Alert archive / Pennsylvania / Areal Flood Advisories in 2012

Areal Flood Advisory 113, NWS Philadelphia/Mount Holly

August 1, 2012Monroe County, Pennsylvania

NWS Philadelphia/Mount Holly issued this areal flood advisory at Aug 1, 2012, 4:51 PM EDT for Monroe County, Pennsylvania. It was in force for 36 min.

The area

The outline as issued.

The facts

Issued: Aug 1, 2012, 4:51 PM EDT (20:51 UTC)
Expired: Aug 1, 2012, 5:27 PM EDT
In force: 36 min
Issued by: NWS Philadelphia/Mount Holly
Area: Storm-based polygon

County Monroe County, PA

The radar

The Binghamton radar (KBGM), 137 km from the middle of the area, began a volume at 20:53 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, 8.9 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: 140 J/kg
Mixed-layer CIN: -61 J/kg
Mixed-layer LCL: 893 m above ground
0-6 km bulk shear: 17 kt
0-1 km storm-relative helicity: 70 m²/s²
0-3 km storm-relative helicity: 85 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.

185 
WGUS81 KPHI 012051
FLSPHI

FLOOD ADVISORY
NATIONAL WEATHER SERVICE MOUNT HOLLY NJ
451 PM EDT WED AUG 1 2012

PAC089-020245-
/O.NEW.KPHI.FA.Y.0113.120801T2051Z-120802T0245Z/
/00000.N.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
MONROE PA-
451 PM EDT WED AUG 1 2012

THE NATIONAL WEATHER SERVICE IN MOUNT HOLLY NJ HAS ISSUED AN

* URBAN AND SMALL STREAM FLOOD ADVISORY FOR...
  NORTHEASTERN MONROE COUNTY IN NORTHEAST PENNSYLVANIA...

* UNTIL 1045 PM EDT

* AT 450 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  THUNDERSTORM PRODUCING VERY HEAVY RAIN NEAR ALPINE MOUNTAIN. AS  
  MUCH AS 2 INCHES OF RAIN COULD FALL WITH THIS STORM.

  THIS MUCH RAIN WILL RESULT IN STREET FLOODING...AS WELL AS SHARP 
  RISES ON CREEKS AND STREAMS.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A FLOOD ADVISORY MEANS RIVER OR STREAM FLOWS ARE ELEVATED OR PONDING
OF WATER IN URBAN OR OTHER AREAS IS OCCURRING OR IS IMMINENT.

IN HILLY TERRAIN THERE ARE HUNDREDS OF LOW WATER CROSSINGS WHICH ARE
POTENTIALLY DANGEROUS IN HEAVY RAIN. DO NOT ATTEMPT TO TRAVEL ACROSS
FLOODED ROADS. FIND ALTERNATE ROUTES. IT TAKES ONLY A FEW INCHES OF
SWIFTLY FLOWING WATER TO CARRY VEHICLES AWAY.

&&

LAT...LON 4125 7512 4115 7514 4115 7508 4110 7504
      4109 7501 4108 7501 4099 7526 4116 7540
      4126 7515

$$

HAYES

1 follow-up statement

924 
WGUS81 KPHI 012127
FLSPHI

FLOOD ADVISORY
NATIONAL WEATHER SERVICE MOUNT HOLLY NJ
527 PM EDT WED AUG 1 2012

PAC089-012137-
/O.CAN.KPHI.FA.Y.0113.000000T0000Z-120802T0245Z/
/00000.N.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
MONROE PA-
527 PM EDT WED AUG 1 2012

...THE URBAN AND SMALL STREAM FLOOD ADVISORY HAS BEEN CANCELLED FOR
NORTHEASTERN MONROE COUNTY...

THE AREA COVERED BY THE ADVISORY HAS BEEN UPGRADED TO A FLASH FLOOD 
WARNING. 

LAT...LON 4125 7512 4115 7514 4115 7508 4110 7504
      4109 7501 4108 7501 4099 7526 4116 7540
      4126 7515

$$

HAYES

The office that day

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

Issued	Product	Office	Counties	Lasted
Jul 31, 8:11 PM EDT	Special Weather Statement	PHI	Berks	64 min
Jul 31, 9:12 PM EDT	Special Weather Statement	PHI	Berks, Lehigh	63 min
Jul 31, 9:51 PM EDT	Coastal Flood Statement	PHI	Delaware, Philadelphia	5 hr
Aug 1, 1:02 AM EDT	Special Weather Statement	PHI	Chester	58 min
Aug 1, 2:03 PM EDT	Special Weather Statement	PHI	Chester	57 min
Aug 1, 2:27 PM EDT	Special Weather Statement	PHI	Bucks	63 min
Aug 1, 2:47 PM EDT	Areal Flood Advisory	PHI	Bucks	3 hr
Aug 1, 3:03 PM EDT	Special Weather Statement	PHI	Monroe	57 min
Aug 1, 3:31 PM EDT	Coastal Flood Statement	PHI	Delaware, Philadelphia	11 hr
Aug 1, 3:35 PM EDT	Special Weather Statement	PHI	Philadelphia	55 min
Aug 1, 4:07 PM EDT	Flash Flood Warning	PHI	Bucks, Montgomery	3 hr
Aug 1, 4:16 PM EDT	Special Weather Statement	PHI	Carbon, Monroe	59 min
Aug 1, 4:53 PM EDT	Special Weather Statement	PHI	Philadelphia	67 min
Aug 1, 5:06 PM EDT	Areal Flood Advisory	PHI	Montgomery, Philadelphia	12 min
Aug 1, 5:09 PM EDT	Flash Flood Warning	PHI	Montgomery, Philadelphia	3 hr
Aug 1, 5:22 PM EDT	Flash Flood Warning	PHI	Monroe	106 min
Aug 1, 5:34 PM EDT	Special Weather Statement	PHI	Carbon	56 min
Aug 1, 5:43 PM EDT	Special Weather Statement	PHI	Delaware, Montgomery	62 min
Aug 1, 5:46 PM EDT	Severe Thunderstorm Warning	PHI	Philadelphia	31 min
Aug 1, 5:50 PM EDT	Special Weather Statement	PHI	Montgomery	55 min
Aug 1, 5:53 PM EDT	Areal Flood Advisory	PHI	Carbon, Monroe	100 min
Aug 1, 5:55 PM EDT	Severe Thunderstorm Warning	PHI	Carbon, Monroe, Northampton	65 min
Aug 1, 6:08 PM EDT	Flash Flood Warning	PHI	Chester, Montgomery	2 hr
Aug 1, 6:16 PM EDT	Areal Flood Advisory	PHI	Philadelphia	46 min
Aug 1, 6:22 PM EDT	Special Weather Statement	PHI	Lehigh	53 min
Aug 1, 6:30 PM EDT	Areal Flood Advisory	PHI	Chester, Delaware	64 min
Aug 1, 6:53 PM EDT	Areal Flood Advisory	PHI	Lehigh, Northampton	69 min
Aug 1, 6:59 PM EDT	Special Weather Statement	PHI	Northampton	61 min
Aug 1, 7:32 PM EDT	Special Weather Statement	PHI	Chester	58 min
Aug 1, 7:49 PM EDT	Areal Flood Advisory	PHI	Chester	52 min

Nearby

Areal Flood Advisories in Pennsylvania, 2012 Every areal flood advisory 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.