Weather

032 
fxus61 kgyx 070638 
afdgyx 


Area forecast discussion 
National Weather Service Gray ME 
238 am EDT sun Sep 7 2008 


Synopsis... 
remains of Hanna will rapidly exit through the Gulf of Maine this 
morning. High pressure will build over the middle Atlantic region 
this afternoon through Monday night. A strong cold front will 
approach from the west on Tuesday. High pressure will then build 
over the region from the Great Lakes for the end of the work week. 


&& 


Near term /through today/... 
back edge of heavy precipitation currently over southern New Hampshire 
will continue to move northeastward this morning. Expect precipitation 
to end over southernmost forecast area before sunrise and over eastern 
portions of forecast area after sunrise. 


&& 


Short term /tonight/... 
clearing will continue through the day with downsloping over southern 
sections under influence of stiff northwesterly winds. Winds will 
abate during the afternoon as wears on. Mostly clear over southern/coastal 
sections tonight...though still some lingering clouds over northern/mountain 
sections. Used blend of mav/met/current forecast for temperatures/winds 
and blend of mav/current forecast for probability of precipitation. 


&& 


Long term /Monday through Saturday/... 
will keep this brief due to ongoing flooding and rainfall now 
approaching the 6-7 inch range across portions of SW Maine and southeast 
New Hampshire. Localized significant flooding will result. 


Otherwise...high pressure to keep US dry until strong cold front 
approaches Tuesday. Strong dynamics and accompanying very strong 
wind field will support possible localized severe thunderstorms by 
late in the day Tuesday. Front moves off the coast later in the 
evening allowing high pressure to dry US out from the Great Lakes 
region. 


&& 


Aviation /06z Sunday through Thursday/... 
short range...becoming VFR over southern sections by sunrise and over 
eastern portions after sunrise. VFR tonight. 


Long range...mainly VFR except for localized IFR/LIFR in any 
strong to severe thunderstorms Tuesday afternoon and early evening. 


&& 


Marine... 
short range...winds becoming north to northwest as Hanna lifts out. 
Looking for gusts up to 45 kts on back side of storm...so glw 
continued through this morning. Will most likely be able to back 
off to sca's later today...then below sca's tonight. 


Long range...gradient increases rapidly ahead of strong cold front 
on Tuesday. This will allow winds and seas to respond and build 
during the day. Wna ran pretty high with event...and this looks 
reasonable given synoptic situation. Otherwise...winds/seas 
relatively light through much of the period. 


&& 


Hydrology... 
so far...heaviest precipitation has been over southeastern New 
Hampshire as well as coastal and adjacent interior sections of Maine 
with amounts over 4 inches as of 2 am and still counting. Will 
drop Flash Flood Watch with this package as County warnings 
already hoisted for urban areas and small streams. Those warnings 
are currently in place until the 5 to 6 am time frame may need to 
be extended...but we'll make that decision before over next couple 
of hours...based on additional quantitative precipitation forecast. Haven't heard of any significant 
problems as of this time...but that's subject to change especially 
after daybreak. 




Gyx watches/warnings/advisories... 
ME...none. 
New Hampshire...none. 
Marine...Gale Warning until noon EDT today for anz150>154. 


&& 


$$