Alert archive / Pennsylvania / Flash Flood Warnings in 2011

Flash Flood Warning 34, NWS Philadelphia/Mount Holly

August 19, 2011Carbon County, Monroe County, Pennsylvania

NWS Philadelphia/Mount Holly issued this flash flood warning at Aug 19, 2011, 2:57 PM EDT for Carbon County, Monroe 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: Aug 19, 2011, 2:57 PM EDT (18:57 UTC)
Expired: Aug 19, 2011, 5:53 PM EDT
In force: 3 hr
Issued by: NWS Philadelphia/Mount Holly
Area: Storm-based polygon
Flood severity: None

Counties Carbon County, PA, Monroe County, PA

The radar

The Binghamton radar (KBGM), 128 km from the middle of the area, began a volume at 18:57 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

Phillips Aaf/Abe, MD (KAPG), launched 12:00Z, 7.0 hours before the alert went out and 187 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: 146 J/kg
Mixed-layer CIN: -154 J/kg
Mixed-layer LCL: 1250 m above ground
0-6 km bulk shear: 19 kt
0-1 km storm-relative helicity: 359 m²/s²
0-3 km storm-relative helicity: 370 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.

909 
WGUS51 KPHI 191857
FFWPHI
PAC025-089-192300-
/O.NEW.KPHI.FF.W.0034.110819T1857Z-110819T2300Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE MOUNT HOLLY NJ
257 PM EDT FRI AUG 19 2011

THE NATIONAL WEATHER SERVICE IN MOUNT HOLLY NJ HAS ISSUED A

* FLASH FLOOD WARNING FOR...
  NORTHERN CARBON COUNTY...
  NORTHERN MONROE COUNTY...

* UNTIL 700 PM EDT...

* AT 250 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED
  VERY HEAVY RAIN FROM THUNDERSTORMS OVER NORTHERN CARBON AND
  NORTHERN MONROE COUNTIES.

* LOCATIONS IN THE WARNING INCLUDE BUT ARE NOT LIMITED TO MOUNT
  POCONO...TOBYHANNA...BLAKESLEE AND EAST SIDE.

SOME LOCATIONS HAVE ALREADY RECEIVED 2 TO 3 INCHES OF RAIN. 
ADDITIONAL RAINFALL AMOUNTS OF 2 TO 3 INCHES ARE POSSIBLE IN THE 
WARNED AREA WITH LOCALLY HIGHER AMOUNTS.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 4126 7514 4116 7516 4115 7509 4109 7504
      4083 7592 4090 7600 4098 7586 4100 7575
      4105 7578 4110 7577 4114 7570 4113 7564
      4121 7557 4125 7550

$$

IOVINO

2 follow-up statements

943 
WGUS71 KPHI 191957
FFSPHI

FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE MOUNT HOLLY NJ
357 PM EDT FRI AUG 19 2011

PAC025-089-192300-
/O.CON.KPHI.FF.W.0034.000000T0000Z-110819T2300Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
CARBON PA-MONROE PA-
357 PM EDT FRI AUG 19 2011

...A FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 700 PM EDT FOR
NORTHERN MONROE AND NORTHERN CARBON COUNTIES...

AT 350 PM EDT...DOPPLER RADAR ESTIMATES CONTINUE TO INDICATE A
THUNDERSTORM PRODUCING VERY HEAVY RAIN OVER NORTHERN CARBON AND 
NORTHERN MONROE COUNTIES. ADDITIONAL HEAVY RAIN IS APPROACHING FROM 
THE WEST.

LOCATIONS IN THE WARNING INCLUDE BUT ARE NOT LIMITED TO MOUNT 
POCONO...TOBYHANNA...BLAKESLEE AND EAST SIDE.

SOME LOCATIONS HAVE ALREADY RECEIVED 2 TO 3 INCHES OF RAIN. 
ADDITIONAL RAINFALL AMOUNTS OF 2 TO 3 INCHES ARE POSSIBLE IN THE 
WARNED AREA WITH LOCALLY HIGHER AMOUNTS.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

PLEASE REPORT FLOODING...HAIL OR WIND DAMAGE BY CALLING YOUR LOCAL
LAW ENFORCEMENT OFFICIALS OR BY CALLING THE NATIONAL WEATHER SERVICE
TOLL FREE AT...1-877-633-6772.

&&

LAT...LON 4126 7514 4116 7516 4115 7509 4109 7504
      4083 7592 4090 7600 4098 7586 4100 7575
      4105 7578 4110 7577 4114 7570 4113 7564
      4121 7557 4125 7550

$$

IOVINO

208 
WGUS71 KPHI 192153
FFSPHI

FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE MOUNT HOLLY NJ
553 PM EDT FRI AUG 19 2011

PAC025-089-192201-
/O.CAN.KPHI.FF.W.0034.000000T0000Z-110819T2300Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
CARBON PA-MONROE PA-
553 PM EDT FRI AUG 19 2011

...THE FLASH FLOOD WARNING HAS BEEN CANCELLED FOR NORTHERN MONROE AND
NORTHERN CARBON COUNTIES...

AT 550 PM EDT...THE MODERATE TO HEAVY RAIN WAS CONTINUING TO MOVE 
OUT OF THE POCONO REGION. AS A RESULT...THE FLASH FLOOD WARNING HAS 
BEEN CANCELLED.

LAT...LON 4126 7514 4116 7516 4115 7509 4109 7504
      4083 7592 4090 7600 4098 7586 4100 7575
      4105 7578 4110 7577 4114 7570 4113 7564
      4121 7557 4125 7550

$$

IOVINO

The office that day

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

Issued	Product	Office	Counties	Lasted
Aug 18, 8:08 PM EDT	Special Weather Statement	PHI	Berks	67 min
Aug 18, 8:26 PM EDT	Areal Flood Advisory	PHI	Bucks, Chester, Delaware, Montgomery, Philadelphia	112 min
Aug 18, 8:31 PM EDT	Severe Thunderstorm Warning	PHI	Bucks, Montgomery	59 min
Aug 18, 8:48 PM EDT	Special Weather Statement	PHI	Monroe	57 min
Aug 18, 8:48 PM EDT	Severe Thunderstorm Warning	PHI	Bucks	57 min
Aug 19, 12:02 AM EDT	Special Weather Statement	PHI	Chester	58 min
Aug 19, 12:50 AM EDT	Special Weather Statement	PHI	Chester, Delaware	40 min
Aug 19, 1:14 AM EDT	Areal Flood Advisory	PHI	Bucks, Chester, Delaware, Montgomery, Philadelphia	3 hr
Aug 19, 1:31 AM EDT	Special Weather Statement	PHI	Delaware, Philadelphia	59 min
Aug 19, 4:00 AM EDT	Areal Flood Warning	PHI	Delaware	4 hr
Aug 19, 1:46 PM EDT	Severe Thunderstorm Warning	PHI	Monroe	59 min
Aug 19, 2:35 PM EDT	Severe Thunderstorm Warning	PHI	Carbon, Monroe	70 min
Aug 19, 2:38 PM EDT	Areal Flood Advisory	PHI	Carbon, Monroe	3 hr
Aug 19, 3:47 PM EDT	Severe Thunderstorm Warning	PHI	Carbon, Monroe	58 min
Aug 19, 4:29 PM EDT	Severe Thunderstorm Warning	PHI	Carbon, Lehigh, Monroe, Northampton	61 min
Aug 19, 4:32 PM EDT	Areal Flood Advisory	PHI	Berks, Lehigh, Northampton	2 hr
Aug 19, 4:52 PM EDT	Severe Thunderstorm Warning	PHI	Berks, Bucks, Lehigh, Montgomery, Northampton	53 min
Aug 19, 5:35 PM EDT	Severe Thunderstorm Warning	PHI	Chester	55 min
Aug 19, 5:39 PM EDT	Areal Flood Advisory	PHI	Chester, Delaware	3 hr
Aug 19, 5:42 PM EDT	Severe Thunderstorm Warning	PHI	Chester, Montgomery	48 min
Aug 19, 5:45 PM EDT	Areal Flood Advisory	PHI	Bucks, Montgomery, Philadelphia	3 hr
Aug 19, 5:59 PM EDT	Severe Thunderstorm Warning	PHI	Bucks	80 min
Aug 19, 6:14 PM EDT	Severe Thunderstorm Warning	PHI	Bucks, Chester, Delaware, Montgomery, Philadelphia	65 min

Nearby

Flash Flood Warnings in Pennsylvania, 2011 Every flash flood warning in 2011

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.