Alert archive / Delaware / Flash Flood Warnings in 2006

Flash Flood Warning 41, NWS Philadelphia/Mount Holly

July 5, 2006Sussex County, Delaware

NWS Philadelphia/Mount Holly issued this flash flood warning at Jul 5, 2006, 5:26 PM EDT for Sussex County, Delaware. It was in force for 4 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
Jul 5, 2006, 5:26 PM EDT (21:26 UTC)
Expired
Jul 5, 2006, 9:30 PM EDT
In force
4 hr
Issued by
NWS Philadelphia/Mount Holly
Area
Counties, with a storm outline in the text

County Sussex County, DE

The radar

The Dover AFB radar (KDOX), 15 km from the middle of the area, began a volume at 21:29 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

Wallops Is Stn, VA (KWAL), launched 12:00Z, 9.4 hours before the alert went out and 85 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 2006-07-05Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 1024 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, Wallops Is Stn, VA at 12:00Z on 2006-07-05The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 129 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
1024 J/kg
Mixed-layer CIN
-98 J/kg
Mixed-layer LCL
978 m above ground
0-6 km bulk shear
25 kt
0-1 km storm-relative helicity
129 m²/s²
0-3 km storm-relative helicity
102 m²/s²
Significant tornado parameter
0.2
Supercell composite
1.5

Open this sounding in Storm Lab

The text

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

000 
WGUS51 KPHI 052131
FFWPHI
DEC005-060130-

BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE MOUNT HOLLY NJ
526 PM EDT WED JUL 5 2006

THE NATIONAL WEATHER SERVICE IN MOUNT HOLLY NJ HAS ISSUED A

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

* UNTIL 930 PM EDT

* AT 521 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED
  SEVERAL THUNDERSTORMS MOVING THROUGH THE COUNTY AT THIS TIME WITH
  VERY HEAVY RAIN. ADDITIONAL HEAVY RAIN IS EXPECTED LATER THIS
  EVENING AS SHOWERS AND THUNDERSTORMS INCREASE IN COVERAGE AND
  RAINFALL MAY REACH ABOUT 3 TO 5 INCHES IN SOME ISOLATED SPOTS OF
  THE COUNTY. THE ENTIRE COUNTY IS NOT EXPERIENCING HEAVY RAIN AT
  THIS TIME BUT MAY LATER ON. 

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. VEHICLES CAUGHT IN RISING WATER SHOULD BE ABANDONED QUICKLY.
MOVE TO HIGHER GROUND.

A FLASH FLOOD WARNING MEANS THAT FLOODING IS IMMINENT OR OCCURRING.
IF YOU ARE IN THE WARNING AREA MOVE TO HIGHER GROUND IMMEDIATELY.
RESIDENTS LIVING ALONG STREAMS AND CREEKS SHOULD TAKE IMMEDIATE
PRECAUTIONS TO PROTECT LIFE AND PROPERTY. DO NOT ATTEMPT TO CROSS
SWIFTLY FLOWING WATERS OR WATERS OF UNKNOWN DEPTH BY FOOT OR BY
AUTOMOBILE.

LAT...LON 3877 7569 3847 7567 3848 7506 3874 7508
      3891 7534

$$

EBERWINE
1 follow-up statement
000 
WGUS71 KPHI 060029
FFSPHI

FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE MOUNT HOLLY NJ
826 PM EDT WED JUL 5 2006

DEC005-060130-
SUSSEX DE-
826 PM EDT WED JUL 5 2006

...A FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 930 PM EDT FOR
SUSSEX COUNTY...

AT 823 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR CONTINUED TO
INDICATE MODERATE TO HEAVY RAIN FALL OVER A GOOD PART OF SUSSEX
COUNTY, AND WILL CONTINUE FOR THE NEXT FEW HOURS.  

LOCATIONS IN THE WARNING INCLUDE BUT ARE NOT LIMITED TO REHOBOTH
BEACH...MILTON...LEWES...GEORGETOWN...ELLENDALE AND BRIDGEVILLE.
SOME AREAS MAY RECEIVE UP TO 1 OR 2 INCHES AN HOUR.

A FLASH FLOOD WATCH MEANS THAT CONDITIONS MAY DEVELOP THAT LEAD
TO FLASH FLOODING. FLASH FLOODING IS A VERY DANGEROUS SITUATION.
YOU SHOULD MONITOR LATER FORECASTS AND BE PREPARED TO TAKE ACTION
SHOULD FLASH FLOOD WARNINGS BE ISSUED. 

LAT...LON 3877 7569 3847 7567 3848 7506 3874 7508
      3891 7534

$$

EBERWINE

The office that day

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

IssuedProductOfficeCountiesLasted
Jul 5, 11:19 AM EDTFlash Flood WatchPHIKent, New Castle, Sussex16 hr
Jul 5, 2:42 PM EDTSevere Thunderstorm WarningPHIKent48 min
Jul 5, 6:15 PM EDTSevere Thunderstorm WarningPHISussex30 min

Nearby

Flash Flood Warnings in Delaware, 2006Every flash flood warning in 2006

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.