Alert archive / New York / Flash Flood Watches in 2018

Flash Flood Watch 3, NWS Binghamton, NY

August 2, 20187 counties in New York; 7 counties in Pennsylvania

NWS Binghamton, NY issued this flash flood watch at Aug 2, 2018, 3:44 AM EDT for 7 counties in New York; 7 counties in Pennsylvania. It took effect at Aug 2, 2018, 2:00 PM EDT. It was in force for 40 hr.

The area

The counties it named.

The facts

Issued: Aug 2, 2018, 3:44 AM EDT (07:44 UTC)
In effect from: Aug 2, 2018, 2:00 PM EDT
Expired: Aug 4, 2018, 5:53 AM EDT
In force: 40 hr
Issued by: NWS Binghamton, NY
Flood severity: None

Counties Broome County, NY, Chemung County, NY, Chenango County, NY, Delaware County, NY, Otsego County, NY, Sullivan County, NY, Tioga County, NY, Bradford County, PA, Lackawanna County, PA, Luzerne County, PA, Pike County, PA, Susquehanna County, PA, Wayne County, PA, Wyoming County, PA

The radar

The Binghamton radar (KBGM), 44 km from the middle of the area, began a volume at 07:44 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

Buffalo Intl Airport, NY (KBUF), launched 00:00Z, 7.7 hours before the alert went out and 274 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: 30 J/kg
Mixed-layer CIN: -25 J/kg
Mixed-layer LCL: 865 m above ground
0-6 km bulk shear: 33 kt
0-1 km storm-relative helicity: 44 m²/s²
0-3 km storm-relative helicity: 63 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

What forecasters said that day

The local office's own words before this flash flood watch 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 watch went out at Aug 2, 3:33 AM EDT, 11 minutes earlier.

Area forecast discussion, Aug 2, 3:33 AM EDT, 11 minutes before

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Hazardous weather outlook, Aug 2, 3:42 AM EDT, 2 minutes before

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In the hours before

Local storm report, Aug 1, 10:01 PM EDT, 5 hours 43 minutes before

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Local storm report, Aug 1, 10:04 PM EDT, 5 hours 40 minutes before

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The office that day

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

Issued	Product	Office	Counties	Lasted
Aug 2, 1:16 PM EDT	Areal Flood Advisory	BGM	Sullivan	119 min
Aug 2, 3:10 PM EDT	Areal Flood Advisory	BGM	Sullivan	96 min

Nearby

Flash Flood Watches in New York, 2018 Flash Flood Watches in Pennsylvania, 2018 Every flash flood watch in 2018

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.