Alert archive / Pennsylvania / Flash Flood Warnings in 2003

Flash Flood Warning 4, NWS Philadelphia/Mount Holly

June 12, 2003Monroe County, Pennsylvania

NWS Philadelphia/Mount Holly issued this flash flood warning at Jun 12, 2003, 2:37 AM EDT for 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: Jun 12, 2003, 2:37 AM EDT (06:37 UTC)
Expired: Jun 12, 2003, 5:30 AM EDT
In force: 3 hr
Issued by: NWS Philadelphia/Mount Holly
Area: Counties, with a storm outline in the text

County Monroe County, PA

The nearest sounding before it

Brookhaven, NY (KOKX), launched 00:00Z, 6.6 hours before the alert went out and 206 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: 30 J/kg
Mixed-layer CIN: -103 J/kg
Mixed-layer LCL: 987 m above ground
0-6 km bulk shear: 28 kt
0-1 km storm-relative helicity: 128 m²/s²
0-3 km storm-relative helicity: 159 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 120639
FFWPHI
PAC089-120930-

BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE MOUNT HOLLY NJ
237 AM EDT THU JUN 12 2003

THE NATIONAL WEATHER SERVICE IN MOUNT HOLLY NJ HAS ISSUED A

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

* UNTIL 530 AM EDT.

* AT 232 AM EDT...WEATHER SERVICE RADAR INDICATED SHOWERS AND 
SCATTERED THUNDERSTORMS CONTINUALLY MOVING OVER THE SAME AREAS OF 
THE POCONOS. THIS HAS CAUSED RAINFALL RATES OF 2 INCHES PER HOUR IN 
MONROE COUNTY.

THE HEAVY RAIN WILL CAUSE RAPID RUNOFF AND FLASH FLOODING OF SMALL 
STREAMS.

REMEMBER...DO NOT DRIVE THROUGH FLOODED AREAS...THE WATER MAY BE 
DEEPER THAN YOU THINK.

BE ESPECIALLY CAUTIOUS AT NIGHT WHEN IT IS HARDER TO RECOGNIZE THE
DANGERS OF FLOODS AND FLASH FLOODS. IF FLASH FLOODING IS OBSERVED ACT
QUICKLY. MOVE UP TO HIGHER GROUND TO ESCAPE FLOOD WATERS. DO NOT STAY
IN AREAS SUBJECT TO FLOODING WHEN WATER BEGINS RISING.

FOR THE LATEST STORM INFORMATION...PLEASE TUNE TO NOAA WEATHER 
RADIO...YOUR LOCAL RADIO OR TELEVISION STATION...OR YOUR CABLE 
TELEVISION OUTLET.

LAT...LON 4122 7521 4101 7512 4084 7548 4123 7550

$$

RNS

1 follow-up statement

000 
WGUS71 KPHI 120808
FFSPHI
PAC089-120830-

FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE MOUNT HOLLY NJ
407 AM EDT THU JUN 12 2003

...THE FLASH FLOOD WARNING FOR MONROE COUNTY IS BEING CANCELED...

THE HEAVY RAIN HAS MOVED OUT OF THE COUNTY AND ANY FLOODING THAT 
OCCURRED EARLIER SHOULD END. 

BE ESPECIALLY CAUTIOUS AT NIGHT WHEN IT IS HARDER TO RECOGNIZE THE
DANGERS OF FLOODS AND FLASH FLOODS. IF FLASH FLOODING IS OBSERVED...
ACT QUICKLY. MOVE UP TO HIGHER GROUND TO ESCAPE FLOOD WATERS. DO NOT
STAY IN AREAS SUBJECT TO FLOODING WHEN THE WATER BEGINS RISING.

STAY TUNED TO NOAA WEATHER RADIO OR OTHER MEDIA FOR THE LATEST SEVERE
WEATHER INFORMATION.

$$

RNS

The office that day

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

Issued	Product	Office	Counties	Lasted
Jun 12, 2:16 AM EDT	Flash Flood Warning	PHI	Carbon	119 min

Nearby

Flash Flood Warnings in Pennsylvania, 2003 Every flash flood warning in 2003

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.