Flash Flood Watch 21, NWS Baltimore/Washington

384 
WGUS61 KLWX 132150
FFALWX

Flood Watch
National Weather Service Baltimore MD/Washington DC
550 PM EDT Thu Aug 13 2020

MDZ501-502-VAZ027-WVZ050-055-501>504-140400-
/O.CON.KLWX.FF.A.0021.000000T0000Z-200814T0400Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Extreme Western Allegany-Central and Eastern Allegany-Shenandoah-
Hampshire-Hardy-Western Grant-Eastern Grant-Western Mineral-
Eastern Mineral-
Including the cities of Frostburg, Cumberland, Strasburg, 
Woodstock, Mount Jackson, New Market, Romney, Moorefield, Bayard,
Mount Storm, Petersburg, Elk Garden, Antioch, Keyser, New Creek, 
Ridgeville, Russelldale, Headsville, and Fort Ashby
550 PM EDT Thu Aug 13 2020

...FLASH FLOOD WATCH REMAINS IN EFFECT UNTIL MIDNIGHT EDT
TONIGHT...

The Flash Flood Watch continues for

* Portions of western Maryland, northwest Virginia, and eastern 
  West Virginia, including the following areas, in western 
  Maryland, Central and Eastern Allegany and Extreme Western 
  Allegany. In northwest Virginia, Shenandoah. In eastern West 
  Virginia, Eastern Grant, Eastern Mineral, Hampshire, Hardy, 
  Western Grant, and Western Mineral. 

* Until midnight EDT tonight

* Slow moving thunderstorms capable of producing heavy rainfall 
  may develop today. Heavy rainfall from thunderstorms may lead 
  to flash flooding. 

* Potential impacts include rapid rises of water, flooded roads 
  and flooding of structures in low lying areas near streams. 
  Landslides and washouts are also possible. 

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.

&&

$$

MDZ003>006-011-503>508-VAZ028-030-031-505-506-WVZ051>053-505-506-
140400-
/O.CON.KLWX.FF.A.0020.000000T0000Z-200814T0400Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Washington-Frederick MD-Carroll-Northern Baltimore-
Southern Baltimore-Northwest Montgomery-
Central and Southeast Montgomery-Northwest Howard-
Central and Southeast Howard-Northwest Harford-Southeast Harford-
Frederick VA-Warren-Clarke-Western Loudoun-Eastern Loudoun-Morgan-
Berkeley-Jefferson-Western Pendleton-Eastern Pendleton-
Including the cities of Hagerstown, Frederick, Ballenger Creek, 
Eldersburg, Westminster, Reisterstown, Cockeysville, Baltimore, 
Germantown, Damascus, Bethesda, Rockville, Gaithersburg, 
Silver Spring, Lisbon, Columbia, Ellicott City, Jarrettsville, 
Aberdeen, Winchester, Front Royal, Berryville, Purcellville, 
Leesburg, Ashburn, Sterling, Paw Paw, Martinsburg, Charles Town, 
Shepherdstown, Riverton, Brandywine, Franklin, Oak Flat, Ruddle, 
and Sugar Grove
550 PM EDT Thu Aug 13 2020

...FLASH FLOOD WATCH REMAINS IN EFFECT UNTIL MIDNIGHT EDT
TONIGHT...

The Flash Flood Watch continues for

* Portions of Maryland, Virginia, and West Virginia, including 
  the following areas, in Maryland, Carroll, Central and 
  Southeast Howard, Central and Southeast Montgomery, Frederick, 
  Northern Baltimore, Northwest Harford, Northwest Howard, 
  Northwest Montgomery, Southeast Harford, Southern Baltimore, 
  and Washington. In Virginia, Clarke, Eastern Loudoun, 
  Frederick, Warren, and Western Loudoun. In West Virginia, 
  Berkeley, Eastern Pendleton, Jefferson, Morgan, and Western 
  Pendleton. 

* Until midnight EDT tonight

* Slow moving thunderstorms capable of producing heavy rainfall 
  may develop today. Heavy rainfall from thunderstorms may lead 
  to flash flooding. 

* Potential impacts include rapid rises of water, flooded roads 
  and flooding of structures in low lying areas near streams. 
  Landslides and washouts are also possible. 

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A Flash Flood Watch means that rapid rises of water and flash
flooding are POSSIBLE. Flash flooding is a very dangerous
situation.

Those in low lying areas and near streams should monitor water
levels during heavy rain and be prepared to move to high ground
quickly if flooding is observed, or NWS warnings are issued.

Drivers should be very cautious overnight. Low areas may become
flooded, and heavy rain can cause poor drainage flooding quickly.
If you encounter a flooded road, turn around, don't drown.

&&

$$

DCZ001-MDZ013-014-016>018-VAZ025-026-029-036>040-050>057-501>504-
507-508-140400-
/O.CON.KLWX.FF.A.0020.000000T0000Z-200814T0400Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
District of Columbia-Prince Georges-Anne Arundel-Charles-
St. Marys-Calvert-Augusta-Rockingham-Page-Nelson-Albemarle-Greene-
Madison-Rappahannock-Orange-Culpeper-
Prince William/Manassas/Manassas Park-Fairfax-
Arlington/Falls Church/Alexandria-Stafford-Spotsylvania-
King George-Northern Fauquier-Southern Fauquier-Western Highland-
Eastern Highland-Northern Virginia Blue Ridge-
Central Virginia Blue Ridge-
Including the cities of Washington, Bowie, Suitland-Silver Hill, 
Clinton, College Park, Greenbelt, Laurel, Camp Springs, 
Glen Burnie, Annapolis, Severn, South Gate, Severna Park, Arnold,
Odenton, St. Charles, Waldorf, Lexington Park, California, 
Chesapeake Beach, Huntingtown, Dunkirk, North Beach, Lusby, 
Prince Frederick, Staunton, Waynesboro, Stuarts Draft, 
Harrisonburg, Luray, Shenandoah, Stanley, Lovingston, 
Charlottesville, Stanardsville, Madison, Orange, Gordonsville, 
Culpeper, Dale City, Manassas, Woodbridge, Lake Ridge, Montclair,
Reston, Herndon, Annandale, Centreville, Chantilly, McLean, 
Franconia, Arlington, Alexandria, Falls Church, Falmouth, 
Fredericksburg, Dahlgren, Warrenton, Turnbull, Hightown, 
Monterey, Big Meadows, and Wintergreen
550 PM EDT Thu Aug 13 2020

...FLASH FLOOD WATCH REMAINS IN EFFECT UNTIL MIDNIGHT EDT
TONIGHT...

The Flash Flood Watch continues for

* Portions of Maryland, The District of Columbia, and Virginia, 
  including the following areas, in Maryland, Anne Arundel, 
  Calvert, Charles, Prince Georges, and St. Marys. The District 
  of Columbia. In Virginia, Albemarle, Arlington/Falls 
  Church/Alexandria, Augusta, Central Virginia Blue Ridge, 
  Culpeper, Eastern Highland, Fairfax, Greene, King George, 
  Madison, Nelson, Northern Fauquier, Northern Virginia Blue 
  Ridge, Orange, Page, Prince William, Rappahannock, Rockingham, 
  Southern Fauquier, Spotsylvania, Stafford, and Western 
  Highland. 

* Until midnight EDT tonight

* Slow moving thunderstorms capable of producing heavy rainfall 
  may develop today. Heavy rainfall from thunderstorms may lead 
  to flash flooding. 

* Potential impacts include rapid rises of water, flooded roads 
  and flooding of structures in low lying areas near streams. 
  Landslides and washouts are also possible. 

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.

&&

$$

147 
WGUS61 KLWX 132330
FFALWX

Flood Watch
National Weather Service Baltimore MD/Washington DC
730 PM EDT Thu Aug 13 2020

DCZ001-MDZ003>006-011-013-014-016>018-503>508-VAZ025-026-028>031-
036>040-050>057-501>508-WVZ051>053-505-506-140030-
/O.CAN.KLWX.FF.A.0020.000000T0000Z-200814T0400Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
District of Columbia-Washington-Frederick MD-Carroll-
Northern Baltimore-Southern Baltimore-Prince Georges-Anne Arundel-
Charles-St. Marys-Calvert-Northwest Montgomery-
Central and Southeast Montgomery-Northwest Howard-
Central and Southeast Howard-Northwest Harford-Southeast Harford-
Augusta-Rockingham-Frederick VA-Page-Warren-Clarke-Nelson-
Albemarle-Greene-Madison-Rappahannock-Orange-Culpeper-
Prince William/Manassas/Manassas Park-Fairfax-
Arlington/Falls Church/Alexandria-Stafford-Spotsylvania-
King George-Northern Fauquier-Southern Fauquier-Western Highland-
Eastern Highland-Western Loudoun-Eastern Loudoun-
Northern Virginia Blue Ridge-Central Virginia Blue Ridge-Morgan-
Berkeley-Jefferson-Western Pendleton-Eastern Pendleton-
Including the cities of Washington, Hagerstown, Frederick, 
Ballenger Creek, Eldersburg, Westminster, Reisterstown, 
Cockeysville, Baltimore, Bowie, Suitland-Silver Hill, Clinton, 
College Park, Greenbelt, Laurel, Camp Springs, Glen Burnie, 
Annapolis, Severn, South Gate, Severna Park, Arnold, Odenton, 
St. Charles, Waldorf, Lexington Park, California, 
Chesapeake Beach, Huntingtown, Dunkirk, North Beach, Lusby, 
Prince Frederick, Germantown, Damascus, Bethesda, Rockville, 
Gaithersburg, Silver Spring, Lisbon, Columbia, Ellicott City, 
Jarrettsville, Aberdeen, Staunton, Waynesboro, Stuarts Draft, 
Harrisonburg, Winchester, Luray, Shenandoah, Stanley, 
Front Royal, Berryville, Lovingston, Charlottesville, 
Stanardsville, Madison, Orange, Gordonsville, Culpeper, 
Dale City, Manassas, Woodbridge, Lake Ridge, Montclair, Reston, 
Herndon, Annandale, Centreville, Chantilly, McLean, Franconia, 
Arlington, Alexandria, Falls Church, Falmouth, Fredericksburg, 
Dahlgren, Warrenton, Turnbull, Hightown, Monterey, Purcellville, 
Leesburg, Ashburn, Sterling, Big Meadows, Wintergreen, Paw Paw, 
Martinsburg, Charles Town, Shepherdstown, Riverton, Brandywine, 
Franklin, Oak Flat, Ruddle, and Sugar Grove
730 PM EDT Thu Aug 13 2020

...FLASH FLOOD WATCH IS CANCELLED...

The Flash Flood Watch for portions of Maryland, The District of
Columbia, Virginia, and West Virginia has been cancelled. |

$$

VAZ027-140030-
/O.CAN.KLWX.FF.A.0021.000000T0000Z-200814T0400Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Shenandoah-
Including the cities of Strasburg, Woodstock, Mount Jackson, 
and New Market
730 PM EDT Thu Aug 13 2020

...FLASH FLOOD WATCH IS CANCELLED...

The Flash Flood Watch for a portion of northwest Virginia has
been cancelled. 

$$

MDZ501-502-WVZ050-055-501>504-140400-
/O.CON.KLWX.FF.A.0021.000000T0000Z-200814T0400Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Extreme Western Allegany-Central and Eastern Allegany-Hampshire-
Hardy-Western Grant-Eastern Grant-Western Mineral-Eastern Mineral-
Including the cities of Frostburg, Cumberland, Romney, 
Moorefield, Bayard, Mount Storm, Petersburg, Elk Garden, Antioch,
Keyser, New Creek, Ridgeville, Russelldale, Headsville, 
and Fort Ashby
730 PM EDT Thu Aug 13 2020

...FLASH FLOOD WATCH REMAINS IN EFFECT UNTIL MIDNIGHT EDT
TONIGHT...

The Flash Flood Watch continues for

* Portions of western Maryland and eastern West Virginia, 
  including the following areas, in western Maryland, Central 
  and Eastern Allegany and Extreme Western Allegany. In eastern 
  West Virginia, Eastern Grant, Eastern Mineral, Hampshire, 
  Hardy, Western Grant, and Western Mineral. 

* Until midnight EDT tonight

* Slow moving thunderstorms capable of producing heavy rainfall
  may develop this evening. Heavy rainfall from thunderstorms may
  lead to isolated flash flooding. 

* Potential impacts include rapid rises of water, flooded roads 
  and flooding of structures in low lying areas near streams. 
  Landslides and washouts are also possible. 

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.

&&

$$

309 
WGUS61 KLWX 140045
FFALWX

Flood Watch
National Weather Service Baltimore MD/Washington DC
845 PM EDT Thu Aug 13 2020


MDZ501-502-WVZ050-055-501>504-140145-
/O.CAN.KLWX.FF.A.0021.000000T0000Z-200814T0400Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Extreme Western Allegany-Central and Eastern Allegany-Hampshire-
Hardy-Western Grant-Eastern Grant-Western Mineral-Eastern Mineral-
Including the cities of Frostburg, Cumberland, Romney, 
Moorefield, Bayard, Mount Storm, Petersburg, Elk Garden, Antioch,
Keyser, New Creek, Ridgeville, Russelldale, Headsville, 
and Fort Ashby
845 PM EDT Thu Aug 13 2020

...FLASH FLOOD WATCH IS CANCELLED...

The Flash Flood Watch for portions of western Maryland and
eastern West Virginia has been cancelled. 

$$

Area Forecast Discussion
National Weather Service Baltimore MD/Washington DC
946 PM EDT Wed Aug 12 2020

.SYNOPSIS...
A front will stall over the Middle Atlantic through Thursday, then
drift southward Friday into Saturday. The front will then lift back
northward through the end of the weekend as low pressure lifts into
the Ohio River Valley.

&&

.NEAR TERM /THROUGH THURSDAY/...

The heaviest rain has tapered off for the majority of our
region. A line of thunderstorms have formed over western
Maryland and the eastern Panhandle of WV. The WOFs or Warn on
forecast experimental ensembles were hinting at this solution
all night and this will remain the main concern area over the
next few ours. A new thunderstorm has also formed over central
Virginia in Orange County and if it happens to move over areas
that received a lot of rainfall in our central Virginia counties
, further flood warnings may be needed. Since we have ongoing
storms that may linger through the next few hours we may need
extend the Flash Flood Watch through the overnight periods.

...... Previous discussion........

Showers and thunderstorms are forming within an unstable,
uncapped environment early this afternoon as a weak cold front
drops southward into our area. This front, as well as the bay
breeze and terrain circulations are serving as the main foci
for convective initiation. Flow throughout the column is very
weak, so convection will be rather disorganized/chaotic in
nature, with individual cells not moving much at all before
collapsing on themselves. Movement of storms should largely be
driven by propagation/formation of new cells along cold pool
driven outflow from nearly stationary parent cells.

Precipitable water values have climbed to in excess of 2 inches
along and southeast of I-95. When combined with MLCAPE values
of 2000-3000 J/kg, very heavy rainfall rates will be possible in
stronger storms. Very high instantaneous rainfall rates were
already observed last night near Manassas (around 2-3 inches per
hour), with comparatively much lower instability and slightly
lower precipitable water values. So with the greater instability
in place, more vigorous updrafts this afternoon should be able
to process even greater amounts of the moisture rich airmass,
leading to even higher rainfall rates than were observed
overnight. So despite the disorganized, chaotic nature of the
storms expected today (and resultant limited potential for
training of cells), the threat for flash flooding appears to be
significant, in large part due to the very high rainfall rates
and low flash flood guidance values (following recent heavy
rains). As a result, WPC has placed much of the area in a
moderate risk for excessive rainfall and a Flash Flood Watch is
in effect for the entire area until 11 PM. With the chaotic
nature of the storms today, it is tough to pinpoint individual
areas where the greatest impacts will be felt, since things like
outflow boundary collisions could be what results in prolonged
periods of rain in one given spot. However it's worth noting
that the background environment appears slightly more favorable
for flash flooding along and southeast of I-95/66, where the
highest instability and precipitable water values will reside.
In that same area, profiles will contain less mid-upper level
dry air, which should lead to both more efficient rainfall
processes.

The overall threat for damaging winds appears to be low, but
non-zero. With nearly no background flow in place, any damaging
winds would need to be driven by strong downdrafts. SPC
mesoanalysis currently indicates that the highest DCAPE values
reside to the north and west of I-95/66 (where the presence of
some mid- upper level dry air will help to aid in
evaporationally driven downdraft accelerations). While an
isolated water loaded downburst can't be ruled out anywhere,
think the greatest risk for damaging winds will be along and
northwest of I-95/66 within the higher DCAPE air. Due to this
low-end threat, SPC has placed a sizeable portion of the
forecast area in a marginal risk for damaging winds this
afternoon.

&&

.SHORT TERM /THURSDAY NIGHT THROUGH FRIDAY NIGHT/...
Storms should gradually wind down this evening, but an uptick in
storm coverage is expected again later tonight as a shortwave
disturbance passes to our northwest. In response to this
shortwave, winds at 850 hPa will switch around to out of the
south- southeast, and begin to overrun the stalled boundary.
Within the moist, uncapped environment, this small change may
be enough to spark the development of additional showers and
thunderstorms late tonight into early tomorrow morning. Most
model guidance is focusing this additional activity to the east
of the Blue Ridge. These storms may pose a threat for additional
flash flooding, especially if they move over areas impacted by
storms today. After the disturbance passes by, the frontal
boundary will sag off to the south, shifting the focus for
heavier rainfall in the afternoon to southern portions of the
forecast area (central Virginia to southern Maryland).

Additional showers and thunderstorms will be possible Thursday
Night through Friday Night, as winds shift around to easterly
north of the front. Coverage of showers and storms may begin to
uptick Friday Night as a trough centered over the Ohio Valley
moves closer to the area.

&&

.LONG TERM /SATURDAY THROUGH WEDNESDAY/...
The front that is producing showers and thunderstorms over our area
will return back northward Saturday into Sunday as a wave of low
pressure lifts into the Ohio River Valley. Additional showers and
thunderstorms seem likely during this time, with additional heavy
rainfall possible.

Clearing should commence early next week as the low chases the front
offshore. The flow may buckle a bit toward the middle of next week
resulting in a return to unsettled weather, but details are fuzzy
this far in advance, especially this time of the year when forcing
mechanisms are often subtle.

&&

.AVIATION /02Z THURSDAY THROUGH MONDAY/...

All terminals experienced periods of subVFR conditions toda.
Showers and thunderstorms have moved out of all our terminals
and VFR conditions are currently being reported. Low ceilings
and visibilities may be a concern early tomorrow morning as the
environment is very moist and winds are expected to become
light overnight.

... Previous discussion.....

The main aviation concern over the next couple days will be
thunderstorm coverage. Coverage of storms is expected to
increase today and Thursday. Best risk of storms will be
afternoon/early evening, but could linger into the overnight
hours. There are also some signs that storms may reform late
tonight in the metro areas. As a result, have added another VCTS
to IAD/BWI/DCA/MTN for late tonight into early tomorrow
morning. Some patchy morning low clouds/fog will be possible at
MRB/IAD/CHO during the overnights.

Sub-VFR conditions seem likely at times this weekend in onshore flow
and renewed chances of showers and thunderstorms.

&&

.MARINE...
No significant synoptic wind issues are expected through the
next few days. The main concern through Thursday will be
thunderstorms. Coverage will increase significantly today and
Thursday, with gusty winds a threat from any storm. Best timing
is afternoon and evening, though the risk may linger through
tonight and Thursday night. Special Marine Warnings may be
needed for any stronger storms.

Easterly/onshore flow may breach Small Craft Advisory (SCA)
thresholds this weekend.

&&

.LWX WATCHES/WARNINGS/ADVISORIES...
DC...Flash Flood Watch until 11 PM EDT this evening for DCZ001.
MD...Flash Flood Watch until 11 PM EDT this evening for MDZ003>006-
     011-013-014-016>018-501>508.
VA...Flash Flood Watch until 11 PM EDT this evening for VAZ025>031-
     036>040-050>057-501>508.
WV...Flash Flood Watch until 11 PM EDT this evening for WVZ050>053-
     055-501>506.
MARINE...None.

&&

SYNOPSIS...DHOF
NEAR TERM...KJP/JMG
SHORT TERM...KJP
LONG TERM...DHOF
AVIATION...DHOF/KJP/JMG
MARINE...DHOF/KJP

Hazardous Weather Outlook
National Weather Service Baltimore MD/Washington DC
134 AM EDT Thu Aug 13 2020

ANZ530>543-DCZ001-MDZ011-013-014-016>018-508-VAZ052>057-140545-
Chesapeake Bay north of Pooles Island MD-
Chesapeake Bay from Pooles Island to Sandy Point MD-
Chesapeake Bay from Sandy Point to North Beach MD-
Chesapeake Bay from North Beach to Drum Point MD-
Chesapeake Bay from Drum Point MD to Smith Point VA-
Tidal Potomac from Key Bridge to Indian Head MD-
Tidal Potomac from Indian Head to Cobb Island MD-
Tidal Potomac from Cobb Island MD to Smith Point VA-
Patapsco River including Baltimore Harbor-
Chester River to Queenstown MD-Eastern Bay-
Choptank River to Cambridge MD and the Little Choptank River-
Patuxent River to Broomes Island MD-
Tangier Sound and the inland waters surrounding Bloodsworth
Island-District of Columbia-Southern Baltimore-Prince Georges-
Anne Arundel-Charles-St. Marys-Calvert-Southeast Harford-
Prince William/Manassas/Manassas Park-Fairfax-
Arlington/Falls Church/Alexandria-Stafford-Spotsylvania-
King George-
134 AM EDT Thu Aug 13 2020

This Hazardous Weather Outlook is for the Maryland portion of the
Chesapeake Bay, Tidal Potomac River, and adjacent counties in
central Maryland and northern Virginia as well as the District of
Columbia.

.DAY ONE...Tonight

Storms capable of producing localized heavy rainfall may form during
the early morning periods of Thursday over southern MD.

A Flash Flood Watch has been extended for southern MD until 8 am
Thursday.

.DAYS TWO THROUGH SEVEN...Thursday through Tuesday

Thunderstorms with very heavy rain and a potential for flash
flooding are likely again on Thursday afternoon and evening.

.SPOTTER INFORMATION STATEMENT...

Spotter activation is not expected at this time. But any flooding
reports should be relayed to the National Weather Service.

MDZ003>006-501>507-VAZ025>031-036>040-050-051-501>508-WVZ050>053-
055-501>506-140545-
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-
134 AM EDT Thu Aug 13 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...Tonight

No hazardous weather is expected at this time.

.DAYS TWO THROUGH SEVEN...Thursday through Tuesday

Thunderstorms with very heavy rain and a potential for flash
flooding are likely again on Thursday afternoon and evening.

.SPOTTER INFORMATION STATEMENT...

Spotter activation is not expected at this time. But any flooding
reports should be relayed to the National Weather Service.

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE BALTIMORE MD/WASHINGTON DC
853 PM EDT WED AUG 12 2020

..TIME...   ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
..DATE...   ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
            ..REMARKS..

0529 PM     TSTM WND DMG     2 SW CATONSVILLE        39.25N  76.77W
08/12/2020                   HOWARD             MD   BROADCAST MEDIA

            TREES DOWN ON POWER LINES NEAR BEECHWOOD ROAD AND
            BONNIE BRANCH ROAD.

&&

EVENT NUMBER LWX2002106

BKF

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE BALTIMORE MD/WASHINGTON DC
927 PM EDT WED AUG 12 2020

..TIME...   ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
..DATE...   ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
            ..REMARKS..

0810 PM     FLOOD            1 WSW STAUNTON          38.15N  79.08W
08/12/2020                   CITY OF STAUNTON   VA   FIRE DEPT/RESCUE

            WATER RESCUE REPORTED ON MONTGOMERY AVE NEAR WEST
            BEVERLY STREET.

&&

EVENT NUMBER LWX2002107

JMG

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE BALTIMORE MD/WASHINGTON DC
928 PM EDT WED AUG 12 2020

..TIME...   ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
..DATE...   ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
            ..REMARKS..

0732 PM     TSTM WND DMG     2 SE ROUND HILL         39.12N  77.74W
08/12/2020                   LOUDOUN            VA   PUBLIC

            SEVERAL TREES DOWN SOUTHWEST OF PURCELLVILLE, INCLUDING
            ON TRANQUILITY RD AND SILCOTT SPRINGS RD

&&

EVENT NUMBER LWX2002108

ADS

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE BALTIMORE MD/WASHINGTON DC
929 PM EDT WED AUG 12 2020

..TIME...   ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
..DATE...   ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
            ..REMARKS..

0810 PM     FLOOD            2 WSW STAUNTON          38.15N  79.09W
08/12/2020                   CITY OF STAUNTON   VA   FIRE DEPT/RESCUE

            WATER RESCUE REPORTED ON HAYS AVE.

&&

EVENT NUMBER LWX2002109

JMG

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE BALTIMORE MD/WASHINGTON DC
1005 PM EDT WED AUG 12 2020

..TIME...   ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
..DATE...   ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
            ..REMARKS..

1004 PM     FLOOD            1 NW RIDGELEY           39.65N  78.78W
08/12/2020                   ALLEGANY           MD   TRAINED SPOTTER

            ABOUT A FOOT OF FLOWING WATER OVER THE INTERSECTION AT
            E OLDTOWN RD. AND BLACKISTON AVE.

&&

EVENT NUMBER LWX2002110

CJL

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE BALTIMORE MD/WASHINGTON DC
1029 PM EDT WED AUG 12 2020

..TIME...   ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
..DATE...   ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
            ..REMARKS..

1000 PM     DEBRIS FLOW      1 SE CUMBERLAND         39.65N  78.76W
08/12/2020                   ALLEGANY           MD   911 CALL CENTER

            MUDSLIDE REPORTED ON MARYLAND AVENUE.

&&

EVENT NUMBER LWX2002111

BKF