A few thunderstorms produced localized wind damage along a stalling cold front.
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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.
A few thunderstorms produced localized wind damage along a stalling cold front.
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 Jul 17, 2:10 PM EST, 3 hours 6 minutes earlier.
Area Forecast Discussion National Weather Service Baltimore MD/Washington DC 310 PM EDT Sun Jul 17 2022 .SYNOPSIS... A southerly flow will persist across the local region with heat, humidity, and diurnal showers and thunderstorms. As low pressure moves across the Ohio Valley on Monday, a cold front will move through the local region. High pressure will return thereafter. A stronger cold front will push through Thursday, with hot and humid conditions expected ahead of it. && .NEAR TERM /UNTIL 6 AM MONDAY MORNING/... Additional heat and humidity this afternoon and upper level disturbances from the west have allowed for the environment for additional showers and thunderstorms to develop this afternoon and should continue into this evening. Mid-level lapse rates between 6 and 6.5 degC/km, CAPE of 2000-3500 J/kg, 0-3km Bulk Shear around 15 kts, and PWATS of 2 inches are all indicators for strong to severe thunderstorms later this afternoon and early evening. Most of the current activity will remain between the Appalachian Mountains and the Blue Ridge Mountains. Additional pop up showers and storms will be possible closer to the metro areas by late this afternoon. The main threats will be damaging winds, large hail and isolated instances of flooding. Convection could persist into the overnight hours with the more significant activity waning with loss of instability and limited shear. && .SHORT TERM /6 AM MONDAY MORNING THROUGH TUESDAY NIGHT/... More showers and thunderstorms are likely Monday as the parent trough becomes cut-off in the middle levels. While the greater dynamics remain displaced over PA/NY, showers and thunderstorms are still likely locally. Steeper low- level lapse rates coupled with a couple thousand J/kg of SBCAPE and incoming height falls likely result in more widespread convection, which could be organized given the increase in deep- layer shear. Best chance for higher QPF appears north of I-70 towards the Mason Dixon over northeast MD. Some lingering showers/thunderstorms may persist Monday night before subsidence takes over into Tuesday as the wave continues progressing to the north and east. Westerly flow will downslope Tuesday leading to continued dry conditions aside from the far southern parts of the CWA where a shower/storm is possible. Temperatures will remain near seasonable norms, with upper 80s to near 90. The favored downslope locations could reach the low to mid 90s Tuesday. && .LONG TERM /WEDNESDAY THROUGH SUNDAY/... Heat and humidity will start to build into the area in earnest on Wednesday, with temperatures climbing well into the 90s, and dewpoints holding in the upper 60s and lower 70s. Skies are expected to remain mostly sunny, with a remnant elevated mixed layer moving in and providing a cap. The forecast will become more interesting on Thursday as a potent shortwave and associated area of low pressure track across southern Canada. This system will drive a cold front southeastward toward the area, which along with ascent ahead of the shortwave will provide lift necessary for the initiation of storms. Compared to yesterday, the system looks a bit more progressive, so it's possible that storms will be confined to eastern portions of the forecast area. If the system were to speed up even more, much of the activity could even miss us. If storms do form, the environment is concerning. Temperatures will again climb well into the 90s, with dewpoints holding in the lower 70s, which will provide strong instability. With the wave passing to the north, decent flow will also be in place through a deep layer (around 30-40 knots of shear). We'll continue to keep an eye on this system and its associated severe thunderstorm potential over the coming days. Drier and slightly cooler air will filter into the area in the wake of the front on Friday. This drier and slightly cooler air will help to suppress convection and keep conditions dry. This stretch of drier weather may continue into Saturday as ridging starts to build east from the center of the country. && .AVIATION /19Z SUNDAY THROUGH FRIDAY/... Showers and a few strong to severe thunderstorms near CHO, MRB, and IAD later this afternoon into early this evening could lead to brief MVFR or IFR conditions. Best timeframe for MRB and CHO will be 19z and 22z with a timeframe of 20z to 00z possible for IAD. Otherwise, VFR conditions into tonight. The main threat will be damaging winds and heavy downpours. Patchy fog could occur at terminals that receive a good deal of rain this afternoon but very little rainfall overnight. Winds will be generally light with gusts 10 to 15 knots, except for in thunderstorms. Showers/thunderstorms expected areawide for Monday afternoon/evening. A few could be strong to severe as well, especially for the terminals to the north. Prevailing VFR conditions and southerly winds are expected both Wednesday and Thursday at the terminals. Thunderstorms appear possible Thursday afternoon, some of which may be strong. && .MARINE... Winds will remain southerly through Monday, except for gusty and variable in thunderstorms. Special Marine Warnings may be needed for any stronger storms. Better chances this afternoon across the northern tidal Potomac and the Chesapeake Bay north of the Bay Bridge. More widespread showers/thunderstorms likely Monday. Increasing southerly winds could lead to marginal SCA conditions on portions of the waters Sunday night into Monday. Winds may approach SCA levels in southerly flow on both Wednesday and Thursday. Thunderstorms, some of which may be strong, may impact the waters Thursday. && .TIDES/COASTAL FLOODING... Tidal anomalies will be on the increase as southerly flow continues through Monday. This may lead to more sensitive locations reaching action stage, but no flooding is expected at this time. && .LWX WATCHES/WARNINGS/ADVISORIES... DC...None. MD...None. VA...None. WV...None. MARINE...None. && SYNOPSIS...CPB NEAR TERM...KLW/CPB SHORT TERM...KLW/CPB LONG TERM...KJP AVIATION...KLW/KJP MARINE...KLW/KJP TIDES/COASTAL FLOODING...KLW
Hazardous Weather Outlook National Weather Service Baltimore MD/Washington DC 219 PM EDT Sun Jul 17 2022 ANZ530>543-DCZ001-MDZ008-011-013-014-016>018-504-506-508- VAZ052>057-181830- 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-Prince William/Manassas/Manassas Park-Fairfax- Arlington/Falls Church/Alexandria-Stafford-Spotsylvania- King George- 219 PM EDT Sun Jul 17 2022 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 Isolated severe thunderstorms are possible this afternoon and evening, with damaging wind gusts being the primary threat. .DAYS TWO THROUGH SEVEN...Monday through Saturday Isolated severe thunderstorms are possible on Monday, with damaging wind gusts being the primary threat. Isolated instances of flooding are possible as well. Isolated severe thunderstorms are possible again on Thursday afternoon, with damaging winds being the primary threat. .SPOTTER INFORMATION STATEMENT... Limited spotter activation may be needed this at times through Thursday. MDZ003>006-503-505-507-VAZ025>031-036>040-050-051-501-502-505>508- WVZ050>053-055-181830- 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-Hampshire-Morgan-Berkeley-Jefferson- Hardy- 219 PM EDT Sun Jul 17 2022 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 Isolated severe thunderstorms are possible this afternoon and evening, with damaging wind gusts and large hail being the primary threats. Isolated instances of flooding are possible as well. .DAYS TWO THROUGH SEVEN...Monday through Saturday Isolated severe thunderstorms are possible on Monday, with damaging wind gusts being the primary threat. Isolated instances of flooding are possible as well. Isolated severe thunderstorms are possible again on Thursday afternoon, with damaging winds being the primary threat. .SPOTTER INFORMATION STATEMENT... Limited spotter activation may be needed at times through Thursday. MDZ001-501-502-VAZ503-504-WVZ501>506-181830- Garrett-Extreme Western Allegany-Central and Eastern Allegany- Western Highland-Eastern Highland-Western Grant-Eastern Grant- Western Mineral-Eastern Mineral-Western Pendleton- Eastern Pendleton- 219 PM EDT Sun Jul 17 2022 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 Isolated severe thunderstorms are possible this afternoon and evening, with damaging wind gusts and large hail being the primary threats. Isolated instances of flooding are possible as well. .DAYS TWO THROUGH SEVEN...Monday through Saturday Isolated severe thunderstorms are possible on Monday, with damaging wind gusts being the primary threat. Isolated instances of flooding are possible as well. Isolated severe thunderstorms are possible again on Thursday afternoon, with damaging winds being the primary threat. .SPOTTER INFORMATION STATEMENT... Limited spotter activation may be needed at times Sunday through Thursday.
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE BALTIMORE MD/WASHINGTON DC
559 PM EDT SUN JUL 17 2022
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..
0549 PM MARINE TSTM WIND 3 ESE DAHLGREN 38.31N 77.00W
07/17/2022 M45 MPH ANZ536 VA BUOY
&&
EVENT NUMBER LWX2204401
CJLThe Sterling radar (KLWX), 68 km away, was scanning. The volume nearest the first event began at 22:14 UTC.
1 thunderstorm wind. Local standard time, as filed.
Tree damage was reported southeast of Nanjemoy, including near the intersection of Tayloes Neck Road and MD-6 Port Tobacco Road.
After NWS Directive 10-1605, the rules offices file Storm Data by.
Every storm in Maryland in 2022Every state in 2022This day in weather historyWarnings in Maryland, July 2022
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: 1035967.