Alert archive / Maryland / Flash Flood Warnings in 2000

Flash Flood Warning 51, NWS Philadelphia/Mount Holly

December 17, 2000Cecil County, Kent County, Maryland; New Castle County, Delaware; Chester County, Pennsylvania

NWS Philadelphia/Mount Holly issued this flash flood warning at Dec 17, 2000, 7:03 AM EST for Cecil County, Kent County, Maryland; New Castle County, Delaware; Chester 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 counties it named.

The facts

Issued
Dec 17, 2000, 7:03 AM EST (12:03 UTC)
Expired
Dec 17, 2000, 10:00 AM EST
In force
3 hr
Issued by
NWS Philadelphia/Mount Holly
Area
Whole counties

Counties New Castle County, DE, Cecil County, MD, Kent County, MD, Chester County, PA

The nearest sounding before it

Washington/Dulle, VA (KIAD), launched 12:00Z, 0.1 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, Washington/Dulle, VA at 12:00Z on 2000-12-17Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 0 joules per kilogram.LCL10008507005003002001001 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, Washington/Dulle, VA at 12:00Z on 2000-12-17The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 89 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
0 J/kg
Mixed-layer CIN
No buoyant parcel
Mixed-layer LCL
483 m above ground
0-6 km bulk shear
64 kt
0-1 km storm-relative helicity
89 m²/s²
0-3 km storm-relative helicity
116 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 171205
FFWPHI
DEC003-MDC015-029-PAC029-171500-

BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE MOUNT HOLLY NJ
703 AM EST SUN DEC 17 2000

THE NATIONAL WEATHER SERVICE IN MOUNT HOLLY NJ HAS ISSUED A

* FLASH FLOOD WARNING FOR...
  CECIL COUNTY IN NORTHEAST MARYLAND
  EXTREME NORTHERN KENT COUNTY IN NORTHEAST MARYLAND

* UNTIL 1000 AM EST.

* AT 701 AM EST...WEATHER SERVICE RADAR INDICATED BETWEEN TWO AND
  THREE INCHES OF RAIN HAS FALLEN OVER PARTS OF CECIL AND KENT
  COUNTIES IN MARYLAND. SOME ADDITIONAL RAIN IS LIKELY BEFORE ENDING
  LATER THIS MORNING.

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

$$
JJM

LAT...LON 3974 7570 3936 7570 3936 7619 3974 7620

The office that day

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

IssuedProductOfficeCountiesLasted
Dec 17, 10:00 AM ESTFlash Flood WarningPHICecil, Kent3 hr
Dec 17, 9:25 AM ESTSevere Thunderstorm WarningPHINew Castle35 min
Dec 17, 6:06 AM ESTFlash Flood WarningPHIChester114 min
Dec 17, 6:13 AM ESTSevere Thunderstorm WarningPHIChester32 min
Dec 17, 6:50 AM ESTFlash Flood WarningPHIBucks, Montgomery3 hr
Dec 17, 7:29 AM ESTFlash Flood WarningPHIDelaware3 hr
Dec 17, 9:33 AM ESTFlash Flood WarningPHIChester117 min
Dec 17, 9:52 AM ESTFlash Flood WarningPHICarbon, Monroe3 hr
Dec 17, 10:00 AM ESTFlash Flood WarningPHIDelaware3 hr

Nearby

Flash Flood Warnings in Maryland, 2000Flash Flood Warnings in Delaware, 2000Flash Flood Warnings in Pennsylvania, 2000Every flash flood warning in 2000

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.