An isolated thunderstorm developed on Monday, July 31, 2017, and resulted in localized wind damage in Dutchess County.
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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 ALY wrote it up.
An isolated thunderstorm developed on Monday, July 31, 2017, and resulted in localized wind damage in Dutchess County.
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 Albany, NY wrote its last area forecast discussion before the first event at Jul 31, 3:40 PM EST, 2 hours 50 minutes earlier.
Area Forecast Discussion National Weather Service Albany NY 440 PM EDT Mon Jul 31 2017 .SYNOPSIS... Warm and more humid conditions this week. Isolated showers and thunderstorms are possible across the local area Tuesday afternoon with scattered storms expected Wednesday. Showers and thunderstorms will be more widespread Thursday through Saturday as a slow moving cold front approaches from the west and eventually crosses the region. && .NEAR TERM /UNTIL 6 AM TUESDAY MORNING/... Isolated to scattered convection has been mainly limited to the northeastern portion of New York and Vermont this afternoon. This activity will dissipate with loss of heating. Guidance indicates the convection occurring ahead of the cold front located across the Saint Lawrence River Valley will diminish as it approaches the local area. Less comfortable conditions for sleeping tonight with milder temperatures and higher dew points. Lows are forecast to drop into the upper 50s to lower 60s with winds becoming light to calm. Conditions will be more favorable fog to form especially in valleys near bodies of waters. && .SHORT TERM /6 AM TUESDAY MORNING THROUGH WEDNESDAY NIGHT/... The approaching cold front will stall and lift back north as warm front. It will be very warm/hot with more humidity as we head into the middle of week. Dew points will rise into the mid and upper 60s by late in the day Wednesday. With little if any forcing only isolated convection is expected to develop Tuesday afternoon with scattered convection Wednesday afternoon. The activity will diminish with loss of heating. Highs are expected to be in the 80s with mid and upper 70s across the higher terrain generally above 1500 feet both Tuesday and Wednesday. Each night will be muggier as dew points rise. Overall winds be light 10 mph or less during the day become light and variable to calm overnight. && .LONG TERM /THURSDAY THROUGH MONDAY/... With a departing ridge off the eastern seaboard and an approaching trough over the upper Midwest, our region will be situated within broad southwest flow aloft to start the extended period on Thursday. Temps aloft will continue to be fairly warm with 850 hpa temps around 16 to 17 degrees C, so valley areas will likely see high temps reaching the mid to upper 80s under a partly sunny to mostly cloudy sky. Although there won't be any large-scale forcing in place, daytime heating and subtle forcing (such as lake-breeze boundaries) may develop some scattered showers and thunderstorms during the afternoon and evening. With 0-6 km bulk shear being rather weak (15 kts or less) , showers/thunderstorms will be short-lived and probably not too strong, but locally heavy downpours will be possible due to the slow movement of any shower or thunderstorm. Any convection should diminish with the loss of daytime heating on Thursday evening, allowing for mainly dry conditions on Thursday night. It will remain mild and muggy during the overnight with lows in the mid to upper 60s for most locations. On Friday, the upper level shortwave trough will continue to dig deeper as it travels across the Great Lakes. Although we will still be well-downstream of the storm's surface cold front, a pre-frontal trough will be approaching the area during the day. This should allow the coverage of showers/thunderstorms to be more widespread than Thursday, especially during the afternoon and evening hours. 0- 6 km bulk shear will increase to 20 to 30 kts, especially across northwestern areas by late in the day. Depending on how much instability occurs, there could be some locally strong storms, although instability may be limited due to cloud cover and passing showers for some areas. It will continue to be warm and muggy once again, with many valley areas winding up in the mid 80s. The upper level trough will continue to move eastward by Friday night into Saturday and the surface cold front should be moving through the area on Saturday morning. Some additional showers (and possibly a thunderstorm) will accompany the frontal passage as well. Lows on Friday night will fall into the 60s, but highs on Saturday should be a little cooler due to the clouds/showers and only reach into the 70s. Behind the boundary, cooler and less humid weather will be in place for Sunday. Still totally cannot rule out a stray shower (especially for northern areas) thanks to the cyclonic flow aloft, but most areas should be dry with temps in the 70s and dewpoints only in the 50s. With a rather fast flow in place aloft, the next system looks to be approaching from the west for early next week, with another chance for showers and thunderstorms on Monday. Temps will continue to be fairly seasonable. && .AVIATION /20Z MONDAY THROUGH SATURDAY/... High pressure will bring general VFR conditions to the region through the TAF period /18Z Tuesday/. A weak cold front will approach from the north later this afternoon and settle southward across the region tonight. Isolated showers/thunderstorms may precede/accompany this front, but due to such limited areal coverage, did not mention in current TAFs. Some fog is expected Tuesday morning, mainly in the valleys. Some MVFR/IFR VIS/CIGs possible later tonight especially at KGFL and KPSF. Any fog/low Cigs should lift between 11Z- 13Z/Mon, with VFR conditions prevailing through 18Z Tuesday. Winds will be light and variable through the TAF period except in the vicinity of showers and thunderstorms where some variable gusts of 20-30kts are possible. Outlook... Tuesday Night: No Operational Impact. Patchy FG. Wednesday: Moderate Operational Impact. Chance of SHRA...TSRA. Wednesday Night: Moderate Operational Impact. Chance of SHRA...TSRA. Thursday: Moderate Operational Impact. Chance of SHRA...TSRA. Thursday Night: Moderate Operational Impact. Chance of SHRA...TSRA. Friday: Moderate Operational Impact. Likely SHRA...TSRA. Friday Night: Moderate Operational Impact. Likely SHRA...TSRA. Saturday: High Operational Impact. Likely SHRA...TSRA. && .FIRE WEATHER... Warm and more humid conditions this week. Isolated storms are possible across the local area Tuesday afternoon with scattered storms expected Wednesday especially during the afternoon into the evening hours. Showers and thunderstorms will be more widespread Thursday through Saturday as a slow moving cold front approaches from the west and eventually crosses the region. Minimum relative humidity values are forecast to be generally 45 to 55 percent both Tuesday and Wednesday afternoons with a recovery to 90 to near 100 percent at night, with areas of dew formation likely. && .HYDROLOGY... Isolated showers and thunderstorms will dissipate with loss of heating late in the day. Isolated storms are possible across the local area Tuesday afternoon with scattered storms expected Wednesday especially during the afternoon into the evening hours. Showers and thunderstorms will be more widespread Thursday through Saturday as a slow moving cold front approaches from the west and eventually crosses the region. For details on specific area rivers and lakes, including observed and forecast river stages and lake elevations, please visit the Advanced Hydrologic Prediction Service /AHPS/ graphs on our website. && .CLIMATE... The high temperature at Albany has not reached 90+ degrees this month. The high so far today has been 87 degrees. The last time there were no 90+ degrees days at Albany in July was back in 2009. Albany has only had 5 day 90+ degrees days this year. Normal is 10 and the most occurred in 1955 with 32 days. && .ALY WATCHES/WARNINGS/ADVISORIES... CT...None. NY...None. MA...None. VT...None. && SYNOPSIS...IAA NEAR TERM...IAA SHORT TERM...IAA LONG TERM...Frugis AVIATION...SND FIRE WEATHER...IAA HYDROLOGY...IAA CLIMATE...IAA
Hazardous Weather Outlook National Weather Service Albany NY 520 PM EDT Mon Jul 31 2017 CTZ001-013-MAZ001-025-NYZ032-033-038>043-047>054-058>061-063>066- 082>084-VTZ013>015-021100- Northern Litchfield-Southern Litchfield-Northern Berkshire- Southern Berkshire-Northern Herkimer-Hamilton-Southern Herkimer- Southern Fulton-Montgomery-Northern Saratoga-Northern Warren- Northern Washington-Schoharie-Western Schenectady- Eastern Schenectady-Southern Saratoga-Western Albany-Eastern Albany- Western Rensselaer-Eastern Rensselaer-Western Greene-Eastern Greene- Western Columbia-Eastern Columbia-Western Ulster-Eastern Ulster- Western Dutchess-Eastern Dutchess-Northern Fulton-Southeast Warren- Southern Washington-Bennington-Western Windham-Eastern Windham- 520 PM EDT Mon Jul 31 2017 This Hazardous Weather Outlook is for northwestern Connecticut, western Massachusetts, east central New York, eastern New York and southern Vermont. .DAY ONE...Tonight. No hazardous weather is expected at this time. .DAYS TWO THROUGH SEVEN...Tuesday through Sunday. Scattered thunderstorms are possible Wednesday afternoon into the evening. Thunderstorms are expected to be more widespread Thursday through Saturday, especially during the afternoon and evening hours. .SPOTTER INFORMATION STATEMENT... Spotter activation is not expected at this time.
The Albany radar (KENX), 106 km away, was scanning. The volume nearest the first event began at 23:32 UTC.
1 thunderstorm wind. Local standard time, as filed.
Thunderstorm wind brought down a few six-inch diameter tree branches and wires.
After NWS Directive 10-1605, the rules offices file Storm Data by.
Every storm in New York in 2017Every state in 2017This day in weather historyWarnings in New York, July 2017
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: 712568.