Last Updated: 442 AM Tuesday, November 24 2009
.AVIATION /10Z TUESDAY THROUGH SATURDAY/...
SIGNIFICANT FLIGHT RESTRICTIONS WILL CONTINUE AT ALL BLACKSBURG
TERMINAL FORECAST POINTS FOR THE REST OF TONIGHT...AND WILL LIKELY
PERSIST INTO WEDNESDAY MORNING AS A PERSISTENT MOIST AND COOL
WEDGE OF AIR REMAINS TRAPPED UNDER STATIONARY SURFACE RIDGE OVER
AREA.
00Z RNK SOUNDING SHOWED THE AIRMASS SATURATED FROM THE SURFACE TO
700 MB BUT THIS MOISTURE IS EXPECTED TO BECOME SHALLOWER BY
MORNING. MODELS STILL DIFFER ON HOW MUCH THE CLOUDS MAY CLEAR OUT
WEST OF THE APPALACHIANS. SLIGHT DOWNSLOPING MAY ALLOW KBLF/KLWB
TO IMPROVE TO BKN MVFR CEILINGS WITH VFR VISIBILITIES AFTER 18Z...BUT
MOST OTHER AREAS...ESPECIALLY EAST OF THE BLUE RIDGE...WILL REMAIN
FIRMLY UNDER INFLUENCE OF THE WEDGE WITH CEILINGS REMAINING IN
THE IFR RANGE AND VISIBILITIES NOT IMPROVING MUCH ABOVE MVFR
LEVELS.
GRADUAL DETERIORATION OF CEILINGS AND VISIBILITY BACK TO WIDESPREAD
IFR TO LIFR EXPECTED ONCE AGAIN ON TUESDAY NIGHT...PERSISTING INTO
WEDNESDAY MORNING BEFORE SOUTHWEST WINDS IN ADVANCE OF A WEAK COLD
FRONT HELP ERODE WEDGE AND ALLOW FOR SLOW BUT GRADUAL IMPROVEMENT
BACK TO VFR WEATHER IN MOST LOCATIONS ON WEDNESDAY AFTERNOON.
ARRIVAL OF ANOTHER...STRONGER COLD FRONT THURSDAY AND THURSDAY
NIGHT WILL LIKELY BRING A RETURN TO MVFR TO IFR CONDITIONS IN UPSLOPE
AREAS WEST OF THE BLUE RIDGE ALONG WITH AN INCREASING THREAT OF
MOUNTAIN RAIN OR SNOW SHOWERS. DOWNSLOPING CONDITIONS EAST OF THE
BLUE RIDGE SHOULD HELP TO KEEP THOSE AREAS MAINLY IN VFR RANGE
INTO AT LEAST SATURDAY.
Comments about our aviation discussion are welcomed. Please send any comments or questions to our aviation focal point, Ken Kostura. |
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