Alert archive / Delaware / Flash Flood Warnings in 2018
Flash Flood Warning 96, NWS Philadelphia/Mount Holly
NWS Philadelphia/Mount Holly issued this flash flood warning at Sep 8, 2018, 12:11 AM EDT for Sussex County, Delaware. 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
- Sep 8, 2018, 12:11 AM EDT (04:11 UTC)
- Expired
- Sep 8, 2018, 4:15 AM EDT
- In force
- 4 hr
- Issued by
- NWS Philadelphia/Mount Holly
- Area
- Storm-based polygon
- Flood severity
- None
County Sussex County, DE
The nearest sounding before it
Wallops Is Stn, VA (KWAL), launched 00:00Z, 4.2 hours before the alert went out and 69 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
- 1567 J/kg
- Mixed-layer CIN
- -21 J/kg
- Mixed-layer LCL
- 957 m above ground
- 0-6 km bulk shear
- 11 kt
- 0-1 km storm-relative helicity
- 20 m²/s²
- 0-3 km storm-relative helicity
- 33 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted.
864
WGUS51 KPHI 080411
FFWPHI
DEC005-080815-
/O.NEW.KPHI.FF.W.0096.180908T0411Z-180908T0815Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
BULLETIN - EAS ACTIVATION REQUESTED
Flash Flood Warning
National Weather Service Mount Holly NJ
1211 AM EDT SAT SEP 8 2018
The National Weather Service in Mount Holly NJ has issued a
* Flash Flood Warning for...
Southeastern Sussex County in southern Delaware...
* Until 415 AM EDT.
* At 1211 AM EDT, Doppler radar indicated thunderstorms producing
heavy rain across the warned area. Between one and 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...
Millsboro, Selbyville, Dagsboro, Millville, Long Neck, Ocean View,
Frankford and South Bethany.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Turn around...don't drown when encountering flooded roads. Most flood
deaths occur in vehicles.
Be especially cautious at night when it is harder to recognize the
dangers of flooding.
Excessive runoff from heavy rainfall will cause flooding of small
creeks and streams, urban areas, highways, streets and underpasses as
well as other drainage areas and low lying spots.
Please report flooding to your local law enforcement agency when you
can do so safely.
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 3862 7536 3865 7504 3845 7504 3846 7505
3845 7505 3845 7535
$$
MPS2 follow-up statements
042
WGUS71 KPHI 080721
FFSPHI
Flash Flood Statement
National Weather Service Mount Holly NJ
321 AM EDT SAT SEP 8 2018
DEC005-080815-
/O.CON.KPHI.FF.W.0096.000000T0000Z-180908T0815Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Sussex DE-
321 AM EDT SAT SEP 8 2018
...THE FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 415 AM EDT FOR
SOUTHEASTERN SUSSEX COUNTY...
At 320 AM EDT, Doppler radar indicated that the heavy rain that fell
earlier has ended, but flash flooding is occurring and will continue
through the early morning hours.
Some locations that could experience flooding include...
Millsboro, Selbyville, Dagsboro, Millville, Long Neck, Ocean View,
Frankford and South Bethany.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Turn around...don't drown when encountering flooded roads. Most flood
deaths occur in vehicles.
Be especially cautious at night when it is harder to recognize the
dangers of flooding.
Excessive runoff from heavy rainfall will cause flooding of small
creeks and streams, country roads, farmland, and other low lying
spots.
Please report flooding to your local law enforcement agency when you
can do so safely.
&&
LAT...LON 3862 7536 3865 7504 3845 7504 3846 7505
3845 7505 3845 7535
$$
MPS980
WGUS71 KPHI 080806
FFSPHI
Flash Flood Statement
National Weather Service Mount Holly NJ
406 AM EDT SAT SEP 8 2018
DEC005-080815-
/O.EXP.KPHI.FF.W.0096.000000T0000Z-180908T0815Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Sussex DE-
406 AM EDT SAT SEP 8 2018
...THE FLASH FLOOD WARNING FOR SOUTHEASTERN SUSSEX COUNTY WILL EXPIRE
AT 415 AM EDT...
The heavy rain has ended. Flooding is no longer expected to pose a
threat. Please continue to heed any remaining road closures.
Additional rainfall through this morning may result in more flooding
across this area.
LAT...LON 3862 7536 3865 7504 3845 7504 3846 7505
3845 7505 3845 7535
$$
MPSThe office that day
Everything else NWS Philadelphia/Mount Holly issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Sep 7, 8:32 PM EDT | Flash Flood Warning | PHI | New Castle | 2 hr |
| Sep 7, 11:19 PM EDT | Rip Current Statement | PHI | Sussex | 9 days |
| Sep 7, 11:20 PM EDT | Areal Flood Warning | PHI | New Castle | 4 hr |
| Sep 7, 11:40 PM EDT | Special Weather Statement | PHI | Sussex | 35 min |
| Sep 8, 3:34 AM EDT | Flood Watch | PHI | New Castle | 60 hr |
| Sep 8, 5:31 AM EDT | Coastal Flood Watch | PHI | Kent | 11 hr |
| Sep 8, 5:31 AM EDT | Coastal Flood Advisory | PHI | New Castle, Sussex | 21 hr |
| Sep 8, 8:15 AM EDT | Areal Flood Advisory | PHI | New Castle | 119 min |
| Sep 8, 11:54 AM EDT | Special Weather Statement | PHI | Sussex | 21 min |
| Sep 8, 4:49 PM EDT | Coastal Flood Watch | PHI | Kent, New Castle, Sussex | 7 hr |
| Sep 8, 4:49 PM EDT | Coastal Flood Warning | PHI | Kent, Sussex | 6 hr |
| Sep 8, 4:49 PM EDT | High Surf Advisory | PHI | Sussex | 60 hr |
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; the sounding from the Mesonet's radiosonde archive.