Alert archive / New York / Flash Flood Warnings in 2026

Flash Flood Warning 39, NWS Binghamton, NY

August 7, 2026Wayne County, Pennsylvania; Delaware County, Sullivan County, New York

NWS Binghamton, NY issued this flash flood warning at Aug 7, 2026, 3:07 PM EDT for Wayne County, Pennsylvania; Delaware County, Sullivan County, New York. It was in force for 3 hr. 2 reports came from inside the area while it was in force.

The area

The outline as issued, with what was reported inside it.

The facts

Issued
Aug 7, 2026, 3:07 PM EDT (19:07 UTC)
Expired
Aug 7, 2026, 5:54 PM EDT
In force
3 hr
Issued by
NWS Binghamton, NY
Area
Storm-based polygon
Flood severity
None

Counties Delaware County, NY, Sullivan County, NY, Wayne County, PA

The radar

The Binghamton radar (KBGM), 75 km from the middle of the area, began a volume at 19:10 UTC, the scan nearest the moment this went out.

Open the radar archive at this moment

The archived warnings, watches and discussions in force at that minute are drawn over the scan, this one among them.

What was reported inside it

TimeReportWhereRemark
Aug 7, 3:44 PM EDTFLASH FLOOD2 Ssw Fremont, NYPart of State Route 97 washed out in Hankins.
Aug 7, 4:35 PM EDTFLASH FLOOD1 Nw Callicoon Center, NYReports of flash flooding in a couple spots along Buck Brook Road.

Local storm reports filed while the alert was in force, from inside its polygon or its counties.

Did it verify

Verified. The Iowa Environmental Mesonet's Cow matched 2 storm reports to this flash flood warning; the first came 37 minutes after it went out.

Cow counts a report within 15 km of the polygon while the warning was in force: a tornado for a tornado warning; hail of 1 inch or more, a gust of 58 mph or more or wind damage for a severe thunderstorm warning; a flash flood report for a flash flood warning.

The nearest sounding before it

Albany, NY (KALY), launched 12:00Z, 7.1 hours before the alert went out and 141 km from the middle of its area. This is the routine balloon launch nearest before it, the air the forecaster had in hand, not a measurement taken for the alert.

Skew-T log-pSkew-T log-p diagram, Albany, NY at 12:00Z on 2026-08-07Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 0 joules per kilogram.LCL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°0°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Albany, NY at 12:00Z on 2026-08-07The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity -47 square meters per square second.193958Sfc1 km3 km6 km9 kmRMLM
The wind turning with height, colored by layer: ground to 1 km, 1 to 3 km, 3 to 6 km, 6 to 10 km.
Mixed-layer CAPE
0 J/kg
Mixed-layer CIN
No buoyant parcel
Mixed-layer LCL
1096 m above ground
0-6 km bulk shear
33 kt
0-1 km storm-relative helicity
-47 m²/s²
0-3 km storm-relative helicity
-25 m²/s²
Significant tornado parameter
0.0
Supercell composite
-0.2

Open this sounding in Storm Lab

The text

As transmitted.

302 
WGUS51 KBGM 071907
FFWBGM
NYC025-105-PAC127-072200-
/O.NEW.KBGM.FF.W.0039.260807T1907Z-260807T2200Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
Flash Flood Warning
National Weather Service Binghamton NY
307 PM EDT Fri Aug 7 2026

The National Weather Service in Binghamton has issued a

* Flash Flood Warning for...
  Southwestern Delaware County in central New York...
  Northwestern Sullivan County in central New York...
  Northeastern Wayne County in northeastern Pennsylvania...

* Until 600 PM EDT.

* At 307 PM EDT, Doppler radar indicated thunderstorms producing
  heavy rain across the warned area. The expected rainfall rate is 1
  to 2 inches in 1 hour. Flash flooding is ongoing or expected to
  begin shortly.

  HAZARD...Flash flooding caused by thunderstorms.

  SOURCE...Radar indicated.

  IMPACT...Flash flooding of small creeks and streams, urban areas,
           highways, streets and underpasses as well as other poor
           drainage and low-lying areas.

* Some locations that will experience flash flooding include...
  Callicoon, Hancock, Peabrook, Stalker, Hankins, East Branch, Fishs
  Eddy, Equinunk, Harvard and Hortonville.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Be aware of your surroundings and do not drive on flooded roads.

&&

LAT...LON 4196 7530 4204 7510 4194 7493 4178 7498
      4173 7512 4187 7527 4187 7528 4192 7529

FLASH FLOOD...RADAR INDICATED
EXPECTED RAINFALL RATE...1-2 INCHES IN 1 HOUR

$$

JAB
2 follow-up statements
564 
WGUS71 KBGM 071956
FFSBGM

Flash Flood Statement
National Weather Service Binghamton NY
356 PM EDT Fri Aug 7 2026

NYC025-105-PAC127-072200-
/O.CON.KBGM.FF.W.0039.000000T0000Z-260807T2200Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Delaware NY-Sullivan NY-Wayne PA-
356 PM EDT Fri Aug 7 2026

...FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 6 PM EDT THIS EVENING
FOR SOUTHWESTERN DELAWARE, NORTHWESTERN SULLIVAN AND NORTHEASTERN
WAYNE COUNTIES...

At 356 PM EDT, local law enforcement reported thunderstorms producing
heavy rain in northern Sullivan County around Hankins. The expected
rainfall rate is 1 to 2 inches in an hour. Additional rainfall
amounts of 1 to 2 inches are possible in the warned area. Flash
flooding is already occurring.

HAZARD...Life threatening flash flooding. Thunderstorms producing
         flash flooding.

SOURCE...Law enforcement reported.

IMPACT...Life threatening flash flooding of creeks and streams, urban
         areas, highways, streets and underpasses.

Some locations that will experience flash flooding include...
  Callicoon, Hancock, Peabrook, Stalker, Hankins, East Branch, Fishs
  Eddy, Equinunk, Harvard and Hortonville.

Road washouts are being reported in the area. Heavy rainfall is
expected to continue for at least the next hour.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Turn around, don't drown when encountering flooded roads. Most flood
deaths occur in vehicles.

Flooding is occurring or is imminent. It is important to know where
you are relative to streams, rivers, or creeks which can become
killers in heavy rains. Campers and hikers should avoid streams or
creeks.

&&

LAT...LON 4196 7530 4204 7510 4194 7493 4178 7498
      4173 7512 4187 7527 4187 7528 4192 7529

FLASH FLOOD...OBSERVED
FLASH FLOOD DAMAGE THREAT...CONSIDERABLE
EXPECTED RAINFALL RATE...1-2 INCHES IN 1 HOUR

$$

JAB
855 
WGUS71 KBGM 072154
FFSBGM

Flash Flood Statement
National Weather Service Binghamton NY
554 PM EDT Fri Aug 7 2026

NYC025-105-PAC127-072204-
/O.CAN.KBGM.FF.W.0039.000000T0000Z-260807T2200Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Delaware NY-Sullivan NY-Wayne PA-
554 PM EDT Fri Aug 7 2026

...FLASH FLOOD WARNING FOR SOUTHWESTERN DELAWARE, NORTHWESTERN
SULLIVAN AND NORTHEASTERN WAYNE COUNTIES HAS BEEN REPLACED WITH A
FLOOD WARNING...

Heavy rain has moved out of the area. However, there will still be
potential for localized hydro issues due to runoff.

&&

LAT...LON 4196 7530 4204 7510 4194 7493 4178 7498
      4173 7512 4187 7527 4187 7528 4192 7529

$$

BTL

What forecasters said that day

The local office's own words before this flash flood warning went out, 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 this flash flood warning went out at Aug 7, 1:52 PM EDT, 1 hour 15 minutes earlier. Its key messages:

  • 1) Showers and storms expected today and Saturday. A few severe storms will be possible this afternoon and evening with gusty winds and heavy rain as the main threats. Isolated flash flooding from these storms will be possible. Heat and humidity remain across the region. 2) After quiet weather on Sunday, an active pattern returns for next week with a gradual cooling trend expected as the week progresses.
Area forecast discussion, Aug 7, 1:52 PM EDT, 1 hour 15 minutes before
Area Forecast Discussion
National Weather Service Binghamton NY
152 PM EDT Fri Aug 7 2026

.WHAT HAS CHANGED...
Increased chances for severe storms and flash flooding this
afternoon. Adjusted precipitation chances to reflect this.

&&

.KEY MESSAGES...
1) Showers and storms expected today and Saturday. A few
severe storms will be possible this afternoon and evening with
gusty winds and heavy rain as the main threats. Isolated flash
flooding from these storms will be possible. Heat and humidity
remain across the region.

2) After quiet weather on Sunday, an active pattern returns for next
week with a gradual cooling trend expected as the week
progresses.

&&

.DISCUSSION...
KEY MESSAGE 1...

Heat and humidity will continue to build as the day progresses,
with highs in the mid to upper 80s and dewpoints back in the
upper 60s to low 70s. Rain and thunderstorms have moved into the
area from the west and south and will continue to spread across
the region as the afternoon progresses. CAPE has really
increased over the past hour, with areas across NEPA into the
Southern Tier already seeing values above 2000 j/kg with most of
the CIN mixed out. To go along with the increased
instability, effective bulk shear of 30kts has spread across the
region ahead of the approaching shortwave. This will support
loosely organized clusters of thunderstorms with main threats
isolated damaging winds and heavy rain causing instances of
isolated flash flooding. Best chances for severe weather
currently look to be cross the Wyoming Valley into the Catskills
where higher CAPE and shear values could produce some better
cluster organization. Storms should stick around into the
evening hours.

Heavy rain will be accompany some of these storms, allowing for a
chance for isolated flash flooding across areas that have been
saturated from the recent rains. PWATs remain under 2in but with
the early storms and expected rain and storms later this
afternoon, flash flooding risks will continue.

On Saturday, another weak shortwave will ripple through the area,
kicking off another round of showers and storms in the afternoon and
evening. The severe threat looks very low as bulk shear is forecast
to be weak and CAPE a lower than today. Heavy rain chances will
remain, with isolated flash flooding possible across areas
saturated by recent rains. A Marginal Risk for flash flooding
continues across the area.

KEY MESSAGE 2...

***The forecast for Sunday into next week has not changed much
 since the last forecast package, thus, the discussion remains
 unchanged.***

A welcome reprieve from heat and rain is expected on Sunday as weak
high pressure builds into the area. Temps in the upper 70s to mid
80s are expected, but the much lower humidity will make it feel
quite nice outside.

A weather pattern change starting at the beginning of next week will
bring continued shower chances through the week, but temperatures
and humidity will be trending lower. The Bermuda high is expected to
weaken and slide south over the Bahamas into the Gulf as more zonal
flow develops across the Great Lakes into the Northeast. This will
end the southerly flow pushing the higher humidity into the area and
allow for Canadian air to filter into the region, bringing cooler
temperatures through the week. A few shortwaves will ripple through
the pattern, kicking off scattered showers through mid week. A
stronger shortwave with a cold front is progged to move through the
area sometime during the end of the week, bringing high pressure,
dry conditions and cooler temps for the weekend.

&&

.AVIATION /18Z FRIDAY THROUGH WEDNESDAY/...
Mainly VFR conditions for the remainder of the day and into the
evening. The exception to this will be where area of showers and
thunderstorms cross the terminals, with heavy downpours lowering
VSBYs to IFR at times and CIGs to MVFR/IFR briefly. Best timing for
showers/storms is expected through the mid evening hours for the
eastern portions of the area. Greatest shower/storm potential
expected for southern terminals today.

Conditions will remain mainly VFR to start the overnight hours, but
CIGs will lower toward MVFR through the night. The higher terrain
will have the potential to drop down to IFR and below. Fog in
the usual areas will be possible Saturday morning as well,
lowering CIGs/VSBY.

For Saturday, mainly VFR conditions expected with brief restrictions
possible in scattered showers/thunderstorms with localized downpours
possible.

Outlook:

Saturday night through Wednesday...A few lingering showers/storms
for Saturday night with brief restrictions possible. Mainly dry
Sunday through Monday morning, with VFR conditions expected. Monday
afternoon through Wednesday, unsettled with repeating times of
showers and scattered thunderstorms and associated restrictions.
Overnight fog/mist restrictions are also possible.

&&

.BGM WATCHES/WARNINGS/ADVISORIES...
PA...None.
NY...None.

&&

DISCUSSION...JTC
AVIATION...SJW
Hazardous weather outlook, Aug 7, 1:27 PM EDT, 1 hour 40 minutes before
Hazardous Weather Outlook
National Weather Service Binghamton NY
127 PM EDT Fri Aug 7 2026

NYZ009-015>018-022>025-036-037-044>046-055>057-062-PAZ038>040-043-
044-047-072-081730-
Northern Oneida-Yates-Seneca-Southern Cayuga-Onondaga-Steuben-
Schuyler-Chemung-Tompkins-Madison-Southern Oneida-Cortland-Chenango-
Otsego-Tioga-Broome-Delaware-Sullivan-Bradford-Susquehanna-
Northern Wayne-Wyoming-Lackawanna-Luzerne-Southern Wayne-
127 PM EDT Fri Aug 7 2026

This Hazardous Weather Outlook is for central New York and
northeast Pennsylvania.

.DAY ONE...This afternoon and tonight.

Scattered showers and thunderstorms today will have the potential
for locally heavy downpours, resulting in excessive runoff. Gusty
winds are also possible with a few of these storms.

.DAYS TWO THROUGH SEVEN...Saturday through Thursday.

Hazardous weather is not expected at this time.

.SPOTTER INFORMATION STATEMENT...

Spotter activation may be needed. Please relay any information about
severe weather to the NWS.

PAZ048-081730-
Pike-
127 PM EDT Fri Aug 7 2026

...SEVERE THUNDERSTORM WATCH 540 IN EFFECT UNTIL 9 PM EDT THIS
EVENING...

This Hazardous Weather Outlook is for northeast Pennsylvania.

.DAY ONE...This afternoon and tonight.

Please listen to NOAA Weather Radio or go to weather.gov on the
Internet for more information about the following hazards.

   Severe Thunderstorm Watch.

Scattered showers and thunderstorms today will have the potential
for locally heavy downpours, resulting in excessive runoff. Damaging
winds are also possible with a few of these storms.

.DAYS TWO THROUGH SEVEN...Saturday through Thursday.

Hazardous weather is not expected at this time.

.SPOTTER INFORMATION STATEMENT...

Spotter activation may be needed. Please relay any information about
severe weather to the NWS.

In the hours before

Local storm report, Aug 7, 9:54 AM EDT, 5 hours 13 minutes before
Preliminary Local Storm Report
National Weather Service Binghamton NY
954 AM EDT Fri Aug 7 2026

..TIME...   ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
..DATE...   ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
            ..REMARKS..

0513 PM     Tstm Wnd Dmg     Whitney Point           42.33N 75.97W
08/06/2026                   Broome             NY   Broadcast Media

            Corrects previous tstm wnd dmg report from
            Whitney Point. Trees down throughout the
            area.

&&
Special weather statement, Aug 7, 1:28 PM EDT, 1 hour 39 minutes before
Special Weather Statement
National Weather Service Binghamton NY
128 PM EDT Fri Aug 7 2026

NYZ057-062-PAZ039-040-043-044-047-048-072-072130-
Delaware-Sullivan-Susquehanna-Northern Wayne-Wyoming-Lackawanna-
Luzerne-Pike-Southern Wayne-
128 PM EDT Fri Aug 7 2026

...LOCALLY HEAVY RAIN GUSTY WINDS LIKELY THIS AFTERNOON AND
EVENING...

A broad area of showers and thunderstorms continues to develop and
move slowly over the area this afternoon. These showers and
storms may contain locally heavy rainfall up to an inch in a short
amount of time. This rapid accumulation of rain may cause minor
flooding of poor drainage areas in the more urbanized and steep
terrain locations. Most flooding should be mainly an
inconvenience, but if several showers and storms pass through the
same locations...flood problems could become worse. Some of the
storms could also produce small hail and brief gusty winds from
strong downbursts.

Pay close attention if driving through these heavier storm cells,
or if you live near flood prone areas.

BT
Special weather statement, Aug 7, 2:03 PM EDT, 1 hour 4 minutes before
Special Weather Statement
National Weather Service Binghamton NY
203 PM EDT Fri Aug 7 2026

NYZ017-025-071830-
Southern Cayuga NY-Tompkins NY-
203 PM EDT Fri Aug 7 2026

...A STRONG THUNDERSTORM WILL IMPACT SOUTHEASTERN CAYUGA AND NORTH
CENTRAL TOMPKINS COUNTIES THROUGH 230 PM EDT...

At 203 PM EDT, Doppler radar was tracking a strong thunderstorm near
Genoa, or 10 miles north of Ithaca, moving northeast at 20 mph.

HAZARD...Wind gusts up to 40 mph.

SOURCE...Radar indicated.

IMPACT...Gusty winds could knock down tree limbs and blow around
         unsecured objects.

Locations impacted include...
Groton, Locke, Genoa, Moravia, Niles, Venice Center, King Ferry,
Montville, Cascade, and West Groton.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

If outdoors, consider seeking shelter inside a building.

Heavy rainfall is also occurring with this storm and may lead to
localized flooding. Do not drive your vehicle through flooded
roadways.

&&

LAT...LON 4285 7640 4264 7626 4263 7627 4262 7627
      4251 7655 4255 7659 4257 7663 4260 7665
      4264 7667
TIME...MOT...LOC 1803Z 239DEG 19KT 4260 7651

MAX HAIL SIZE...0.00 IN
MAX WIND GUST...40 MPH

JTC
Special weather statement, Aug 7, 2:54 PM EDT, 13 minutes before
Special Weather Statement
National Weather Service Binghamton NY
254 PM EDT Fri Aug 7 2026

NYZ018-044-045-071930-
Chenango NY-Onondaga NY-Cortland NY-
254 PM EDT Fri Aug 7 2026

...A STRONG THUNDERSTORM WILL IMPACT CORTLAND...SOUTHEASTERN ONONDAGA
AND NORTHWESTERN CHENANGO COUNTIES THROUGH 330 PM EDT...

At 254 PM EDT, Doppler radar was tracking a strong thunderstorm over
East Homer, or near Cortland, moving northeast at 25 mph.

HAZARD...Wind gusts up to 40 mph.

SOURCE...Radar indicated.

IMPACT...Gusty winds could knock down tree limbs and blow around
         unsecured objects.

Locations impacted include...
Cortland, Homer, Virgil, Preble, Truxton, Solon, Cincinnatus, McGraw,
Cuyler, and Harford.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

If outdoors, consider seeking shelter inside a building.

Heavy rainfall is also occurring with this storm and may lead to
localized flooding. Do not drive your vehicle through flooded
roadways.

&&

LAT...LON 4292 7596 4281 7589 4273 7589 4273 7584
      4254 7572 4241 7622 4241 7625 4270 7625
TIME...MOT...LOC 1854Z 241DEG 22KT 4267 7611

MAX HAIL SIZE...0.00 IN
MAX WIND GUST...40 MPH

JTC
Local storm report, Aug 7, 3:05 PM EDT, 2 minutes before
Preliminary Local Storm Report
National Weather Service Binghamton NY
305 PM EDT Fri Aug 7 2026

..TIME...   ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
..DATE...   ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
            ..REMARKS..

0300 PM     Tstm Wnd Dmg     1 ENE Dingmans Ferry    41.22N 74.87W
08/07/2026                   Pike               PA   911 Call Center

            Tree down on powerline blocking roadway in
            the area of Dingmans Ferry.

&&

BJT

The office that day

Everything else NWS Binghamton, NY issued on the same UTC day.

IssuedProductOfficeCountiesLasted
Aug 7, 1:37 PM EDTSevere Thunderstorm WarningBGMLuzerne32 min
Aug 7, 2:17 PM EDTSevere Thunderstorm WarningBGMPike43 min
Aug 7, 3:49 PM EDTSevere Thunderstorm WarningBGMSusquehanna41 min
Aug 7, 5:54 PM EDTAreal Flood WarningBGMWayne51 min
Aug 7, 2:03 PM EDTSpecial Weather StatementBGMTompkins27 min
Aug 7, 2:54 PM EDTSpecial Weather StatementBGMCortland36 min
Aug 7, 2:57 PM EDTFlash Flood WarningBGMCortland, Madison, Onondaga3 hr
Aug 7, 3:20 PM EDTSevere Thunderstorm WarningBGMSullivan40 min
Aug 7, 4:35 PM EDTRiver Flood WarningBGMMadison, Oneida4 hr
Aug 7, 6:42 PM EDTFlash Flood WarningBGMMadison, Onondaga3 hr

Nearby

Flash Flood Warnings in New York, 2026Flash Flood Warnings in Pennsylvania, 2026Every flash flood warning in 2026

Sources

The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.