Tornado Watch 15

Issued

Jan 21, 1998, 2:15 PM CST (20:15 UTC)

Expired

Jan 21, 1998, 8:00 PM CST

In force

6 hr

Issued by

the Storm Prediction Center

The Houston radar (KHGX), 77 km from the middle of the area, began a volume at 20:14 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.

209 
WWUS9 KMKC 211947
SEL5  
MKC WW 211947
TXZ000-LAZ000-220200-

BULLETIN - IMMEDIATE BROADCAST REQUESTED
TORNADO WATCH NUMBER 15
STORM PREDICTION CENTER NORMAN OK
147 PM CST WED JAN 21 1998

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

   SOUTHEAST TEXAS                              
   SOUTHWEST LOUISIANA                          
   AND ADJACENT COASTAL WATERS

EFFECTIVE THIS WEDNESDAY AFTERNOON AND EVENING FROM 215 PM UNTIL
800 PM CST.

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 145 STATUTE MILES EAST AND WEST
OF A LINE FROM 50 MILES EAST OF PALACIOS TEXAS TO 25 MILES WEST
NORTHWEST OF LUFKIN TEXAS.

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.


DISCUSSION...THUNDERSTORMS ARE INCREASING IN UNSTABLE AIR MASS
WHERE DAYTIME HEATING AND STEEPENING LAPSE RATES ARE CONTRIBUTING
TO SURFACE-BASED CAPES ABOVE 2000 J/KG. WIND PROFILES ARE FORECAST
TO BECOME INCREASINGLY FAVORABLE FOR SUPERCELLS ESPECIALLY ALONG
RESIDUAL COASTAL BOUNDARY. MAIN THREAT SHOULD BE HAIL ALTHOUGH AN
ISOLATED TORNADO OR TWO WILL BE POSSIBLE. 


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 500. 
MEAN STORM MOTION VECTOR 22025.


...VESCIO

284,0974 312,0973 312,0924 284,0930

Tornado Watches in Texas, 1998Tornado Watches in Louisiana, 1998Every tornado watch in 1998

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.