Alert archive / Delaware / Flash Flood Warnings in 2019
Flash Flood Warning 82, NWS Philadelphia/Mount Holly
NWS Philadelphia/Mount Holly issued this flash flood warning at Aug 19, 2019, 3:28 PM EDT for Sussex County, Delaware. It was in force for 3 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 19, 2019, 3:28 PM EDT (19:28 UTC)
- Expired
- Aug 19, 2019, 6:03 PM EDT
- In force
- 3 hr
- Issued by
- NWS Philadelphia/Mount Holly
- Area
- Storm-based polygon
- Flood severity
- None
County Sussex County, DE
The radar
The Dover AFB radar (KDOX), 45 km from the middle of the area, began a volume at 19:27 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
Wallops Is Stn, VA (KWAL), launched 12:00Z, 7.5 hours before the alert went out and 68 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
- 1552 J/kg
- Mixed-layer CIN
- -43 J/kg
- Mixed-layer LCL
- 1081 m above ground
- 0-6 km bulk shear
- 17 kt
- 0-1 km storm-relative helicity
- 54 m²/s²
- 0-3 km storm-relative helicity
- 48 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted.
863
WGUS51 KPHI 191928
FFWPHI
DEC005-192330-
/O.NEW.KPHI.FF.W.0082.190819T1928Z-190819T2330Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
BULLETIN - EAS ACTIVATION REQUESTED
Flash Flood Warning
National Weather Service Mount Holly NJ
328 PM EDT Mon Aug 19 2019
The National Weather Service in Mount Holly NJ has issued a
* Flash Flood Warning for...
Southeastern Sussex County in southern Delaware...
* Until 730 PM EDT.
* At 328 PM EDT, Doppler radar and automated rain gauges indicated
thunderstorms producing heavy rain across the warned area. Over
three 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...
Selbyville, Millville, Long Neck, Ocean View and South Bethany.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Turn around...don't drown when encountering flooded roads. Most flood
deaths occur in vehicles.
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 3845 7525 3862 7519 3862 7504 3845 7504
3846 7505 3845 7505
$$
PO1 follow-up statement
290
WGUS71 KPHI 192203
FFSPHI
Flash Flood Statement
National Weather Service Mount Holly NJ
603 PM EDT Mon Aug 19 2019
DEC005-192212-
/O.CAN.KPHI.FF.W.0082.000000T0000Z-190819T2330Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Sussex DE-
603 PM EDT Mon Aug 19 2019
...THE FLASH FLOOD WARNING FOR SOUTHEASTERN SUSSEX COUNTY IS
CANCELLED...
The heavy rain has ended. Flood waters have receded. Flooding is no
longer expected to pose a threat. Please continue to heed any
remaining road closures.
LAT...LON 3845 7525 3862 7519 3862 7504 3845 7504
3846 7505 3845 7505
$$
JJMThe office that day
Everything else NWS Philadelphia/Mount Holly issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Aug 19, 12:57 PM EDT | Special Weather Statement | PHI | Sussex | 48 min |
| Aug 19, 1:43 PM EDT | Special Weather Statement | PHI | Sussex | 47 min |
| Aug 19, 1:56 PM EDT | Severe Thunderstorm Warning | PHI | Sussex | 49 min |
| Aug 19, 2:39 PM EDT | Areal Flood Advisory | PHI | Sussex | 2 hr |
| Aug 19, 3:00 PM EDT | Severe Thunderstorm Warning | PHI | Sussex | 45 min |
| Aug 19, 4:40 PM EDT | Special Weather Statement | PHI | Sussex | 50 min |
| Aug 19, 4:41 PM EDT | Special Weather Statement | PHI | Kent | 49 min |
| Aug 19, 4:46 PM EDT | Severe Thunderstorm Warning | PHI | Sussex | 46 min |
| Aug 19, 4:52 PM EDT | Areal Flood Advisory | PHI | Sussex | 68 min |
Nearby
Flash Flood Warnings in Delaware, 2019Every flash flood warning in 2019
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.