Alert archive / Pennsylvania / Flash Flood Warnings in 2021

Flash Flood Warning 32, NWS Binghamton, NY

July 17, 2021Bradford County, Pennsylvania

NWS Binghamton, NY issued this flash flood warning at Jul 17, 2021, 4:46 PM EDT for Bradford County, Pennsylvania. It was in force for 90 min. 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 17, 2021, 4:46 PM EDT (20:46 UTC)
Expired: Jul 17, 2021, 6:16 PM EDT
In force: 90 min
Issued by: NWS Binghamton, NY
Area: Storm-based polygon
Flood severity: None

County Bradford County, PA

The radar

The Binghamton radar (KBGM), 69 km from the middle of the area, began a volume at 20:46 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 12:00Z, 8.8 hours before the alert went out and 208 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: 0 J/kg
Mixed-layer CIN: No buoyant parcel
Mixed-layer LCL: 558 m above ground
0-6 km bulk shear: 45 kt
0-1 km storm-relative helicity: 32 m²/s²
0-3 km storm-relative helicity: 137 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

As transmitted.

351 
WGUS51 KBGM 172046
FFWBGM
PAC015-172345-
/O.NEW.KBGM.FF.W.0032.210717T2046Z-210717T2345Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
Flash Flood Warning
National Weather Service Binghamton NY
446 PM EDT Sat Jul 17 2021

The National Weather Service in Binghamton has issued a

* Flash Flood Warning for...
  Western Bradford County in northeastern Pennsylvania...

* Until 745 PM EDT.

* At 446 PM EDT, Doppler radar indicated thunderstorms producing 
  heavy rain across the warned area. Rainfall rates up to two inches 
  per hour are possible. 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...
  Chemung, Sayre, Waverly, Athens, Canton, Troy, Ridgebury, Ulster, 
  Springfield, South Waverly, Overton, Sylvania, Burlington, Wetona, 
  East Smithfield, Le Roy, Franklindale, Gillett, Milan and Grover.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

In hilly terrain there are hundreds of low water crossings which are 
potentially dangerous in heavy rain. Do not attempt to cross flooded 
roads. Find an alternate route.

&&

LAT...LON 4200 7650 4156 7648 4160 7687 4200 7693

FLASH FLOOD...RADAR INDICATED

$$

HLC

1 follow-up statement

922 
WGUS71 KBGM 172216
FFSBGM

Flash Flood Statement
National Weather Service Binghamton NY
616 PM EDT Sat Jul 17 2021

PAC015-172226-
/O.CAN.KBGM.FF.W.0032.000000T0000Z-210717T2345Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Bradford PA-
616 PM EDT Sat Jul 17 2021

...FLASH FLOOD WARNING IS CANCELLED FOR WESTERN BRADFORD COUNTY...

The heavy rain has moved to the east. There were no reports of 
flooding in the western part of Bradford County. Therefore the flash 
flood warning has been cancelled.

A Flash Flood Watch remains in effect until 200 AM EDT Sunday for 
portions of central New York and northeast Pennsylvania. A

LAT...LON 4200 7650 4156 7648 4160 7687 4200 7693

$$

DJN

The office that day

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

Issued	Product	Office	Counties	Lasted
Jul 17, 3:20 PM EDT	Areal Flood Advisory	BGM	Wayne	117 min
Jul 17, 4:35 PM EDT	Special Weather Statement	BGM	Pike	40 min
Jul 17, 4:45 PM EDT	Special Weather Statement	BGM	Susquehanna	30 min
Jul 17, 4:55 PM EDT	Flash Flood Warning	BGM	Wayne	4 hr
Jul 17, 5:06 PM EDT	Special Weather Statement	BGM	Lackawanna	24 min
Jul 17, 5:14 PM EDT	Areal Flood Advisory	BGM	Lackawanna, Luzerne, Wyoming	2 hr
Jul 17, 5:16 PM EDT	Special Weather Statement	BGM	Susquehanna	29 min
Jul 17, 5:23 PM EDT	Severe Thunderstorm Warning	BGM	Susquehanna	67 min
Jul 17, 5:28 PM EDT	Severe Thunderstorm Warning	BGM	Lackawanna, Susquehanna, Wayne, Wyoming	62 min
Jul 17, 5:35 PM EDT	Severe Thunderstorm Warning	BGM	Luzerne, Susquehanna, Wyoming	55 min
Jul 17, 6:04 PM EDT	Severe Thunderstorm Warning	BGM	Bradford, Susquehanna	41 min
Jul 17, 6:23 PM EDT	Severe Thunderstorm Warning	BGM	Bradford, Luzerne, Wyoming	30 min
Jul 17, 6:31 PM EDT	Areal Flood Advisory	BGM	Bradford, Lackawanna, Luzerne, Susquehanna, Wayne, Wyoming	2 hr
Jul 17, 6:39 PM EDT	Severe Thunderstorm Warning	BGM	Susquehanna	36 min
Jul 17, 7:06 PM EDT	Areal Flood Advisory	BGM	Bradford, Susquehanna, Wayne	2 hr
Jul 17, 7:28 PM EDT	Special Weather Statement	BGM	Luzerne	32 min
Jul 17, 7:33 PM EDT	Special Weather Statement	BGM	Wayne	27 min

Nearby

Flash Flood Warnings in Pennsylvania, 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.