Alert archive / Pennsylvania / Flash Flood Warnings in 2012

Flash Flood Warning 32, NWS Philadelphia/Mount Holly

August 9, 2012Monroe County, Pennsylvania

NWS Philadelphia/Mount Holly issued this flash flood warning at Aug 9, 2012, 10:25 PM EDT for Monroe County, Pennsylvania. It was in force for 83 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: Aug 9, 2012, 10:25 PM EDT (02:25 UTC)
Expired: Aug 9, 2012, 11:48 PM EDT
In force: 83 min
Issued by: NWS Philadelphia/Mount Holly
Area: Storm-based polygon
Flood severity: None

County Monroe County, PA

The radar

The Binghamton radar (KBGM), 139 km from the middle of the area, began a volume at 02:28 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

Brookhaven, NY (KOKX), launched 00:00Z, 2.4 hours before the alert went out and 193 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: 895 J/kg
Mixed-layer CIN: -57 J/kg
Mixed-layer LCL: 908 m above ground
0-6 km bulk shear: 14 kt
0-1 km storm-relative helicity: 38 m²/s²
0-3 km storm-relative helicity: 47 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

As transmitted, in the capitals the NWS used until 2016.

001 
WGUS51 KPHI 100225
FFWPHI
PAC089-100500-
/O.NEW.KPHI.FF.W.0032.120810T0225Z-120810T0500Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE MOUNT HOLLY NJ
1025 PM EDT THU AUG 9 2012

THE NATIONAL WEATHER SERVICE IN MOUNT HOLLY NJ HAS ISSUED A

* FLASH FLOOD WARNING FOR...
  EASTERN MONROE COUNTY...

* UNTIL 100 AM EDT...

* AT 1020 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED
  VERY HEAVY RAIN FROM A THUNDERSTORM OVER EASTERN MONROE COUNTY.
  RAINFALL ESTIMATES HAVE EXCEEDED TWO INCHES. 

* LOCATIONS IN THE WARNING INCLUDE BUT ARE NOT LIMITED TO THE 
  UPPER REACHES OF THE BRODHEAD AND PARADISE CREEKS DRAINAGE BASIN. 
  THE FLASH FLOOD WARNING REPLACES THE FLOOD ADVISORY.

ADDITIONAL RAINFALL AMOUNTS OF 1 TO 2 INCHES ARE POSSIBLE IN
THE WARNED AREA.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A FLASH FLOOD WARNING MEANS THAT FLOODING IS IMMINENT OR OCCURRING.
IF YOU ARE IN THE WARNING AREA MOVE TO HIGHER GROUND IMMEDIATELY.
RESIDENTS LIVING ALONG STREAMS AND CREEKS SHOULD TAKE IMMEDIATE
PRECAUTIONS TO PROTECT LIFE AND PROPERTY. NEVER ATTEMPT TO CROSS
SWIFTLY FLOWING WATERS OR WATERS OF UNKNOWN DEPTH BY FOOT OR IN AN
AUTOMOBILE. TURN AROUND DON'T DROWN!

PLEASE REPORT FLOODING...HAIL OR WIND DAMAGE TO THE NATIONAL WEATHER
SERVICE BY CALLING TOLL FREE...1-877-633-6772.

BE ESPECIALLY CAUTIOUS AT NIGHT WHEN IT IS HARDER TO RECOGNIZE THE
DANGERS OF FLOODING. IF FLASH FLOODING IS OBSERVED ACT QUICKLY. MOVE
UP TO HIGHER GROUND TO ESCAPE FLOOD WATERS. DO NOT STAY IN AREAS
SUBJECT TO FLOODING WHEN WATER BEGINS RISING.

&&

LAT...LON 4124 7512 4116 7515 4115 7508 4109 7503
      4110 7500 4108 7497 4103 7505 4100 7511
      4097 7514 4092 7528 4121 7544 4125 7530
      4126 7513

$$
 
TFG

1 follow-up statement

623 
WGUS71 KPHI 100348
FFSPHI

FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE MOUNT HOLLY NJ
1148 PM EDT THU AUG 9 2012

PAC089-100358-
/O.CAN.KPHI.FF.W.0032.000000T0000Z-120810T0500Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
MONROE PA-
1148 PM EDT THU AUG 9 2012

...THE FLASH FLOOD WARNING HAS BEEN CANCELLED FOR EASTERN MONROE
COUNTY...

THE WATERS FROM THE EARLIER HEAVY RAINS ARE RECEDING AND FLOOD WATERS
NO LONGER POSE A THREAT TO LIFE OR PROPERTY. THEREFORE...THE FLASH
FLOOD WARNING HAS BEEN CANCELLED.

LOCATIONS IN THE WARNING INCLUDE BUT ARE NOT LIMITED TO RURAL AREAS
OF EASTERN MONROE COUNTY.

LAT...LON 4124 7512 4116 7515 4115 7508 4109 7503
      4110 7500 4108 7497 4103 7505 4100 7511
      4097 7514 4092 7528 4121 7544 4125 7530
      4126 7513

$$

FORECASTER: HEAVENER

The office that day

Everything else NWS Philadelphia/Mount Holly issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
Aug 9, 8:24 PM EDT	Special Weather Statement	PHI	Berks, Lehigh	66 min
Aug 9, 9:24 PM EDT	Special Weather Statement	PHI	Monroe	96 min
Aug 9, 10:05 PM EDT	Special Weather Statement	PHI	Berks	55 min
Aug 9, 10:09 PM EDT	Areal Flood Advisory	PHI	Monroe	98 min
Aug 10, 7:40 AM EDT	Areal Flood Advisory	PHI	Berks, Carbon, Chester, Lehigh, Monroe, Montgomery and 1 more	3 hr
Aug 10, 8:41 AM EDT	Special Weather Statement	PHI	Bucks, Delaware, Monroe, Montgomery, Northampton, Philadelphia	94 min
Aug 10, 8:43 AM EDT	Special Weather Statement	PHI	Bucks, Delaware, Monroe, Montgomery, Northampton, Philadelphia	92 min
Aug 10, 9:08 AM EDT	Areal Flood Advisory	PHI	Bucks, Chester, Delaware, Lehigh, Monroe, Montgomery and 2 more	3 hr
Aug 10, 10:05 AM EDT	Special Weather Statement	PHI	Bucks, Delaware, Montgomery, Philadelphia	115 min
Aug 10, 10:33 AM EDT	Areal Flood Advisory	PHI	Bucks	4 hr
Aug 10, 12:10 PM EDT	Special Weather Statement	PHI	Bucks	80 min

Nearby

Flash Flood Warnings in Pennsylvania, 2012 Every flash flood warning in 2012

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.