An isolated thunderstorm developed across the western slopes of the northern Green Mountains in a moderately unstable airmass and moved north into Enosburg Falls where a brief and localized microburst downed a few trees.
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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 BTV wrote it up.
An isolated thunderstorm developed across the western slopes of the northern Green Mountains in a moderately unstable airmass and moved north into Enosburg Falls where a brief and localized microburst downed a few trees.
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 Burlington, VT wrote its last area forecast discussion before the first event at Aug 21, 2:45 PM EST, 1 hour 15 minutes earlier.
Area Forecast Discussion National Weather Service Burlington VT 345 PM EDT Sun Aug 21 2022 .SYNOPSIS... Showers this afternoon and evening will retreat back towards Lake Ontario overnight before slow moving low pressure tracks across the North Country bringing widespread showers and embedded thunderstorms through Wednesday. After a brief dry period, additional chances for showers return late Thursday into Friday. This weekend looks dry with temperatures trending around to a little above average. && .NEAR TERM /THROUGH MONDAY NIGHT/... As of 344 PM EDT Sunday...A swath of rain and thinner line of showers with embedded thunderstorms are pushing southwest to northeast through northern New York. These showers will progress eastward with trajectories favoring the northern half of Vermont later this afternoon and evening. Rare pulses of stronger updrafts have been evident along CAPE axis of 500-1200j/kg with the confluent line of shower/thunderstorms; gusts to 40 mph and localized heavy rainfall will continue to be possible along this feature until heating subsides and SB CAPE diminishes. Will keep chances of showers for Saint Lawrence Valley with redevelopment expected as low pressure pivots and surface confluence increases overnight while high pressure begins to nose into Vermont and the Adirondacks. Chances overnight for Vermont will be nil with only some high/mid cloud streaming over the ridge. Chances return in earnest Monday as low pressure begins to track into the North Country. For late morning/early afternoon, heating will support some increasing chances of showers ahead of synoptic forcing that will keep chances going over Monday night. Expect more chances of isolated thunderstorms which may become more scattered as confluence lines form ahead of the approaching low, but instability will be largely lacking farther east over Vermont as ample mid level cloud shield cuts SB instability. Threat for stronger cells is more limited for Monday. It may take a while for showers to get going across Vermont unless any clearing occurs, then some instability showers would form. Once synoptic lift moves eastward, chances for rain will quickly increase Monday night. Precipitation amounts were increasing along the Saint Lawrence Valley where rain will be more persistent; currently have an additional 0.5-1" through Monday night with 0.25 to 0.5 generally from central Vermont through the Adirondacks, and a trace to 0.25 inches east of the Green Mountains. && .SHORT TERM /TUESDAY THROUGH TUESDAY NIGHT/... As of 344 PM EDT Sunday...On Tuesday, it will be fairly messy with scattered showers and a few storms possible throughout much of the day as surface low pressure tracks across the area and upper trough positioned overhead. Tall, skinny CAPE with values of around 500 to 750 J/kg is expected, and there will be some marginal shear of about 20 knots with some background helicity with the trough. So brief clusters will have to be monitored for the potential for some locally heavy rain. Abundant clouds will exist, limiting potential for stronger convection, but thinking there could be some breaks across parts of Vermont. Overall, mostly 70s for high temperature readings, and there could be a few spot 80s across Vermont. Weak cold advection will initiate overnight as winds shift west to northwest. Some lingering precipitation is possible as the upper trough will very slowly shift eastwards, but activity should be fairly minimal (20 PoPs) and mainly in the Northeast Kingdom. && .LONG TERM /WEDNESDAY THROUGH SUNDAY/... As of 344 PM EDT Sunday...Heading into Wednesday, we will still be dealing with residual moisture on the backside of the trough. There could be a few showers that initiate in the afternoon before moisture departs later in the afternoon. So, the highest rain chances are expected across eastern Vermont. Despite the somewhat cooler air mass, more sunshine will allow the surface to heat a bit more, and will bring temperatures in the upper 70s to lower 80s. Heading deeper into the extended, the main change is that models have continued the trend of moving the next front's arrival towards Thursday evening and Friday morning. Due to somewhat zonal flow, this front will be oriented more east to west, but the thermal contrast looks to be enough to produce scattered precipitation at the very least. Slow to shift south, we could still be dealing with the front Friday afternoon, but by Saturday, it should be to our south. Hope you're ready, because it looks like a perfect weekend with seasonal temperatures for Saturday. Sunday will be on the warm side of normal, but the low to mid 50s dewpoints and a light breeze will keep it feeling great. && .AVIATION /20Z SUNDAY THROUGH FRIDAY/... Through 18Z Monday...Showers and thunderstorms are forming mainly over portions of northern New York. Best chances for rain on terminal will be at MSS with a line of showers currently moving northward through the Saint Lawrence Valley. CIGs/VIS have remained VFR during periods of showers, but it's reasonable to assume that a period of MVFR will be possible as rain moves on site. Best chances for showers will generally be through 00Z today, but VCSH at MSS will continue through tonight as surface boundary remains in vicinity. Elsewhere, chances will decrease after 00Z as gradient tilts with S-SE surface flow/ridging pinning boundary more towards the Saint Lawrence Valley. Low pressure will continue its slow approach tonight with MVFR CIGs and rain spreading to SLK generally after 08Z. PBG could see a few showers 12Z, but kept VCSH mentioned. For Vermont terminals, timing of rain and limiters to CIG/VIS will be more after 18Z as low's influence and areal coverage of showers increase. Breezes have been a little stronger today with gusts generally up to 20kts except at PBG where flow off Lake Champlain has been around 24kts. These speeds will taper tonight as ridging nudges in aloft, then return again Monday as the low starts tracking over the North Country. Outlook... Monday Night: Mainly VFR, with local MVFR possible. Chance SHRA. Tuesday: Mainly MVFR, with areas VFR possible. Likely SHRA, Slight chance TSRA. Tuesday Night: Mainly MVFR, with local IFR possible. Chance SHRA. Wednesday: Mainly VFR, with local IFR possible. Slight chance SHRA. Wednesday Night: VFR. NO SIG WX. Thursday: VFR. Slight chance SHRA. Thursday Night: Mainly VFR, with areas MVFR possible. Chance SHRA. Friday: Mainly VFR, with local IFR possible. Chance SHRA. && .BTV WATCHES/WARNINGS/ADVISORIES... VT...None. NY...None. && SYNOPSIS...Boyd NEAR TERM...Boyd SHORT TERM...Haynes LONG TERM...Haynes AVIATION...Boyd
Hazardous Weather Outlook National Weather Service Burlington VT 259 AM EDT Sun Aug 21 2022 NYZ026>031-034-035-087-VTZ001>011-016>021-220700- Northern St. Lawrence-Northern Franklin-Eastern Clinton- Southeastern St. Lawrence-Southern Franklin-Western Clinton- Western Essex-Eastern Essex-Southwestern St. Lawrence-Grand Isle- Western Franklin-Orleans-Essex-Western Chittenden-Lamoille-Caledonia- Washington-Western Addison-Orange-Western Rutland-Eastern Franklin- Eastern Chittenden-Eastern Addison-Eastern Rutland-Western Windsor- Eastern Windsor- 259 AM EDT Sun Aug 21 2022 This Hazardous Weather Outlook is for northern New York, central Vermont, northeast Vermont, northwest Vermont and southern Vermont. .DAY ONE...Tonight. No hazardous weather is expected at this time. .DAYS TWO THROUGH SEVEN...Sunday through Friday. No hazardous weather is expected at this time. .SPOTTER INFORMATION STATEMENT... Spotter activation is not expected at this time.
Special Weather Statement
National Weather Service Burlington VT
151 PM EDT Sun Aug 21 2022
NYZ027-030-031-211815-
Northern Franklin NY-Southern Franklin NY-Western Clinton NY-
151 PM EDT Sun Aug 21 2022
...A strong thunderstorm will impact portions of northwestern Clinton
and northeastern Franklin Counties through 215 PM EDT...
At 150 PM EDT, Doppler radar was tracking a strong thunderstorm near
Malone, moving northeast at 40 mph.
HAZARD...Winds in excess of 40 mph and pea size hail.
SOURCE...Radar indicated.
IMPACT...Gusty winds could knock down tree limbs and blow around
unsecured objects. Minor damage to outdoor objects is
possible.
Locations impacted include...
Burke, Churubusco, Chateaugay, Malone, Earlville, Whippleville, Burke
Center, North Burke, Owls Head, Chasm Falls and Brainardsville.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
If outdoors, consider seeking shelter inside a building.
&&
LAT...LON 4468 7415 4472 7433 4499 7423 4500 7387
TIME...MOT...LOC 1750Z 204DEG 36KT 4480 7419
MAX HAIL SIZE...0.25 IN
MAX WIND GUST...40 MPH
KutikoffThe Burlington radar (KCXX), 55 km away, was scanning. The volume nearest the first event began at 20:58 UTC.
1 thunderstorm wind. Local standard time, as filed.
Isolated wind damage due to wet microburst in Enosburg Falls.
After NWS Directive 10-1605, the rules offices file Storm Data by.
Every storm in Vermont in 2022Every state in 2022This day in weather historyWarnings in Vermont, August 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: 1042666.