Alert archive / Delaware / Flash Flood Warnings in 2002

Flash Flood Warning 24, NWS Philadelphia/Mount Holly

July 27, 2002Sussex County, Delaware

NWS Philadelphia/Mount Holly issued this flash flood warning at Jul 27, 2002, 6:05 PM EDT for Sussex County, Delaware. It was in force for 115 min. No storm report in the archive falls inside the area while it was in force.

The area

The counties it named.

The facts

Issued
Jul 27, 2002, 6:05 PM EDT (22:05 UTC)
Expired
Jul 27, 2002, 8:00 PM EDT
In force
115 min
Issued by
NWS Philadelphia/Mount Holly
Area
Whole counties

County Sussex County, DE

The nearest sounding before it

Wallops Is Stn, VA (KWAL), launched 12:00Z, 10.1 hours before the alert went out and 84 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, Wallops Is Stn, VA at 12:00Z on 2002-07-27Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 1091 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, Wallops Is Stn, VA at 12:00Z on 2002-07-27The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 79 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
1091 J/kg
Mixed-layer CIN
-4 J/kg
Mixed-layer LCL
490 m above ground
0-6 km bulk shear
27 kt
0-1 km storm-relative helicity
79 m²/s²
0-3 km storm-relative helicity
93 m²/s²
Significant tornado parameter
0.3
Supercell composite
1.6

Open this sounding in Storm Lab

The text

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

000 
WGUS51 KPHI 272205
FFWPHI
DEC005-280000-

BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE MOUNT HOLLY NJ
603 PM EDT SAT JUL 27 2002

THE NATIONAL WEATHER SERVICE IN MOUNT HOLLY NJ HAS ISSUED A

* FLASH FLOOD WARNING FOR...
  EASTERN SUSSEX COUNTY IN SOUTHERN DELAWARE

* UNTIL 800 PM EDT.

* AT 559 PM EDT...WEATHER SERVICE RADAR INDICATED..THUNDERSTORMS
  WITH TORRENTIAL RAINS THAT HAVE AND WILL BE MOVING OVER THE SAME
  AREAS IN THE EASTERN HALF OF THE SUSSEX COUNTY FROM OAKLEY
  SOUTHEAST TO FENWICK ISLAND. DOPPER RADAR STORM TOTAL ESTIMATES
  HAVE REACHED BETWEEN 3 AND 5 INCHES IN NORTHERN SUSSEX COUNTY.

EXCESSIVE RUNOFF FROM THIS STORM WILL CAUSE FLASH FLOODING OF SMALL
CREEKS AND STREAMS...COUNTRY ROADS...AS WELL AS FARMLAND ALONG THE
BANKS OF CREEKS AND STREAMS.

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

$$

LAT...LON 3885 7506 3842 7501 3848 7545 3883 7554

TFG

Nearby

Flash Flood Warnings in Delaware, 2002Every flash flood warning in 2002

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.