Alert archive / Delaware / Flash Flood Warnings in 2024
Flash Flood Warning 18, NWS Philadelphia/Mount Holly
NWS Philadelphia/Mount Holly issued this flash flood warning at Jul 12, 2024, 3:13 PM EDT for Sussex County, Delaware. It was in force for 117 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
- Jul 12, 2024, 3:13 PM EDT (19:13 UTC)
- Expired
- Jul 12, 2024, 5:10 PM EDT
- In force
- 117 min
- Issued by
- NWS Philadelphia/Mount Holly
- Area
- Storm-based polygon
- Damage threat
- Considerable
- Flood severity
- None
County Sussex County, DE
The radar
The Dover AFB radar (KDOX), 23 km from the middle of the area, began a volume at 19:18 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, 7.2 hours before the alert went out and 77 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
- 1467 J/kg
- Mixed-layer CIN
- -3 J/kg
- Mixed-layer LCL
- 533 m above ground
- 0-6 km bulk shear
- 10 kt
- 0-1 km storm-relative helicity
- -13 m²/s²
- 0-3 km storm-relative helicity
- 10 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted.
646
WGUS51 KPHI 121913
FFWPHI
DEC005-122315-
/O.NEW.KPHI.FF.W.0018.240712T1913Z-240712T2315Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
BULLETIN - EAS ACTIVATION REQUESTED
Flash Flood Warning
National Weather Service Mount Holly NJ
313 PM EDT Fri Jul 12 2024
The National Weather Service in Mount Holly has issued a
* Flash Flood Warning for...
Southwestern Sussex County in southern Delaware...
* Until 715 PM EDT.
* At 313 PM EDT, Doppler radar indicated thunderstorms producing
heavy rain across the warned area. Between 3 and 5 inches of rain
have fallen. The expected rainfall rate is 1 to 3 inches in 1
hour. Additional rainfall amounts of 1.5 to 3.5 inches are
possible in the warned area. Flash flooding is ongoing or expected
to begin shortly.
HAZARD...Life threatening flash flooding caused by
thunderstorms.
SOURCE...Radar.
IMPACT...Life threatening flash flooding of creeks and streams,
urban areas, highways, streets, and underpasses.
* Some locations that may experience flash flooding include...
Georgetown, Seaford, Millsboro, Laurel, Sycamore, Blades and
Bethel.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Turn around...don't drown when encountering flooded roads. Most
flood deaths occur in vehicles.
&&
LAT...LON 3854 7559 3857 7564 3865 7562 3873 7543
3874 7540 3870 7535 3866 7530 3864 7529
3860 7528 3852 7536 3852 7558
FLASH FLOOD...RADAR INDICATED
FLASH FLOOD DAMAGE THREAT...CONSIDERABLE
EXPECTED RAINFALL RATE...1-3 INCHES IN 1 HOUR
$$
Hoeflich1 follow-up statement
058
WGUS71 KPHI 122110
FFSPHI
Flash Flood Statement
National Weather Service Mount Holly NJ
510 PM EDT Fri Jul 12 2024
DEC005-122120-
/O.CAN.KPHI.FF.W.0018.000000T0000Z-240712T2315Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Sussex DE-
510 PM EDT Fri Jul 12 2024
...FLASH FLOOD WARNING IS CANCELLED FOR SOUTHWESTERN SUSSEX COUNTY...
At this time, the heavy rain has ended and flash flooding is no
longer expected to pose a threat. However, 3 to 6 inches of rain
have fallen across the warned area over the past 12-18 hours.
Therefore, a Flood Warning remains in effect. Please continue to
heed remaining road closures.
&&
LAT...LON 3854 7559 3857 7564 3865 7562 3873 7543
3874 7540 3870 7535 3866 7530 3864 7529
3860 7528 3852 7536 3852 7558
$$
AKLThe office that day
Everything else NWS Philadelphia/Mount Holly issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jul 12, 12:59 PM EDT | Areal Flood Warning | PHI | Sussex | 6 hr |
| Jul 12, 3:37 PM EDT | Excessive Heat Watch | PHI | Kent, New Castle, Sussex | 72 hr |
| Jul 12, 3:37 PM EDT | Heat Advisory | PHI | Kent, New Castle, Sussex | 5 days |
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.