An isolated thunderstorm produced localized damaging wind gusts over portions of western Maryland.
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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 thunderstorm produced localized damaging wind gusts over portions of western Maryland.
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 May 25, 2:11 PM EST, 3 hours 30 minutes earlier.
Area Forecast Discussion National Weather Service Baltimore MD/Washington DC 311 PM EDT Sat May 25 2024 .SYNOPSIS... A front will waver mainly north of the area through Sunday. Eventually, a much stronger cold front pushes through the region Monday night. A secondary cold front moves in by mid-week before high pressure builds in late next week. && .NEAR TERM /THROUGH TONIGHT/... A few showers and storms have been developing due to terrain circulations and lee troughing this afternoon in the mountains, but the greater threat appears to be after 5 PM. More numerous storms are occurring across western Pennsylvania in association with a subtle shortwave trough and an approaching front, and these may expand southward with time. Instability, shear, and lapse rates are all on the modest end of the spectrum, but a few instances of wind damage and hail can't be ruled out with more organized structures. Any storms that become locked to the terrain or train briefly due to weak wind fields could pose an isolated flood threat to vulnerable areas. There is some uncertainty on whether storms will survive east of the Blue Ridge this evening, but even if they do they will likely be in a weakening state. Some CAMs hint a second round of storms could drop into the highlands this evening before dissipating. Some showers could also linger near the Chesapeake Bay until the early morning hours. Warm and muggy temperatures in the mid to upper 80s this afternoon will drop back into the upper 50s and 60s tonight. Patchy fog is possible, especially places that receive rain, although lingering cloud cover may be a limiting factor. && .SHORT TERM /SUNDAY THROUGH MONDAY NIGHT/... Should the front from the north dip into the area briefly, it will likely develop back northward on Sunday. Shortwave ridging may tend to suppress convection through much of the day. However, a warm and moist airmass will lead to increasing instability and weakening inhibition by afternoon. Thunderstorms appear most likely to develop due to terrain circulations, and heights will be gradually lowering in the mountains as the afternoon progresses. Isolated showers and storms may form due to bay breeze interactions as well. Weak shear will likely limit an organized severe threat, but those weak wind fields may also result in slow moving storms over the mountains and an isolated flood threat. A shortwave trough approaching from the west may bring a better chance for thunderstorms Sunday evening into Sunday night/Monday morning, potentially in multiple rounds. This activity could be tied to severe storms that form across the Ohio Valley during the day, but it appears unlikely they would maintain their strength crossing the mountains. Longwave troughing progresses eastward Monday/Memorial Day, providing forcing and steepening mid level lapse rates for deep convection. Instability and shear will support a severe weather threat, and low level wind fields could increase enough for a tornado threat as well. However, there are multiple complicating factors including potential low clouds and/or remnant convection affecting the area during the morning, and high level clouds that persist into the afternoon. However, strong forcing and strong late May insolation will still support a thunderstorm threat; the main questions involve coverage, timing, and severity. Storms likely move to the east during the evening, with the cold front likely pushing east of the area by Tuesday morning. && .LONG TERM /TUESDAY THROUGH SATURDAY/... Broad cyclonic flow aloft will set up from the Great Lakes and southern Ontario over to the northeastern U.S through late in the week. The presence of lower heights aloft and mainly west to northwesterly low-level flow will make for a cooler period, accompanied by decreasing humidity levels. With some embedded shortwaves racing through the area, showers and isolated thunderstorms are in the forecast through Wednesday. Cooler air becomes more noticeable by mid-week behind a secondary cold front. Behind this system is where dew points really begin to plummet as values fall into the mid/upper 40s for Thursday and Friday. While it may be the end of May, it sure will not feel like it based on high temperatures in the low/mid 70s and the mentioned lower humidity. Up in the mountains, expect 60s for highs. The arrival of surface high pressure will also afford mostly sunny skies each day to finish out the work week. Light winds and clear skies at night should yield some decent radiational cooling effects. Areas west of the Blue Ridge could see widespread mid/upper 40s, with even a few upper 30s along the Allegheny ridgetops. Looking into the start of next weekend which marks the beginning of June and Meteorological Summer, building heights aloft should allow for warmer conditions. Forecast high temperatures return to the 80 degree mark in many areas. Ensemble temperature spread becomes notable at this point with a number of members favoring closer to the low/mid 80s. Thus, the forecast could go up during subsequent packages. && .AVIATION /19Z SATURDAY THROUGH THURSDAY/... Isolated thunderstorms have developed near MRB and CHO already, although there may be a brief pause until additional storms move in from the west during the late afternoon/early evening. There is enough of a signal of storms continuing eastward that a VCTS has been added to IAD/DCA, but with rapid weakening, thunder appears less probable as far east as BWI/MTN. Fog may develop late tonight, especially in areas where it rains, although clouds could be a limiting factor. It's also possible low clouds push in from the east, affecting MTN/BWI. Shower and storm coverage is expected to be sparse most of Sunday with weak high pressure. A better chance of thunderstorms may arrive Sunday evening or Sunday night. Sub-VFR ceilings may also develop, especially at BWI/MTN Sunday night into Monday morning. Thunderstorms are likely Monday afternoon and/or evening and could be severe. However there are some uncertainties in timing and coverage. Behind the strong cold front pushing through during Memorial Day, winds on Tuesday and Wednesday will largely be out of the west. A secondary frontal system moves in mid-week allowing for a shift to northwesterly winds by as early as Wednesday afternoon. Expect afternoon gusts up to 15 knots, perhaps even up to 20 knots at times. While conditions should mainly be VFR, the threat for showers and isolated thunderstorms could lead to occasional restrictions. Dry weather returns for Thursday with VFR conditions and lighter northwesterly winds. && .MARINE... Winds should remain below SCA criteria through Sunday. Southerly channeling could lead to marginal SCA conditions on the bay Sunday night. Isolated t-storms are possible this evening and again late Sunday into early Monday morning. Thunderstorms are likely on Memorial Day during the afternoon and evening, some of which are likely to be severe and require SMWs. SCAs are likely Monday through Monday night as southerly flow increases ahead of an approaching front. Any convective threat from the day before should be over by Tuesday morning. Sub-advisory levels westerly winds are expected through Wednesday afternoon before turning northwesterly behind a secondary front. Any surge of winds with this system should wait until the following day. && .TIDES/COASTAL FLOODING... Water levels are expected to gradually rise this weekend given south to southeasterly winds. Many tidal sites see their higher of the two high tides reach Action stage. Further increases are likely into Monday/Memorial Day which could lead to some minor coastal flooding. && .LWX WATCHES/WARNINGS/ADVISORIES... DC...None. MD...None. VA...None. WV...None. MARINE...None. && SYNOPSIS...ADS NEAR TERM...ADS SHORT TERM...ADS LONG TERM...BRO AVIATION...ADS/BRO MARINE...ADS/BRO TIDES/COASTAL FLOODING...LWX
Hazardous Weather Outlook National Weather Service Baltimore MD/Washington DC 406 PM EDT Sat May 25 2024 ANZ530>543-DCZ001-MDZ008-011-013-014-016>018-504-506-508- VAZ053>057-527-261000- 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- 406 PM EDT Sat May 25 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 No hazardous weather is expected at this time. .DAYS TWO THROUGH SEVEN...Sunday through Friday There is a potential for severe storms capable of producing considerable wind damage, large hail, and the threat for an isolated tornado Monday afternoon and evening. Heavy rain from thunderstorms may lead to isolated instances of flooding Monday afternoon and evening. .SPOTTER INFORMATION STATEMENT... Spotter activation will likely be needed Memorial Day. MDZ003>006-503-505-507-VAZ025>031-036>040-050-051-501-502-505>508- 526-WVZ050>053-055-261000- 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- 406 PM EDT Sat May 25 2024 This Hazardous Weather Outlook is for portions of eastern West Virginia, northern and central Virginia, and central and western Maryland. .DAY ONE...Tonight An isolated severe thunderstorm with damaging winds and large hail is possible this evening. An isolated instance of flooding is also possible, especially west of the Blue Ridge Mountains. .DAYS TWO THROUGH SEVEN...Sunday through Friday There is a potential for severe storms capable of producing considerable wind damage, large hail, and the threat for an isolated tornado Monday afternoon and evening. Heavy rain from thunderstorms may lead to isolated instances of flooding Monday afternoon and evening. .SPOTTER INFORMATION STATEMENT... Spotter activation will likely be needed Memorial Day. MDZ001-501-502-VAZ503-504-WVZ501>506-261000- Garrett-Extreme Western Allegany-Central and Eastern Allegany- Western Highland-Eastern Highland-Western Grant-Eastern Grant- Western Mineral-Eastern Mineral-Western Pendleton- Eastern Pendleton- 406 PM EDT Sat May 25 2024 This Hazardous Weather Outlook is for the Allegheny Front counties in western Maryland, eastern West Virginia, and Highland County Virginia. .DAY ONE...Tonight An isolated severe thunderstorm with damaging winds and large hail is possible this evening. An isolated instance of flooding is also possible. .DAYS TWO THROUGH SEVEN...Sunday through Friday There is a potential for severe storms capable of producing considerable wind damage, large hail, and the threat for an isolated tornado Monday afternoon and evening. Heavy rain from thunderstorms may lead to isolated instances of flooding Monday afternoon. .SPOTTER INFORMATION STATEMENT... Spotter activation will likely be needed Memorial Day.
The Sterling radar (KLWX), 85 km away, was scanning. The volume nearest the first event began at 22:41 UTC.
2 thunderstorm wind. Local standard time, as filed.
Numerous trees blew down in and around Clear Spring.
Two trees blew down blocking Fountain Road near Gordon Circle.
After NWS Directive 10-1605, the rules offices file Storm Data by.
Every storm in Maryland in 2024Every state in 2024This day in weather historyWarnings in Maryland, May 2024
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: 1171600, 1171601.