Alert archive / Maryland / Flash Flood Warnings in 2004
Flash Flood Warning 100, NWS Philadelphia/Mount Holly
NWS Philadelphia/Mount Holly issued this flash flood warning at Sep 28, 2004, 5:30 PM EDT for 5 counties in Maryland; Kent County, New Castle County, Sussex 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
- Sep 28, 2004, 5:30 PM EDT (21:30 UTC)
- Expired
- Sep 28, 2004, 8:30 PM EDT
- In force
- 3 hr
- Issued by
- NWS Philadelphia/Mount Holly
- Area
- Counties, with a storm outline in the text
Counties Kent County, DE, New Castle County, DE, Sussex County, DE, Caroline County, MD, Cecil County, MD, Kent County, MD, Queen Anne's County, MD, Talbot County, MD
The nearest sounding before it
Phillips Aaf/Abe, MD (KAPG), launched 12:00Z, 9.5 hours before the alert went out and 36 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.
- Mixed-layer CAPE
- 95 J/kg
- Mixed-layer CIN
- -78 J/kg
- Mixed-layer LCL
- 631 m above ground
- 0-6 km bulk shear
- 41 kt
- 0-1 km storm-relative helicity
- 109 m²/s²
- 0-3 km storm-relative helicity
- 172 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.4
The text
As transmitted, in the capitals the NWS used until 2016.
000
WGUS51 KPHI 282132
FFWPHI
DEC001-003-005-MDC011-015-029-035-041-290030-
/X.NEW.KPHI.FF.W.0019.040928T2130Z-040929T0030Z/
/0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE MOUNT HOLLY NJ
530 PM EDT TUE SEP 28 2004
THE NATIONAL WEATHER SERVICE IN MOUNT HOLLY NJ HAS ISSUED A
* FLASH FLOOD WARNING FOR...
KENT COUNTY IN CENTRAL DELAWARE
CAROLINE COUNTY IN EASTERN MARYLAND
TALBOT COUNTY IN EASTERN MARYLAND
CECIL COUNTY IN NORTHEAST MARYLAND
KENT COUNTY IN NORTHEAST MARYLAND
QUEEN ANNES COUNTY IN NORTHEAST MARYLAND
NEW CASTLE COUNTY IN NORTHERN DELAWARE
SUSSEX COUNTY IN SOUTHERN DELAWARE
* UNTIL 830 PM EDT
* AT 526 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED
HEAVY RAIN CONTINUING OVER THE AREA WITH MORE RAIN ON THE WAY.
FLOODING OF POOR DRAINAGE AREAS AND SMALL STREAMS IS EXPECTED
TO CONTINUE OVER THE AREA INTO THE EVENING HOURS.
EXCESSIVE RUNOFF FROM HEAVY RAINFALL WILL CAUSE FLOODING OF SMALL
CREEKS AND STREAMS...HIGHWAYS AND UNDERPASSES. ADDITIONALLY...COUNTRY
ROADS AND FARMLANDS ALONG THE BANKS OF CREEKS...STREAMS AND OTHER LOW
LYING AREAS ARE SUBJECT TO FLOODING.
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. TURN AROUND, DONT DROWN.
LAT...LON 3872 7590 3885 7611 3935 7613 3937 7601
3941 7604 3956 7598 3957 7599 3954 7600
3958 7611 3970 7615 3972 7579 3976 7573
3978 7556 3955 7564 3907 7540 3865 7514
3860 7515 3856 7509
$$
JJMThe office that day
Everything else NWS Philadelphia/Mount Holly issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Sep 28, 2:12 PM EDT | Severe Thunderstorm Warning | PHI | Cecil, Kent | 63 min |
| Sep 28, 2:36 PM EDT | Flash Flood Warning | PHI | Cecil, Kent, Queen Anne's | 3 hr |
| Sep 28, 6:38 PM EDT | Severe Thunderstorm Warning | PHI | Kent | 67 min |
| Sep 28, 3:14 PM EDT | Severe Thunderstorm Warning | PHI | New Castle | 46 min |
| Sep 28, 4:01 PM EDT | Severe Thunderstorm Warning | PHI | New Castle | 44 min |
| Sep 28, 4:11 PM EDT | Tornado Warning | PHI | New Castle | 34 min |
| Sep 28, 4:41 PM EDT | Severe Thunderstorm Warning | PHI | New Castle | 79 min |
Nearby
Flash Flood Warnings in Maryland, 2004Flash Flood Warnings in Delaware, 2004Every flash flood warning in 2004
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.