Alert archive / Delaware / Flash Flood Warnings in 2018
Flash Flood Warning 98, NWS Philadelphia/Mount Holly
NWS Philadelphia/Mount Holly issued this flash flood warning at Sep 11, 2018, 2:25 PM EDT for Kent County, Sussex County, Delaware. It was in force for 2 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
- Sep 11, 2018, 2:25 PM EDT (18:25 UTC)
- Expired
- Sep 11, 2018, 4:34 PM EDT
- In force
- 2 hr
- Issued by
- NWS Philadelphia/Mount Holly
- Area
- Storm-based polygon
- Flood severity
- None
Counties Kent County, DE, Sussex County, DE
What was reported inside it
| Time | Report | Where | Remark |
|---|---|---|---|
| Sep 11, 2:50 PM EDT | FLASH FLOOD | Milford, DE | WIDESPREAD ROADWAY FLOODING WITH MANY ROADS IMPASSABLE. |
| Sep 11, 3:00 PM EDT | FLOOD | 4 Wsw Bowers, DE | ROUTE 1 AT BOWERS BEACH ROAD CLOSED IN BOTH DIRECTIONS DUE TO FLOODING. |
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 12:00Z, 6.4 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
- 2340 J/kg
- Mixed-layer CIN
- -2 J/kg
- Mixed-layer LCL
- 585 m above ground
- 0-6 km bulk shear
- 24 kt
- 0-1 km storm-relative helicity
- 25 m²/s²
- 0-3 km storm-relative helicity
- 40 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 1.3
The text
As transmitted.
773
WGUS51 KPHI 111825
FFWPHI
DEC001-005-112130-
/O.NEW.KPHI.FF.W.0098.180911T1825Z-180911T2130Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
BULLETIN - EAS ACTIVATION REQUESTED
Flash Flood Warning
National Weather Service Mount Holly NJ
225 PM EDT TUE SEP 11 2018
The National Weather Service in Mount Holly NJ has issued a
* Flash Flood Warning for...
Northwestern Sussex County in southern Delaware...
Southern Kent County in central Delaware...
* Until 530 PM EDT.
* At 225 PM EDT, Doppler radar indicated thunderstorms producing
heavy rain across the warned area. Up to two 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...
Milford, Seaford, Harrington, Bridgeville, Ellendale, Bowers,
Andrewsville, Blades, Greenwood, Frederica, Houston, Farmington and
Riverview.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Excessive runoff from heavy rainfall will cause flooding of small
creeks and streams, country roads, farmland, and other low lying
spots.
A Flash Flood Warning means that flooding is imminent or occurring.
If you are in the warned area move to higher ground immediately.
Residents living along streams and creeks should take immediate
precautions to protect life and property.
&&
LAT...LON 3887 7573 3911 7541 3893 7529 3886 7522
3858 7570
$$
po2 follow-up statements
164
WGUS71 KPHI 111935
FFSPHI
Flash Flood Statement
National Weather Service Mount Holly NJ
335 PM EDT TUE SEP 11 2018
DEC001-005-112130-
/O.CON.KPHI.FF.W.0098.000000T0000Z-180911T2130Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Sussex DE-Kent DE-
335 PM EDT TUE SEP 11 2018
...THE FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 530 PM EDT FOR
NORTHWESTERN SUSSEX AND SOUTHERN KENT COUNTIES...
At 333 PM EDT, local law enforcement reported widespread road
flooding near Milford, DE. Two to three inches of rain have already
fallen. Flash flooding is expected to continue.
Some locations that could experience flooding include...
Milford, Seaford, Harrington, Bridgeville, Ellendale, Bowers,
Andrewsville, Blades, Greenwood, Frederica, Houston, Farmington and
Riverview.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Excessive runoff from heavy rainfall will cause flooding of small
creeks and streams, country roads, farmland, and other low lying
spots. Do not drive where water covers the roads. The road beneath
may be washed away.
&&
LAT...LON 3887 7573 3911 7541 3893 7529 3886 7522
3858 7570
$$
PO402
WGUS71 KPHI 112034
FFSPHI
Flash Flood Statement
National Weather Service Mount Holly NJ
434 PM EDT TUE SEP 11 2018
DEC001-005-112043-
/O.CAN.KPHI.FF.W.0098.000000T0000Z-180911T2130Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Sussex DE-Kent DE-
434 PM EDT TUE SEP 11 2018
...THE FLASH FLOOD WARNING FOR NORTHWESTERN SUSSEX AND SOUTHERN KENT
COUNTIES IS CANCELLED...
The heavy rain has ended. Flooding is no longer expected to pose a
threat. Please continue to heed any remaining road closures.
LAT...LON 3887 7573 3911 7541 3893 7529 3886 7522
3858 7570
$$
poThe office that day
Everything else NWS Philadelphia/Mount Holly issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Sep 11, 4:40 AM EDT | Coastal Flood Advisory | PHI | Kent, New Castle, Sussex | 10 hr |
| Sep 11, 3:40 PM EDT | Areal Flood Advisory | PHI | Kent | 78 min |
Nearby
Flash 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.