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Flash Flood Watch

Flood Watch
National Weather Service Baltimore MD/Washington DC
842 PM EDT Mon Aug 3 2020

VAZ025>027-029-036>040-050-051-056-507-508-WVZ055-040845-
/O.CON.KLWX.FF.A.0017.000000T0000Z-200805T0000Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Augusta-Rockingham-Shenandoah-Page-Nelson-Albemarle-Greene-
Madison-Rappahannock-Orange-Culpeper-Spotsylvania-
Northern Virginia Blue Ridge-Central Virginia Blue Ridge-Hardy-
Including the cities of Staunton, Waynesboro, Stuarts Draft,
Harrisonburg, Strasburg, Woodstock, Mount Jackson, New Market,
Luray, Shenandoah, Stanley, Lovingston, Charlottesville,
Stanardsville, Madison, Washington, Orange, Gordonsville,
Culpeper, Fredericksburg, Big Meadows, Wintergreen,
and Moorefield
842 PM EDT Mon Aug 3 2020

...FLASH FLOOD WATCH REMAINS IN EFFECT THROUGH TUESDAY EVENING...

The Flash Flood Watch continues for

* Portions of Virginia and eastern West Virginia, including the
  following areas, in Virginia, Albemarle, Augusta, Central
  Virginia Blue Ridge, Culpeper, Greene, Madison, Nelson,
  Northern Virginia Blue Ridge, Orange, Page, Rappahannock,
  Rockingham, Shenandoah, and Spotsylvania. In eastern West
  Virginia, Hardy.

* Through Tuesday evening

* Rainfall associated with Tropical Storm Isaias is expected to
  start spreading northward late this afternoon and continue
  through much of the day on Tuesday. Widespread rainfall totals
  of 3 to 6 inches are expected with localized higher amounts
  possible. The highest rainfall totals are expected in the
  Virginia Piedmont.

* This amount of rain is likely to result in significant flash
  flooding of small streams and creeks tonight into Tuesday
  evening.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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.

&&

$$



Hurricane Local Statement

Hurricane Isaias Local Statement Intermediate Advisory Number 27A
DCZ001-MDZ003>006-011-013-014-016>018-503>508-VAZ027>031-036>040-050>057-501-502-505>508-WVZ051>053-040830-

Hurricane Isaias Local Statement Intermediate Advisory Number 27A
National Weather Service Baltimore MD/Washington DC  AL092020
828 PM EDT Mon Aug 3 2020

This product covers Eastern West Virginia, Central and Western Maryland, Northern and Northwestern
Virginia, and District of Columbia

**STRONG WINDS AND FLOODING RAINFALL LIKELY TONIGHT AND TUESDAY**

NEW INFORMATION
---------------

* CHANGES TO WATCHES AND WARNINGS:
    - None

* CURRENT WATCHES AND WARNINGS:
    - A Tropical Storm Warning is in effect for Anne Arundel,
      Arlington/Falls Church/Alexandria, Calvert, Carroll, Central
      and Southeast Howard, Central and Southeast Montgomery,
      Charles, District of Columbia, Fairfax, King George, Northern
      Baltimore, Northwest Harford, Northwest Howard, Northwest
      Montgomery, Prince Georges, Prince William/Manassas/Manassas
      Park, Southeast Harford, Southern Baltimore, Spotsylvania, St.
      Marys, and Stafford

* STORM INFORMATION:
    - About 440 miles south-southwest of Washington DC or about 470
      miles south-southwest of Baltimore MD
    - 32.8N 79.0W
    - Storm Intensity 75 mph
    - Movement North-northeast or 15 degrees at 16 mph

SITUATION OVERVIEW
------------------

Hurricane Isaias will approach from the Carolinas tonight and move
across the Chesapeake Bay region Tuesday morning. The center of the
storm will rapidly exit to the northeast Tuesday afternoon.

Significant flash flooding of small streams and creeks is likely
tonight into Tuesday evening as rainfall associated with Isaias
spreads northward. Widespread rainfall totals of 3 to 6 inches are
expected with locally higher amounts possible. The highest amounts are
expected east of the Blue Ridge Mountains, and particularly over the
I-95 corridor late tonight through Tuesday.

Tropical storm force winds are expected along and east of the
I-95 Corridor and north central Maryland. Tree damage and power
outages are possible in this area. The strongest winds are expected
across southern Maryland, where tree damage and power outages are more
likely. Moderate coastal flooding is also likely along the western
shores of the Chesapeake Bay and at Washington DC Southwest Waterfront
on Tuesday. Minor coastal flooding is likely along other tidal waters.

POTENTIAL IMPACTS
-----------------

* FLOODING RAIN:
Protect against life-threatening rainfall flooding having possible
extensive impacts near and east of I-95 corridor. Potential
impacts include:
    - Major rainfall flooding may prompt many evacuations and rescues.
    - Rivers and tributaries may rapidly overflow their banks in
      multiple places. Small streams, creeks, canals, arroyos, and
      ditches may become dangerous rivers. In mountain areas,
      destructive runoff may run quickly down valleys while
      increasing susceptibility to rockslides and mudslides. Flood
      control systems and barriers may become stressed.
    - Flood waters can enter many structures within multiple
      communities, some structures becoming uninhabitable or washed
      away. Many places where flood waters may cover escape routes.
      Streets and parking lots become rivers of moving water with
      underpasses submerged. Driving conditions become dangerous.
      Many road and bridge closures with some weakened or washed out.

Prepare for dangerous rainfall flooding having possible limited to
significant impacts across other locations near and east of the Blue
Ridge Mountains.

* WIND:
Protect against dangerous wind having possible significant impacts
across southern Maryland. Potential impacts in this area
include:
    - Some damage to roofing and siding materials, along with damage
      to porches, awnings, carports, and sheds. A few buildings
      experiencing window, door, and garage door failures. Mobile
      homes damaged, especially if unanchored. Unsecured lightweight
      objects become dangerous projectiles.
    - Several large trees snapped or uprooted, but with greater
      numbers in places where trees are shallow rooted. Several
      fences and roadway signs blown over.
    - Some roads impassable from large debris, and more within urban
      or heavily wooded places. A few bridges, causeways, and access
      routes impassable.
    - Scattered power and communications outages, but more prevalent
      in areas with above ground lines.

Also, protect against hazardous wind having possible limited impacts
elsewhere near and east of the Interstate 95 corridor.

* SURGE:
Protect against locally hazardous surge having possible limited
impacts across along the Tidal Potomac River and along the western shore of
the Chesapeake Bay. Potential impacts in this area include:
    - Localized inundation with storm surge flooding mainly along
      immediate shorelines and in low-lying spots, or in areas
      farther inland near where higher surge waters move ashore.
    - Sections of near-shore roads and parking lots become overspread
      with surge water. Driving conditions dangerous in places where
      surge water covers the road.
    - Moderate beach erosion. Heavy surf also breaching dunes, mainly
      in usually vulnerable locations. Strong rip currents.
    - Minor to locally moderate damage to marinas, docks, boardwalks,
      and piers. A few small craft broken away from moorings.

* TORNADOES:
Protect against a tornado event having possible limited impacts
across southern Maryland. Potential impacts include:
    - The occurrence of isolated tornadoes can hinder the execution
      of emergency plans during tropical events.
    - A few places may experience tornado damage, along with power
      and communications disruptions.
    - Locations could realize roofs peeled off buildings, chimneys
      toppled, mobile homes pushed off foundations or overturned,
      large tree tops and branches snapped off, shallow-rooted trees
      knocked over, moving vehicles blown off roads, and small boats
      pulled from moorings.

Elsewhere across Eastern West Virginia, Central and Western Maryland,
Northern and Northwestern Virginia, and District of Columbia, little
to no impact is anticipated.

PRECAUTIONARY/PREPAREDNESS ACTIONS
----------------------------------

PREPAREDNESS INFORMATION:
Now is the time to complete all preparations to protect life and
property in accordance with your emergency plan. Ensure you are in a
safe location before the onset of strong winds or possible flooding.

Failure to adequately shelter may result in serious injury or loss of
life. Always heed the advice of local officials and comply with any
orders that are issued. Remember, during the storm 9 1 1 Emergency
Services may not be able to immediately respond if conditions are
unsafe. This should be a big factor in your decision making.

Keep cell phones well charged. Cell phone chargers for automobiles
can be helpful, but be aware of your risk for deadly carbon monoxide
poisoning if your car is left idling in a garage or other poorly
ventilated area.

Rapidly rising flood waters are deadly. If you are in a flood-prone
area, consider moving to higher ground. Never drive through a flooded
roadway. Remember, turn around don`t drown!

If a Tornado Warning is issued for your area, be ready to shelter
quickly, preferably away from windows and in an interior room not
prone to flooding. If driving, scan the roadside for quick shelter
options.

Closely monitor weather.gov, NOAA Weather radio or local news outlets
for official storm information. Be ready to adapt to possible changes
to the forecast. Ensure you have multiple ways to receive weather
warnings.

* ADDITIONAL SOURCES OF INFORMATION:
- For information on appropriate preparations see ready.gov
- For information on creating an emergency plan see getagameplan.org
- For additional disaster preparedness information see redcross.org

NEXT UPDATE
-----------

The next local statement will be issued by the National Weather
Service in Baltimore MD/Washington DC around 1130 PM EDT, or sooner
if conditions warrant.

$$



Hazardous Weather Outlook

Hazardous Weather Outlook
National Weather Service Baltimore MD/Washington DC
200 PM EDT Mon Aug 3 2020

MDZ003>006-501>507-VAZ025>031-036>040-050-051-501>508-WVZ050>053-
055-501>506-041000-
Washington-Frederick MD-Carroll-Northern Baltimore-
Extreme Western Allegany-Central and Eastern Allegany-
Northwest Montgomery-Central and Southeast Montgomery-
Northwest Howard-Central and Southeast Howard-Northwest Harford-
Augusta-Rockingham-Shenandoah-Frederick VA-Page-Warren-Clarke-
Nelson-Albemarle-Greene-Madison-Rappahannock-Orange-Culpeper-
Northern Fauquier-Southern Fauquier-Western Highland-
Eastern Highland-Western Loudoun-Eastern Loudoun-
Northern Virginia Blue Ridge-Central Virginia Blue Ridge-
Hampshire-Morgan-Berkeley-Jefferson-Hardy-Western Grant-
Eastern Grant-Western Mineral-Eastern Mineral-Western Pendleton-
Eastern Pendleton-
200 PM EDT Mon Aug 3 2020

This Hazardous Weather Outlook is for eastern West Virginia,
northern and central Virginia, and central and western Maryland
with the exception of Garrett County.

.DAY ONE...This Afternoon and Tonight

Showers are expected with scattered thunderstorms today through
tonight with locally damaging wind gusts being the primary
threat. The most widespread activity is this afternoon and evening.

A Tropical Storm Warning is in effect for portions of central
Maryland as Tropical Storm Isaias approaches the area.

A Flash Flood Watch is in effect for most of the outlook area
later tonight as Tropical Storm Isaias approaches the area.
Refer to the Flash Flood message for more details.

.DAYS TWO THROUGH SEVEN...Tuesday through Sunday

A Tropical Storm Watch is in effect for portions of central
Maryland Tuesday as Tropical Storm Isaias moves over the area.

A Flash Flood Watch is in effect for most of the outlook area
Tuesday into Tuesday night. Refer to the Flash Flood message for
more details.

.SPOTTER INFORMATION STATEMENT...

Please report any instances of flooding or wind damage to the
National Weather Service.

$$



U.S. Dept. of Commerce
NOAA National Weather Service
1325 East West Highway
Silver Spring, MD 20910
E-mail: w-nws.webmaster@noaa.gov
Page last modified: May 16, 2007
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