Severe Thunderstorm Watch 87

Issued

Apr 12, 2002, 6:45 PM MDT (00:45 UTC)

Expired

Apr 13, 2002, 1:00 AM MDT

In force

6 hr

Issued by

the Storm Prediction Center

The Amarillo radar (KAMA), 99 km from the middle of the area, began a volume at 00:47 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 
WWUS20 KWNS 130038
SEL7  
SPC WW 130028
NMZ000-OKZ000-TXZ000-130700-

URGENT - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WATCH NUMBER 87
STORM PREDICTION CENTER NORMAN OK
728 PM CDT FRI APR 12 2002

THE STORM PREDICTION CENTER HAS ISSUED A
SEVERE THUNDERSTORM WATCH FOR PORTIONS OF

   NORTHEAST NEW MEXICO                         
   THE OKLAHOMA PANHANDLE                           
   THE TEXAS PANHANDLE                               

EFFECTIVE THIS FRIDAY NIGHT AND SATURDAY MORNING FROM 745 PM UNTIL
200 AM CDT.

HAIL TO 2 INCHES IN DIAMETER...THUNDERSTORM WIND GUSTS TO 70
MPH...AND DANGEROUS LIGHTNING ARE POSSIBLE IN THESE AREAS.

THE SEVERE THUNDERSTORM WATCH AREA IS ALONG AND 130 STATUTE MILES
EAST AND WEST OF A LINE FROM 55 MILES NORTHEAST OF CLAYTON NEW
MEXICO TO 45 MILES SOUTHWEST OF AMARILLO TEXAS.

REMEMBER...A SEVERE THUNDERSTORM WATCH MEANS CONDITIONS ARE
FAVORABLE FOR 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.  SEVERE THUNDERSTORMS CAN AND OCCASIONALLY DO PRODUCE
TORNADOES.

DISCUSSION...THUNDERSTORMS/SUPERCELLS EXPECTED TO INCREASE IN
COVERAGE/INTENSITY ACROSS WW REGION THIS EVENING AS ESELY LOW LEVEL
FLOW STRENGTHENS BENEATH 40-45 KT WNW MID LEVEL JET.  BOUNDARY
LAYER MOISTURE AVAILABILITY SOMEWHAT LIMITED ATTM...BUT WILL
INCREASE WITH TIME...WITH SURFACE DEWPOINTS IN THE MID TO UPPER 50S
EXPECTED IN THE CNTRL PART OF THE TX PNHDL BY MID EVENING.

GIVEN LOW LEVEL ELY COMPONENT TO FLOW...SOME THREAT MAY DEVELOP FOR
TORNADOES.  THIS THREAT WOULD BE GREATEST LATER THIS EVENING IN
SERN HALF OF WW IF STORMS ARE ABLE TO REMAIN DISCRETE.  THUS...
PARTS OF WW MAY REQUIRE UPGRADE TO TORNADO WATCH LATER TONIGHT. 

AVIATION...A FEW SEVERE THUNDERSTORMS WITH HAIL SURFACE AND ALOFT
TO 2 INCHES.  EXTREME TURBULENCE AND SURFACE WIND GUSTS TO 60
KNOTS.  A FEW CUMULONIMBI WITH MAXIMUM TOPS TO 450.  MEAN STORM
MOTION VECTOR 29035.

...CORFIDI

344,1043 365,1044 365,1000 344,0995

WWUS20 KWNS 130038
SEL7  
SPC WW 130028
NMZ000-OKZ000-TXZ000-130700-

URGENT - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WATCH NUMBER 87
STORM PREDICTION CENTER NORMAN OK
728 PM CDT FRI APR 12 2002

THE STORM PREDICTION CENTER HAS ISSUED A
SEVERE THUNDERSTORM WATCH FOR PORTIONS OF

   NORTHEAST NEW MEXICO                         
   THE OKLAHOMA PANHANDLE                           
   THE TEXAS PANHANDLE                               

EFFECTIVE THIS FRIDAY NIGHT AND SATURDAY MORNING FROM 745 PM UNTIL
200 AM CDT.

HAIL TO 2 INCHES IN DIAMETER...THUNDERSTORM WIND GUSTS TO 70
MPH...AND DANGEROUS LIGHTNING ARE POSSIBLE IN THESE AREAS.

THE SEVERE THUNDERSTORM WATCH AREA IS ALONG AND 130 STATUTE MILES
EAST AND WEST OF A LINE FROM 55 MILES NORTHEAST OF CLAYTON NEW
MEXICO TO 45 MILES SOUTHWEST OF AMARILLO TEXAS.

REMEMBER...A SEVERE THUNDERSTORM WATCH MEANS CONDITIONS ARE
FAVORABLE FOR 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.  SEVERE THUNDERSTORMS CAN AND OCCASIONALLY DO PRODUCE
TORNADOES.

DISCUSSION...THUNDERSTORMS/SUPERCELLS EXPECTED TO INCREASE IN
COVERAGE/INTENSITY ACROSS WW REGION THIS EVENING AS ESELY LOW LEVEL
FLOW STRENGTHENS BENEATH 40-45 KT WNW MID LEVEL JET.  BOUNDARY
LAYER MOISTURE AVAILABILITY SOMEWHAT LIMITED ATTM...BUT WILL
INCREASE WITH TIME...WITH SURFACE DEWPOINTS IN THE MID TO UPPER 50S
EXPECTED IN THE CNTRL PART OF THE TX PNHDL BY MID EVENING.

GIVEN LOW LEVEL ELY COMPONENT TO FLOW...SOME THREAT MAY DEVELOP FOR
TORNADOES.  THIS THREAT WOULD BE GREATEST LATER THIS EVENING IN
SERN HALF OF WW IF STORMS ARE ABLE TO REMAIN DISCRETE.  THUS...
PARTS OF WW MAY REQUIRE UPGRADE TO TORNADO WATCH LATER TONIGHT. 

AVIATION...A FEW SEVERE THUNDERSTORMS WITH HAIL SURFACE AND ALOFT
TO 2 INCHES.  EXTREME TURBULENCE AND SURFACE WIND GUSTS TO 60
KNOTS.  A FEW CUMULONIMBI WITH MAXIMUM TOPS TO 450.  MEAN STORM
MOTION VECTOR 29035.

...CORFIDI

344,1043 365,1044 365,1000 344,0995

Severe Thunderstorm Watches in Texas, 2002Severe Thunderstorm Watches in New Mexico, 2002Severe Thunderstorm Watches in Oklahoma, 2002Every severe thunderstorm watch in 2002

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.