Alert archive / Maryland / Flash Flood Warnings in 2017
Flash Flood Warning 46, NWS Philadelphia/Mount Holly
NWS Philadelphia/Mount Holly issued this flash flood warning at Aug 7, 2017, 1:35 PM EDT for Caroline County, Queen Anne's County, Talbot County, Maryland. It was in force for 4 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 7, 2017, 1:35 PM EDT (17:35 UTC)
- Expired
- Aug 7, 2017, 5:30 PM EDT
- In force
- 4 hr
- Issued by
- NWS Philadelphia/Mount Holly
- Area
- Storm-based polygon
- Flood severity
- None
Counties Caroline 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 17:36 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
Washington/Dulle, VA (KIAD), launched 12:00Z, 5.6 hours before the alert went out and 108 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.
079
WGUS51 KPHI 071735
FFWPHI
MDC011-035-041-072130-
/O.NEW.KPHI.FF.W.0046.170807T1735Z-170807T2130Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
BULLETIN - EAS ACTIVATION REQUESTED
Flash Flood Warning
National Weather Service Mount Holly NJ
135 PM EDT MON AUG 7 2017
The National Weather Service in Mount Holly NJ has issued a
* Flash Flood Warning for...
Talbot County in eastern Maryland...
South central Queen Anne's County in northeastern Maryland...
Caroline County in eastern Maryland...
* Until 530 PM EDT
* At 133 PM 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. Additional rainfall of a couple of inches
is likely over the next few hours.
* Some locations that could experience flooding include...
Easton, Talbot, Denton, Federalsburg, Greensboro, Ridgely, Trappe,
St. Michaels, Preston, Oxford, Queen Anne, Smithville, Copperville,
Agner, Choptank, Windyhill, Tanyard, Harmony, Tilghman Island and
Skipton.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Please report flooding to your local law enforcement agency when you
can do so safely. Turn around don't drown.
&&
LAT...LON 3876 7633 3886 7626 3884 7626 3878 7621
3888 7620 3900 7574 3867 7571 3870 7590
3857 7604 3868 7621 3876 7622 3872 7630
3878 7629 3867 7634 3873 7633 3876 7638
$$
MWG2 follow-up statements
143
WGUS71 KPHI 071904
FFSPHI
Flash Flood Statement
National Weather Service Mount Holly NJ
304 PM EDT MON AUG 7 2017
MDC011-035-041-072130-
/O.CON.KPHI.FF.W.0046.000000T0000Z-170807T2130Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Talbot MD-Queen Anne's MD-Caroline MD-
304 PM EDT MON AUG 7 2017
...THE FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 530 PM EDT FOR
TALBOT...SOUTH CENTRAL QUEEN ANNE'S AND CAROLINE COUNTIES...
At 302 PM EDT...Doppler radar indicated thunderstorms producing heavy
rain across the warned area. Up to three inches of rain have already
fallen. Flash flooding is expected to begin shortly.
Some locations that could experience flooding include...
Easton, Talbot, Denton, Federalsburg, Greensboro, Ridgely, Trappe,
St. Michaels, Preston, Oxford, Queen Anne, Smithville, Copperville,
Agner, Choptank, Windyhill, Tanyard, Harmony, Tilghman Island and
Skipton.
Additional rainfall is likely to move back into the warning area
over the next couple of hours.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Please report flooding to your local law enforcement agency when you
can do so safely.
&&
LAT...LON 3876 7633 3886 7626 3884 7626 3878 7621
3888 7620 3900 7574 3867 7571 3870 7590
3857 7604 3868 7621 3876 7622 3872 7630
3878 7629 3867 7634 3873 7633 3876 7638
$$
MWG315
WGUS71 KPHI 072128
FFSPHI
Flash Flood Statement
National Weather Service Mount Holly NJ
528 PM EDT MON AUG 7 2017
MDC011-035-041-072136-
/O.EXP.KPHI.FF.W.0046.000000T0000Z-170807T2130Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Talbot MD-Queen Anne's MD-Caroline MD-
528 PM EDT MON AUG 7 2017
...THE FLASH FLOOD WARNING FOR TALBOT...SOUTH CENTRAL QUEEN ANNE'S
AND CAROLINE COUNTIES WILL EXPIRE AT 530 PM EDT...
The heavy rain has ended. Flooding is expected in spots that saw the
heaviest rainfall of three to five inches this afternoon with a
flood warning in effect through most of the evening.
LAT...LON 3876 7633 3886 7626 3884 7626 3878 7621
3888 7620 3900 7574 3867 7571 3870 7590
3857 7604 3868 7621 3876 7622 3872 7630
3878 7629 3867 7634 3873 7633 3876 7638
$$
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, 10:44 AM EDT | Flash Flood Warning | PHI | Caroline, Queen Anne's, Talbot | 4 hr |
| Aug 7, 11:41 AM EDT | Areal Flood Advisory | PHI | Caroline, Talbot | 3 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 |
Nearby
Flash Flood Warnings in Maryland, 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; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.