Alert archive / Maryland / Flash Flood Warnings in 1999
Flash Flood Warning 38, NWS Philadelphia/Mount Holly
NWS Philadelphia/Mount Holly issued this flash flood warning at Sep 16, 1999, 9:25 AM EDT for Caroline County, Talbot County, Maryland. It was in force for 6 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, 9:25 AM EDT (13:25 UTC)
- Expired
- Sep 16, 1999, 3:30 PM EDT
- In force
- 6 hr
- Issued by
- NWS Philadelphia/Mount Holly
- Area
- Whole counties
Counties Caroline County, MD, Talbot County, MD
The radar
The Dover AFB radar (KDOX), 49 km from the middle of the area, began a volume at 13:25 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, 1.4 hours before the alert went out and 111 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
- 1326 J/kg
- Mixed-layer CIN
- 0 J/kg
- Mixed-layer LCL
- 617 m above ground
- 0-6 km bulk shear
- 33 kt
- 0-1 km storm-relative helicity
- 262 m²/s²
- 0-3 km storm-relative helicity
- 316 m²/s²
- Significant tornado parameter
- 1.9
- Supercell composite
- 10.9
The text
As transmitted, in the capitals the NWS used until 2016.
000 TTAA00 KPHL 161325 FFWPHL DEC001-005-MDC011-015-029-035-041-NJC007-015-033-PAC017-091-161930- BULLETIN - EAS ACTIVATION REQUESTED FLASH FLOOD WARNING NATIONAL WEATHER SERVICE MOUNT HOLLY NJ 925 AM EDT THU SEP 16 1999 THE NATIONAL WEATHER SERVICE IN MOUNT HOLLY NJ HAS ISSUED A * FLASH FLOOD WARNING FOR... MONTGOMERY COUNTY IN PENNSYLVANIA. BUCKS COUNTY IN PENNSYLVANIA. SALEM COUNTY IN NEW JERSEY. GLOUCESTER COUNTY IN NEW JERSEY. CAMDEN COUNTY IN NEW JERSEY. 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 330 PM EDT. * HEAVY RAINS ASSOCIATED WITH THE APPROACH OF HURRICANE FLOYD HAVE MOVED INTO THE AREA. RAINFALL RATES HAVE INCREASED... WITH MANY LOCATIONS REPORTING OVER ONE INCH OF RAIN PER HOUR. FEDERALSBURG MD IN CAROLINE COUNTY REPORTED 1.1 INCHES IN 15 MINUTES AND HAS RECEIVED 7.5 INCHES OF RAIN SO FAR. * HEAVY RAINS WILL CONTINUE UNTIL HURRICANE FLOYD PASSES THE AREA TONIGHT. 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 GSS
The office that day
Everything else NWS Philadelphia/Mount Holly issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Sep 16, 9:25 AM EDT | Flash Flood Warning | PHI | Cecil, Kent, Queen Anne's | 6 hr |
| Sep 16, 3:12 PM EDT | Flash Flood Warning | PHI | Caroline, Queen Anne's, Talbot | 3 hr |
| Sep 16, 3:12 PM EDT | Flash Flood Warning | PHI | Cecil, Kent | 3 hr |
| Sep 16, 6:13 PM EDT | Flash Flood Warning | PHI | Cecil, Kent, Queen Anne's | 3 hr |
| Sep 16, 6:13 PM EDT | Flash Flood Warning | PHI | Caroline, Talbot | 3 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; radar from the NEXRAD Level II archive.