Alert archive / Oklahoma / Tornado Watches in 1998

Tornado Watch 209

April 14, 199840 counties in Oklahoma; 7 counties in Texas

The Storm Prediction Center issued this tornado watch at Apr 14, 1998, 3:45 PM CDT for 40 counties in Oklahoma; 7 counties in Texas. It was in force for 6 hr.

The area

The outline as issued.

The facts

Issued: Apr 14, 1998, 3:45 PM CDT (20:45 UTC)
Expired: Apr 14, 1998, 10:00 PM CDT
In force: 6 hr
Issued by: the Storm Prediction Center

All 47 counties

Caddo County, OK, Canadian County, OK, Carter County, OK, Cleveland County, OK, Comanche County, OK, Cotton County, OK, Craig County, OK, Creek County, OK, Garfield County, OK, Garvin County, OK, Grady County, OK, Hughes County, OK, Jefferson County, OK, Kay County, OK, Kingfisher County, OK, Kiowa County, OK, Lincoln County, OK, Logan County, OK, Love County, OK, Mayes County, OK, McClain County, OK, Murray County, OK, Noble County, OK, Nowata County, OK, Okfuskee County, OK, Oklahoma County, OK, Okmulgee County, OK, Osage County, OK, Ottawa County, OK, Pawnee County, OK, Payne County, OK, Pontotoc County, OK, Pottawatomie County, OK, Rogers County, OK, Seminole County, OK, Stephens County, OK, Tillman County, OK, Tulsa County, OK, Wagoner County, OK, Washington County, OK, Archer County, TX, Baylor County, TX, Clay County, TX, Knox County, TX, Montague County, TX, Wichita County, TX, Wilbarger County, TX

The radar

The Norman radar (KTLX), 88 km from the middle of the area, began a volume at 20:45 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

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

Issued	Product	Office	Counties	Lasted
Apr 14, 3:54 PM CDT	Severe Thunderstorm Warning	OUN	Caddo, Kiowa	51 min
Apr 14, 4:07 PM CDT	Severe Thunderstorm Warning	OUN	Caddo, Canadian	48 min
Apr 14, 4:38 PM CDT	Severe Thunderstorm Warning	OUN	Caddo	52 min
Apr 14, 4:50 PM CDT	Severe Thunderstorm Warning	OUN	Grady	40 min
Apr 14, 4:54 PM CDT	Tornado Warning	OUN	Caddo	36 min
Apr 14, 5:23 PM CDT	Severe Thunderstorm Warning	OUN	Garvin, Grady, McClain	42 min
Apr 14, 5:35 PM CDT	Severe Thunderstorm Warning	OUN	Tillman	25 min
Apr 14, 5:55 PM CDT	Severe Thunderstorm Warning	OUN	Cotton, Tillman	50 min
Apr 14, 5:55 PM CDT	Severe Thunderstorm Warning	TSA	Pawnee	50 min
Apr 14, 5:59 PM CDT	Severe Thunderstorm Warning	OUN	Garvin, McClain	46 min
Apr 14, 6:06 PM CDT	Severe Thunderstorm Warning	OUN	Archer	34 min
Apr 14, 6:10 PM CDT	Severe Thunderstorm Warning	TSA	Osage	50 min
Apr 14, 6:20 PM CDT	Severe Thunderstorm Warning	OUN	Noble	25 min
Apr 14, 6:28 PM CDT	Severe Thunderstorm Warning	OUN	Stephens	47 min
Apr 14, 6:35 PM CDT	Severe Thunderstorm Warning	TSA	Osage	40 min
Apr 14, 6:42 PM CDT	Severe Thunderstorm Warning	OUN	Garvin, Murray, Pontotoc	33 min
Apr 14, 7:00 PM CDT	Tornado Warning	OUN	Garvin, Pontotoc	30 min
Apr 14, 9:03 PM CDT	Severe Thunderstorm Warning	TSA	Osage	42 min
Apr 14, 9:10 PM CDT	Severe Thunderstorm Warning	OUN	Kay	35 min
Apr 14, 9:30 PM CDT	Severe Thunderstorm Warning	TSA	Nowata, Washington	45 min

The nearest sounding before it

Norman, OK (KOUN), launched 12:00Z, 8.8 hours before the alert went out and 72 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: 0 J/kg
Mixed-layer CIN: No buoyant parcel
Mixed-layer LCL: 2302 m above ground
0-6 km bulk shear: 50 kt
0-1 km storm-relative helicity: 169 m²/s²
0-3 km storm-relative helicity: 248 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.

994 
WWUS9 KMKC 142019
SEL9  
MKC WW 142019
OKZ000-TXZ000-150300-

BULLETIN - IMMEDIATE BROADCAST REQUESTED
TORNADO WATCH NUMBER 209
STORM PREDICTION CENTER NORMAN OK
319 PM CDT TUE APR 14 1998

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

   OKLAHOMA                           
   NORTHWEST TEXAS                              

EFFECTIVE THIS TUESDAY AFTERNOON AND EVENING FROM 345 PM UNTIL 1000
PM CDT.

TORNADOES...HAIL TO 3 INCHES IN DIAMETER...THUNDERSTORM WIND GUSTS
TO 85 MPH...AND DANGEROUS LIGHTNING ARE POSSIBLE IN THESE AREAS.

THE TORNADO WATCH AREA IS ALONG AND 80 STATUTE MILES EAST AND WEST
OF A LINE FROM 45 MILES SOUTH SOUTHWEST OF WICHITA FALLS TEXAS TO
15 MILES NORTH NORTHWEST OF BARTLESVILLE OKLAHOMA.

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 208...

DISCUSSION...SCATTERED SUPERCELLS EXPECTED ALONG QUASI STATIONARY
DRY LINE THIS EVENING AS WEAK LOW LEVEL CONVERGENCE CONTINUES ALONG
AND NE OF SURFACE WAVE NOW BETWEEN CDS AND SPS.  AMPLE BOUNDARY
LAYER MOISTURE AND MODESTLY STEEP MID LEVEL LAPSE RATES TO SUPPORT 
LARGE HAIL/DAMAGING WINDS...AND ISOLATED TORNADOES.   

AVIATION...TORNADOES AND A FEW SEVERE THUNDERSTORMS WITH HAIL
SURFACE AND ALOFT TO 3 INCHES.  EXTREME TURBULENCE AND SURFACE WIND
GUSTS TO 75 KNOTS.  A FEW CUMULONIMBI WITH MAXIMUM TOPS TO 500. 
MEAN STORM MOTION VECTOR 24040.


...CORFIDI

332,1001 365,0973 365,0944 332,0972

Nearby

Tornado Watches in Oklahoma, 1998 Tornado Watches in Texas, 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.