Alert archive / Delaware / Flash Flood Warnings in 2024
Flash Flood Warning 1, NWS Philadelphia/Mount Holly
NWS Philadelphia/Mount Holly issued this flash flood warning at May 26, 2024, 5:11 PM EDT for Sussex County, Delaware. It was in force for 70 min. No storm report in the archive falls inside the area while it was in force.
The area
The outline as issued.
The facts
- Issued
- May 26, 2024, 5:11 PM EDT (21:11 UTC)
- Expired
- May 26, 2024, 6:21 PM EDT
- In force
- 70 min
- Issued by
- NWS Philadelphia/Mount Holly
- Area
- Storm-based polygon
- Flood severity
- None
County Sussex County, DE
The radar
The Dover AFB radar (KDOX), 19 km from the middle of the area, began a volume at 21:15 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, 9.2 hours before the alert went out and 93 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
- 1139 J/kg
- Mixed-layer CIN
- -32 J/kg
- Mixed-layer LCL
- 703 m above ground
- 0-6 km bulk shear
- 12 kt
- 0-1 km storm-relative helicity
- -2 m²/s²
- 0-3 km storm-relative helicity
- 3 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted.
971
WGUS51 KPHI 262111
FFWPHI
DEC005-270015-
/O.NEW.KPHI.FF.W.0001.240526T2111Z-240527T0015Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
BULLETIN - EAS ACTIVATION REQUESTED
Flash Flood Warning
National Weather Service Mount Holly NJ
511 PM EDT Sun May 26 2024
The National Weather Service in Mount Holly has issued a
* Flash Flood Warning for...
West Central Sussex County in southern Delaware...
* Until 815 PM EDT.
* At 511 PM EDT, Doppler radar and automated rain gauges indicated
thunderstorms producing heavy rain across the warned area. Between
2 and 3 inches of rain have fallen. Additional rainfall amounts of
1 to 1.5 inches are possible in the warned area. Flash flooding is
ongoing or expected to begin shortly.
HAZARD...Flash flooding caused by thunderstorms.
SOURCE...Radar and automated gauges.
IMPACT...Flooding of small creeks and streams, urban areas,
highways, streets, and underpasses as well as other
drainage and low lying areas.
* Some locations that may experience flash flooding include...
Bridgeville and Greenwood.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Turn around...don't drown when encountering flooded roads. Most
flood deaths occur in vehicles.
Be aware of your surroundings and do not drive on flooded roads.
&&
LAT...LON 3870 7569 3879 7569 3881 7555 3872 7554
FLASH FLOOD...RADAR AND GAUGE INDICATED
EXPECTED RAINFALL RATE...1-1.5 INCHES IN 1 HOUR
$$
PO1 follow-up statement
233 WGUS71 KPHI 262221 FFSPHI Flash Flood Statement National Weather Service Mount Holly NJ 621 PM EDT Sun May 26 2024 DEC005-262231- /O.CAN.KPHI.FF.W.0001.000000T0000Z-240527T0015Z/ /00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/ Sussex DE- 621 PM EDT Sun May 26 2024 ...FLASH FLOOD WARNING IS CANCELLED FOR WEST CENTRAL SUSSEX COUNTY... The heavy rains have ended. Flooding is no longer expected to pose a threat. Please continue to heed remaining road closures. && LAT...LON 3870 7569 3879 7569 3881 7555 3872 7554 $$ PO
The office that day
Everything else NWS Philadelphia/Mount Holly issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| May 26, 4:30 PM EDT | Severe Thunderstorm Warning | PHI | Kent, Sussex | 30 min |
Nearby
Flash Flood Warnings in Delaware, 2024Every flash flood warning in 2024
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.