Flash Flood Watch
Statement as of 8:52 am EDT on September 5, 2008


... Flash Flood Watch remains in effect from Saturday morning
through Saturday afternoon...

The Flash Flood Watch continues for

* portions of Maryland... the District of Columbia and Virginia...
including the following areas... in Maryland... Anne Arundel...
Calvert... Carroll... Charles... Frederick MD... Harford...
Howard... Montgomery... northern Baltimore... Prince Georges...
southern Baltimore and St. Marys. The District of Columbia. In
Virginia... Arlington/Falls Church/Alexandria... Culpeper...
Fairfax... Fauquier... King George... Loudoun... Orange... Prince
William/Manassas/Manassas Park... Spotsylvania and Stafford.

* From Saturday morning through Saturday afternoon

* heavy rain associated with Tropical Storm Hanna will move
northwest across the region Friday evening into Saturday. It
appears at this time that the heaviest rains would fall late
Friday night into late Saturday afternoon. This is largely
dependent on the exact track of Hanna. However... along the path
of this storm totals of 4 to 7 inches with localized higher
amounts up to 10 inches. Latest flash flood guidance indicates
that amounts of 3 to 4 inches in 3 hours or less will cause
small streams and creeks to flow out of their banks.

* If heavy rain develops... expect small streams to overflow and
low lying roads to flood. Do not ever drive into flood waters.

A Flash Flood Watch means that conditions may develop that lead
to flash flooding. Flash flooding is a very dangerous situation.

You should monitor later forecasts and be prepared to take action
should flash flood warnings be issued.

Rosa




Tropical Storm Warning
Statement as of 2:30 PM EDT on September 5, 2008


... Tropical Storm Warning remains in effect...

... New information...

The position of Tropical Storm Hanna was updated.

... Areas affected...

This statement recommends actions to be taken by persons in...
central Maryland... northern Maryland... southern Maryland... the
District of Columbia... central Virginia and northern Virginia.

... Watches/warnings...

Please listen to NOAA Weather Radio or go to weather.Gov on the
internet for more information about these additional hazards.

Flash Flood Watch.

... Precautionary/preparedness actions...

Preparations to protect life and property should be rushed to
completion. Listen to NOAA Weather Radio. Bring inside any outdoor
objects that can be picked up by the wind.

... Storm surge and storm tide...

Coastal storm surge of 1 to 3 feet above normal tide levels can
be expected along the western shore of the Chesapeake Bay and the
tidal Potomac River. The highest water levels are expected during
the high tidal cycle occurring late Saturday morning and
afternoon.

Areas that will be prone to coastal flooding on Saturday will be
Edgewater in Anne Arundel County... Broomes Island and Benedict in
Calvert County... areas along the Port Tobacco river in Charles
County... and areas along the Wicomico river... Chaptico... Coltons
Point... Breton Bay... St. Clements Bay... St. George Island... and
areas along the St. Marys River in St. Marys County.

Here are the times of high tides on Saturday for locations from
north to south along the Chesapeake Bay...

Havre de Grace... 2:44 PM
Bowley Bar... 12:22 PM
Fort McHenry... 11:31 am
Fells Point... 11:40 am
Annapolis... 10:01 am
Chesapeake Beach... 8:44 am
Broomes Island... 7:18 am
Solomons Island... 6:53 am
Point Lookout... 6:03 am

And along the tidal Potomac River...

Washington Channel... 1:34 PM
Reagan National Airport... 1:50 PM
Alexandria... 1:52 PM
Quantico... 12:42 PM
Port Tobacco river... 9:26 am
Dahlgren... 8:34 am
Coltons Point... 8:16 am
Colonial Beach... 8:07 am
Piney Point... 7:40 am

... Winds...

Sustained winds of 30 to 40 mph with gusts up to 50 mph are
possible beginning early Saturday morning and lasting into the
evening. The strongest winds will occur east of the Interstate 95
corridor... with southern Maryland having the highest likelihood of
strongest winds. Winds of this magnitude may cause trees and power
lines to fall and cause scattered power outages.

... Probability of hurricane/tropical storm conditions...

For Baltimore MD...

There is a 25 percent chance of winds 39 mph or greater.

For Annapolis MD...

There is a 30 percent chance of winds 39 mph or greater.

For Washington DC...

There a 25 percent chance of winds 39 mph or greater.

... Inland flooding...

Rain will begin across southern Maryland this evening. The
heaviest rainfall is expected Saturday morning and afternoon.
Rainfall totals of 4 to 8 inches are possible. In areas that
experience heavy rain bands up to 10 inches of rain may occur.

Tropical storms are capable of producing very heavy rainfall in a
short amount of time. While it has been dry during the past month
it will be possible for smaller creeks and streams in the region
to rise above bankfull very quickly... creating a flash flood and a
potentially life threatening situation. If you see flash flooding
occurring... report this to law enforcement immediately. Motorists
should be alert for flooding on roadways on Saturday.

... Tornadoes...

There is a risk of isolated tornadoes along and east of the
Interstate 95 corridor Saturday. Tornadoes associated with
tropical systems most often occur in thunderstorms embedded in
rain bands well away from the center and are not accompanied by
hail or a lot of lightning.

... Next update...

This statement will be updated by 600 PM.




Forecast as of 11:40 am EDT on September 5, 2008

Tropical Storm Warning in effect...
This Afternoon
Partly sunny with a slight chance of showers and thunderstorms. Highs in the upper 80s. Southeast winds around 10 mph. Chance of rain 20 percent.
Tonight
Showers with a slight chance of thunderstorms. Lows in the lower 70s. East winds 10 to 15 mph. Chance of rain near 100 percent.
Saturday
Rain and scattered thunderstorms. Rain may be heavy at times. Strong winds with highs in the mid 70s. East winds 40 to 50 mph. Chance of rain near 100 percent.
Saturday Night
Mostly cloudy. Showers in the evening...then a chance of showers after midnight. Windy with lows in the upper 60s. Northwest winds 20 to 30 mph...diminishing to 10 to 15 mph after midnight. Chance of rain 90 percent.
Sunday
Mostly cloudy. Highs in the mid 80s. Northwest winds 5 to 10 mph.
Sunday Night
Partly cloudy. Lows in the lower 60s.
Monday
Sunny. Highs in the lower 80s.
Monday Night
Partly cloudy. Lows in the mid 60s.
Tuesday
Partly sunny with a chance of showers and thunderstorms. Highs in the lower 80s. Chance of rain 30 percent.
Tuesday Night
Mostly cloudy. Lows in the lower 60s.
Wednesday
Partly sunny. Highs in the upper 70s.
Wednesday Night
Partly cloudy. Lows in the lower 60s.
Thursday
Mostly sunny with a 30 percent chance of showers. Highs in the upper 70s.
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