HPC Discussion
Posted by
JAC on 11/20/2009, 6:38 am
SHORT RANGE FORECAST DISCUSSION NWS HYDROMETEOROLOGICAL PREDICTION CENTER CAMP SPRINGS MD 359 AM EST FRI NOV 20 2009 VALID 12Z FRI NOV 20 2009 - 00Z SUN NOV 22 2009 A SOUTHERN STREAM DISTURBANCE PUSHING EASTWARD UNDER THE BIG BEND OF TEXAS IS EXPECTED TO BE A HEAVY RAINFALL PRODUCER ACROSS THE WESTERN GULF COAST THROUGH SATURDAY MORNING BEFORE SLOWLY EDGING EASTWARD INTO THE CENTRAL GULF COAST BY THAT EVENING. A STRONG SOUTH-SOUTHEASTERLY FLOW FROM THE GULF OF MEXICO IS DRAWING AN ANOMALOUSLY LARGE AMOUNT OF MOISTURE INTO THE WESTERN GULF COAST STATES. AS THE ASSOCIATED SURFACE BOUNDARY INTERCEPTS THIS PLUME OF MOISTURE...FURTHER ENHANCEMENT IN THE SHOWER AND THUNDERSTORM ACTIVITY IS TO BE EXPECTED. THE SEVERE POTENTIAL IS FORECAST TO BE MINIMAL WITH THIS WEATHER SYSTEM...BUT FLOODING IS A DEFINITE CONCERN GIVEN THE LARGE AMOUNTS OF RAIN EXPECTED IN A SHORT TIME SPAN. IN PARTICULAR...THE HPC EXCESSIVE RAINFALL FORECAST HAS OUTLINED THE HIGHEST RISK FOR FLOODING ACROSS COASTAL SOUTHEAST TEXAS THROUGH SATURDAY MORNING. ONCE THIS ENTIRE WEATHER SYSTEM MOVES EASTWARD INTO THE CENTRAL GULF COAST...A DRIER AIR MASS WILL SETTLED IN ACROSS THE STATE OF TEXAS WITH NOT MUCH CHANGE IN TEMPERATURES THIS WEEKEND.
|
42
In this thread:
Possible Nor'easter & Negative-Tilted Shortwave Combo early next week -
JAC,
11/19/2009, 7:11 am- NAM backs off Shortwave --> no combo - JAC, 11/20/2009, 7:01 am
- Re: Possible Nor'easter & Negative-Tilted Shortwave Combo early next week - aquaRN, 11/20/2009, 6:49 am
- Hmmmm - JAC, 11/19/2009, 4:04 pm
- CMC & GFS - JAC, 11/20/2009, 6:46 am
- Re: Hmmmm - chucky7777, 11/20/2009, 12:59 am
- HPC Discussion - JAC, 11/20/2009, 6:38 am
- SPC Discussion - JAC, 11/20/2009, 6:25 am
- Re: Hmmmm - BobbiStorm, 11/19/2009, 4:41 pm
Post A Reply
This thread has been archived and can no longer receive replies.