Alert archive / Pennsylvania / Flash Flood Warnings in 2005

Flash Flood Warning 1, NWS Philadelphia/Mount Holly

April 7, 2005Berks County, Lehigh County, Pennsylvania

NWS Philadelphia/Mount Holly issued this flash flood warning at Apr 7, 2005, 10:30 PM EDT for Berks County, Lehigh County, Pennsylvania. It was in force for 5 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
Apr 7, 2005, 10:30 PM EDT (02:30 UTC)
Expired
Apr 8, 2005, 3:00 AM EDT
In force
5 hr
Issued by
NWS Philadelphia/Mount Holly
Area
Counties, with a storm outline in the text

Counties Berks County, PA, Lehigh County, PA

The radar

The Philadelphia radar (KDIX), 133 km from the middle of the area, began a volume at 02:34 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

Washington/Dulle, VA (KIAD), launched 00:00Z, 2.5 hours before the alert went out and 211 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-pSkew-T log-p diagram, Washington/Dulle, VA at 00:00Z on 2005-04-08Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 55 joules per kilogram.LCLLFCEL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Washington/Dulle, VA at 00:00Z on 2005-04-08The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 212 square meters per square second.19395878Sfc1 km3 km6 km9 kmRMLM
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
55 J/kg
Mixed-layer CIN
-33 J/kg
Mixed-layer LCL
801 m above ground
0-6 km bulk shear
42 kt
0-1 km storm-relative helicity
212 m²/s²
0-3 km storm-relative helicity
207 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.2

Open this sounding in Storm Lab

The text

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

000 
WGUS51 KPHI 080231
FFWPHI
PAC011-077-080700-

BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE MOUNT HOLLY NJ
1030 PM EDT THU APR 7 2005

THE NATIONAL WEATHER SERVICE IN MOUNT HOLLY NJ HAS ISSUED A

* FLASH FLOOD WARNING FOR...
  BERKS COUNTY IN EASTERN PENNSYLVANIA
  LEHIGH COUNTY IN EASTERN PENNSYLVANIA

* UNTIL 300 AM EDT

* AT 1030 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED
  RAINFALL TOTALS AROUND ONE INCH IN MUCH OF BERKS COUNTY AND IN
  PARTS OF LEHIGH COUNTY.  MODERATE TO HEAVY RAIN WILL CONTINUE IN 
  THE TWO COUNTIES UNTIL SHORTLY AFTER MIDNIGHT WITH AN ADDITIONAL 
  HALF INCH OF RAIN EXPECTED.

FLOODING IS LIKELY ALONG SMALL STREAMS AND CREEKS AND IN AREAS OF 
POOR DRAINAGE.

IF YOU LIVE NEAR A SMALL STREAM OR CREEK OR NEAR AN AREA OF POOR 
DRAINAGE, KEEP WATCH ON THE WATER LEVELS DURING THE NEXT FEW HOURS.

DO NOT DRIVE THROUGH FLOOD WATERS, THE WATER MAY BE DEEPER THAN YOU 
THINK IT IS.

LAT...LON 4018 7591 4053 7541 4074 7565 4048 7633

$$

IOVINO
1 follow-up statement
000 
WGUS71 KPHI 080506
FFSPHI

FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE MOUNT HOLLY NJ
105 AM EDT FRI APR 8 2005

PAC011-077-080700-
BERKS PA-LEHIGH PA-
105 AM EDT FRI APR 8 2005

...A FLASH FLOOD WARNING CONTINUES UNTIL 300 AM EDT FOR BERKS COUNTY 
AND LEHIGH COUNTY...

AT 100 AM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED 
RAINFALL OF AN INCH TO AN INCH AND A HALF IN MUCH OF BERKS COUNTY 
AND LEHIGH COUNTY.

AT 100 AM EDT...THE RAIN WAS MOVING OUT OF THE TWO COUNTIES.  LITTLE 
ADDITIONAL RAINFALL IS ANTICIPATED.  HOWEVER, RUNOFF FROM THE 
MODERATE TO HEAVY RAIN DURING THE PAST FEW HOURS MAY CONTINUE TO 
RESULT IN FLOODING ALONG SMALL STREAMS AND CREEKS AND IN AREAS OF 
POOR DRAINAGE FOR THE NEXT COUPLE OF HOURS.  AS A RESULT, THE FLASH 
FLOOD WARNING WILL REMAIN IN EFFECT UNTIL 300 AM AT WHICH TIME IT 
WILL BE ALLOWED TO EXPIRE.

LAT...LON 4018 7591 4053 7541 4074 7565 4048 7633

$$

IOVINO

The office that day

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

IssuedProductOfficeCountiesLasted
Apr 7, 11:25 PM EDTFlash Flood WarningPHIBucks, Northampton6 hr

Nearby

Flash Flood Warnings in Pennsylvania, 2005Every flash flood warning in 2005

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.