#dcwx — Public Fediverse posts

We'll finally get a stretch of storm-free days, starting today and continuing through Wednesday; temperatures will hold in the mid 80s with more reasonable humidity levels, topping out in the 50s to around 60 for dew points. Enjoy! #VAwx #MDwx #DCwx

Noticeably cooler today with highs topping out around 78-80 in most places across #Virginia and #Maryland; showers/storms should stay well south and west of Richmond. Severe weather not expected. #VAwx #MDwx #DCwx

LWX cancels Tornado Watch for 7 forecast zones in [AN]

https://mesonet.agron.iastate.edu/vtec/f/2026-O-CAN-KLWX-TO-A-0605_2026-08-21T00:37Z

#dcwx #mdwx #vawx

LWX issues Tornado Warning [tornado: RADAR INDICATED, hail: 0.00 IN] for St. Marys [MD] till 7:45 PM EDT * At 708 PM EDT, a severe thunderstorm capable of producing a tornado was located near Lexington Park, moving east at 35 mph.

https://mesonet.agron.iastate.edu/vtec/f/2026-O-NEW-KLWX-TO-W-0047_2026-08-20T23:08Z

#dcwx #mdwx #vawx

LWX continues Tornado Warning [tornado: RADAR INDICATED, hail: <.75 IN] for St. Marys [MD] till 7:30 PM EDT At 706 PM EDT, a severe thunderstorm capable of producing a tornado was located near California, or near Lexington Park, moving east at 40 mph.

https://mesonet.agron.iastate.edu/vtec/f/2026-O-CON-KLWX-TO-W-0046_2026-08-20T23:06Z

#dcwx #mdwx #vawx

LWX continues Tornado Watch for 7 forecast zones in [AN] till Aug 20, 10:00 PM EDT

https://mesonet.agron.iastate.edu/vtec/f/2026-O-CON-KLWX-TO-A-0605_2026-08-20T22:29Z

#dcwx #mdwx #vawx

#SevereWeather #DCwx #DEwx #MDwx #NJwx #PAwx #VAwx

URGENT - IMMEDIATE BROADCAST REQUESTED
Tornado Watch Number 605
NWS Storm Prediction Center Norman OK
255 PM EDT Thu Aug 20 2026

The NWS Storm Prediction Center has issued a

* Tornado Watch for portions of
District Of Columbia
Delaware
Central and Eastern Maryland
Central and Southern New Jersey
Southeast Pennsylvania
Northern Virginia
Coastal Waters

* Effective this Thursday afternoon and evening from 255 PM until
1000 PM EDT.

* Primary threats include...
A couple tornadoes possible
Scattered damaging winds likely with isolated significant gusts
to 75 mph possible
Isolated large hail events to 1.5 inches in diameter possible

SUMMARY...Scattered severe thunderstorms are forecast to continue to
develop and intensify through the afternoon and into the evening. A
few of the stronger storms will be supercells capable of a risk for
tornadoes, damaging gusts, and large hail. A consolidation of
storms will probably occur during the evening as one or two line
segments develops with an attendant risk for damaging winds and
possibly a tornado.

The tornado watch area is approximately along and 70 statute miles
north and south of a line from 15 miles southwest of Washington DC
to 45 miles east northeast of Dover DE. For a complete depiction of
the watch see the associated watch outline update (WOUS64 KWNS
WOU5).

@DismalManorGang

#RyanHall #SevereWeather #MDwx #PAwx #NJwx #DEwx #DCwx #Tornado

From Ryan Hall Y’all on FB: SPC just upgraded the tornado wording on today's outlook for Maryland, Delaware, and New Jersey. They've now added the significant tornado flag, which means a strong, long-track tornado is on the table this afternoon and evening, not just a brief spin-up along a line of storms.

Philadelphia, Washington DC, and Baltimore are the cities sitting closest to the bullseye. Baltimore's best window for storms runs 1 to 9 PM, with activity likely busiest around 3 PM. The overall risk category didn't change, but this kind of same-day upgrade is SPC's way of saying the setup got a little more serious than it looked this morning. Good day to make sure your phone can get you a warning if one gets issued near you.
@DismalManorGang

Rain chances will start to increase later this week, starting Thursday and ramping up Friday and Saturday; looks like some cooler overnight temperatures arrive west of I-95 this weekend (low 60s, maybe some upper 50s!). #VAwx #MDwx #DCwx

Severe thunderstorm watch for north and northwestern #Virginia this evening until 11pm, and a flood watch in effect for the #DC area. Watching another round of storms crossing the Appalachians into the mid/upper portion of the Shenandoah Valley and far western #Maryland. #VAwx #MDwx #DCwx

Light to moderate showers this morning across the Shenandoah Valley into western #Maryland, moving slowly east; I think some of these will fizzle out as they cross the Blue Ridge and Skyline Drive.

Still a risk for scattered strong storms late afternoon/evening. #VAwx #MDwx #DCwx

#DCwx #MDwx #VAwx

From NWS Baltimore / Washington on FB: Multiple rounds of showers and thunderstorms are expected through tonight. Flood Watches are in effect where the threat of flooding is currently highest over the next several hours, but these may need to be expanded in area/extended in time.
@DismalManorGang

Another hot and humid one today, with scattered late day storms, mostly across the western Piedmont but a few could reach the I-95 corridor. We’re returning to a more typical summer pattern….temperatures holding steady in the low to mid 90s with maybe a 20-30% chance of late day storms. #VAwx #MDwx #DCwx #RVA

High end sunset. #dcwx

Looks like any showers/storms tomorrow will be confined to areas south of Richmond, VA; Wednesday is also looking pretty quiet and dry; temperatures will continue hovering in the mid 80s the rest of the week, no sign of any major heat waves at the moment. #VAwx #MDwx #DCwx

Mood clouds. #dcwx

#DCwx #MDwx #VAwx

From NWS Baltimore/Washington on FB: Temperatures begin to increase through this weekend with highs rising to near 90s in urban areas on Saturday. High pressure persists throughout the region, bringing clear skies and relatively light winds tomorrow. Saturday, southerly winds bring increasing chances for showers and thunderstorms later in the afternoon or evening.

Stay safe today, could be a high power outage event with today’s storms. I’ll do my best to post updates but there’s a chance storms today will get going earlier than usual and I don’t get home from work until 5:30 so apologies in advance if I can’t get to it until then. FYI, Baron Critical Weather and Wunderground both have good radar features. #VAwx #MDwx #DCwx

LWX continues Marine Warning [wind: >34 KTS, hail: 0.00 IN] for Chesapeake Bay from Drum Point MD to Smith Point VA, Chesapeake Bay from North Beach to Drum Point MD, 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 [AN] till 5:30 PM EDT

https://mesonet.agron.iastate.edu/vtec/f/2026-O-CON-KLWX-MA-W-0168_2026-07-22T20:59Z

#dcwx #mdwx #vawx

LWX continues Tornado Warning [tornado: RADAR INDICATED, hail: <.75 IN] for Pendleton [WV] till 7:45 PM EDT At 735 PM EDT, a severe thunderstorm capable of producing a tornado was located 8 miles east of Upper Tract, or 9 miles south of Rough Run, moving east at 50 mph.

https://mesonet.agron.iastate.edu/vtec/f/2026-O-CON-KLWX-TO-W-0022_2026-07-21T23:36Z

#dcwx #mdwx #vawx

#DCwx #MDwx #VAwx

Area Forecast Discussion
National Weather Service Baltimore MD/Washington DC
408 AM EDT Tue Jul 21 2026

WHAT HAS CHANGED

Severe weather probabilities have increased Wednesday for the I-95 corridor, though much uncertainty remains. Small Craft Advisories were extended into Wednesday for portions of the waters. The overall message for today`s severe weather remains the same, with specifics depending on mesoscale evolution.

KEY MESSAGES

- 1) Strong to severe thunderstorms are likely today, with some thunderstorm risk lingering into Wednesday.

- 2) Below average temps Thursday through the weekend with only small rain chances.

DISCUSSION

KEY MESSAGE 1...Strong to severe thunderstorms are likely today, with some thunderstorm risk lingering into Wednesday.

Higher dew points have been advecting into the area with moisture and instability increasing in S/SW flow. So far shower activity has been isolated and short lived. However, a subtle shortwave is approaching, and some of the convection currently across WV and SW VA could persist or redevelop across the area through the early morning hours. Areas of stratus are also forming. Both of these features could inhibit surface heating this morning, although it does appear we should have some partial sun by midday as the warm front continues to lift to the north. This should be enough to allow temperatures to rise into the mid 80s to lower 90s. Combined with dew points in the 70s, at least moderate surface based instability should develop, highest east of the Blue Ridge Mountains.

A seasonably strong trough will be approaching from the west, providing forcing and anywhere between 30 and 50 kt of flow in the cloud bearing layer. This will provide a favorable environment for severe thunderstorms, with supercells and clusters both possible. One initiation region will likely be along the prefrontal/lee trough near or just east of the Blue Ridge. These storms will likely affect the I-95 corridor between mid afternoon and early evening. While these storms will certainly carry severe potential, it is interesting to note on average the 850-700 mb wind fields will be greater to our south and west until late afternoon or early evening. Other details remain unresolved, especially the effects of upstream convection that moved through the upper Great Lakes and mid Mississippi Valley. This could have some impact on how thunderstorms develop across the Ohio Valley this afternoon and what subsequently moves into western areas. If stronger/more widespread convection does not move in from the Ohio Valley, there is some potential there is a relative minimum in coverage between the Blue Ridge and Alleghenies.

The coverage of afternoon storms and upstream effects will determine what happens this evening as the strongest forcing overspread the area along with increasing low level wind fields. A second round of showers and thunderstorms will be possible for some areas, though increasing low level stability may limit the severe weather threat. It appears the evening/overnight coverage could gradually shift to southern parts of the forecast area, or even mostly to our south, potentially focusing on outflow from earlier activity…

Patuxent River NAS [St. Marys Co, MD] ASOS reports Marine Tstm Wind of 39.00 mph at 4:08 PM EDT -- A thunderstorm produced an estimated wind gust to 34 knots (39 MPH) near the ASOS at Patuxent River Naval Air Station (KNHK) adjacent to the Chesapeake Bay and tidal Patuxent River.

https://mesonet.agron.iastate.edu/lsr/?by=wfo&wfo=LWX&sts=202607182008&ets=202607182008

#dcwx #mdwx #vawx

Winchester [Frederick Co, VA] 911 Call Center reports Tstm Wnd Dmg at 1:42 PM EDT -- Several reports of trees down on both Jones Road and Middle Road.

https://mesonet.agron.iastate.edu/lsr/?by=wfo&wfo=LWX&sts=202607181742&ets=202607181742

#dcwx #mdwx #vawx

LWX issues Marine Warning [wind: >34 KTS, hail: 0.00 IN] for Tidal Potomac from Cobb Island MD to Smith Point VA, Tidal Potomac from Indian Head to Cobb Island MD [AN] till 6:30 PM EDT

https://mesonet.agron.iastate.edu/vtec/f/2026-O-NEW-KLWX-MA-W-0151_2026-07-18T21:35Z

#dcwx #mdwx #vawx

LWX continues Severe Thunderstorm Warning [tornado: POSSIBLE, wind: 60 MPH (RADAR INDICATED), hail: 1.00 IN (RADAR INDICATED)] for Carroll, Frederick [MD] till 3:15 PM EDT

https://mesonet.agron.iastate.edu/vtec/f/2026-O-CON-KLWX-SV-W-0265_2026-07-18T18:57Z

#dcwx #mdwx #vawx

LWX updates Severe Thunderstorm Warning [wind: 60 MPH (RADAR INDICATED), hail: <.75 IN (RADAR INDICATED)] (cancels Greene, Madison [VA], continues Albemarle, City of Charlottesville, Orange [VA]) till 3:00 PM EDT.

https://mesonet.agron.iastate.edu/vtec/f/2026-O-CON-KLWX-SV-W-0263_2026-07-18T18:45Z

#dcwx #mdwx #vawx

Flood watch in effect now from Lorton and Alexandria to Leesburg, Washington DC, east to Annapolis, and north to Frederick and Baltimore. #MDwx #DCwx #VAwx

CODE PURPLE

DC: Code Purple: Notice of Very Unhealthy Air

"The Metropolitan Washington Council of Governments (COG) has issued a Code Purple Air Quality Health Advisory in the metropolitan Washington region on July 17. Current air quality conditions have reached Code Purple, very unhealthy for everyone. Smoke coming from wildfires in Canada is contributing to the increased levels of fine particle pollution.

Sensitive groups like people with heart or lung disease like asthma or emphysema, older adults, and children should avoid all physical activity outdoors.
Healthy individuals should avoid long or intense outdoor activities.
"

https://www.mwcog.org/newsroom/2026/07/17/code-purple-notice-of-very-unhealthy-air-air-quality/

#DCwx #aqi #smoke #wildfires

El humo no será tan malo en #Virginia mañana, pero lo más probable es que aún se note; el domingo será el mejor día para volver a salir.
Hay un ligero riesgo de tormentas severas mañana por la tarde/noche al sur y suroeste de D.C., pero un mayor riesgo para D.C. y Baltimore y el este de #Maryland. Las tormentas estarán ampliamente dispersas, por lo que no todo el mundo verá un clima tormentoso. #VAwx #MDwx #DCwx

Smoke won’t be as bad in #Virginia tomorrow but still noticeable most likely; Sunday will be the better day to get back outside.

There is a slight risk of severe storms tomorrow afternoon/evening south and southwest of D.C., but an enhanced risk for D.C. and Baltimore and eastern #Maryland. Storms will be widely scattered so not everyone will see stormy weather. #VAwx #MDwx #DCwx