Alert archive / Maryland / Flash Flood Warnings in 2009
Flash Flood Warning 60, NWS Philadelphia/Mount Holly
NWS Philadelphia/Mount Holly issued this flash flood warning at Aug 28, 2009, 2:53 PM EDT for 4 counties in Maryland. It was in force for 6 hr. 1 report came from inside the area while it was in force.
The area
The outline as issued, with what was reported inside it.
The facts
- Issued
- Aug 28, 2009, 2:53 PM EDT (18:53 UTC)
- Expired
- Aug 28, 2009, 9:15 PM EDT
- In force
- 6 hr
- Issued by
- NWS Philadelphia/Mount Holly
- Area
- Storm-based polygon
- Flood severity
- None
Counties Caroline County, MD, Kent County, MD, Queen Anne's County, MD, Talbot County, MD
The radar
The Dover AFB radar (KDOX), 64 km from the middle of the area, began a volume at 18:54 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.
What was reported inside it
| Time | Report | Where | Remark |
|---|---|---|---|
| Aug 28, 3:14 PM EDT | FLASH FLOOD | Ridgely, MD | ROAD CLOSED BETWEEN RIDGELY AND DENTON. |
Local storm reports filed while the alert was in force, from inside its polygon or its counties.
The nearest sounding before it
Washington/Dulle, VA (KIAD), launched 12:00Z, 6.9 hours before the alert went out and 110 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
- 787 J/kg
- Mixed-layer CIN
- -74 J/kg
- Mixed-layer LCL
- 613 m above ground
- 0-6 km bulk shear
- 19 kt
- 0-1 km storm-relative helicity
- 69 m²/s²
- 0-3 km storm-relative helicity
- 88 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 1.7
The text
As transmitted, in the capitals the NWS used until 2016.
000
WGUS51 KPHI 281853
FFWPHI
MDC011-029-035-041-282245-
/O.NEW.KPHI.FF.W.0060.090828T1853Z-090828T2245Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE MOUNT HOLLY NJ
253 PM EDT FRI AUG 28 2009
THE NATIONAL WEATHER SERVICE IN MOUNT HOLLY NJ HAS ISSUED A
* FLASH FLOOD WARNING FOR...
NORTHERN CAROLINE COUNTY IN EASTERN MARYLAND...
NORTH CENTRAL TALBOT COUNTY IN EASTERN MARYLAND...
EASTERN KENT COUNTY IN NORTHEAST MARYLAND...
QUEEN ANNES COUNTY IN NORTHEAST MARYLAND...
THIS INCLUDES THE CITY OF CENTERVILLE...
* UNTIL 645 PM EDT
* AT 244 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED
HEAVY RAIN ACROSS THE EASTERN SHORE. AN ADDITIONAL ONE TO TWO
INCHES OF RAIN IS LIKELY OVER THE NEXT COUPLE HOURS ACROSS
PORTIONS OF THE WARNED AREA. THIS IS IN ADDITION TO THE ONE TO
TWO INCHES THAT ALREADY FELL IN SPOTS.
* LOCATIONS IN THE WARNING INCLUDE BUT ARE NOT LIMITED TO
GRASONVILLE...STARKEY CORNER...STARR...SASSAFRAS...OVERTON...OLD
TOWN...MORGNEC...MASSEY...KENNEDYVILLE...JUMPTOWN...HOPE...
CRUMPTON...CARVILLE...OAKLAND...SUDLERSVILLE...MILLINGTON...
GREENSBORO...GOLDSBORO...CHURCH HILL...CHESTERTOWN AND CENTREVILLE
PRECAUTIONARY/PREPAREDNESS ACTIONS...
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.
A FLASH FLOOD WARNING MEANS THAT FLOODING IS IMMINENT OR OCCURRING.
&&
LAT...LON 3899 7627 3898 7620 3900 7618 3903 7624
3907 7622 3937 7594 3938 7577 3899 7574
3885 7621 3893 7621 3894 7624 3890 7624
$$
KRUZDLO1 follow-up statement
000
WGUS51 KPHI 282239
FFWPHI
MDC011-029-035-041-290115-
/O.EXT.KPHI.FF.W.0060.000000T0000Z-090829T0115Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE MOUNT HOLLY NJ
639 PM EDT FRI AUG 28 2009
THE NATIONAL WEATHER SERVICE IN MOUNT HOLLY NJ HAS EXTENDED THE
* FLASH FLOOD WARNING FOR...
NORTHERN CAROLINE COUNTY IN EASTERN MARYLAND...
NORTH CENTRAL TALBOT COUNTY IN EASTERN MARYLAND...
EASTERN KENT COUNTY IN NORTHEAST MARYLAND...
QUEEN ANNES COUNTY IN NORTHEAST MARYLAND...
THIS INCLUDES THE CITY OF CENTERVILLE...
* UNTIL 915 PM EDT
* AT 636 PM EDT...MORE HEAVY RAIN WAS MOVING NORTH INTO THE WARNED
AREA. ANOTHER ONE TO TWO INCHES IS LIKELY IN SPOTS. THE FLASH
FLOOD WARNING HAS BEEN EXTENDED.
* LOCATIONS IN THE WARNING INCLUDE BUT ARE NOT LIMITED TO STARKEY
CORNER...SASSAFRAS...OLD TOWN...MORGNEC...MASSEY...KENNEDYVILLE...
HOPE...CRUMPTON...CARVILLE...SUDLERSVILLE...MILLINGTON...CHURCH
HILL...CHESTERTOWN AND CENTREVILLE
PRECAUTIONARY/PREPAREDNESS ACTIONS...
DO NOT DRIVE YOUR VEHICLE INTO AREAS WHERE THE WATER COVERS THE
ROADWAY. THE WATER DEPTH MAY BE TOO GREAT TO ALLOW YOUR CAR TO CROSS
SAFELY.
A FLASH FLOOD WARNING MEANS THAT FLOODING IS IMMINENT OR OCCURRING.
&&
LAT...LON 3899 7627 3898 7620 3900 7618 3903 7624
3907 7622 3937 7594 3938 7577 3899 7574
3885 7621 3893 7621 3894 7624 3890 7624
$$
KRUZDLOThe office that day
Everything else NWS Philadelphia/Mount Holly issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Aug 28, 1:40 AM EDT | Flash Flood Warning | PHI | Cecil | 5 hr |
| Aug 28, 2:13 PM EDT | Flash Flood Warning | PHI | Cecil | 2 hr |
| Aug 28, 2:52 PM EDT | Flash Flood Watch | PHI | Cecil | 14 hr |
| Aug 28, 3:21 PM EDT | Flash Flood Warning | PHI | Caroline, Talbot | 6 hr |
| Aug 28, 6:49 PM EDT | Areal Flood Advisory | PHI | Caroline, Talbot | 5 hr |
Nearby
Flash Flood Warnings in Maryland, 2009Every flash flood warning in 2009
Sources
The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.