An unnamed creek on the northern side of Fonda overflowed its banks for the second time in a week on Friday, July 23, 2021, after a couple of thunderstorms produced a quick 1 to 2 inches of rainfall in the early afternoon hours. This caused Broadway between Route 5 and Wemple Avenue to close due to an estimated 3 inches of fast-moving water and mud on the road.
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 ALY wrote it up.
An unnamed creek on the northern side of Fonda overflowed its banks for the second time in a week on Friday, July 23, 2021, after a couple of thunderstorms produced a quick 1 to 2 inches of rainfall in the early afternoon hours. This caused Broadway between Route 5 and Wemple Avenue to close due to an estimated 3 inches of fast-moving water and mud on the road. This event was noted less severe than on July 19 with little to no impact on area businesses. The road reopened later Friday afternoon once the waters receded.
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 23, 11:51 AM EST, 56 minutes earlier.
AREA FORECAST DISCUSSION National Weather Service Albany NY 1251 PM EDT Fri Jul 23 2021 .SYNOPSIS... An upper level disturbance will cross the region today, bringing scattered showers and isolated thunderstorms. High pressure will being fair weather for tonight into Saturday. Showers and thunderstorms return for Saturday night into Sunday, as a warm front approaches from the southwest Saturday night, followed by a cold frontal passage late Sunday. && .NEAR TERM /UNTIL 6 PM THIS EVENING/... UPDATE as of 1245 PM EDT, scattered showers have developed across the northern half of the forecast area. This is in response to the upper trough axis approaching the forecast area. With that in mind, only made a few minor tweaks to the hourly temps as the forecast remains on track this afternoon. Previous discussion... As of 430 AM EDT, patchy mid level clouds continue to drop south/southeast across the region, particularly the upper Hudson Valley and southern VT. Temps have dropped to around 50 where breaks in the clouds have developed across the southern Adirondacks, with mid 50s to around 60 elsewhere. Upper level trough and attendant cold pool will remain nearby today, with H500 temps of -16 to -18 C, coldest across northeast portions of the region. Latest near-term model guidance, particularly the RAP13, suggests an embedded shortwave moving southward this afternoon across the region. Forcing from this feature, in combination with increased instability from surface heating should allow isolated to scattered showers, and a few thunderstorms to develop. It appears that the greatest ML CAPES of 400-800 J/kg will be across portions of the upper Hudson Valley/Saratoga region into southern VT and the northern Taconics/Berkshires, where some dewpoint pooling (possibly enhanced by Lake George and Champlain) provide slightly greater surface-based instability. This area will have the best chance for taller convective cells capable of producing lightning. In fact, given such cold temps aloft, would not be surprised if some hail/gusty winds occurred with the tallest cells in this region starting late morning and continuing through mid afternoon. Thunder threat may decrease for areas south/west of Albany, where mid level temps will be slightly warmer. High temps should reach the mid/upper 70s in valleys, and upper 60s to lower/mid 70s across higher terrain areas. Temps may drop into the 60s within any showers/thunderstorms. && .SHORT TERM /6 PM THIS EVENING THROUGH SUNDAY NIGHT/... Any early evening showers/thunderstorms should quickly dissipate around sunset. Skies should become mostly clear, and with winds trending light to calm, strong radiational cooling should commence. Fog will likely form as well, especially within river valleys and any areas which receive rainfall today. Expect low temps to fall into the 50s for most areas, with some mid/upper 40s possible across portions of the southern Adirondacks and southern VT. After any fog burns off Saturday, expect mostly sunny skies. However, some clouds will form, especially across higher terrain areas, and can not rule out a passing shower across some areas across southern VT and the Berkshires through mid afternoon. Otherwise, expect max temps to reach 75-80 for valleys, and 70-75 across higher elevations. For Saturday night, shortwave trough passes north of the region. A strengthening low level jet will impinge on the region from the west/southwest after midnight, allowing for a surge of warm advection and for an area or cluster of showers and embedded thunderstorms to develop and/or propagate through the region. It is possible that some form of an MCS occurs, and will have to watch for locally heavy downpours. Also, some gusty winds can not be ruled out, both with the general gradient flow within north/south valleys, and perhaps within deeper convective elements, given the strength of the low level jet (H850 winds of 30-40+ KT). Instability looks mainly elevated, with Showalter Indices dropping to between 0 and -3C by daybreak Sunday. Low temps mainly in the 60s for valleys, and 50s for higher elevations. Sunday morning, clusters of showers/thunderstorms should continue moving across the region, with areas near and north of I-90 having the best chances due to better forcing. Locally heavy downpours and gusty winds could occur. The main forcing should then shift east of the region by late morning and afternoon, however a surface trough/dewpoint boundary looks to settle southeast across the region during the afternoon hours. This could set the stage for isolated-scattered thunderstorm development near this boundary. 0-6 km shear is 25-30 KT, and H7-H5 lapse rates are generally 5.5-6 C/km. This suggests (esp the shear) some storm organization is possible. In addition, winds will be veering with height, with south/southwest winds in the lower levels, and west to northwest winds in the mid levels around H500, so at least some mid level rotation is possible, potentially further enhancing storm organization, esp with any discrete cells. The greatest uncertainty for Sunday is placement of the aforementioned boundary, and therefore focus for thunderstorm development and coverage. Current guidance seems to favor areas along and especially south of I-90, although due to uncertainty, SPC has placed most of the region within the Day 3 Marginal Risk for severe thunderstorms. Main threat would be isolated damaging wind gusts from any bowing line segments that form from small clusters of thunderstorms, although can not rule out hail if any discrete cells form initially. Also, there is some possibility for training of thunderstorms, so isolated flash flooding can not be ruled out, especially given such wet antecedent soil conditions from several weeks of heavy rainfall. Hopefully, trends in CAMS over the next 24 hours will help resolve the uncertainty issues in placement and coverage of thunderstorm development. Temperatures for Sunday will be tricky, depending on how much clearing occurs behind the morning showers/thunderstorms. Currently favoring mostly 70s, however some 80s could occur in areas where sun breaks out, which looks to be across the western Mohawk Valley south and east into the eastern Catskills and mid Hudson Valley/NW CT. Dewpoints should climb to 65-70 for many areas, so it will be much more humid compared to Saturday. Showers/thunderstorms may linger into Sunday evening for areas south of I-90, before decreasing. Otherwise warm and humid, with lows mainly in the 60s. && .LONG TERM /MONDAY THROUGH THURSDAY/... The long term period will start out warm, humid and mostly dry with slightly cooler, more unsettled conditions returning as the week progresses. A general west to east zonal upper-level flow is anticipated on Monday while a small area of high pressure approaches in the wake of the cold front from Sunday. That front will not bring much relief as it will remain quite warm and humid. However, the presence of dry air (precipitable water values at or under 1 inch) and lack of a trigger should lead to mainly dry weather. An isolated shower or rumble of thunder cannot be ruled out though, mainly across northern areas, but most stay dry. High temperatures will reach the mid-70s in the higher elevations to the mid- to upper 80s in the valleys. Tuesday through Thursday will consist of increasingly unsettled weather as a broad upper-level trough builds across the region and individual disturbances/shortwaves pass through the flow. There has been some model differences with the timing of these events, but there is moderate confidence at least two surface features can bring showers and thunderstorms to the area. The first is a cold front slowly pushing southeastward across the region on Tuesday with scattered showers and thunderstorms. Another system, possibly stronger, could bring more widespread shower/thunderstorm activity during the Wednesday and Thursday timeframe. It will remain warm on Tuesday with highs ranging from the mid-70s in the higher terrain to the mid- to upper 80s in the valleys. With the increasing rain and cloud potential Wednesday and Thursday, high temperatures will trend slightly downward to near-normal values (upper 60s/lower 70s in the higher terrain to the upper 70s and lower 80s in the valleys). Low temperatures throughout the long term period will be in the 50s and 60s. && .AVIATION /18Z FRIDAY THROUGH WEDNESDAY/... Through 12Z Saturday...VFR conditions are expected for much of the day today with just some occasional low and mid-level clouds above 5000 feet. Isolated showers and thunderstorms are expected to develop this afternoon, some of which could be near KALB/KGFL/KPSF. Will maintain VCSH given the sparse coverage. However, a brief IFR/MVFR period is possible should any shower pass directly over the TAF site. Clouds will dissipate tonight, which should give way to some patchy fog, with the highest confidence for visibility/ceiling reductions at KGFL. Wind will become north to northwesterly at 5 to 10 kt today, then trend calm tonight. Outlook... Saturday Night: High Operational Impact. Breezy. Definite SHRA...TSRA. Sunday: High Operational Impact. Breezy. Likely SHRA...TSRA. Sunday Night: Low Operational Impact. Isolated SHRA...TSRA. Monday: Low Operational Impact. NO SIG WX. Monday Night: No Operational Impact. NO SIG WX. Tuesday: Low Operational Impact. Slight Chance of SHRA...TSRA. && .FIRE WEATHER... An upper level disturbance will move through today, bringing isolated to scattered showers and possibly a few thunderstorms. A period of generally fair weather is expected tonight into Saturday, before showers and thunderstorms return for Saturday night into Sunday. RH values will drop to 50-60 percent this afternoon, then recover to around 100 percent tonight with widespread dew formation likely. RH should fall to 40-50 percent Saturday afternoon. Winds will become west to northwest at 5-15 mph today, then trend to calm tonight. On Saturday, winds will become south to southeast at 5-15 mph. Winds will be stronger, and variable in direction in and near any thunderstorms today. && .HYDROLOGY... Isolated to scattered showers and isolated thunderstorms are possible today. Briefly heavy rain could result in ponding of water in urban/poor drainage areas, but sparse coverage should limit further hydrological impacts. Generally dry weather is expected tonight through Saturday. Then, showers and embedded thunderstorms are expected for late Saturday night and Sunday morning, with additional isolated to scattered thunderstorms possible Sunday afternoon. Locally heavy downpours will be possible, and given wet antecedent conditions, can not rule out isolated flash flooding, especially if any training/backbuilding of thunderstorms occurs. At the very least, additional minor flooding of poor drainage/urban areas will be possible Sunday. 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. && .ALY WATCHES/WARNINGS/ADVISORIES... CT...None. NY...None. MA...None. VT...None. && SYNOPSIS...KL/NAS NEAR TERM...KL/JLV SHORT TERM...KL LONG TERM...Rathbun AVIATION...Speciale FIRE WEATHER...KL/NAS HYDROLOGY...KL/NAS
Hazardous Weather Outlook National Weather Service Albany NY 439 AM EDT Fri Jul 23 2021 CTZ001-013-MAZ001-025-NYZ032-033-038>043-047>054-058>061-063>066- 082>084-VTZ013>015-241100- 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- 439 AM EDT Fri Jul 23 2021 This Hazardous Weather Outlook is for northwestern Connecticut, western Massachusetts, eastern New York, and for southern Vermont. .DAY ONE...Today and tonight. Isolated thunderstorms are possible today, mainly late this morning through this afternoon. A few thunderstorms could contain gusty winds and small hail. .DAYS TWO THROUGH SEVEN...Saturday through Thursday. There is a chance of non severe thunderstorms late Saturday night. There is a marginal risk for severe thunderstorms Sunday, with isolated damaging wind gusts possible. In addition, locally heavy rainfall could result in isolated flash flooding. There is a chance of thunderstorms Wednesday and Thursday. .SPOTTER INFORMATION STATEMENT... Spotter activation may be Sunday.
Special Weather Statement
National Weather Service Albany NY
132 PM EDT Fri Jul 23 2021
NYZ039-040-231800-
Southern Fulton-Montgomery-
132 PM EDT Fri Jul 23 2021
...A STRONG THUNDERSTORM WILL AFFECT SOUTH CENTRAL FULTON AND CENTRAL
MONTGOMERY COUNTIES...
At 132 PM EDT, a strong thunderstorm was located over Johnstown,
moving southeast at 20 mph.
Winds in excess of 30 mph and pea size hail are possible with this
storm.
Locations impacted include...
Amsterdam, Gloversville, Johnstown, Fonda, Fort Johnson, Tribes Hill,
Glen, Berkshire, Charleston, Fultonville, Auriesville, Meco, West
Perth, Church Corners, Sammonsville, Young Corners, Lost Valley,
Market Corners, Davis Corners and Minaville.
This includes Interstate 90 between exits 27 and 28.
LAT...LON 4299 7456 4309 7436 4291 7412 4282 7428
4280 7446
TIME...MOT...LOC 1732Z 327DEG 16KT 4298 7441
NASThe national radar mosaic for the moment the first event began.
1 flood. Local standard time, as filed.
Broadway between Route 5 and Wemple Avenue was closed due to flash flooding after an unnamed creek overflowed its banks north of town.
After NWS Directive 10-1605, the rules offices file Storm Data by.
Every storm in New York in 2021Every state in 2021This day in weather historyWarnings in New York, July 2021
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: 975835.