Alert archive / Pennsylvania / Flash Flood Warnings in 2009

Flash Flood Warning 44, NWS Philadelphia/Mount Holly

August 19, 2009Monroe County, Pennsylvania

NWS Philadelphia/Mount Holly issued this flash flood warning at Aug 19, 2009, 5:04 PM EDT for Monroe County, Pennsylvania. It was in force for 115 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 19, 2009, 5:04 PM EDT (21:04 UTC)
Expired: Aug 19, 2009, 6:59 PM EDT
In force: 115 min
Issued by: NWS Philadelphia/Mount Holly
Area: Storm-based polygon
Flood severity: None

County Monroe County, PA

The radar

The Binghamton radar (KBGM), 137 km from the middle of the area, began a volume at 21:04 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 12:00Z, 9.1 hours before the alert went out and 194 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: 428 J/kg
Mixed-layer CIN: -32 J/kg
Mixed-layer LCL: 738 m above ground
0-6 km bulk shear: 14 kt
0-1 km storm-relative helicity: 61 m²/s²
0-3 km storm-relative helicity: 94 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.

000 
WGUS51 KPHI 192104
FFWPHI
PAC089-192330-
/O.NEW.KPHI.FF.W.0044.090819T2104Z-090819T2330Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE MOUNT HOLLY NJ
504 PM EDT WED AUG 19 2009

THE NATIONAL WEATHER SERVICE IN MOUNT HOLLY NJ HAS ISSUED A

* FLASH FLOOD WARNING FOR...
  NORTHEASTERN MONROE COUNTY IN NORTHEAST PENNSYLVANIA...

* UNTIL 730 PM EDT

* AT 501 PM EDT...RAINFALL AMOUNTS ARE AROUND TWO AND A HALF INCHES
  IN THE VICINITY OF BROADHEAD AND PARADISE CREEK AREAS. ADDITIONAL
  HEAVY RAINS WILL FALL WITHIN THE NEXT HOUR AND A HALF.

* OTHER LOCATIONS IN THE WARNING INCLUDE BUT ARE NOT LIMITED TO
  HERNYVILLE...ALPINE MOUNTAIN...ANALOMINK...EAST STROUDSBURG AND
  ECHO LAKE

PRECAUTIONARY/PREPAREDNESS ACTIONS...

DO NOT DRIVE YOUR VEHICLE INTO AREAS WHERE THE WATER COVERS THE
ROADWAY. THE WATER DEPTH MAY BE TOO GREAT TO ALLOW YOUR CAR TO CROSS
SAFELY. MOVE TO HIGHER GROUND.

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. DO NOT ATTEMPT TO CROSS
SWIFTLY FLOWING WATERS OR WATERS OF UNKNOWN DEPTH BY FOOT OR BY
AUTOMOBILE.

&&

LAT...LON 4123 7513 4116 7516 4115 7509 4113 7507
      4108 7502 4095 7518 4106 7540 4124 7516

$$

EBERWINE

1 follow-up statement

000 
WGUS71 KPHI 192259
FFSPHI

FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE MOUNT HOLLY NJ
659 PM EDT WED AUG 19 2009

PAC089-192309-
/O.CAN.KPHI.FF.W.0044.000000T0000Z-090819T2330Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
MONROE PA-
659 PM EDT WED AUG 19 2009

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

THE HEAVY RAIN HAS MOVED SOUTH OF THE COUNTY AND WE HAVE NOT RECEIVED
ANY REPORTS AT THIS TIME OF FLOODING.

LAT...LON 4123 7513 4116 7516 4115 7509 4113 7507
      4108 7502 4095 7518 4106 7540 4124 7516

$$

EBERWINE

The office that day

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

Issued	Product	Office	Counties	Lasted
Aug 18, 8:35 PM EDT	Severe Thunderstorm Warning	PHI	Bucks, Montgomery, Philadelphia	70 min
Aug 19, 4:30 PM EDT	Areal Flood Advisory	PHI	Monroe	2 hr
Aug 19, 4:35 PM EDT	Severe Thunderstorm Warning	PHI	Monroe	55 min
Aug 19, 5:08 PM EDT	Severe Thunderstorm Warning	PHI	Carbon	37 min
Aug 19, 5:51 PM EDT	Areal Flood Advisory	PHI	Carbon	114 min

Nearby

Flash Flood Warnings in Pennsylvania, 2009 Every flash flood warning in 2009

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.