Tornado Watch 877

Issued

Oct 30, 1998, 3:45 PM MST (22:45 UTC)

Expired

Oct 30, 1998, 10:00 PM MST

In force

6 hr

Issued by

the Storm Prediction Center

The Lubbock radar (KLBB), 138 km from the middle of the area, began a volume at 22:45 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.

000 
WWUS9 KMKC 302222
MKC WW 302222
NMZ000-TXZ000-310500-

URGENT - IMMEDIATE BROADCAST REQUESTED
TORNADO WATCH NUMBER 877
STORM PREDICTION CENTER NORMAN OK
322 PM MST FRI OCT 30 1998

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

   EASTERN NEW MEXICO                         
   WESTERN TEXAS                              

EFFECTIVE THIS FRIDAY AFTERNOON AND EVENING FROM 345 PM UNTIL 1000
PM MST.

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 100 STATUTE MILES EAST AND WEST
OF A LINE FROM 35 MILES WEST NORTHWEST OF CANNON AFB CLOVIS NEW
MEXICO TO FORT STOCKTON 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.

OTHER WATCH INFORMATION...THIS TORNADO WATCH REPLACES SEVERE
THUNDERSTORM WATCH NUMBER 876.  WATCH NUMBER 876 WILL NOT BE IN
EFFECT AFTER 345 PM MST.

DISCUSSION...SEVERAL SUPERCELLS HAVE DEVELOPED IN AREA OF  SELY LOW
LEVEL FLOW IN SOUTHERN HI PLAINS.  INCREASING LOW LEVEL FLOW DURING
THE NEXT FEW HOURS LIKELY TO INCREASE LOW LEVEL SHEAR AND STORM
RELATIVE HELICITY IN REGION.  THIS WILL INCREASE THE PROBABILITY OF
TORNADO DEVELOPMENT WITH THE SUPERCELLS.

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 450. 
MEAN STORM MOTIjON VECTOR 24035.


...JOHNS

;343,1020 305,1011 305,1043 343,1053;

Tornado Watches in Texas, 1998Tornado Watches in New Mexico, 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.