Alert archive / New York / Flash Flood Warnings in 2021

Flash Flood Warning 40, NWS Binghamton, NY

July 20, 2021Chenango County, Otsego County, New York

NWS Binghamton, NY issued this flash flood warning at Jul 20, 2021, 8:28 PM EDT for Chenango County, Otsego County, New York. It was in force for 2 hr. No storm report in the archive falls inside the area while it was in force.

The area

The outline as issued.

The facts

Issued: Jul 20, 2021, 8:28 PM EDT (00:28 UTC)
Expired: Jul 20, 2021, 10:37 PM EDT
In force: 2 hr
Issued by: NWS Binghamton, NY
Area: Storm-based polygon
Flood severity: None

Counties Chenango County, NY, Otsego County, NY

The radar

The Binghamton radar (KBGM), 65 km from the middle of the area, began a volume at 00:29 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.

The nearest sounding before it

Albany, NY (KALY), launched 00:00Z, 0.5 hours before the alert went out and 133 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-p

Temperature in red, dew point in green, the mixed-layer parcel dashed.

Hodograph

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: 1226 J/kg
Mixed-layer CIN: -24 J/kg
Mixed-layer LCL: 1198 m above ground
0-6 km bulk shear: 37 kt
0-1 km storm-relative helicity: 89 m²/s²
0-3 km storm-relative helicity: 82 m²/s²
Significant tornado parameter: 0.4
Supercell composite: 4.6

Open this sounding in Storm Lab

The text

As transmitted.

220 
WGUS51 KBGM 210028
FFWBGM
NYC017-077-210330-
/O.NEW.KBGM.FF.W.0040.210721T0028Z-210721T0330Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
Flash Flood Warning
National Weather Service Binghamton NY
828 PM EDT Tue Jul 20 2021

The National Weather Service in Binghamton has issued a

* Flash Flood Warning for...
  Northern Chenango County in central New York...
  West Central Otsego County in central New York...

* Until 1130 PM EDT.

* At 828 PM EDT, Doppler radar indicated thunderstorms producing 
  heavy rain across the warned area. Between 1 and 1.5 inches of 
  rain has already fallen. Flash flooding is ongoing or expected to 
  begin shortly.

  HAZARD...Flash flooding caused by thunderstorms.

  SOURCE...Radar.

  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...
  Norwich, Edmeston, Plymouth, North Norwich, Sherburne, Pittsfield, 
  New Berlin, Columbus, Morris, Laurens, Smyrna, Mc Donough, 
  Burlington, New Lisbon, Preston, Pharsalia, South New Berlin, 
  Holmesville, Lambs Corners and South Edmeston.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

Move to higher ground now. Act quickly to protect your life.

Please report observed flooding to local emergency services or law 
enforcement and request they pass this information to the National 
Weather Service when you can do so safely.

&&

LAT...LON 4271 7566 4276 7506 4250 7505 4250 7586

FLASH FLOOD...RADAR INDICATED

$$

Kistner

1 follow-up statement

211 
WGUS71 KBGM 210237
FFSBGM

Flash Flood Statement
National Weather Service Binghamton NY
1037 PM EDT Tue Jul 20 2021

NYC017-077-210247-
/O.CAN.KBGM.FF.W.0040.000000T0000Z-210721T0330Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Chenango NY-Otsego NY-
1037 PM EDT Tue Jul 20 2021

...FLASH FLOOD WARNING IS CANCELLED FOR NORTHERN CHENANGO AND WEST 
CENTRAL OTSEGO COUNTIES...

The heavy rain has ended. Flooding is no longer expected to pose a 
threat. Please continue to heed remaining road closures.

LAT...LON 4271 7566 4276 7506 4250 7505 4250 7586

$$

Kistner

The office that day

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

Issued	Product	Office	Counties	Lasted
Jul 20, 8:05 PM EDT	Severe Thunderstorm Warning	BGM	Broome, Chenango, Cortland, Delaware, Madison, Otsego and 1 more	55 min
Jul 20, 8:31 PM EDT	Severe Thunderstorm Warning	BGM	Broome, Chemung, Schuyler, Tioga, Tompkins	59 min
Jul 20, 8:49 PM EDT	Flash Flood Warning	BGM	Steuben	3 hr
Jul 20, 8:58 PM EDT	Severe Thunderstorm Warning	BGM	Broome, Chenango, Delaware, Otsego	45 min
Jul 20, 9:28 PM EDT	Flash Flood Warning	BGM	Broome, Chenango	3 hr
Jul 20, 9:28 PM EDT	Severe Thunderstorm Warning	BGM	Broome, Delaware, Tioga	62 min
Jul 20, 9:36 PM EDT	Special Weather Statement	BGM	Steuben	24 min
Jul 20, 9:59 PM EDT	Special Weather Statement	BGM	Steuben	31 min
Jul 20, 10:28 PM EDT	Special Weather Statement	BGM	Chemung	32 min
Jul 20, 10:54 PM EDT	Flash Flood Warning	BGM	Chemung	3 hr

Nearby

Flash Flood Warnings in New York, 2021 Every flash flood warning in 2021

Sources

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