Alert archive / Maryland / Flash Flood Warnings in 1999

Flash Flood Warning 53, NWS Philadelphia/Mount Holly

September 16, 1999Cecil County, Kent County, Maryland

NWS Philadelphia/Mount Holly issued this flash flood warning at Sep 16, 1999, 3:12 PM EDT for Cecil County, Kent County, Maryland. 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
Sep 16, 1999, 3:12 PM EDT (19:12 UTC)
Expired
Sep 16, 1999, 6:10 PM EDT
In force
3 hr
Issued by
NWS Philadelphia/Mount Holly
Area
Whole counties

Counties Cecil County, MD, Kent County, MD

The nearest sounding before it

Washington/Dulle, VA (KIAD), launched 12:00Z, 7.2 hours before the alert went out and 129 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 1999-09-16Temperature 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 1999-09-16The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 131 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
0 J/kg
Mixed-layer CIN
No buoyant parcel
Mixed-layer LCL
577 m above ground
0-6 km bulk shear
50 kt
0-1 km storm-relative helicity
131 m²/s²
0-3 km storm-relative helicity
268 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 
TTAA00 KPHL 161911
FFWPHL
DEC001-005-MDC011-015-029-035-041-162210-

BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE MOUNT HOLLY NJ
312 PM EDT THU SEP 16 1999

THE NATIONAL WEATHER SERVICE IN MOUNT HOLLY NJ HAS EXTENDED THE

* FLASH FLOOD WARNING FOR...
  KENT COUNTY IN DELAWARE.
  SUSSEX COUNTY IN DELAWARE.
  CECIL COUNTY IN MARYLAND.
  KENT COUNTY IN MARYLAND.
  QUEEN ANNES COUNTY IN MARYLAND.
  TALBOT COUNTY IN MARYLAND.
  CAROLINE COUNTY IN MARYLAND.

* UNTIL 610 PM EDT.

* NATIONAL WEATHER SERVICE RADAR IS SHOWING THAT RAINFALL
ASSOCIATED WITH FLOYD IS MOVING OFF TO THE NORTH. WHILE THE
HEAVY RAIN WILL BE ENDING FROM SOUTH TO NORTH DURING THE LATE
AFTERNOON AND EARLY EVENING HOURS...FLOODING IN AREAS OF POOR
DRAINAGE AND ON STREAMS AND CREEKS WILL CONTINUE.

  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.

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

  .END
  RPW

The office that day

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

IssuedProductOfficeCountiesLasted
Sep 16, 9:25 AM EDTFlash Flood WarningPHICecil, Kent, Queen Anne's6 hr
Sep 16, 9:25 AM EDTFlash Flood WarningPHICaroline, Talbot6 hr
Sep 16, 3:12 PM EDTFlash Flood WarningPHICaroline, Queen Anne's, Talbot3 hr
Sep 16, 6:13 PM EDTFlash Flood WarningPHICecil, Kent, Queen Anne's3 hr
Sep 16, 6:13 PM EDTFlash Flood WarningPHICaroline, Talbot3 hr

Nearby

Flash Flood Warnings in Maryland, 1999Every flash flood warning in 1999

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.