Alert archive / Maryland / Flash Flood Warnings in 2017
Flash Flood Warning 44, NWS Philadelphia/Mount Holly
NWS Philadelphia/Mount Holly issued this flash flood warning at Aug 7, 2017, 10:44 AM EDT for Caroline County, Queen Anne's County, Talbot County, Maryland; Kent County, Delaware. It was in force for 4 hr. 9 reports 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 7, 2017, 10:44 AM EDT (14:44 UTC)
- Expired
- Aug 7, 2017, 2:45 PM EDT
- In force
- 4 hr
- Issued by
- NWS Philadelphia/Mount Holly
- Area
- Storm-based polygon
- Flood severity
- None
Counties Kent County, DE, Caroline County, MD, Queen Anne's County, MD, Talbot County, MD
The radar
The Dover AFB radar (KDOX), 57 km from the middle of the area, began a volume at 14:43 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 7, 12:00 PM EDT | FLOOD | Grasonville, MD | REPORTS OF FLOODING IN THE PROSPECT BAY AREA. WATER ENTERING GARAGES AS MUCH AS 6 INCHES DEEP. TIME ESTIMATED. |
| Aug 7, 12:11 PM EDT | HEAVY RAIN 3.39 | Belle Point Farm, MD | |
| Aug 7, 12:18 PM EDT | HEAVY RAIN 2.49 | Garrison Lake Green, DE | |
| Aug 7, 12:30 PM EDT | FLOOD | Edge Hill, DE | WATER REPORTED OVER THE ROAD ON HIGHWAY 13 JUST NORTH OF WHITE OAK ROAD. TIME ESTIMATED. |
| Aug 7, 12:54 PM EDT | HEAVY RAIN 2.04 | Voshell Cove, DE | |
| Aug 7, 1:01 PM EDT | HEAVY RAIN 4.13 | Belle Point Farm, MD | |
| Aug 7, 2:00 PM EDT | FLOOD | Dover, DE | MINOR STREET FLOODING REPORTED IN DOWNTOWN DOVER. TIME ESTIMATED. |
| Aug 7, 2:04 PM EDT | FLOOD | Edge Hill, DE | RIGHT LANE CLOSED ON HIGHWAY 13 JUST NORTH OF WHITE OAK ROAD. |
| Aug 7, 2:32 PM EDT | HEAVY RAIN 3.71 | Laurel Bend, DE |
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, 2.7 hours before the alert went out and 115 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
- 220 J/kg
- Mixed-layer CIN
- -74 J/kg
- Mixed-layer LCL
- 780 m above ground
- 0-6 km bulk shear
- 21 kt
- 0-1 km storm-relative helicity
- 72 m²/s²
- 0-3 km storm-relative helicity
- 128 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted.
015
WGUS51 KPHI 071444
FFWPHI
DEC001-MDC011-035-041-071845-
/O.NEW.KPHI.FF.W.0044.170807T1444Z-170807T1845Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
BULLETIN - EAS ACTIVATION REQUESTED
Flash Flood Warning
National Weather Service Mount Holly NJ
1044 AM EDT MON AUG 7 2017
The National Weather Service in Mount Holly NJ has issued a
* Flash Flood Warning for...
Northern Kent County in central Delaware...
Northeastern Talbot County in eastern Maryland...
Central Queen Anne's County in northeastern Maryland...
Northern Caroline County in eastern Maryland...
* Until 245 PM EDT
* At 1042 AM EDT...Doppler radar indicated thunderstorms producing
heavy rain across the warned area. Up to three inches of rain have
already fallen. Flash flooding is expected to begin shortly in the
areas of heaviest rain.
* Some locations that could experience flooding include...
Dover, Centerville, Smyrna, Centreville, Camden, Greensboro,
Oakland, Ridgely, Cheswold, Goldsboro, Queen Anne, Hartly,
Grasonville, Starr, Woodland Beach, Copperville, Jumptown,
Hazlettville, Dover Base Housing and Dover Speedway.
Additional rainfall amounts of two to three inches are possible in
the warned area.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Excessive runoff from heavy rainfall will cause flooding of small
creeks and streams, country roads, farmland, and other low lying
spots.
&&
LAT...LON 3895 7624 3896 7624 3936 7546 3927 7537
3917 7537 3877 7621 3881 7623 3880 7621
3883 7619 3889 7620 3891 7625 3891 7621
3893 7620 3892 7626 3894 7627
$$
SFJ2 follow-up statements
027
WGUS71 KPHI 071713
FFSPHI
Flash Flood Statement
National Weather Service Mount Holly NJ
113 PM EDT MON AUG 7 2017
DEC001-MDC011-035-041-071845-
/O.CON.KPHI.FF.W.0044.000000T0000Z-170807T1845Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Kent DE-Talbot MD-Queen Anne's MD-Caroline MD-
113 PM EDT MON AUG 7 2017
...THE FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 245 PM EDT FOR
NORTHERN KENT...NORTHEASTERN TALBOT...CENTRAL QUEEN ANNE'S AND
NORTHERN CAROLINE COUNTIES...
At 112 PM EDT...Doppler radar indicated thunderstorms producing
heavy rain across the warned area. Up to five inches of rain have
fallen. Flash flooding is expected to begin shortly. Flooding of
several garages has been reported in Grasonville.
Some locations that could experience flooding include...
Dover, Centerville, Smyrna, Centreville, Camden, Greensboro, Oakland,
Ridgely, Cheswold, Goldsboro, Queen Anne, Hartly, Grasonville, Starr,
Woodland Beach, Copperville, Jumptown, Hazlettville, Dover Base
Housing and Dover Speedway.
Additional rainfall amounts of One to three inches are possible in
the warned area.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Move to higher ground now. Act quickly to protect your life. Turn
around don't drown.
&&
LAT...LON 3895 7624 3896 7624 3936 7546 3927 7537
3917 7537 3877 7621 3881 7623 3880 7621
3883 7619 3889 7620 3891 7625 3891 7621
3893 7620 3892 7626 3894 7627
$$
MWG090
WGUS71 KPHI 071845
FFSPHI
Flash Flood Statement
National Weather Service Mount Holly NJ
245 PM EDT MON AUG 7 2017
DEC001-MDC011-035-041-071854-
/O.EXP.KPHI.FF.W.0044.000000T0000Z-170807T1845Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Kent DE-Talbot MD-Queen Anne's MD-Caroline MD-
245 PM EDT MON AUG 7 2017
...THE FLASH FLOOD WARNING FOR NORTHERN KENT...NORTHEASTERN TALBOT...
CENTRAL QUEEN ANNE'S AND NORTHERN CAROLINE COUNTIES WILL EXPIRE AT
245 PM EDT...
The heavy rain has ended. Flash Flooding is no longer expected to
pose a threat. Please continue to heed any remaining road closures.
An areal flood warning is in effect into the evening.
LAT...LON 3895 7624 3896 7624 3936 7546 3927 7537
3917 7537 3877 7621 3881 7623 3880 7621
3883 7619 3889 7620 3891 7625 3891 7621
3893 7620 3892 7626 3894 7627
$$
MWGThe office that day
Everything else NWS Philadelphia/Mount Holly issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Aug 7, 8:54 AM EDT | Areal Flood Advisory | PHI | Cecil, Kent, Queen Anne's | 3 hr |
| Aug 7, 11:41 AM EDT | Areal Flood Advisory | PHI | Caroline, Talbot | 3 hr |
| Aug 7, 1:35 PM EDT | Flash Flood Warning | PHI | Caroline, Queen Anne's, Talbot | 4 hr |
| Aug 7, 2:40 PM EDT | Areal Flood Warning | PHI | Caroline, Queen Anne's, Talbot | 6 hr |
| Aug 7, 4:32 PM EDT | Special Weather Statement | PHI | Talbot | 58 min |
| Aug 7, 5:25 PM EDT | Areal Flood Warning | PHI | Caroline, Queen Anne's, Talbot | 4 hr |
| Aug 7, 9:59 AM EDT | Areal Flood Advisory | PHI | Kent, New Castle | 3 hr |
| Aug 7, 12:36 PM EDT | Areal Flood Advisory | PHI | Kent | 4 hr |
| Aug 7, 1:47 PM EDT | Special Weather Statement | PHI | Sussex | 43 min |
| Aug 7, 1:58 PM EDT | Severe Thunderstorm Warning | PHI | Sussex | 47 min |
| Aug 7, 2:06 PM EDT | Flash Flood Warning | PHI | Kent, Sussex | 4 hr |
| Aug 7, 2:08 PM EDT | Tornado Warning | PHI | Sussex | 37 min |
| Aug 7, 2:22 PM EDT | Areal Flood Advisory | PHI | Sussex | 4 hr |
| Aug 7, 2:41 PM EDT | Severe Thunderstorm Warning | PHI | Sussex | 34 min |
| Aug 7, 4:57 PM EDT | Areal Flood Warning | PHI | Sussex | 4 hr |
Nearby
Flash Flood Warnings in Maryland, 2017Flash Flood Warnings in Delaware, 2017Every flash flood warning in 2017
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.