Alert archive / Pennsylvania / Flash Flood Warnings in 2021

Flash Flood Warning 27, NWS Binghamton, NY

July 12, 2021Bradford County, Pennsylvania

NWS Binghamton, NY issued this flash flood warning at Jul 12, 2021, 9:54 PM EDT for Bradford County, Pennsylvania. 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 12, 2021, 9:54 PM EDT (01:54 UTC)
Expired: Jul 13, 2021, 12:00 AM EDT
In force: 2 hr
Issued by: NWS Binghamton, NY
Area: Storm-based polygon
Damage threat: Considerable
Flood severity: None

County Bradford County, PA

The radar

The Binghamton radar (KBGM), 59 km from the middle of the area, began a volume at 01:58 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, 1.9 hours before the alert went out and 216 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: 23 J/kg
Mixed-layer CIN: -52 J/kg
Mixed-layer LCL: 803 m above ground
0-6 km bulk shear: 31 kt
0-1 km storm-relative helicity: 78 m²/s²
0-3 km storm-relative helicity: 87 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.1

Open this sounding in Storm Lab

The text

As transmitted.

547 
WGUS51 KBGM 130154
FFWBGM
PAC015-130400-
/O.NEW.KBGM.FF.W.0027.210713T0154Z-210713T0400Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
Flash Flood Warning
National Weather Service Binghamton NY
954 PM EDT Mon Jul 12 2021

The National Weather Service in Binghamton has issued a

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

* Until midnight EDT.

* At 954 PM EDT, Bradford County Public Safety Officials report 
  major flooding in parts of northern Bradford County. Numerous 
  roads were flooded. Several homes were either surrounded by water 
  or had water flowing through them. Route 220 near Ulster was 
  partially collapsed. Roads were flooded in Sheshequin. Runoff from 
  up to 3 inches of rain combined with wet soils from last night's 
  rain continues to cause major flood problems in northern Bradford 
  County. Expect the waters to recede by around midnight as the 
  heaviest rain has ended.

  HAZARD...Life threatening flash flooding. Runoff from excessive
           heavy rains was producing the flash flooding.

  SOURCE...Radar.

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

* Some locations that will experience flash flooding include...
  Sayre, Waverly, Athens, Towanda, Troy, Ridgebury, Wysox, Ulster, 
  Litchfield, North Towanda, Springfield, South Waverly, Windham, 
  Herrick, Rome, Le Raysville, Sylvania, Burlington and Milan.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 4175 7613 4172 7689 4188 7690 4200 7692
      4200 7615

FLASH FLOOD...RADAR INDICATED
FLASH FLOOD DAMAGE THREAT...CONSIDERABLE

$$

NICOSIA

The office that day

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

Issued	Product	Office	Counties	Lasted
Jul 12, 8:17 PM EDT	Severe Thunderstorm Warning	BGM	Bradford	43 min
Jul 12, 8:29 PM EDT	Flash Flood Warning	BGM	Susquehanna, Wayne	2 hr
Jul 12, 8:33 PM EDT	Flash Flood Warning	BGM	Bradford	3 hr
Jul 12, 8:59 PM EDT	Severe Thunderstorm Warning	BGM	Bradford, Susquehanna, Wyoming	46 min
Jul 12, 9:43 PM EDT	Severe Thunderstorm Warning	BGM	Bradford, Susquehanna, Wyoming	47 min
Jul 12, 10:09 PM EDT	Flash Flood Warning	BGM	Susquehanna, Wyoming	3 hr
Jul 12, 10:28 PM EDT	Special Weather Statement	BGM	Wyoming	32 min
Jul 12, 10:35 PM EDT	Severe Thunderstorm Warning	BGM	Lackawanna, Susquehanna, Wyoming	40 min
Jul 12, 10:59 PM EDT	Areal Flood Advisory	BGM	Wayne	2 hr
Jul 12, 11:09 PM EDT	Severe Thunderstorm Warning	BGM	Lackawanna, Pike, Susquehanna, Wayne	51 min
Jul 12, 11:17 PM EDT	Areal Flood Advisory	BGM	Lackawanna, Susquehanna	118 min
Jul 12, 11:38 PM EDT	Areal Flood Advisory	BGM	Lackawanna, Susquehanna, Wayne	112 min
Jul 12, 11:46 PM EDT	Flash Flood Warning	BGM	Bradford	3 hr
Jul 12, 11:58 PM EDT	Special Weather Statement	BGM	Lackawanna, Wayne	47 min
Jul 13, 12:25 AM EDT	Areal Flood Advisory	BGM	Lackawanna, Luzerne	2 hr
Jul 13, 12:54 AM EDT	Areal Flood Advisory	BGM	Lackawanna, Pike, Wayne	2 hr
Jul 13, 1:33 AM EDT	Areal Flood Advisory	BGM	Lackawanna	81 min
Jul 13, 12:48 PM EDT	Flash Flood Watch	BGM	Bradford, Lackawanna, Luzerne, Susquehanna, Wyoming	11 hr

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.