Alert archive / New Jersey / Flash Flood Warnings in 2001

Flash Flood Warning 59, NWS Philadelphia/Mount Holly

August 13, 2001Mercer County, New Jersey

NWS Philadelphia/Mount Holly issued this flash flood warning at Aug 13, 2001, 7:12 PM EDT for Mercer County, New Jersey. 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 counties it named.

The facts

Issued
Aug 13, 2001, 7:12 PM EDT (23:12 UTC)
Expired
Aug 13, 2001, 10:00 PM EDT
In force
3 hr
Issued by
NWS Philadelphia/Mount Holly
Area
Whole counties

County Mercer County, NJ

The radar

The Philadelphia radar (KDIX), 45 km from the middle of the area, began a volume at 23:13 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

Phillips Aaf/Abe, MD (KAPG), launched 12:00Z, 11.2 hours before the alert went out and 150 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, Phillips Aaf/Abe, MD at 12:00Z on 2001-08-13Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 534 joules per kilogram.LCLLFCEL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°0°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Phillips Aaf/Abe, MD at 12:00Z on 2001-08-13The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 13 square meters per square second.193958Sfc1 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
534 J/kg
Mixed-layer CIN
-6 J/kg
Mixed-layer LCL
522 m above ground
0-6 km bulk shear
21 kt
0-1 km storm-relative helicity
13 m²/s²
0-3 km storm-relative helicity
41 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 132315
FFWPHI
NJC021-140200-

BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE MOUNT HOLLY NJ
712 PM EDT MON AUG 13 2001

THE NATIONAL WEATHER SERVICE IN MOUNT HOLLY NJ HAS ISSUED A

* FLASH FLOOD WARNING FOR...
  MERCER COUNTY IN CENTRAL NEW JERSEY

* UNTIL 1000 PM EDT.

* AT 702 PM EDT...WEATHER SERVICE RADAR INDICATED AN AREA OF
HEAVY RAIN OVER HUNTERDON COUNTY MOVING SOUTH. THIS AREA WILL
MOVE INTO MERCER COUNTY AND MAY PRODUCE RAINFALL AMOUNTS OF TWO
OR MORE INCHES IN AN HOURS TIME.

PERSONS LIVING ALONG SMALL STREAMS SHOULD MONITOR THE WEATHER
OVER THE NEXT COUPLE OF HOURS FOR UPDATES. MOTORISTS ARE ADVISED
NOT TO DRIVE THROUGH FLOODED STREETS.

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

$$
EBERWINE

LAT...LON 4039 7478 4026 7452 4019 7473 4032 7491

The office that day

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

IssuedProductOfficeCountiesLasted
Aug 12, 9:06 PM EDTFlash Flood WarningPHIMiddlesex114 min
Aug 13, 3:45 PM EDTFlash Flood WarningPHIOcean60 min
Aug 13, 3:56 PM EDTSevere Thunderstorm WarningPHISussex34 min
Aug 13, 4:40 PM EDTFlash Flood WarningPHIOcean95 min

Nearby

Flash Flood Warnings in New Jersey, 2001Every flash flood warning in 2001

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.