An isolated thunderstorm produced localized wind damage over northeastern Maryland.
Every event with a place to put it. Tap one for its entry below.
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 wind damage over northeastern 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 Jun 25, 8:49 AM EST, 5 hours 6 minutes earlier.
Area Forecast Discussion National Weather Service Baltimore MD/Washington DC 949 AM EDT Sun Jun 25 2023 .SYNOPSIS... Widely scattered showers and thunderstorms look to linger through today with a weakening frontal boundary sitting east of the I-95 corridor. A stronger cold front will approach from the west Monday into Tuesday. Decreasing shower and thunderstorm chances are expected by the middle to end of the week. && .NEAR TERM /THROUGH TONIGHT/... The upper-level low that has impacted our weather the last several days continues to weaken and it will gradually move away from the area this afternoon into this evening. Weak upper-level ridging is expected to build in during this time behind the departing system and ahead of a stronger closed low over the Great Lakes. More sunshine and increased subsidence will allow for a hotter afternoon with max temps in the mid 80s to near 90 for most locations (70s in the mountains). Humidity will remain high and when combined with the hotter afternoon this will cause some instability to develop. High-resolution models depict less convective coverage, likely owing to some subsidence with weak upper-level ridging approaching during peak heating. Consequently, the forecast calls for isolated to widely scattered showers and thunderstorms. The more pulse-like nature to these cells should keep them on the disorganized side. For to night, a line of widespread showers and thunderstorms will approach from the west this evening, and it will weaken as it moves into our area overnight. However, there appears to be enough instability (falling heights and mid-level moisture advection) for a few showers and storms to make it into our area associated with the line, and even ahead of the line. Overall, the coverage is most likely to be scattered for most areas (perhaps numerous near the Allegheny Highlands). Shear profiles should remain weak, and instability marginal, so the severe threat appears to be low. However, some gusty winds and small hail are possible. Lows tonight will be in the mid 60s to low 70s for most areas. && .SHORT TERM /MONDAY THROUGH TUESDAY NIGHT/... After a lackluster start to the severe weather season, things quickly begin to change as a robust upper trough sweeps through the Ohio Valley to Mid-Atlantic. Presently, the upper low is situated over the Upper Midwest while eventually racing toward the east-southeast during the next 12 to 36 hours. With warm sector temperatures rising into the upper 80s/low 90s and dew points reaching the low 70s, ample instability will be available for convective development. Depending on the forecast model, surface-based instability nears 3,000 J/kg, accompanied by unusually steep mid-level lapse rates. With such lapse rates into the 7 to 8 C/km range, there is an increasing threat for large hail, especially from the D.C. metro southward. Additionally, large downdraft CAPE values are evident in forecast soundings which supports damaging to locally destructive winds. The latest model suites favor early afternoon convective initiation over the terrain as well as along a well established lee trough. Seasonably high CAPE values should allow rather quick development of updrafts. Within a couple hours after initiation, high-resolution models favor upscale growth into a eastward propagating squall line. The Storm Prediction Center has placed areas east of I-81 in a Slight risk for severe thunderstorms, with an Enhanced risk grazing Spotsylvania and King George counties. Depending on how subsequent models and observational data indicate, some expansion of these threat areas are possible. With an above average precipitable water air mass advecting into the region, there will be some threat for flash flooding. The cold pool driven thunderstorm activity should keep convection on the move. However, a quick inch or two is possible within many of these storms. A Slight risk continues from the Blue Ridge eastward, but especially over the DC to Baltimore urban sprawl. As the cold front does not arrive until late Monday into early Tuesday morning, some of these thunderstorms may linger into the overnight hours. Nighttime low temperatures will range from the 60s to low 70s. Depending on how quickly the cold front exits the area, unsettled conditions likely persist into Tuesday. This is particularly in response to the slow moving nature of the upper low. Within the modified post-frontal environment, temperatures do fall back into the low 80s for Tuesday, albeit with continued storm chances. A gradual drying trend is shown into Tuesday night with lows falling into the low/mid 60s. && .LONG TERM /WEDNESDAY THROUGH SATURDAY/... Low pressure will bring a chance for a few showers to our northern zones Wednesday before the low pulls away into New England Wednesday night. Highs will be a couple of degrees below average. Dry conditions will filter in Wednesday night through Friday morning. Highs on Thursday will be below average again. A chance for showers and thunderstorms returns Friday afternoon and lingers into the day on Saturday. Highs on Friday will rise to above average numbers, as well Saturday. && .AVIATION /14Z SUNDAY THROUGH THURSDAY/... VFR conditions expected most of the time today. Convective coverage should be sparser than yesterday given weakening of the upper low. Have placed a VCSH group for all terminals during the mid afternoon to early evening hours. While Monday morning should bring VFR conditions, restrictions are likely at all locations given the threat for severe thunderstorms. A squall line is expected to track eastward through the area which would lead to the potential for IFR ceilings/visibility, very gusty and erratic winds, frequent lightning, and even some large hail for the more southern terminals. Otherwise, the background winds remain out of the south with gusts up to 20 knots. Additionally, unsettled conditions are likely into Tuesday which would support additional restrictions. Winds turn more west-southwesterly, but lighter than the previous day. VFR conditions are more probable at the CHO and DCA terminals Wednesday, while the other terminals could encounter MVFR conditions. Winds west around 10 knots. VFR conditions return for all terminals Wednesday night through Thursday night. Winds becoming more northwest 5 to 10 knots Wednesday night through Thursday night. && .MARINE... Sub-advisory marine winds are in place through Monday morning. Ahead of a strong frontal system, expect an uptick in southerly winds which may lead to some channeling effects. Consequently, Small Craft Advisories may be needed by midday Monday, while continuing through the day. Given the potential for an eastward propagating squall line, Special Marine Warnings become likely by the late afternoon to evening hours. Some of the stronger storms may produce some large hail as well. A cold front moves through early Tuesday with an additional threat for Special Marine Warnings as convection persists with the upper low. No marine hazards expected Wednesday through Thursday night. Winds mainly west around 10 to 15 knots Wednesday. Winds becoming northwest 5 to 10 knots Wednesday night through Thursday night. && .TIDES/COASTAL FLOODING... Elevated water levels will continue in the coming days, but there is a better chance for action stage vs. minor flooding. Anomalies likely rise again on Monday in deep southerly flow ahead of a strong cold front, which could bring areas close to minor once again. && .EQUIPMENT... KLWX will be down for approximately ten days for an important upgrade. Technicians will refurbish and replace the pedestal, one of the most critical components of the radar, which is necessary for antenna rotation and positioning to capture data in all directions. The components are extremely heavy and will require the radome to be removed by crane and replaced when the work is completed. Estimated return to service is June 30th, barring any unexpected issues. During the downtime, adjacent radars will be available, including: Wakefield, VA (KAKQ), Roanoke, VA (KFCX), Dover, DE (KDOX), Charleston, WV (KRLX), Pittsburgh, PA (KPBZ), State College, PA (KCCX), and Fort Dix, NJ (KDIX)...also FAA Terminal Doppler radars for Dulles (TIAD), Reagan National (TDCA), Thurgood Marshall BWI (TBWI), and Joint Base Andrews (TADW). For direct access to any of these surrounding radar sites, visit the following Web page: https:/radar.weather.gov/ && .LWX WATCHES/WARNINGS/ADVISORIES... DC...None. MD...None. VA...None. WV...None. MARINE...None. && SYNOPSIS...BRO NEAR TERM...BJL/BRO SHORT TERM...BRO LONG TERM...KLW AVIATION...BJL/BRO/KLW MARINE...BJL/BRO/KLW TIDES/COASTAL FLOODING...CJL EQUIPMENT...LWX
Hazardous Weather Outlook National Weather Service Baltimore MD/Washington DC 200 PM EDT Sun Jun 25 2023 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- 200 PM EDT Sun Jun 25 2023 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...This Afternoon and Tonight No hazardous weather is expected at this time. .DAYS TWO THROUGH SEVEN...Monday through Saturday Scattered severe thunderstorms are possible Monday afternoon and evening. Damaging wind gusts and large hail are the primary threats along with the possibility of a tornado. Isolated severe storms are possible Tuesday afternoon and evening as well. Additionally, there is a threat for flash flooding across the entire outlook area on Monday afternoon and evening. .SPOTTER INFORMATION STATEMENT... Spotter activation will likely be needed Monday afternoon and evening. 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- 200 PM EDT Sun Jun 25 2023 This Hazardous Weather Outlook is for portions of eastern West Virginia, northern and central Virginia, and central and western Maryland. .DAY ONE...This Afternoon and Tonight No hazardous weather is expected at this time. .DAYS TWO THROUGH SEVEN...Monday through Saturday Scattered severe thunderstorms are possible Monday afternoon and evening. Damaging wind gusts and large hail are the primary threats along with the possibility of a tornado. Additionally, there is a threat for flash flooding, especially east of the Blue Ridge Mountains Monday afternoon and evening. .SPOTTER INFORMATION STATEMENT... Spotter activation will likely be needed Monday afternoon and evening. 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- 200 PM EDT Sun Jun 25 2023 This Hazardous Weather Outlook is for the Allegheny Front counties in western Maryland, eastern West Virginia, and Highland County Virginia. .DAY ONE...This Afternoon and Tonight No hazardous weather is expected at this time. .DAYS TWO THROUGH SEVEN...Monday through Saturday Isolated severe thunderstorms are possible Monday afternoon and evening. Damaging wind gusts and large hail are the primary threats. .SPOTTER INFORMATION STATEMENT... Spotter activation may be needed Monday afternoon and evening.
The Dover AFB radar (KDOX), 107 km away, was scanning. The volume nearest the first event began at 18:56 UTC.
2 thunderstorm wind. Local standard time, as filed.
Multiple trees blew down along MD-161 Darlington Road between Moxley Road and Harmony Church Road.
Multiple trees blew down blocking MD-222 North Main Street in Port Deposit near Rock Run Marina.
After NWS Directive 10-1605, the rules offices file Storm Data by.
Every storm in Maryland in 2023Every state in 2023This day in weather historyWarnings in Maryland, June 2023
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: 1097277, 1097278.