Alert archive / Maryland / Flash Flood Warnings in 2018
Flash Flood Warning 108, NWS Philadelphia/Mount Holly
NWS Philadelphia/Mount Holly issued this flash flood warning at Oct 11, 2018, 11:47 PM EDT for Caroline County, Talbot County, Maryland; Kent County, Sussex County, Delaware. It was in force for 4 hr. 2 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
- Oct 11, 2018, 11:47 PM EDT (03:47 UTC)
- Expired
- Oct 12, 2018, 3:31 AM EDT
- In force
- 4 hr
- Issued by
- NWS Philadelphia/Mount Holly
- Area
- Storm-based polygon
- Flood severity
- None
Counties Kent County, DE, Sussex County, DE, Caroline County, MD, Talbot County, MD
The radar
The Dover AFB radar (KDOX), 21 km from the middle of the area, began a volume at 03:49 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 12, 2:04 AM EDT | FLOOD | Rehoboth Beach, DE | RT 1 HAS STANDING WATER ON ROADWAY FROM REHOBOTH BEACH TO FENWICK ISLAND. |
| Oct 12, 2:30 AM EDT | FLOOD | 2 N Millsboro, DE | DOC FRAME ROAD CLOSED FROM FLOODING. TIME ESTIMATED. |
Local storm reports filed while the alert was in force, from inside its polygon or its counties.
The nearest sounding before it
Wallops Is Stn, VA (KWAL), launched 00:00Z, 3.8 hours before the alert went out and 87 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
- 959 J/kg
- Mixed-layer CIN
- -11 J/kg
- Mixed-layer LCL
- 634 m above ground
- 0-6 km bulk shear
- 49 kt
- 0-1 km storm-relative helicity
- 212 m²/s²
- 0-3 km storm-relative helicity
- 200 m²/s²
- Significant tornado parameter
- 1.1
- Supercell composite
- 4.3
The text
As transmitted.
154
WGUS51 KPHI 120347
FFWPHI
DEC001-005-MDC011-041-120745-
/O.NEW.KPHI.FF.W.0108.181012T0347Z-181012T0745Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
BULLETIN - EAS ACTIVATION REQUESTED
Flash Flood Warning
National Weather Service Mount Holly NJ
1147 PM EDT THU OCT 11 2018
The National Weather Service in Mount Holly NJ has issued a
* Flash Flood Warning for...
Sussex County in southern Delaware...
Southern Kent County in central Delaware...
Southeastern Talbot County in eastern Maryland...
Southern Caroline County in eastern Maryland...
* Until 345 AM EDT.
* At 1143 PM EDT, Doppler radar indicated heavy rain across portions
of the warned area. Up to two inches of rain have already fallen.
Additional rainfall amounts of two inches are possible. This
amount of rainfall is capable of producing flash flooding.
* Some locations that could experience flooding include...
Georgetown, Milford, Seaford, Millsboro, Laurel, Harrington, Lewes,
Federalsburg, Milton, Selbyville, Bridgeville, Delmar, Trappe,
Dagsboro, Preston, Millville, Ellendale, Bowers, Henlopen Acres and
Smithville.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Be especially cautious at night when it is harder to recognize the
dangers of flooding.
&&
LAT...LON 3846 7569 3864 7571 3869 7577 3868 7580
3870 7580 3871 7584 3868 7593 3864 7597
3864 7615 3865 7615 3908 7537 3905 7537
3892 7528 3881 7514 3881 7506 3846 7504
3845 7539
$$
Kruzdlo1 follow-up statement
048
WGUS71 KPHI 120731
FFSPHI
Flash Flood Statement
National Weather Service Mount Holly NJ
331 AM EDT FRI OCT 12 2018
DEC001-005-MDC011-041-120739-
/O.CAN.KPHI.FF.W.0108.000000T0000Z-181012T0745Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Sussex DE-Kent DE-Talbot MD-Caroline MD-
331 AM EDT FRI OCT 12 2018
...THE FLASH FLOOD WARNING FOR SUSSEX...SOUTHERN KENT...SOUTHEASTERN
TALBOT AND SOUTHERN CAROLINE COUNTIES IS CANCELLED...
This flash flood warning has been converted to a flood warning.
Three to five inches of rain fell since last evening. It will take
some time to drain.
LAT...LON 3846 7569 3864 7571 3869 7577 3868 7580
3870 7580 3871 7584 3868 7593 3864 7597
3864 7615 3865 7615 3908 7537 3905 7537
3892 7528 3881 7514 3881 7506 3846 7504
3845 7539
$$
KruzdloThe office that day
Everything else NWS Philadelphia/Mount Holly issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Oct 11, 8:27 PM EDT | Areal Flood Advisory | PHI | Cecil, Kent, Queen Anne's | 8 hr |
| Oct 11, 10:06 PM EDT | Flash Flood Warning | PHI | Caroline, Kent, Queen Anne's, Talbot | 6 hr |
| Oct 11, 11:36 PM EDT | Flash Flood Warning | PHI | Kent, Queen Anne's | 4 hr |
| Oct 12, 12:08 AM EDT | Flash Flood Warning | PHI | Kent, Queen Anne's | 4 hr |
| Oct 12, 3:28 AM EDT | Areal Flood Warning | PHI | Caroline, Talbot | 6 hr |
| Oct 12, 3:36 AM EDT | Areal Flood Warning | PHI | Caroline, Kent, Queen Anne's, Talbot | 6 hr |
| Oct 12, 3:46 AM EDT | Areal Flood Warning | PHI | Kent, Queen Anne's | 7 hr |
| Oct 11, 11:54 PM EDT | High Wind Warning | PHI | Sussex | 9 hr |
| Oct 12, 11:42 AM EDT | Coastal Flood Advisory | PHI | Sussex | 4 hr |
| Oct 12, 2:46 PM EDT | Areal Flood Warning | PHI | Kent | 7 hr |
Nearby
Flash Flood Warnings in Maryland, 2018Flash Flood Warnings in Delaware, 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.