Torrential rain producing thunderstorms moved slowly through the Finger Lakes region to the Upper Mohawk Valley. Extreme rainfall rates produced rain amounts in excess of 2 inches within 45 to 90 minutes.
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The episode as NWS BGM wrote it up.
Torrential rain producing thunderstorms moved slowly through the Finger Lakes region to the Upper Mohawk Valley. Extreme rainfall rates produced rain amounts in excess of 2 inches within 45 to 90 minutes. This led to areas of serious street and small stream flooding in central New York.
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 Binghamton, NY wrote its last area forecast discussion before the first event at Jul 8, 2:51 PM EST, 49 minutes earlier.
Area Forecast Discussion National Weather Service Binghamton NY 351 PM EDT FRI JUL 8 2016 .SYNOPSIS... Conditions remain unsettled with showers and thunderstorms affecting the area into Saturday. Heavy rain will be the biggest concern with storms. Lingering light rain showers will taper off Sunday as high pressure builds across the region early next week. && .NEAR TERM /THROUGH SATURDAY/... Complex forecast through the near term....As of mid afternoon, disorganized scattered showers and storms across forecast area as S/W moves across. Forecast guidance not handling the very near term too well. ML CAPE values are around 1000 j/kg with 0-6 km shear 25-30 knots but weak mid level lapse rates. Thus, while a few stronger to even marginally severe storms with strong winds are still possible, the bigger threat looks to be heavy rain. PWAT values currently 1.6 to 1.8 inches with weak low and mid level winds fields support slow moving, backbuilding cells. Biggest area of concern will be over the Poconos into the Catskills, especially late this afternoon through this evening where storms may tend to congeal into backbuilding multi-cell clusters this evening. Urban and small stream flooding will be possible with even the risk of flash flooding and this has been highlighted in HWO. Elsewhere, expect showers and storms to diminish through the evening behind departing wave. However overnight expect some additional showers and storms as main upper level low approaches from the west. Overnight lows will again be very mild with muggy conditions. Unsettled conditions continue Saturday as upper level low and surface cold front moves across the area. Expect additional showers and storms, especially during the afternoon due to increased heating. Deep layer shear will be stronger Saturday, around 35-40 knots, with 1000-1500 j/kg of ML CAPE likely. The best chance for any stronger storms will be east of I-81 due to the timing of the front moving through later in the day. Temperatures Saturday will be cooler, in the 70s to low 80s, with humidity levels coming down later in the day. && .SHORT TERM /SATURDAY NIGHT THROUGH MONDAY/... Heavier showers and storms diminish west to east through Saturday evening as cold front moves east and daytime heating is lost however the chance of scattered showers along with cloud cover persists overnight due to upper level low remaining nearly stationary over upstate NY. In fact the chance for scattered showers persists, especially over central NY, into Sunday morning before improvement follows heading through the afternoon as the upper low moves east. Most areas should see at least some partial sun developing by late day Sunday with diminishing chances for showers. Conditions will be much cooler and breezy due to northerly winds behind the low with highs mainly in the low to mid 70s. High pressure finally builds in for Sunday night and Monday bringing mainly clear skies. Lows will be cool, in the upper 50s for Sunday night with highs Monday rebounding to the upper 70s to low 80s. && .LONG TERM /MONDAY NIGHT THROUGH FRIDAY/... Long term pd will have the region under a building ridge and incrsg heat. Late in the pd on thu, a shrt wv brks thru the rdg and brings a chance of shwrs and tstms brkg the heat, at least temporarily. Before that, rising hgts and persistent ll sw flow will incrs aftn temps each day, along with importing moisture raising the RH and making the temps more uncomfortable. Grnly flwd the blended model guidance and prvs fcst with just a few tweeks twrd the latest info. && .AVIATION /20Z FRIDAY THROUGH WEDNESDAY/... Shrt wv mvg thru the fcst area this aftn will trigger sct lgt shwrs and tstms for the terminals with brief restrictions. As we lose htg and the wv passes, activity will taper off this eve and leave VFR cigs and vsbys with ocnl mvfr cigs and vsbys late. Htg early Sat will allow mixing and a return to vfr cigs most places a cpl hrs. Winds will be lgt thru the pd with weak flow. OUTLOOK... Sat aftn - Sun...shwrs and tstms with ocnl mvfr cigs and vsbys. Mon - Wed...VFR. && .BGM WATCHES/WARNINGS/ADVISORIES... PA...None. NY...None. && SYNOPSIS...PCF NEAR TERM...PCF SHORT TERM...PCF LONG TERM...RRM/TAC AVIATION...DGM
HAZARDOUS WEATHER OUTLOOK NATIONAL WEATHER SERVICE BINGHAMTON NY 346 PM EDT FRI JUL 8 2016 NYZ057-062-PAZ040-048-072-092000- DELAWARE-SULLIVAN-NORTHERN WAYNE-PIKE-SOUTHERN WAYNE- 346 PM EDT FRI JUL 8 2016 THIS HAZARDOUS WEATHER OUTLOOK IS FOR CENTRAL NEW YORK AND NORTHEAST PENNSYLVANIA. .DAY ONE...THIS AFTERNOON AND TONIGHT. SHOWERS AND THUNDERSTORMS WILL AFFECT THE AREA THIS AFTERNOON INTO THIS EVENING. THERE IS THE CHANCE A COUPLE OF THESE STORMS COULD BECOME STRONG TO MARGINALLY SEVERE WITH STRONG WINDS BEING THE MAIN THREAT. HOWEVER THE BIGGER CONCERN LOOKS TO BE HEAVY RAINFALL. THIS WILL BRING THE CHANCE OF URBAN AND SMALL STREAM FLOODING WITH EVEN THE RISK OF LOCALIZED FLASH FLOODING. SHOWERS AND STORMS WILL DIMINISH OVERNIGHT. .DAYS TWO THROUGH SEVEN...SATURDAY THROUGH THURSDAY. ADDITIONAL SHOWERS AND THUNDERSTORMS ARE LIKELY SATURDAY AFTERNOON WITH THE CHANCE A FEW STORMS COULD BECOME STRONG TO SEVERE. HIGH WINDS WILL BE THE BIGGEST RISK. .SPOTTER INFORMATION STATEMENT... SPOTTER ACTIVATION IS NOT EXPECTED AT THIS TIME. NYZ009-015>018-022>025-036-037-044>046-055-056-PAZ038-039-043-044- 047-092000- NORTHERN ONEIDA-YATES-SENECA-SOUTHERN CAYUGA-ONONDAGA-STEUBEN- SCHUYLER-CHEMUNG-TOMPKINS-MADISON-SOUTHERN ONEIDA-CORTLAND-CHENANGO- OTSEGO-TIOGA-BROOME-BRADFORD-SUSQUEHANNA-WYOMING-LACKAWANNA-LUZERNE- 346 PM EDT FRI JUL 8 2016 THIS HAZARDOUS WEATHER OUTLOOK IS FOR CENTRAL NEW YORK AND NORTHEAST PENNSYLVANIA. .DAY ONE...THIS AFTERNOON AND TONIGHT. SHOWERS AND THUNDERSTORMS WILL AFFECT THE AREA THIS AFTERNOON INTO EARLY THIS EVENING. THERE IS THE CHANCE A COUPLE OF THESE STORMS COULD BECOME STRONG TO MARGINALLY SEVERE WITH STRONG WINDS BEING THE MAIN THREAT. HOWEVER THE BIGGER CONCERN LOOKS TO BE HEAVY RAINFALL WHICH MAY OCCUR WITH ANY OF THESE STORMS LEADING TO LOCALIZED FLOODING...ESPECIALLY IN URBAN, LOW LYING, AND POOR DRAINAGE AREAS. STORMS WILL DIMINISH BY THE MID TO LATE EVENING. .DAYS TWO THROUGH SEVEN...SATURDAY THROUGH THURSDAY. NO HAZARDOUS WEATHER IS EXPECTED AT THIS TIME. .SPOTTER INFORMATION STATEMENT... SPOTTER ACTIVATION IS NOT EXPECTED AT THIS TIME.
The Ft Drum radar (KTYX), 81 km away, was scanning. The volume nearest the first event began at 20:41 UTC.
2 flash flood. Local standard time, as filed.
Flood water was rapidly coming out of the storm drain system with 1 foot of water moving across the Crossroads Park Drive near Liverpool.
Several roads in the area were experiencing flash urban flooding.
After NWS Directive 10-1605, the rules offices file Storm Data by.
Every storm in New York in 2016Every state in 2016This day in weather historyWarnings in New York, July 2016
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: 651732, 651734.