Day 3
..NORTHWEST PA TO THE MID-ATLANTIC COASTLINE
SCATTERED THUNDERSTORMS (PERHAPS STRONG) WILL BE ONGOING ACROSS PA
AND POINTS SOUTHEAST AT THE START OF THE PERIOD (12Z WEDNESDAY).
THROUGH THE EARLY AFTERNOON HOURS, SHOWERS AND THUNDERSTORMS WILL
GIVE WAY TO AT LEAST MODEST INSOLATION, RESULTING IN BOUNDARY LAYER
DESTABILIZATION. SURFACE HEATING OF A MOIST BOUNDARY LAYER (E.G. LOW
70S F SURFACE DEWPOINTS) WILL RESULT IN 2000-3000 J/KG MLCAPE GIVEN
MID-LEVEL LAPSE RATES APPROACHING 7 C/KM. THE AFOREMENTIONED
MID-LEVEL IMPULSE OVERSPREADING EASTERN LOWER MICHIGAN TO THE
DELMARVA WILL RESULT IN STRONG NORTHWESTERLY FLOW ALOFT AND 35-45
KTS OF EFFECTIVE BULK SHEAR. FURTHERMORE, FORECAST SOUNDINGS ALSO
DEPICT APPRECIABLY LARGE AND CURVED HODOGRAPHS, WITH OVER 200 M2/S2
0-3 KM SRH. SUPERCELLS AND BOWING SEGMENTS WILL BE THE MOST LIKELY
STORM MODE, WITH SEVERE WIND AND HAIL THE MAIN THREATS, THOUGH A
COUPLE OF TORNADOES ARE ALSO POSSIBLE.
www.latimes.com
