An isolated incident of flooding occurred from locally heavy rain in Nelson County.
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Deaths and injuries are direct and indirect together, as the offices filed them. Damage is property and crops in the dollars of the year, not adjusted for inflation, and only where an office estimated it.
The episode as NWS LWX wrote it up.
An isolated incident of flooding occurred from locally heavy rain in Nelson County.
The local office's own words before the first event, 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 the first event at Aug 5, 9:34 AM EST, 3 hours 41 minutes earlier.
Area Forecast Discussion National Weather Service Baltimore MD/Washington DC 1034 AM EDT Sun Aug 5 2018 .SYNOPSIS... High pressure will remain over the western Atlantic through Monday while an upper-level high builds to the south. A cold front will approach the Mid-Atlantic Tuesday into Wednesday before passing through Wednesday night. High pressure will briefly return for Thursday into Friday, but an upper-level trough may impact the area next weekend. && .NEAR TERM /THROUGH TONIGHT/... Early morning fog has dissipated, and skies are mostly sunny across much of the region at present. Some clouds are persistent over western VA and eastern WV in association with an upper low. For the remainder of today, the subtropical ridge will strengthen over the southeastern CONUS while surface high pressure remains over the Atlantic. The aforementioned weak upper-level low will pass through the area during this time. A light southerly flow around the surface high and rising heights compared to yesterday should allow for more hot and humid conditions along with some sunshine. Latest guidance progs 925-850mb temps to be roughly 2 to 3 degrees C warmer than yesterday, so max temps are most likely to be a bit warmer than yesterday. Max temps are forecast to range from the upper 70s in the mountains to the lower and middle 90s across most other locations. Heat indices around 100 degrees are likely near the I-95 corridor toward the Bay. The heat and humidity will lead to an unstable atmosphere, but despite the upper-level low there will still be a capping inversion that will be tough to erode. A weak pressure trough along with terrain circulation/bay and river breezes should be enough to produce convection. However, coverage should be isolated due to that capping inversion. The heat and humidity will lead to moderate to high amounts of instability above the capping inversion. Therefore, an isolated stronger storm with gusty winds/heavy rainfall cannot be ruled out later this afternoon/evening. The upper-level low will gradually shift to our east tonight and high pressure over the Atlantic will continue to provide warm and humid conditions. Patchy fog is expected overnight and some fog may be locally dense. && .SHORT TERM /MONDAY THROUGH TUESDAY NIGHT/... The subtropical ridge over the southeastern CONUS will remain in place for Monday while high pressure remains over the Atlantic. More hot and humid conditions are expected along with sunshine. An unstable atmosphere may lead to an afternoon/evening shower or thunderstorm, but coverage should be isolated due to the a stronger capping inversion from the subtropical ridge. Warm and humid conditions will continue for Monday night with patchy fog. The subtropical ridge may break down a bit for Tuesday in response to an upper-level trough over the Midwest along with its associated cold front. More hot and humid conditions are expected due to high pressure over the Atlantic, and there may be a few afternoon and evening showers and thunderstorms. Coverage may be a bit more compared to Sunday/Monday due to the lower heights. The cold front will continue to approach from the west overnight Tuesday, more warm and humid conditions are expected ahead of the boundary with patchy fog. An isolated shower or thunderstorm cannot be completely ruled out overnight but coverage should wane with the loss of daytime heating. && .LONG TERM /WEDNESDAY THROUGH SATURDAY/... A cold front will approach from the west and move across later on Wednesday. The front stalls to our south through Friday while an upper level trough settles across the eastern CONUS. Several impulses of upper level energy will move across our area allowing for a chance of showers and thunderstorms each day. The trough will deepen into the weekend allowing for additional showers and thunderstorms. Temperatures will be warmer on Wednesday, with highs in the mid 80s to near 90 degrees across our area... High temperatures will ne in the 80s through the weekend. && .AVIATION /14Z SUNDAY THROUGH THURSDAY/... Early morning fog has dissipated and VFR conditions preside at the moment. For the remainder of today through Tuesday morning, an isolated shower or thunderstorm cannot be ruled out during the afternoon and evening hours each day but most places will be dry. Patchy fog is expected during the overnight and morning hours each day. An approaching cold front may bring a slight uptick in coverage of convection Tuesday afternoon/evening. Patchy fog is possible overnight Tuesday. Generally VFR conditions can be expected Wednesday into Thursday, however afternoon/evening showers and thunderstorms are possible each day due to a front. Some restrictions over the terminals are possible at times. && .MARINE... High pressure will remain over the Atlantic through Tuesday night. A southerly flow is expected during this time. The gradient may strengthen a bit for Monday night through Tuesday night and southerly channeling may cause southerly winds to approach SCA criteria during this time. However, confidence is low. An isolated shower/thunderstorm is possible during the afternoon and evening hours today and Monday. Scattered showers and thunderstorms are possible Tuesday afternoon/evening. Wind gusts will generally remain below SCA conditions Wednesday and Thursday as front moves across and stalls nearby. && .TIDES/COASTAL FLOODING... An increasing southerly flow will lead to elevated water levels Tuesday into Wednesday. Minor flooding is possible for sensitive areas but confidence remains low at this time. && .LWX WATCHES/WARNINGS/ADVISORIES... DC...None. MD...None. VA...None. WV...None. MARINE...None. && SYNOPSIS...BJL NEAR TERM...BJL SHORT TERM...BJL LONG TERM...IMR AVIATION...BJL/IMR MARINE...BJL/IMR TIDES/COASTAL FLOODING...BJL
Hazardous Weather Outlook National Weather Service Baltimore MD/Washington DC 502 AM EDT Sun Aug 5 2018 ANZ530>543-DCZ001-MDZ011-013-014-016>018-508-VAZ052>057-061000- 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- 502 AM EDT Sun Aug 5 2018 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...Today and Tonight No hazardous weather is expected at this time. .DAYS TWO THROUGH SEVEN...Monday through Saturday No hazardous weather is expected at this time. .SPOTTER INFORMATION STATEMENT... Spotter activation is not expected at this time. MDZ003>006-501>507-VAZ025>031-036>040-050-051-501>508-WVZ050>053- 055-501>506-061000- 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- 502 AM EDT Sun Aug 5 2018 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...Today and Tonight No hazardous weather is expected at this time. .DAYS TWO THROUGH SEVEN...Monday through Saturday No hazardous weather is expected at this time. .SPOTTER INFORMATION STATEMENT... Spotter activation is not expected at this time.
The national radar mosaic for the moment the first event began.
1 flood. Local standard time, as filed.
East Branch Loop was closed due to high water and associated debris.
After NWS Directive 10-1605, the rules offices file Storm Data by.
Every storm in Virginia in 2018Every state in 2018This day in weather historyWarnings in Virginia, August 2018
NOAA National Centers for Environmental Information, Storm Events Database, compiled from the National Weather Service’s monthly Storm Data. Complete through 2026-06; NCEI adds each month about 75 days after it ends and revises past years a few times a year. Rebuilt 2026-09-24. Each event’s entry at NCEI: 775619.