Alert archive / Virginia / Tornado Warnings in 2024

Tornado Warning 39, NWS Baltimore/Washington

August 8, 2024Clarke County, Fauquier County, Loudoun County, Virginia

NWS Baltimore/Washington issued this tornado warning at Aug 8, 2024, 9:40 PM EDT for Clarke County, Fauquier County, Loudoun County, Virginia. It was in force for 35 min. No storm report in the archive falls inside the area while it was in force.

The area

The outline as issued.

The facts

Issued
Aug 8, 2024, 9:40 PM EDT (01:40 UTC)
Expired
Aug 8, 2024, 10:15 PM EDT
In force
35 min
Issued by
NWS Baltimore/Washington
Area
Storm-based polygon
Tornado
Radar indicated
Hail
0.0 in

Counties Clarke County, VA, Fauquier County, VA, Loudoun County, VA

The radar

The Sterling radar (KLWX), 27 km from the middle of the area, began a volume at 01:43 UTC, the scan nearest the moment this went out.

Open the radar archive at this moment

The archived warnings, watches and discussions in force at that minute are drawn over the scan, this one among them.

Did it verify

Not verified. The Iowa Environmental Mesonet's Cow found no qualifying storm report inside this tornado warning while it was in force. That is not proof nothing happened: reports are thin where few people live.

Cow counts a report within 15 km of the polygon while the warning was in force: a tornado for a tornado warning; hail of 1 inch or more, a gust of 58 mph or more or wind damage for a severe thunderstorm warning; a flash flood report for a flash flood warning.

The watch it was issued in

The SPC watch in force over the same counties when this warning went out.

IssuedProductOfficeLasted
Aug 8, 6:37 PM EDTTornado WatchSPC12 hr

The nearest sounding before it

Washington/Dulle, VA (KIAD), launched 00:00Z, 1.7 hours before the alert went out and 35 km from the middle of its area. This is the routine balloon launch nearest before it, the air the forecaster had in hand, not a measurement taken for the alert.

Skew-T log-pSkew-T log-p diagram, Washington/Dulle, VA at 00:00Z on 2024-08-09Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 886 joules per kilogram.LCLLFCEL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°0°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Washington/Dulle, VA at 00:00Z on 2024-08-09The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 70 square meters per square second.193958Sfc1 km3 km6 km9 kmRMLM
The wind turning with height, colored by layer: ground to 1 km, 1 to 3 km, 3 to 6 km, 6 to 10 km.
Mixed-layer CAPE
886 J/kg
Mixed-layer CIN
-5 J/kg
Mixed-layer LCL
607 m above ground
0-6 km bulk shear
22 kt
0-1 km storm-relative helicity
70 m²/s²
0-3 km storm-relative helicity
132 m²/s²
Significant tornado parameter
0.2
Supercell composite
1.4

Open this sounding in Storm Lab

The text

As transmitted.

123 
WFUS51 KLWX 090140
TORLWX
VAC043-061-107-090215-
/O.NEW.KLWX.TO.W.0039.240809T0140Z-240809T0215Z/

BULLETIN - EAS ACTIVATION REQUESTED
Tornado Warning
National Weather Service Baltimore MD/Washington DC
940 PM EDT Thu Aug 8 2024

The National Weather Service in Sterling Virginia has issued a

* Tornado Warning for...
  West central Loudoun County in northern Virginia...
  East central Clarke County in northwestern Virginia...
  Northern Fauquier County in northern Virginia...

* Until 1015 PM EDT.

* At 939 PM EDT, a severe thunderstorm capable of producing a tornado
  was located over Middleburg, or 13 miles west of Brambleton, moving
  northwest at 25 mph.

  HAZARD...Tornado.

  SOURCE...Radar indicated rotation.

  IMPACT...For those in the direct path of a tornado touchdown, 
           flying debris will be dangerous to those caught without 
           shelter. Damage to roofs, siding, and windows may occur. 
           Mobile homes may be damaged or destroyed. Tree damage is 
           likely.

* This dangerous storm will be near...
  Bluemont around 945 PM EDT.

Other locations impacted by this tornadic thunderstorm include Saint
Louis.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

TAKE COVER NOW! Move to a basement or an interior room on the lowest
floor of a sturdy building. Avoid windows. If you are outdoors, in a
mobile home, or in a vehicle, move to the closest substantial shelter
and protect yourself from flying debris.

Tornadoes are extremely difficult to see and confirm at night. Do not
wait to see or hear the tornado. TAKE COVER NOW!

Torrential rainfall is occurring with this storm, and may lead to
flash flooding. Do not drive your vehicle through flooded roadways.

&&

LAT...LON 3898 7771 3895 7779 3909 7794 3914 7781
TIME...MOT...LOC 0139Z 149DEG 20KT 3899 7777 

TORNADO...RADAR INDICATED
MAX HAIL SIZE...0.00 IN

$$

AVS
3 follow-up statements
719 
WWUS51 KLWX 090143
SVSLWX

Severe Weather Statement
National Weather Service Baltimore MD/Washington DC
943 PM EDT Thu Aug 8 2024

VAC061-090152-
/O.CAN.KLWX.TO.W.0039.000000T0000Z-240809T0215Z/
Fauquier VA-
943 PM EDT Thu Aug 8 2024

...THE TORNADO WARNING FOR NORTHERN FAUQUIER COUNTY IS CANCELLED...

The tornadic thunderstorm which prompted the warning has moved out 
of the warned area. Therefore, the warning has been cancelled.

A Tornado Watch remains in effect until 700 AM EDT for northern and
northwestern Virginia.

&&

LAT...LON 3914 7781 3900 7773 3898 7781 3909 7794
TIME...MOT...LOC 0142Z 149DEG 20KT 3901 7778 

$$

VAC043-107-090215-
/O.CON.KLWX.TO.W.0039.000000T0000Z-240809T0215Z/
Loudoun VA-Clarke VA-
943 PM EDT Thu Aug 8 2024

...A TORNADO WARNING REMAINS IN EFFECT UNTIL 1015 PM EDT FOR WEST
CENTRAL LOUDOUN AND EAST CENTRAL CLARKE COUNTIES...

At 942 PM EDT, a severe thunderstorm capable of producing a tornado
was located near Middleburg, or 13 miles west of Brambleton, moving
northwest at 25 mph.

HAZARD...Tornado.

SOURCE...Radar indicated rotation.

IMPACT...For those in the direct path of a tornado touchdown, flying 
         debris will be dangerous to those caught without shelter. 
         Damage to roofs, siding, and windows may occur. Mobile 
         homes may be damaged or destroyed. Tree damage is likely.

This dangerous storm will be near...
  Bluemont around 950 PM EDT.

Other locations impacted by this tornadic thunderstorm include Saint
Louis.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

TAKE COVER NOW! Move to a basement or an interior room on the lowest
floor of a sturdy building. Avoid windows. If you are outdoors, in a
mobile home, or in a vehicle, move to the closest substantial shelter
and protect yourself from flying debris.

Tornadoes are extremely difficult to see and confirm at night. Do not
wait to see or hear the tornado. TAKE COVER NOW!

Torrential rainfall is occurring with this storm, and may lead to
flash flooding. Do not drive your vehicle through flooded roadways.

&&

LAT...LON 3914 7781 3900 7773 3898 7781 3909 7794
TIME...MOT...LOC 0142Z 149DEG 20KT 3901 7778 

TORNADO...RADAR INDICATED
MAX HAIL SIZE...0.00 IN

$$

AVS
215 
WWUS51 KLWX 090150
SVSLWX

Severe Weather Statement
National Weather Service Baltimore MD/Washington DC
950 PM EDT Thu Aug 8 2024

VAC043-107-090215-
/O.CON.KLWX.TO.W.0039.000000T0000Z-240809T0215Z/
Loudoun VA-Clarke VA-
950 PM EDT Thu Aug 8 2024

...A TORNADO WARNING REMAINS IN EFFECT UNTIL 1015 PM EDT FOR WEST
CENTRAL LOUDOUN AND EAST CENTRAL CLARKE COUNTIES...

At 950 PM EDT, a severe thunderstorm capable of producing a tornado
was located near Bluemont, or 14 miles west of Leesburg, moving
northwest at 25 mph.

HAZARD...Tornado.

SOURCE...Radar indicated rotation.

IMPACT...For those in the direct path of a tornado touchdown, flying 
         debris will be dangerous to those caught without shelter. 
         Damage to roofs, siding, and windows may occur. Mobile 
         homes may be damaged or destroyed. Tree damage is likely.

This dangerous storm will be near...
  Bluemont around 955 PM EDT.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

TAKE COVER NOW! Move to a basement or an interior room on the lowest
floor of a sturdy building. Avoid windows. If you are outdoors, in a
mobile home, or in a vehicle, move to the closest substantial shelter
and protect yourself from flying debris.

Tornadoes are extremely difficult to see and confirm at night. Do not
wait to see or hear the tornado. TAKE COVER NOW!

Torrential rainfall is occurring with this storm, and may lead to
flash flooding. Do not drive your vehicle through flooded roadways.

&&

LAT...LON 3914 7781 3904 7777 3901 7784 3909 7794
TIME...MOT...LOC 0150Z 149DEG 20KT 3905 7781 

TORNADO...RADAR INDICATED
MAX HAIL SIZE...0.00 IN

$$

AVS
910 
WWUS51 KLWX 090205
SVSLWX

Severe Weather Statement
National Weather Service Baltimore MD/Washington DC
1005 PM EDT Thu Aug 8 2024

VAC043-107-090215-
/O.EXP.KLWX.TO.W.0039.000000T0000Z-240809T0215Z/
Loudoun VA-Clarke VA-
1005 PM EDT Thu Aug 8 2024

...THE TORNADO WARNING FOR WEST CENTRAL LOUDOUN AND EAST CENTRAL
CLARKE COUNTIES WILL EXPIRE AT 1015 PM EDT...

The storm which prompted the warning has weakened below severe
limits, and no longer appears capable of producing a tornado.
Therefore, the warning will be allowed to expire.  However, heavy
rain is still possible with this thunderstorm.

A Tornado Watch remains in effect until 700 AM EDT for northern and
northwestern Virginia.

&&

LAT...LON 3914 7781 3904 7777 3901 7784 3909 7794
TIME...MOT...LOC 0205Z 149DEG 20KT 3912 7786 

$$

AVS

What forecasters said that day

The local office's own words before this tornado warning went out, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.

NWS Baltimore/Washington wrote its last area forecast discussion before this tornado warning went out at Aug 8, 4:02 PM EDT, 5 hours 38 minutes earlier.

Area forecast discussion, Aug 8, 4:02 PM EDT, 5 hours 38 minutes before
Area Forecast Discussion
National Weather Service Baltimore MD/Washington DC
402 PM EDT Thu Aug 8 2024

.SYNOPSIS...
The remnants of Debby will move through the area tonight into
Friday, before passing off toward our northeast on Friday night.
Thereafter, high pressure will build over the area into early
next week.

&&

.NEAR TERM /THROUGH FRIDAY/...
The latest NHC advisory shows Tropical Storm Debby centered
along the North Carolina/South Carolina border. Well off to our
northwest, a broad upper trough is centered over the Western
Great Lakes and Upper Midwest. Debby's circulation is starting
to feel the influence of that trough well off to our northwest,
and is being drawn northward in response. As this interaction
with the upstream trough occurs, Debby will also start to turn
extratropical in nature. As we move forward in time, the
remnants of Debby will track northward through the Shenandoah
Valley tonight, before moving northward across Pennsylvania
tomorrow. The system should eventually reach upstate New York by
tomorrow evening. As the system tracks northward through our
area it will produce a number of weather hazards, which are
discussed more in-depth below...

Heavy Rainfall/Flooding: Current radar imagery shows numerous
showers/downpours ongoing in advance of Debby's main circulation
across northern Virginia, Maryland, and the West Virginia
Panhandle. These heavier showers are occurring within a
warm/moist advection regime ahead of Debby, and are producing
very heavy rainfall for brief periods of time. Due to the rather
disorganized nature and brief duration of these showers,
flooding isn't anticipated. However, they may lead to brief
reduced visibility, or some ponding on roadways.

The main precipitation shield associated with Debby is just
starting to work into central Virginia, with the heaviest
rainfall situated across southern Virginia. The heaviest of
these rains will work northward into central Virginia over the
next several hours, and continue across central Virginia through
at least the first half of the night. The steadiest rains may
move to the north of central Virginia during the second half of
the night, but more intermittent heavier bursts of convective
rainfall may still be possible through the second half of the
night. The steadier precipitation shield will spread northward
through the Shenandoah Valley and Potomac Highlands through the
night. Very heavy rainfall will likely lead to widespread
flooding issues tonight from central Virginia northward through
the Shenandoah Valley. A rare High Risk for excessive rainfall
from WPC has been issued across these areas. The West Virginia
Panhandle and western Maryland will also get into the steady,
heavy rainfall tonight, with much of it falling during the
second half of the night. These locations will likely
experiences issues with Flash Flooding during the second half of
the night. Overall, a widespread 3-5 inches of rainfall is
expected for these locations, with isolated totals up to 7
inches. Locally higher totals approaching 10 inches may be
possible along the east facing slopes of the Blue Ridge, where
upslope easterly flow may will lead to orographic enhancement of
the rain. For those reasons, the above locations are in a Flood
Watch for flash flooding from 8 PM tonight through 8 PM
tomorrow.

Further east, rainfall will be more intermittent and showery
along the I-95 corridor tonight as the core of the system
passes to the west. As a result, issues with flooding aren't
anticipated overnight. Tomorrow, as the system tracks northward
into Pennsylvania, a feeder rainfall band is expected to
develop to the south of the circulation and slowly track
eastward across locations to the east of the Blue Ridge. Very
heavy rainfall may be possible within this band, and could lead
to localized instances of flash flooding where training occurs.
Confidence in widespread flooding associated with this activity
tomorrow morning through mid-afternoon tomorrow remains too low
for a Flood Watch, but one may potentially be considered at a
later time. For locations further east (outside of the Flood
Watch), a broad 1-3 inches of rainfall is expected, with more
localized totals up to 5 inches. Rainfall should finally move
out of the area late tomorrow afternoon.

Tornadoes: There is growing concern that tornadoes may impact
portions of the area, especially later this evening into the
overnight hours. The zone with an environment most favorable
for tornadoes is currently located to our south over southern
Virginia and North Carolina. Over time, this environment
characterized by ample shear in the low levels, limited
instability, and large curved hodographs will lift northward
into our area, with tornado potential in central Virginia likely
beginning somewhere within the 6-8 PM time window. As the
system tracks northward through the night, the area favorable
for tornadoes will spread northward through the Shenandoah
Valley and into the West Virginia Panhandle. SPC has highlighted
these locations in a Slight Risk for severe thunderstorms,
driven by tornadoes. With the potential for most of this
activity to occur after dark, we encourage people to have a way
to receive tornado warnings at night, and to be ready to take
shelter in the middle of the night, if needed.

The threat for tornadoes may shift eastward tomorrow to
locations east of the Blue Ridge within the aforementioned
feeder band that will develop to the south of the circulation
as it tracks into Pennsylvania. Any tornado potential tomorrow
would likely be maximized during the morning to early afternoon
hours. SPC has upgraded the Baltimore area to a Slight Risk for
severe thunderstorms tomorrow, with the threat being driven by
both tornadoes and damaging straight line winds. Overall, 0-1 km
SRH is lower compared to overnight, so that may lead to a
slightly lower tornado potential than overnight, but chances for
straight line winds will be increased as limited heating and
destabilization occurs ahead of the convective line.

Background winds: Outside of any thunderstorms, winds may gust
to around 30-40 mph at times, especially during the daylight
hours to the east of the Blue Ridge. This may be enough to bring
down a few trees with saturated soil conditions, but is below
the Wind Advisory threshold of 40 knots/46 mph.

&&

.SHORT TERM /FRIDAY NIGHT THROUGH SATURDAY NIGHT/...
The remnants of Debby will lift off to our northeast and start
to shear apart by later Friday night. Any rain is expected to
come to an end by late Friday evening, with dry conditions
expected through the majority of the night. Winds will turn
northwesterly as a cold front moves through.

Upper troughing will build to our north over southern Canada on
Saturday. Sunny skies and much less humid conditions are
expected, with high temperatures in the 80s, and dewpoints in
the 50s and lower 60s.

&&

.LONG TERM /SUNDAY THROUGH WEDNESDAY/...
A ridge of high pressure will continue to influence tranquil
conditions Sunday and Monday. Light northwest winds and high
temperatures in the lower to middle 80s expected each day.

A weak boundary will work its way across the region from northwest
to southeast on Tuesday. There is a chance for a few showers or a
rumble of thunder Tuesday afternoon, but confidence is low given
current model guidance. Highs Tuesday will be in the middle 80s as
well.

A reinforcing area of high pressure will build across the region on
Wednesday. Dry conditions and light and variable winds expected
during the period. Highs in the middle 80s.

&&

.AVIATION /18Z THURSDAY THROUGH TUESDAY/...
Ceilings are predominantly MVFR at the terminals this afternoon.
Numerous showers are present throughout the area, and a few
thunderstorms can't be ruled out this afternoon as well.
Ceilings are expected to drop to IFR tonight. The remnants of
Debby will track through the Shenandoah Valley and Potomac
Highlands tonight. The main precipitation shield will directly
impact CHO and MRB through much of the night. Terminals further
east may avoid the steadiest and heaviest rain during the night,
but showers will remain possible. Low-level winds shear will
also be possible at all of the terminals tonight. Winds this
afternoon into tonight will generally be out of the east.

Winds tomorrow will be out of the south, and may gust to around
20-35 knots at times. Showers and thunderstorms will be
possible at all terminals tomorrow morning into the first half
of the afternoon. Any thunderstorms should gradually progress
off toward the east later tomorrow afternoon into the evening.
After a prolonged period of IFR conditions, ceilings should
finally improve back to MVFR and then VFR later tomorrow
afternoon into tomorrow evening from west to east. Winds will
turn from southerly to northwesterly as a cold front moves
through tomorrow evening. VFR conditions and northwesterly winds
are expected on Saturday.

VFR conditions Sunday through Monday night. Winds light and out of
the northwest mainly.

&&

.MARINE...
SCAs are in effect over the waters this afternoon in easterly
flow. Winds will gradually increase this evening into the
overnight as the remnants of Debby track to the west of the
waters. Gales go into effect to the south of the Bay
Bridge/Indian Head at 6 PM, and further north at 6 AM, and
continue through the day tomorrow. Gusts up to 40 knots out of
the south to southeast will be possible during that time.
Waterspouts also can't be ruled out, especially during the day
tomorrow.

Winds will turn northwesterly behind a cold front Friday night.
SCA level winds will likely continue in northwesterly flow
Friday night into Saturday.

No marine hazards expected Sunday through Monday night. Winds will
be generally out of the northwest.

&&

.HYDROLOGY...
A broad area of Flood Watches have been issued across the
western half of the area due to the threat of flash flooding.
More specifically, this covers much of central Virginia and all
areas along and west of the Blue Ridge Mountains. The watch is
in effect from 8 PM this evening until 8 PM Friday in response
to the heavy rain associated with the remnants of what is still
Tropical Storm Debby. The current expectation is for a
widespread 3 to 5 inches across the mentioned area, with
localized amounts approaching 8 to 10 inches, especially along
the eastern slopes of the Blue Ridge. Although a bulk of the
area bounded by the Flood Watch is in a D3 (Extreme) drought,
this healthy amount of rain will increase the risk of flash
flooding. A broad 2 to 4 inches is possible for those east of
the Blue Ridge. Will continue to monitor any need for hydrology
watches in such areas.

Larger stem river flooding may continue into this weekend as
water filters down through the Potomac basin.

&&

.TIDES/COASTAL FLOODING...
Water levels quickly rose this morning in strong southerly winds,
with many points along the Tidal Potomac and Western Shore reaching
minor flood stage. Widespread minor flooding is likely to occur in
most locations during the next three high tide cycles (this evening,
Friday morning, and Friday evening/night). Water levels continue to
increase over the next 24 hours as the main circulation associated
with TC Debby moves into SW VA, then up along the Blue Ridge into PA
Friday into Friday night. The highest water levels are expected
during the Friday evening/night high tide cycle, where Moderate
flooding is expected at Annapolis, and is possible at DC SW
Waterfront, Alexandria, Baltimore, Solomons Island, and Straits
Point. Additional Coastal Flood Advisories and Coastal Flood
Warnings will be issued by this evening to account for the ongoing
coastal flood threat. Water levels start decreasing rapidly early
Saturday as the low pulls away.

&&

.LWX WATCHES/WARNINGS/ADVISORIES...
DC...None.
MD...Small Craft Advisory until 6 AM EDT Friday for MDZ008.
     Gale Warning from 6 AM to 10 PM EDT Friday for MDZ008.
     Flood Watch from 8 PM EDT this evening through Friday evening
     for MDZ001-003-004-501-502.
     Coastal Flood Advisory from 7 PM this evening to midnight EDT
     tonight for MDZ014.
     Coastal Flood Watch from late tonight through late Friday
     night for MDZ014.
     Coastal Flood Advisory until 9 PM EDT this evening for MDZ016.
VA...Flood Watch from 8 PM EDT this evening through Friday evening
     for VAZ025>031-036>040-050-051-501-503>505-507-508.
     Coastal Flood Advisory until 9 PM EDT this evening for VAZ057.
WV...Flood Watch from 8 PM EDT this evening through Friday evening
     for WVZ050>053-055-501>506.
MARINE...Small Craft Advisory until 6 AM EDT Friday for ANZ530-531-535-
     538-539.
     Gale Warning from 6 AM to 10 PM EDT Friday for ANZ530-531-535-
     538-539.
     Small Craft Advisory until 8 PM EDT this evening for
     ANZ532>534-536-537-540>543.
     Gale Warning from 8 PM this evening to 10 PM EDT Friday for
     ANZ532>534-536-537-540>543.

&&

SYNOPSIS...KJP
NEAR TERM...KJP
SHORT TERM...KJP
LONG TERM...KLW
AVIATION...KLW/KJP
MARINE...KLW/KJP
HYDROLOGY...LWX
TIDES/COASTAL FLOODING...LWX
Hazardous weather outlook, Aug 8, 6:51 PM EDT, 2 hours 49 minutes before
Hazardous Weather Outlook
National Weather Service Baltimore MD/Washington DC
651 PM EDT Thu Aug 8 2024

ANZ530>543-DCZ001-MDZ008-011-013-014-016>018-504-506-508-
VAZ053>057-527-092300-
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-Cecil-Southern Baltimore-
Prince Georges-Anne Arundel-Charles-St. Marys-Calvert-
Central and Southeast Montgomery-Central and Southeast Howard-
Southeast Harford-Fairfax-Arlington/Falls Church/Alexandria-
Stafford-Spotsylvania-King George-
Central and Southeast Prince William/Manassas/Manassas Park-
651 PM EDT Thu Aug 8 2024

This Hazardous Weather Outlook is for the Maryland portion of the
Chesapeake Bay, Tidal Potomac River, and I-95 corridor through
central Maryland, northern Virginia, and District of Columbia.

.DAY ONE...Tonight

A Tornado Watch has been issued for the entire outlook area
through 7 AM Friday. Brief tornadoes are possible as Tropical
Depression Debby approaches from the south.

A Flood Watch is currently in effect for much of the outlook
area through tonight outside of southern Maryland and far central
Virginia. Scattered to numerous instances of flooding are
possible, especially tonight, and within the urban corridors.

A Gale Warning is in effect for the waters south of Sandy Point
in the Chesapeake Bay and south of Indian Head in the tidal
Potomac River starting at 8 PM tonight.

A Coastal Flood Warning goes into effect at 2 AM tonight across Anne
Arundel County.

.DAYS TWO THROUGH SEVEN...Friday through Wednesday

The Flood Watch continues through 8 PM Friday evening for the
affected areas.

A Gale Warning remains in effect for all waters through 8 PM
Friday.

A Coastal Flood Warning continues until 4 AM Saturday across Anne
Arundel County.

The remnants of tropical cyclone Debby will move across the region
through Friday night. Potential impacts include flooding due to
heavy rainfall, a brief tornado, gusty winds, and additional
tidal flooding.

For the latest information on the track and potential impacts
from Debby, please consult forecasts from the National Hurricane
Center at hurricanes.gov.

.SPOTTER INFORMATION STATEMENT...

Spotter activation is likely needed at times through Friday.

MDZ003>006-503-505-507-VAZ025>031-036>040-050-051-501-502-505>508-
526-WVZ050>053-055-092300-
Washington-Frederick MD-Carroll-Northern Baltimore-
Northwest Montgomery-Northwest Howard-Northwest Harford-Augusta-
Rockingham-Shenandoah-Frederick VA-Page-Warren-Clarke-Nelson-
Albemarle-Greene-Madison-Rappahannock-Orange-Culpeper-
Northern Fauquier-Southern Fauquier-Western Loudoun-
Eastern Loudoun-Northern Virginia Blue Ridge-
Central Virginia Blue Ridge-Northwest Prince William-Hampshire-
Morgan-Berkeley-Jefferson-Hardy-
651 PM EDT Thu Aug 8 2024

This Hazardous Weather Outlook is for portions of eastern West
Virginia, northern and central Virginia, and central and western
Maryland.

.DAY ONE...Tonight

A Tornado Watch has been issued for the entire outlook area
through 7 AM Friday. Brief tornadoes are possible as Tropical
Depression Debby approaches from the south.

A Flood Watch is currently in effect for the entire outlook area
through tonight. Scattered to numerous instances of flooding are
possible, especially tonight. There is a considerable threat for
flash flooding for areas near the Blue Ridge Mountains.

Wind Advisories are in effect across the Blue Ridge Mountains
through tonight. A few power outages may result from the gusty
winds.

.DAYS TWO THROUGH SEVEN...Friday through Wednesday

The Flood Watch continues through 8 PM Friday evening. Some river
flooding could linger into the weekend.

A brief tornado or two is possible Friday, mainly near the
Interstate 95 corridor.

Wind Advisories continue until 11 AM Friday across the Blue Ridge
Mountains through tonight. A few power outages may result from
the gusty winds.

For the latest information on the track and potential impacts
from Debby, please consult forecasts from the National Hurricane
Center at hurricanes.gov.

.SPOTTER INFORMATION STATEMENT...

Spotter activation is likely needed at times through Friday.

MDZ001-501-502-VAZ503-504-WVZ501>506-092300-
Garrett-Extreme Western Allegany-Central and Eastern Allegany-
Western Highland-Eastern Highland-Western Grant-Eastern Grant-
Western Mineral-Eastern Mineral-Western Pendleton-
Eastern Pendleton-
651 PM EDT Thu Aug 8 2024

This Hazardous Weather Outlook is for the Allegheny Front
counties in western Maryland, eastern West Virginia, and Highland
County Virginia.

.DAY ONE...Tonight

A Flood Watch is in effect for the entire outlook area through
tonight. Scattered to numerous instances of flooding are
possible, especially tonight.

.DAYS TWO THROUGH SEVEN...Friday through Wednesday

The Flood Watch continues through 8 PM Friday evening. Some river
flooding could linger into the weekend.

For the latest information on the track and potential impacts
from Debby, please consult forecasts from the National Hurricane
Center at hurricanes.gov.

.SPOTTER INFORMATION STATEMENT...

Spotter activation is likely needed at times through Friday.

In the hours before

Local storm report, Aug 8, 8:09 PM EDT, 1 hour 31 minutes before
Preliminary Local Storm Report
National Weather Service Baltimore MD/Washington DC
809 PM EDT Thu Aug 08 2024

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

0730 PM     Non-Tstm Wnd Dmg 2 W Rockville           39.08N  77.18W
08/08/2024                   Montgomery         MD   Public

            Large tree down crossing Hurely Avenue near
            intersection with Sherbrooke Way.

&&

Event Number LWX2403797

LEE
Local storm report, Aug 8, 8:11 PM EDT, 1 hour 29 minutes before
Preliminary Local Storm Report
National Weather Service Baltimore MD/Washington DC
811 PM EDT Thu Aug 08 2024

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

0716 PM     Tstm Wnd Dmg     1 S Brookfield          38.29N  77.43W
08/08/2024                   Stafford           VA   911 Call Center

            Tree down in the 30 block of Blair Road

&&

Event Number LWX2403798

LEE
Local storm report, Aug 8, 9:26 PM EDT, 14 minutes before
Preliminary Local Storm Report
National Weather Service Baltimore MD/Washington DC
926 PM EDT Thu Aug 08 2024

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

0800 PM     Tornado          1 S Heflin              38.47N  77.58W
08/08/2024                   Stafford           VA   Public

            Several trees down along Hartwood Rd. near Park Farm
            Ln. Tornado preliminarily confirmed by dual-pol radar
            analysis, and will be followed up by a ground survey in
            the coming days.

&&

Event Number LWX2403799

CJL

The office that day

Everything else NWS Baltimore/Washington issued on the same UTC day.

IssuedProductOfficeCountiesLasted
Aug 8, 8:00 PM EDTTornado WarningLWXPrince William, Stafford30 min
Aug 8, 8:13 PM EDTTornado Warning Tornado observedLWXFauquier18 min
Aug 8, 8:14 PM EDTTornado WarningLWXFauquier18 min
Aug 8, 9:07 PM EDTFlash Flood WarningLWXClarke, Fauquier, Frederick, Loudoun, Rappahannock, Warren and 1 more6 hr
Aug 8, 9:07 PM EDTTornado WarningLWXClarke, Fauquier, Loudoun23 min
Aug 8, 9:26 PM EDTTornado Warning Tornado observedLWXClarke, Frederick, Loudoun19 min
Aug 8, 10:48 PM EDTFlash Flood WarningLWXAlbemarle, Augusta, Nelson, City of Staunton, City of Waynesboro7 hr
Aug 8, 10:52 PM EDTFlash Flood WarningLWXGreene, Madison, Page, Rappahannock, Rockingham, Warren10 hr
Aug 8, 11:53 PM EDTFlash Flood WarningLWXFrederick3 hr
Aug 9, 2:49 AM EDTAreal Flood WarningLWXFrederick28 hr
Aug 9, 3:16 AM EDTAreal Flood WarningLWXAugusta, Rockingham, City of Harrisonburg6 hr
Aug 9, 3:25 AM EDTAreal Flood WarningLWXClarke, Fauquier, Frederick, Loudoun, Rappahannock, Warren and 1 more10 hr
Aug 9, 4:19 AM EDTFlash Flood WarningLWXFrederick, Page, Rockingham, Shenandoah, Warren3 hr
Aug 9, 4:39 AM EDTTornado WarningLWXKing George17 min
Aug 9, 4:41 AM EDTSpecial Marine WarningLWX34 min
Aug 9, 5:07 AM EDTAreal Flood WarningLWXAlbemarle, Culpeper, Greene, Madison, Orange, City of Charlottesville13 hr
Aug 9, 5:17 AM EDTFlash Flood WarningLWXFrederick2 hr
Aug 9, 5:37 AM EDTAreal Flood WarningLWXAlbemarle, Augusta, Nelson, City of Waynesboro6 hr
Aug 9, 5:45 AM EDTTornado WarningLWXKing George30 min
Aug 9, 5:48 AM EDTSpecial Marine WarningLWX27 min
Aug 9, 6:19 AM EDTSpecial Marine WarningLWX26 min
Aug 9, 6:22 AM EDTTornado WarningLWXArlington, Fairfax, Prince William, City of Alexandria23 min
Aug 9, 6:31 AM EDTFlash Flood Warning Considerable damage threatLWXGreene, Madison, Page, Rockingham3 hr
Aug 9, 6:37 AM EDTFlash Flood WarningLWXArlington, Fairfax, City of Alexandria, City of Falls Church2 hr
Aug 9, 7:28 AM EDTAreal Flood WarningLWXFrederick, Page, Rockingham, Shenandoah, Warren7 hr
Aug 9, 7:46 AM EDTAreal Flood WarningLWXFrederick7 hr
Aug 9, 7:48 AM EDTSpecial Marine WarningLWX42 min
Aug 9, 7:48 AM EDTTornado WarningLWXFairfax27 min
Aug 9, 8:00 AM EDTFlash Flood WarningLWXArlington, Fairfax, City of Alexandria3 hr
Aug 9, 8:35 AM EDTAreal Flood WarningLWXGreene, Madison, Page, Rappahannock, Rockingham, Warren5 hr
Aug 9, 9:04 AM EDTAreal Flood WarningLWXArlington, Fairfax, City of Alexandria, City of Falls Church4 hr
Aug 9, 9:36 AM EDTSmall Craft AdvisoryLWX12 hr
Aug 9, 10:33 AM EDTAreal Flood WarningLWXArlington, Fairfax, City of Alexandria3 hr
Aug 9, 11:07 AM EDTSpecial Marine WarningLWX68 min
Aug 9, 11:59 AM EDTRiver Flood WarningLWXCulpeper, Fauquier6 hr
Aug 9, 5:08 PM EDTAreal Flood WarningLWXFrederick, Shenandoah10 hr
Aug 9, 6:22 PM EDTRiver Flood WarningLWXLoudoun22 hr
Aug 9, 7:46 PM EDTRiver Flood WarningLWXClarke, Warren13 hr

Nearby

Tornado Warnings in Virginia, 2024Every tornado warning in 2024Tornadoes in 2024

Sources

The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.