Alert archive / Pennsylvania / Flash Flood Warnings in 2014

Flash Flood Warning 9, NWS Philadelphia/Mount Holly

June 13, 2014Cecil County, Maryland; 5 counties in Pennsylvania

NWS Philadelphia/Mount Holly issued this flash flood warning at Jun 13, 2014, 1:48 PM EDT for Cecil County, Maryland; 5 counties in Pennsylvania. It was in force for 4 hr. 6 reports came from inside the area while it was in force.

The area

The outline as issued, with what was reported inside it.

The facts

Issued: Jun 13, 2014, 1:48 PM EDT (17:48 UTC)
Expired: Jun 13, 2014, 5:45 PM EDT
In force: 4 hr
Issued by: NWS Philadelphia/Mount Holly
Area: Storm-based polygon
Flood severity: None

Counties Cecil County, MD, Berks County, PA, Bucks County, PA, Chester County, PA, Lehigh County, PA, Montgomery County, PA

The radar

The Philadelphia radar (KDIX), 117 km from the middle of the area, began a volume at 17:50 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.

What was reported inside it

Time	Report	Where	Remark
Jun 13, 3:00 PM EDT	FLASH FLOOD	New Hanover, PA	THE INTERSECTION OF NORTH CHARLOTTE STREET AND KLEMON ROAD WERE REPORTED TO BE FLOODED.
Jun 13, 3:00 PM EDT	FLASH FLOOD	Upper Pottsgrove Twp, PA	PINE FORD ROAD AT ROUTE 100 WAS REPORTED TO BE FLOODED.
Jun 13, 4:00 PM EDT	FLOOD	Alburtis, PA	WATER FROM MILL CREEK COVERING PART OF INDIAN CREEK RD.
Jun 13, 4:00 PM EDT	FLOOD	Emmaus, PA	WATER FROM INDIAN CREEK COVERING PART OF INDIAN CREEK RD.
Jun 13, 4:00 PM EDT	FLOOD	Emmaus, PA	WATER FROM INDIAN CREEK COVERING PART OF INDIAN CREEK RD.
Jun 13, 4:47 PM EDT	HEAVY RAIN 2.86	Gilbertsville, PA	ONE INCH OF RAIN WAS RECORDED IN THIRTY MINUTES.

Local storm reports filed while the alert was in force, from inside its polygon or its counties.

The nearest sounding before it

Washington/Dulle, VA (KIAD), launched 12:00Z, 5.8 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: 523 J/kg
Mixed-layer CIN: -2 J/kg
Mixed-layer LCL: 527 m above ground
0-6 km bulk shear: 21 kt
0-1 km storm-relative helicity: 5 m²/s²
0-3 km storm-relative helicity: 36 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.1

Open this sounding in Storm Lab

The text

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

484 
WGUS51 KPHI 131748
FFWPHI
MDC015-PAC011-017-029-077-091-132145-
/O.NEW.KPHI.FF.W.0009.140613T1748Z-140613T2145Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE MOUNT HOLLY NJ
148 PM EDT FRI JUN 13 2014

THE NATIONAL WEATHER SERVICE IN MOUNT HOLLY NJ HAS ISSUED A

* FLASH FLOOD WARNING FOR...
  SOUTHEASTERN BERKS COUNTY IN EASTERN PENNSYLVANIA...
  EASTERN LEHIGH COUNTY IN EASTERN PENNSYLVANIA...
  THIS INCLUDES THE CITY OF ALLENTOWN...
  NORTHWESTERN CECIL COUNTY IN NORTHEAST MARYLAND...
  THIS INCLUDES THE CITY OF NORTHEAST...
  NORTHWESTERN BUCKS COUNTY IN SOUTHEAST PENNSYLVANIA...
  CHESTER COUNTY IN SOUTHEAST PENNSYLVANIA...
  WESTERN MONTGOMERY COUNTY IN SOUTHEAST PENNSYLVANIA...

* UNTIL 545 PM EDT

* AT 148 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR WAS SHOWING 
  THUNDERSTORMS ENTERING THE WARNED AREA. THESE THUNDERSTORMS WERE   
  PRODUCING HEAVY RAIN. ONE TO THREE INCHES PER HOUR CAN BE EXPECTED 
  WITH THE MOST INTENSE STORMS. THIS AMOUNT OF RAIN IN A ONE HOUR    
  TIME FRAME WILL LEAD TO FLOODING.

* LOCATIONS IN THE WARNING INCLUDE BUT ARE NOT LIMITED TO
  GILBERTSVILLE...EMMAUS...EAST GREENVILLE...ANCIENT OAKS...
  ZIONSVILLE...TOPTON...QUAKERTOWN...PLEASANT VALLEY...PERKASIE...
  GREEN LANE...GERYVILLE...COFFEETOWN...BECHTELSVILLE AND BALLY

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.

&&

LAT...LON 3973 7614 3979 7605 3988 7599 4011 7595
      4014 7589 4021 7599 4073 7553 4066 7548
      4067 7543 4063 7539 4058 7541 4054 7534
      4055 7530 4056 7530 4044 7517 3954 7599
      3954 7607 3956 7610 3957 7608 3972 7623

$$

KRUZDLO

1 follow-up statement

379 
WGUS71 KPHI 132045
FFSPHI

FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE MOUNT HOLLY NJ
445 PM EDT FRI JUN 13 2014

MDC015-PAC011-017-029-077-091-132054-
/O.CAN.KPHI.FF.W.0009.000000T0000Z-140613T2145Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
BERKS PA-BUCKS PA-LEHIGH PA-MONTGOMERY PA-CECIL MD-CHESTER PA-
445 PM EDT FRI JUN 13 2014

...THE FLASH FLOOD WARNING HAS BEEN CANCELLED FOR CHESTER...
NORTHWESTERN CECIL...WESTERN MONTGOMERY...EASTERN LEHIGH...
NORTHWESTERN BUCKS AND SOUTHEASTERN BERKS COUNTIES...

THE HEAVY RAIN HAS MOVED OUT OF THE AREA. THERE WERE SOME FLOODED 
ROADWAYS IN THE NEW HANOVER AND UPPER POTTSGROVE AREA. EMERGENCY 
MANAGEMENT INDICATED THAT THE FLOODING HAS DIMINISHED.


LAT...LON 3973 7614 3979 7605 3988 7599 4011 7595
      4014 7589 4021 7599 4073 7553 4066 7548
      4067 7543 4063 7539 4058 7541 4054 7534
      4055 7530 4056 7530 4044 7517 3954 7599
      3954 7607 3956 7610 3957 7608 3972 7623

$$

KRUZDLO

The office that day

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

Issued	Product	Office	Counties	Lasted
Jun 13, 2:16 PM EDT	Special Weather Statement	PHI	Cecil, Kent	119 min
Jun 13, 3:16 PM EDT	Areal Flood Advisory	PHI	Cecil, Kent, Queen Anne's	4 hr
Jun 13, 3:37 PM EDT	Areal Flood Advisory	PHI	Caroline, Queen Anne's	4 hr
Jun 13, 4:17 PM EDT	Special Weather Statement	PHI	Caroline, Queen Anne's, Talbot	58 min
Jun 13, 3:25 AM EDT	Special Weather Statement	PHI	Bucks, Lehigh	65 min
Jun 13, 4:28 AM EDT	Special Weather Statement	PHI	Lehigh, Northampton	62 min
Jun 13, 4:46 AM EDT	Areal Flood Advisory	PHI	Berks, Chester, Lehigh, Montgomery	3 hr
Jun 13, 6:17 AM EDT	River Flood Warning	PHI	Chester	4 hr
Jun 13, 6:41 AM EDT	Areal Flood Warning	PHI	Berks, Bucks, Chester, Lehigh, Montgomery	15 hr
Jun 13, 11:54 AM EDT	Flash Flood Watch	PHI	Berks, Bucks, Carbon, Chester, Delaware, Lehigh and 4 more	11 hr
Jun 13, 12:36 PM EDT	Special Weather Statement	PHI	Berks	69 min
Jun 13, 1:25 PM EDT	Flash Flood Warning	PHI	Berks, Carbon, Lehigh, Monroe, Northampton	4 hr
Jun 13, 1:48 PM EDT	Severe Thunderstorm Warning	PHI	Berks, Lehigh	57 min
Jun 13, 2:34 PM EDT	Severe Thunderstorm Warning	PHI	Berks, Bucks, Lehigh, Montgomery	48 min
Jun 13, 2:42 PM EDT	Severe Thunderstorm Warning	PHI	Lehigh, Northampton	63 min
Jun 13, 2:52 PM EDT	Areal Flood Advisory	PHI	Bucks, Monroe, Northampton	4 hr
Jun 13, 3:14 PM EDT	Special Weather Statement	PHI	Bucks, Monroe, Montgomery, Northampton	2 hr
Jun 13, 3:38 PM EDT	Severe Thunderstorm Warning	PHI	Bucks, Northampton	52 min
Jun 13, 3:52 PM EDT	Special Weather Statement	PHI	Delaware, Philadelphia	53 min
Jun 13, 4:58 PM EDT	Severe Thunderstorm Warning	PHI	Philadelphia	23 min
Jun 13, 5:04 PM EDT	Areal Flood Advisory	PHI	Bucks	4 hr

Nearby

Flash Flood Warnings in Pennsylvania, 2014 Flash Flood Warnings in Maryland, 2014 Every flash flood warning in 2014

Sources

The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.