw, Pushmataha	68 min
Jun 9, 8:43 PM CDT	Severe Thunderstorm Warning	OUN	Atoka, Coal	47 min
Jun 9, 8:43 PM CDT	Severe Thunderstorm Warning	OUN	Bryan	47 min
Jun 9, 9:31 PM CDT	Severe Thunderstorm Warning	TSA	Choctaw, Pushmataha	59 min
Jun 9, 9:31 PM CDT	Severe Thunderstorm Warning	TSA	Latimer, Pittsburg	59 min
Jun 9, 9:34 PM CDT	Severe Thunderstorm Warning	SHV	McCurtain	86 min
Jun 9, 9:47 PM CDT	Severe Thunderstorm Warning	TSA	LeFlore	73 min
Jun 9, 10:46 PM CDT	Severe Thunderstorm Warning	LZK	Polk	49 min
Jun 10, 12:47 AM CDT	Severe Thunderstorm Warning	OUN	Coal	28 min

The nearest sounding before it

Fort Worth, TX (KFWD), launched 00:00Z, 0.8 hours before the alert went out and 182 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-p

Temperature in red, dew point in green, the mixed-layer parcel dashed.

Hodograph

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: 3037 J/kg
Mixed-layer CIN: -21 J/kg
Mixed-layer LCL: 1504 m above ground
0-6 km bulk shear: 23 kt
0-1 km storm-relative helicity: 60 m²/s²
0-3 km storm-relative helicity: 144 m²/s²
Significant tornado parameter: 0.8
Supercell composite: 10.5

Open this sounding in Storm Lab

The text

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

929 
WWUS9 KMKC 100003
SEL6  
MKC WW 100003
OKZ000-TXZ000-ARZ000-100600-

BULLETIN - IMMEDIATE BROADCAST REQUESTED
TORNADO WATCH NUMBER 536
STORM PREDICTION CENTER NORMAN OK
703 PM CDT TUE JUN 9 1998

THE STORM PREDICTION CENTER HAS ISSUED A
TORNADO WATCH FOR PORTIONS OF

   SOUTHEAST OKLAHOMA                           
   NORTH TEXAS                              
   SOUTHWEST ARKANSAS                           

EFFECTIVE THIS TUESDAY NIGHT AND WEDNESDAY MORNING FROM 745 PM
UNTIL 100 AM CDT.

TORNADOES...HAIL TO 2 INCHES IN DIAMETER...THUNDERSTORM WIND GUSTS
TO 80 MPH...AND DANGEROUS LIGHTNING ARE POSSIBLE IN THESE AREAS.

THE TORNADO WATCH AREA IS ALONG AND 75 STATUTE MILES EAST AND WEST
OF A LINE FROM 65 MILES SOUTH OF DURANT OKLAHOMA TO FORT SMITH
ARKANSAS.

REMEMBER...A TORNADO WATCH MEANS CONDITIONS ARE FAVORABLE FOR
TORNADOES AND SEVERE THUNDERSTORMS IN AND CLOSE TO THE WATCH AREA. 
PERSONS IN THESE AREAS SHOULD BE ON THE LOOKOUT FOR THREATENING
WEATHER CONDITIONS AND LISTEN FOR LATER STATEMENTS AND POSSIBLE
WARNINGS.

OTHER WATCH INFORMATION...  CONTINUE...WW 535...

DISCUSSION...VERY INTENSE SEVER STORMS VICINITY RED RIVER VALLEY
WILL CONTINUE TO PROPAGE E/NE INTO A VERY UNSTABLE AIRMASS WITH
CAPES TO 5000 J/KG.  EVEN THOUGH WIND PROFILES MARGINAL FOR
SUPERCELLS/TORNADOS...EXTREME CAPE SUPPORT ISOLATED TORNADOES.


AVIATION...TORNADOES AND A FEW SEVERE THUNDERSTORMS WITH HAIL
SURFACE AND ALOFT TO 2 INCHES.  EXTREME TURBULENCE AND SURFACE WIND
GUSTS TO 70 KNOTS.  A FEW CUMULONIMBI WITH MAXIMUM TOPS TO 550. 
MEAN STORM MOTION VECTOR 26030.


...HALES

330,0974 351,0954 351,0930 330,0950

SPC that day

Everything else SPC issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
Jun 9, 10:30 PM CDT	Severe Thunderstorm Watch	SPC	Arkansas, Bradley, Calhoun, Clark, Cleveland, Columbia and 25 more	6 hr

Nearby

Tornado Watches in Oklahoma, 1998 Tornado Watches in Texas, 1998 Tornado Watches in Arkansas, 1998 Every tornado watch in 1998

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; radar from the NEXRAD Level II archive.