Alert archive / Pennsylvania / Flash Flood Warnings in 2021

Flash Flood Warning 29, NWS Binghamton, NY

July 12, 2021Bradford County, Pennsylvania

NWS Binghamton, NY issued this flash flood warning at Jul 12, 2021, 11:46 PM EDT for Bradford County, Pennsylvania. It was in force for 3 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, 11:46 PM EDT (03:46 UTC)
Expired
Jul 13, 2021, 3:00 AM EDT
In force
3 hr
Issued by
NWS Binghamton, NY
Area
Storm-based polygon
Flood severity
None

County Bradford County, PA

The radar

The Binghamton radar (KBGM), 73 km from the middle of the area, began a volume at 03:46 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 00:00Z, 3.8 hours before the alert went out and 230 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, Buffalo Intl Airport, NY at 00:00Z on 2021-07-13Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 23 joules per kilogram.LCLLFCEL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Buffalo Intl Airport, NY at 00:00Z on 2021-07-13The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 78 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
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.

863 
WGUS51 KBGM 130346
FFWBGM
PAC015-130700-
/O.NEW.KBGM.FF.W.0029.210713T0346Z-210713T0700Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
Flash Flood Warning
National Weather Service Binghamton NY
1146 PM EDT Mon Jul 12 2021

The National Weather Service in Binghamton has issued a

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

* Until 300 AM EDT.

* At 1146 PM EDT, Rainfall has ended across the warning area, but 
  runoff from earlier thunderstorms is likely to continue to cause 
  flooding for several more hours.

  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...
  Canton, Wyalusing, New Albany, Overton, South Branch, Monroeton, 
  Franklindale, Le Roy, Sugar Run, Camptown, Grover, West Franklin, 
  Wilmot, Hollenback, Monroe, Alba, Liberty Corners, Evergreen, 
  Durell and Terrytown.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Be especially cautious at night when it is harder to recognize the 
dangers of flooding.

&&

LAT...LON 4172 7689 4177 7616 4165 7618 4164 7620
      4154 7622 4160 7687

FLASH FLOOD...RADAR INDICATED
EXPECTED RAINFALL...2-2.5 INCHES IN 1 HOUR

$$

MPH
1 follow-up statement
271 
WGUS71 KBGM 130652
FFSBGM

Flash Flood Statement
National Weather Service Binghamton NY
252 AM EDT Tue Jul 13 2021

PAC015-130702-
/O.EXP.KBGM.FF.W.0029.000000T0000Z-210713T0700Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Bradford PA-
252 AM EDT Tue Jul 13 2021

...FLASH FLOOD WARNING WILL EXPIRE AT 3 AM EDT EARLY THIS MORNING 
FOR SOUTHERN BRADFORD COUNTY...

Flood waters have receded. The heavy rain has ended. Flooding is no 
longer expected to pose a significant threat. Please continue to 
heed all remaining road closures, and be especially cautious driving 
at night.

LAT...LON 4172 7689 4177 7616 4165 7618 4164 7620
      4154 7622 4160 7687

$$

MJM

The office that day

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

IssuedProductOfficeCountiesLasted
Jul 12, 8:17 PM EDTSevere Thunderstorm WarningBGMBradford43 min
Jul 12, 8:29 PM EDTFlash Flood WarningBGMSusquehanna, Wayne2 hr
Jul 12, 8:33 PM EDTFlash Flood WarningBGMBradford3 hr
Jul 12, 8:59 PM EDTSevere Thunderstorm WarningBGMBradford, Susquehanna, Wyoming46 min
Jul 12, 9:43 PM EDTSevere Thunderstorm WarningBGMBradford, Susquehanna, Wyoming47 min
Jul 12, 9:54 PM EDTFlash Flood Warning Considerable damage threatBGMBradford2 hr
Jul 12, 10:09 PM EDTFlash Flood WarningBGMSusquehanna, Wyoming3 hr
Jul 12, 10:28 PM EDTSpecial Weather StatementBGMWyoming32 min
Jul 12, 10:35 PM EDTSevere Thunderstorm WarningBGMLackawanna, Susquehanna, Wyoming40 min
Jul 12, 10:59 PM EDTAreal Flood AdvisoryBGMWayne2 hr
Jul 12, 11:09 PM EDTSevere Thunderstorm WarningBGMLackawanna, Pike, Susquehanna, Wayne51 min
Jul 12, 11:17 PM EDTAreal Flood AdvisoryBGMLackawanna, Susquehanna118 min
Jul 12, 11:38 PM EDTAreal Flood AdvisoryBGMLackawanna, Susquehanna, Wayne112 min
Jul 12, 11:58 PM EDTSpecial Weather StatementBGMLackawanna, Wayne47 min
Jul 13, 12:25 AM EDTAreal Flood AdvisoryBGMLackawanna, Luzerne2 hr
Jul 13, 12:54 AM EDTAreal Flood AdvisoryBGMLackawanna, Pike, Wayne2 hr
Jul 13, 1:33 AM EDTAreal Flood AdvisoryBGMLackawanna81 min
Jul 13, 12:48 PM EDTFlash Flood WatchBGMBradford, Lackawanna, Luzerne, Susquehanna, Wyoming11 hr

Nearby

Flash Flood Warnings in Pennsylvania, 2021Every 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.