Severe Thunderstorm Warning 28, NWS Las Vegas, NV

MOJAVE DESERT/SOUTHERN GREAT BASIN AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE LAS VEGAS NV...CORRECTION TO SYNOPSIS
240 PM PDT SAT AUG 29 1998

SYNOPSIS...LOW LEVEL MOISTURE WILL LINGER ACROSS THE SOUTHERN GREAT
BASIN AND MOJAVE DESERT INTO THE MIDDLE OF NEXT WEEK. THE STRONG AREA
OF HIGH PRESSURE OVER THE AREA WILL WEAKEN OVER THE NEXT SEVERAL
DAYS. THIS WILL PROVIDE THE REGION WITH A BETTER ENVIRONMENT FOR THE
DEVELOPMENT OF AFTERNOON AND EVENING THUNDERSTORMS.

DISCUSSION...OFF VISIBLE IMAGERY APPEARS HIGH CENTERED VICINITY TIP
OF SOUTHERN NEVADA. DEVELOPMENT OCCURRING AROUND PERIPHERY OF HIGH
CENTER THIS AFTERNOON WITH DEEPEST CONVECTION ALONG HIGHER TERRAIN OF
CENTRAL ARIZONA. MUCH SHALLOWER CONVECTION OCCURRING ACROSS EASTERN
CALIFORNIA AND SOUTHERN NEVADA. FLOW OVER CENTRAL ARIZONA NORTH OR
NORTHEAST SO PROPAGATION OF STORMS FROM CENTRAL ARIZONA SOUTHWEST
INTO SOUTHERN MOHAVE COUNTY AND COLORADO RIVER POSSIBLE WHERE
MOIST/HOT AIR MASS IS IN PLACE. BELIEVE PERSISTENCE BEST ROUTE NEXT
TWO DAYS. AFTER SUBSTANTIAL LOW LEVEL MOISTURE INCREASE EARLIER TODAY
SEE NO MECHANISM THAT WILL ALLOW FOR EITHER DRYING OR ANY FURTHER
MOISTENING. BIGGEST CHANGES ARE SET TO OCCUR ALOFT. NGM/AVN SIMILAR
THROUGH 48 HOURS IN DEVELOPING TWO DISTINCT HIGH CENTERS...ONE OFF
THE WEST COAST NEAR 130W AND THE OTHER CENTER OVER NORTH CENTRAL
ARIZONA. THEN MONDAY...SHORT WAVE TROUGH CURRENTLY NEAR 40N/130W
GETS SANDWICHED BETWEEN THE TWO HIGH CENTERS OVER THE GREAT BASIN. A
COUPLE DEGREES OF COOLING ALOFT SHOULD BE ENUF TO BREAK CAP SUNDAY
AND ADDITIONAL COOLING MONDAY WILL STEEPEN LAPSE RATES FURTHER.
PERSISTENCE CARRIES OVER INTO THE EXTENDED WITH LITTLE CHANGE IN
SYNOPTIC PATTERN. LAS 0222. PIERCE