#19 Postby jasons2k » Wed Aug 10, 2005 3:43 pm
Interesting, cap must be pretty strong, we'll see though...
AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE HOUSTON/GALVESTON TX
300 PM CDT WED AUG 10 2005
.DISCUSSION...
UPPER LOW ACROSS CENTRAL TEXAS IS EXPECTED TO GRADUALLY WEAKEN AND DISSIPATE AND SHOULD NO LONGER BE A FACTOR IN OUR WEATHER AFTER
TONIGHT. CONVECTION ONGOING ACROSS OUR NORTHERN ZONES THIS AFTERNOON
WHERE DEEPER MOISTURE IS PRESENT (PWS AROUND 2.1 INCHES). TSRA HAVE HAD A DIFFICULT TIME DEVELOPING FURTHER SOUTH DUE TO THE DRIER AIRMASS (PWS AROUND 1.4 INCHES) AND WEAK CAPPING IN PLACE OVER THE COASTAL ZONES. WILL GO 50 POPS NORTH...30S CENTRAL...AND ONLY 10S FOR THE COAST THIS EVENING. WILL LOWER NW ZONES TO 30 POPS AFTER 06Z...WITH 20S OR LESS EVERYWHERE ELSE. THREAT OF LOCALLY HEAVY RAIN WILL CONTINUE FOR A FEW MORE HOURS NORTHERN ZONES AND WILL COVER THIS IN
AN UPDATED HAZARDOUS WEATHER OUTLOOK.
GENERALLY FOLLOWED ETA SOLUTION IN THE SHORT-TERM PERIODS AS THE GFS HAS BEEN TOO DRY FOR OUR AREA THE LAST FEW RUNS. STEADY DRYING IS EXPECTED OVER THE NEXT FEW DAYS. PWS DROP TO AROUND 1.6-1.7 INCHES AREAWIDE BY FRI/SAT WITH K-INDICES FALLING INTO THE LOWER/MID 20S. CAPPING WILL REMAIN WEAK ENOUGH TO SUPPORT ISOLATED DIURNAL
CONVECTION AND WILL MAINTAIN MENTION OF TSRA IN FORECAST THROUGH SATURDAY. TEMPS WILL BE WARMER THIS PERIOD WITH A FEW INLAND SPOTS LIKELY REACHING THE UPPER 90S BY FRI/SAT...TYPICAL FOR MID-AUGUST.
NEXT CHANGE IN THE WEATHER PATTERN TAKES PLACE BEGINNING SUNDAY. THE LAST SEVERAL RUNS OF THE GFS HAVE BEEN IN GOOD AGREEMENT ON AN AREA OF DEEP TROPICAL MOISTURE (PWS GREATER THAN 2 INCHES) BEING DRAWN NORTHWESTWARD FROM THE WESTERN CARIBBEAN INTO SE TX AROUND THE WESTERN PERIPHERY OF THE LARGE SUBTROPICAL RIDGE. THE GFS SOLUTION HAS SOME
SUPPORT FROM THE CANADIAN MODEL...WHILE THE ECMWF SHOWS MORE RIDGING OVER THE AREA. WILL CONTINUE THE TREND OF INCREASING POPS TO CHANCE CATEGORY BEGINNING SUNDAY...BUT STAYING WELL BELOW THE HIGH MEXMOS POPS GIVEN THE LACK OF AN OBVIOUS LIFTING MECHANISM OR LOW LEVEL FOCUS
RIGHT NOW.
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