Alert archive / Delaware / Flash Flood Warnings in 2005

Flash Flood Warning 26, NWS Philadelphia/Mount Holly

October 8, 2005New Castle County, Delaware

NWS Philadelphia/Mount Holly issued this flash flood warning at Oct 8, 2005, 8:35 AM EDT for New Castle County, Delaware. 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
Oct 8, 2005, 8:35 AM EDT (12:35 UTC)
Expired
Oct 8, 2005, 11:30 AM EDT
In force
3 hr
Issued by
NWS Philadelphia/Mount Holly
Area
Counties, with a storm outline in the text

County New Castle County, DE

The radar

The Dover AFB radar (KDOX), 92 km from the middle of the area, began a volume at 12:39 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 12:00Z, 0.6 hours before the alert went out and 170 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 12:00Z on 2005-10-08Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 3 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 12:00Z on 2005-10-08The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 15 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
3 J/kg
Mixed-layer CIN
-13 J/kg
Mixed-layer LCL
451 m above ground
0-6 km bulk shear
38 kt
0-1 km storm-relative helicity
15 m²/s²
0-3 km storm-relative helicity
118 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 081239
FFWPHI
DEC003-081530-

BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE MOUNT HOLLY NJ
835 AM EDT SAT OCT 8 2005

THE NATIONAL WEATHER SERVICE IN MOUNT HOLLY NJ HAS ISSUED A

* FLASH FLOOD WARNING FOR...
  NEW CASTLE COUNTY IN NORTHERN DELAWARE
  THIS INCLUDES THE CITIES OF...WILMINGTON...NEWARK

* UNTIL 1130 AM EDT

* AT 836 AM EDT...NATIONAL WEATHER SERVICE RADAR INDICATED HEAVY 
  HEAVY RAIN OVER NEW CASTLE COUNTY. RADAR ESTIMATED RAINFALL WAS
  OVER 2 INCHES FELL SINCE THE RAIN BEGAN. ANOTHER INCH OR TWO OF 
  RAIN COULD FALL IN THE NEXT 3 HOURS.

IN ADDITION, THE CHRISTINA RIVER WAS UP TO 9.55 FEET AND HAD LEVELED 
OFF FROM EARLIER HEAVY RAIN. HOWEVER, AS MORE RAIN MOVES BACK INTO THE
BASIN, THE RIVER SHOULD RISE AGAIN AND SHOULD EXCEED FLOOD STAGE OF 
10.5 FEET.

EXCESSIVE RUNOFF FROM HEAVY RAINFALL WILL CAUSE FLOODING OF SMALL
CREEKS AND STREAMS...URBAN AREAS...HIGHWAYS...STREETS AND UNDERPASSES
AS WELL AS OTHER DRAINAGE AREAS AND LOW LYING SPOTS.

FLOODING IS OCCURRING OR IS IMMINENT.  MOST FLOOD RELATED DEATHS 
OCCUR IN AUTOMOBILES.  DO NOT ATTEMPT TO CROSS WATER COVERED 
BRIDGES, DIPS OR LOW WATER CROSSINGS.  NEVER TRY TO CROSS A FLOWING 
STREAM, EVEN A SMALL ONE, ON FOOT.  TO ESCAPE RISING WATER MOVE UP 
TO HIGHER GROUND.

LAT...LON 3976 7575 3939 7578 3936 7552 3959 7557
      3979 7548 3984 7562

$$

RNS
1 follow-up statement
000 
WGUS71 KPHI 081343
FFSPHI

FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE MOUNT HOLLY NJ
941 AM EDT SAT OCT 8 2005

DEC003-081351-
NEW CASTLE DE-
941 AM EDT SAT OCT 8 2005

...THE FLASH FLOOD WARNING FOR NEW CASTLE COUNTY IS CANCELLED...

RAIN WILL CONTINUE ACROSS NEW CASTLE COUNTY TODAY. HOWEVER, THE 
VERY HEAVY RAIN HAS MOVED OFF TO THE NORTH. THEREFORE, THE FLASH
FLOOD WARNING HAS BEEN CANCELED.

HOWEVER, THE FLOOD WATCH REMAINS IN EFFECT INTO TONIGHT AS 
ADDITIONAL HEAVY RAIN CAN BE EXPECTED. IF EXCESSIVE HEAVY RAIN 
REDEVELOPS, A FLOOD OR FLASH FLOOD WARNING COULD BE REISSUED.

LAT...LON 3976 7575 3939 7578 3936 7552 3959 7557
      3979 7548 3984 7562

$$

RNS

Nearby

Flash Flood Warnings in Delaware, 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.