Alert archive / Maryland / Flash Flood Warnings in 2009
Flash Flood Warning 61, NWS Philadelphia/Mount Holly
NWS Philadelphia/Mount Holly issued this flash flood warning at Aug 28, 2009, 3:21 PM EDT for Caroline County, Talbot County, Maryland; Kent County, Delaware. 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 outline as issued.
The facts
- Issued
- Aug 28, 2009, 3:21 PM EDT (19:21 UTC)
- Expired
- Aug 28, 2009, 9:45 PM EDT
- In force
- 6 hr
- Issued by
- NWS Philadelphia/Mount Holly
- Area
- Storm-based polygon
- Flood severity
- None
Counties Kent County, DE, Caroline County, MD, Talbot County, MD
The radar
The Dover AFB radar (KDOX), 40 km from the middle of the area, began a volume at 19:23 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, 7.4 hours before the alert went out and 118 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
- 2064 J/kg
- Mixed-layer CIN
- -19 J/kg
- Mixed-layer LCL
- 762 m above ground
- 0-6 km bulk shear
- 15 kt
- 0-1 km storm-relative helicity
- 21 m²/s²
- 0-3 km storm-relative helicity
- 38 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 1.0
The text
As transmitted, in the capitals the NWS used until 2016.
000
WGUS51 KPHI 281921
FFWPHI
DEC001-MDC011-041-282145-
/O.NEW.KPHI.FF.W.0061.090828T1921Z-090828T2145Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE MOUNT HOLLY NJ
321 PM EDT FRI AUG 28 2009
THE NATIONAL WEATHER SERVICE IN MOUNT HOLLY NJ HAS ISSUED A
* FLASH FLOOD WARNING FOR...
SOUTHWESTERN KENT COUNTY IN CENTRAL DELAWARE...
CENTRAL CAROLINE COUNTY IN EASTERN MARYLAND...
NORTHEASTERN TALBOT COUNTY IN EASTERN MARYLAND...
THIS INCLUDES THE CITY OF EASTON...
* UNTIL 545 PM EDT
* AT 318 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED
FLASH FLOODING FROM A THUNDERSTORM OVER THE WARNED AREA.
* LOCATIONS IN THE WARNING INCLUDE BUT ARE NOT LIMITED TO SKIPTON...
CORDOVA...SANDTOWN...RIDGELY...GREENSBORO AND DENTON
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 3872 7605 3888 7612 3893 7599 3892 7595
3894 7596 3900 7575 3904 7576 3913 7565
3888 7564
$$
KRUZDLO2 follow-up statements
000
WGUS51 KPHI 282142
FFWPHI
DEC001-MDC011-041-290015-
/O.EXT.KPHI.FF.W.0061.000000T0000Z-090829T0015Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE MOUNT HOLLY NJ
542 PM EDT FRI AUG 28 2009
THE NATIONAL WEATHER SERVICE IN MOUNT HOLLY NJ HAS EXTENDED THE
* FLASH FLOOD WARNING FOR...
SOUTHWESTERN KENT COUNTY IN CENTRAL DELAWARE...
CENTRAL CAROLINE COUNTY IN EASTERN MARYLAND...
NORTHEASTERN TALBOT COUNTY IN EASTERN MARYLAND...
* UNTIL 815 PM EDT
* AT 530 PM EDT...MORE HEAVY RAIN WAS MOVING NORTH NORTHEAST THROUGH
DORCHESTER COUNTY. THE RAIN WILL MAKE IT INTO THE WARNED AREA
SHORTLY AFTER 600 PM. ANOTHER ONE TO TWO INCHES IS LIKELY IN
SPOTS. THE FLASH FLOOD WARNING HAS BEEN EXTENDED.
* LOCATIONS IN THE WARNING INCLUDE BUT ARE NOT LIMITED TO SANDTOWN...
RIDGELY AND GREENSBORO
PRECAUTIONARY/PREPAREDNESS ACTIONS...
DO NOT DRIVE YOUR VEHICLE INTO AREAS WHERE THE WATER COVERS THE
ROADWAY. THE WATER DEPTH MAY BE TOO GREAT TO ALLOW YOUR CAR TO CROSS
SAFELY.
A FLASH FLOOD WARNING MEANS THAT FLOODING IS IMMINENT OR OCCURRING.
&&
LAT...LON 3872 7605 3888 7612 3893 7599 3892 7595
3894 7596 3900 7575 3904 7576 3913 7565
3888 7564
$$
KRUZDLO000
WGUS51 KPHI 290008
FFWPHI
DEC001-MDC011-041-290145-
/O.EXT.KPHI.FF.W.0061.000000T0000Z-090829T0145Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE MOUNT HOLLY NJ
808 PM EDT FRI AUG 28 2009
THE NATIONAL WEATHER SERVICE IN MOUNT HOLLY NJ HAS EXTENDED THE
* FLASH FLOOD WARNING FOR...
SOUTHWESTERN KENT COUNTY IN CENTRAL DELAWARE...
CENTRAL CAROLINE COUNTY IN EASTERN MARYLAND...
NORTHEASTERN TALBOT COUNTY IN EASTERN MARYLAND...
* UNTIL 945 PM EDT
* AT 805 PM EDT...MORE MODERATE TO HEAVY RAIN WAS APPROACHING THE
WARNED AREA. THE FLASH FLOOD WARNING HAS BEEN EXTENDED.
* LOCATIONS IN THE WARNING INCLUDE BUT ARE NOT LIMITED TO SANDTOWN...
RIDGELY AND GREENSBORO
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 3872 7605 3888 7612 3893 7599 3892 7595
3894 7596 3900 7575 3904 7576 3913 7565
3888 7564
$$
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, 2:53 PM EDT | Flash Flood Warning | PHI | Caroline, Kent, Queen Anne's, Talbot | 6 hr |
| Aug 28, 6:49 PM EDT | Areal Flood Advisory | PHI | Caroline, Talbot | 5 hr |
| Aug 28, 3:13 PM EDT | Areal Flood Advisory | PHI | Kent, New Castle | 4 hr |
Nearby
Flash Flood Warnings in Maryland, 2009Flash Flood Warnings in Delaware, 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; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.