Alert archive / Maryland / Flash Flood Warnings in 2018
Flash Flood Warning 105, NWS Philadelphia/Mount Holly
NWS Philadelphia/Mount Holly issued this flash flood warning at Oct 8, 2018, 4:26 PM EDT for 4 counties in Maryland. It was in force for 3 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
- Oct 8, 2018, 4:26 PM EDT (20:26 UTC)
- Expired
- Oct 8, 2018, 7:15 PM EDT
- In force
- 3 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), 66 km from the middle of the area, began a volume at 20:30 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 |
|---|---|---|---|
| Oct 8, 5:30 PM EDT | FLOOD | 1 N Wye Mills, MD | PARKING LOT FLOODING AND SWIFT WATER MOVING ACROSS ROADS IN THE AREA OF CHESAPEAKE COLLEGE. TIME ESTIMATED. |
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, 8.4 hours before the alert went out and 105 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
- 675 J/kg
- Mixed-layer CIN
- -27 J/kg
- Mixed-layer LCL
- 539 m above ground
- 0-6 km bulk shear
- 6 kt
- 0-1 km storm-relative helicity
- -40 m²/s²
- 0-3 km storm-relative helicity
- -9 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted.
758
WGUS51 KPHI 082026
FFWPHI
MDC011-029-035-041-082315-
/O.NEW.KPHI.FF.W.0105.181008T2026Z-181008T2315Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
BULLETIN - EAS ACTIVATION REQUESTED
Flash Flood Warning
National Weather Service Mount Holly NJ
426 PM EDT MON OCT 8 2018
The National Weather Service in Mount Holly NJ has issued a
* Flash Flood Warning for...
Talbot County in eastern Maryland...
Queen Anne's County in northeastern Maryland...
Caroline County in eastern Maryland...
Western Kent County in northeastern Maryland...
* Until 715 PM EDT.
* At 420 PM EDT, Doppler radar indicated a line of intermittent
heavy rain extending from near Rock Hall in Kent County southeast
to near Federalsburg in Caroline County. Dopper radar estimates of
between one and two inches of rain in less than one-half hour have
been indicated in a few spots along this line, including near Wye
Mills and Skipton. A few heavy downpours have also been indicated
near Saint Michaels. These isolated areas of heavy rain have shown
little movement during the past 30 minutes, so flash flooding is
likely.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Turn around...don't drown when encountering flooded roads. Most flood
deaths occur in vehicles.
&&
LAT...LON 3875 7635 3886 7626 3879 7620 3879 7619
3897 7625 3884 7637 3885 7638 3895 7636
3900 7617 3901 7620 3901 7621 3917 7628
3934 7616 3885 7573 3865 7572 3870 7590
3857 7602 3876 7632 3867 7634 3876 7638
$$
jjm3 follow-up statements
141
WGUS71 KPHI 082117
FFSPHI
Flash Flood Statement
National Weather Service Mount Holly NJ
517 PM EDT MON OCT 8 2018
MDC011-029-035-041-082315-
/O.CON.KPHI.FF.W.0105.000000T0000Z-181008T2315Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Talbot MD-Queen Anne's MD-Caroline MD-Kent MD-
517 PM EDT MON OCT 8 2018
...THE FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 715 PM EDT FOR
TALBOT...SOUTHWESTERN QUEEN ANNE'S...SOUTHERN CAROLINE AND
SOUTHWESTERN KENT COUNTIES...
At 513 PM EDT, Doppler radar continued to indicate very heavy rain
extending from near Easton in Talbot County northward to near Wye
Mills, then northwest to near Queenstown and Overton. Heavy rain
was also indicated west of Grasonville heading toward Stevensville.
Flash flooding is expected in some of the heavy downpours in
these areas.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Turn around...don't drown when encountering flooded roads. Most flood
deaths occur in vehicles.
&&
LAT...LON 3886 7626 3879 7620 3879 7619 3897 7625
3884 7637 3885 7638 3895 7636 3900 7617
3901 7620 3901 7621 3917 7628 3928 7620
3917 7613 3899 7599 3884 7584 3876 7573
3865 7572 3870 7590 3867 7611 3880 7631
$$
JJM466
WGUS71 KPHI 082136
FFSPHI
Flash Flood Statement
National Weather Service Mount Holly NJ
536 PM EDT MON OCT 8 2018
MDC011-082142-
/O.CAN.KPHI.FF.W.0105.000000T0000Z-181008T2315Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Caroline MD-
536 PM EDT MON OCT 8 2018
...THE FLASH FLOOD WARNING FOR SOUTHERN CAROLINE COUNTY IS
CANCELLED...
Heavy rain has moved out of the area...so flooding is no longer
expected to pose a threat.
LAT...LON 3891 7631 3895 7636 3900 7617 3901 7620
3901 7621 3917 7628 3919 7619 3916 7612
3899 7599 3883 7596 3874 7610 3882 7620
3897 7625 3892 7631
$$
MDC029-035-041-082315-
/O.CON.KPHI.FF.W.0105.000000T0000Z-181008T2315Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Talbot MD-Queen Anne's MD-Kent MD-
536 PM EDT MON OCT 8 2018
...THE FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 715 PM EDT FOR
NORTHEASTERN TALBOT...SOUTHWESTERN QUEEN ANNE'S AND SOUTHWESTERN KENT
COUNTIES...
At 532 PM EDT, heavy rain continued over parts of Talbot and Queen
Anne's counties, between Easton, Wye Mills, and Queenstown. Doppler
radar estimates between 3 and 5 inches of rain fell in the Wye Mills
area since mid-afternoon. Any additional rain will just make
matters worse.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Turn around...don't drown when encountering flooded roads. Most flood
deaths occur in vehicles.
&&
LAT...LON 3891 7631 3895 7636 3900 7617 3901 7620
3901 7621 3917 7628 3919 7619 3916 7612
3899 7599 3883 7596 3874 7610 3882 7620
3897 7625 3892 7631
$$
JJM178
WGUS71 KPHI 082306
FFSPHI
Flash Flood Statement
National Weather Service Mount Holly NJ
706 PM EDT MON OCT 8 2018
MDC029-035-041-082315-
/O.EXP.KPHI.FF.W.0105.000000T0000Z-181008T2315Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Talbot MD-Queen Anne's MD-Kent MD-
706 PM EDT MON OCT 8 2018
...THE FLASH FLOOD WARNING FOR NORTHEASTERN TALBOT...SOUTHWESTERN
QUEEN ANNE'S AND SOUTHWESTERN KENT COUNTIES WILL EXPIRE AT 715 PM
EDT...
The heaviest rain has ended. A few lingering light showers may
continue, but flooding is no longer expected to pose a threat.
Please continue to heed any remaining road closures.
LAT...LON 3891 7631 3895 7636 3900 7617 3901 7620
3901 7621 3917 7628 3919 7619 3916 7612
3899 7599 3883 7596 3874 7610 3882 7620
3897 7625 3892 7631
$$
SFJNearby
Flash Flood Warnings in Maryland, 2018Every flash flood warning in 2018
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.