Alert archive / Delaware / Flash Flood Warnings in 2023
Flash Flood Warning 59, NWS Philadelphia/Mount Holly
NWS Philadelphia/Mount Holly issued this flash flood warning at Jul 16, 2023, 3:54 AM EDT for Caroline County, Maryland; Kent County, 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
- Jul 16, 2023, 3:54 AM EDT (07:54 UTC)
- Expired
- Jul 16, 2023, 8:00 AM EDT
- In force
- 4 hr
- Issued by
- NWS Philadelphia/Mount Holly
- Area
- Storm-based polygon
- Flood severity
- None
Counties Kent County, DE, Sussex County, DE, Caroline County, MD
The nearest sounding before it
Wallops Is Stn, VA (KWAL), launched 00:00Z, 7.9 hours before the alert went out and 99 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
- 1610 J/kg
- Mixed-layer CIN
- -35 J/kg
- Mixed-layer LCL
- 852 m above ground
- 0-6 km bulk shear
- 17 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.
749
WGUS51 KPHI 160754
FFWPHI
DEC001-005-MDC011-161200-
/O.NEW.KPHI.FF.W.0059.230716T0754Z-230716T1200Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
BULLETIN - EAS ACTIVATION REQUESTED
Flash Flood Warning
National Weather Service Mount Holly NJ
354 AM EDT Sun Jul 16 2023
The National Weather Service in Mount Holly has issued a
* Flash Flood Warning for...
Southeastern Kent County in central Delaware...
Northwestern Sussex County in southern Delaware...
Southeastern Caroline County in eastern Maryland...
* Until 800 AM EDT.
* At 354 AM EDT, Doppler radar and automated rain gauges indicated
thunderstorms producing heavy rain across the warned area. Between
1 and 2 inches of rain have fallen. The expected rainfall rate is
1 to 1.5 inches in 1 hour. Additional rainfall amounts of 1 to 2
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...
Dover, Milford, Harrington, Federalsburg, Bridgeville, Bowers,
Viola, Andrewsville, Rising Sun-Lebanon, Rising Sun, Dover Base
Housing, and Big Stone Beach.
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.
&&
LAT...LON 3870 7586 3922 7542 3899 7521 3863 7571
3869 7576 3868 7580 3870 7580
FLASH FLOOD...RADAR AND GAUGE INDICATED
EXPECTED RAINFALL RATE...1-1.5 INCHES IN 1 HOUR
$$
SFJ2 follow-up statements
449
WGUS71 KPHI 160915
FFSPHI
Flash Flood Statement
National Weather Service Mount Holly NJ
515 AM EDT Sun Jul 16 2023
DEC001-005-MDC011-161200-
/O.CON.KPHI.FF.W.0059.000000T0000Z-230716T1200Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Kent DE-Sussex DE-Caroline MD-
515 AM EDT Sun Jul 16 2023
...FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 8 AM EDT THIS MORNING
FOR SOUTHEASTERN KENT, NORTHWESTERN SUSSEX, AND SOUTHEASTERN
CAROLINE COUNTIES...
At 515 AM EDT, Doppler radar and automated rain gauges indicated
thunderstorms producing heavy rain across the warned area. Between 2
and 4 inches of rain have fallen. The expected rainfall rate is 1 to
1.5 inches in 1 hour. Additional rainfall amounts of 1 to 2 inches
are possible in the warned area. Flash flooding is ongoing or
expected to begin shortly.
HAZARD...Flash flooding caused by thunderstorms.
SOURCE...Radar and automated gauges.
IMPACT...Flooding of small creeks and streams, urban areas,
highways, streets, and underpasses as well as other
drainage and low lying areas.
Some locations that may experience flash flooding include...
Dover, Milford, Harrington, Federalsburg, Bridgeville, Bowers,
Viola, Andrewsville, Rising Sun-Lebanon, Rising Sun, Dover Base
Housing, and Big Stone Beach.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Turn around...don't drown when encountering flooded roads. Most
flood deaths occur in vehicles.
&&
LAT...LON 3870 7586 3922 7542 3899 7521 3863 7571
3869 7576 3868 7580 3870 7580
FLASH FLOOD...RADAR AND GAUGE INDICATED
EXPECTED RAINFALL RATE...1-1.5 INCHES IN 1 HOUR
$$
SFJ671
WGUS71 KPHI 161155
FFSPHI
Flash Flood Statement
National Weather Service Mount Holly NJ
755 AM EDT Sun Jul 16 2023
DEC001-005-MDC011-161205-
/O.EXP.KPHI.FF.W.0059.000000T0000Z-230716T1200Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Kent DE-Sussex DE-Caroline MD-
755 AM EDT Sun Jul 16 2023
...FLASH FLOOD WARNING WILL EXPIRE AT 8 AM EDT THIS MORNING FOR
SOUTHEASTERN KENT, NORTHWESTERN SUSSEX, AND SOUTHEASTERN CAROLINE
COUNTIES...
Flood waters have receded. The heavy rain has ended. Flooding is no
longer expected to pose a threat.
A Flood Watch remains in effect until 400 PM EDT Sunday for portions
of Delaware...and northeast Maryland.
LAT...LON 3870 7586 3922 7542 3899 7521 3863 7571
3869 7576 3868 7580 3870 7580
$$
MJLThe office that day
Everything else NWS Philadelphia/Mount Holly issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jul 16, 1:21 AM EDT | Special Weather Statement | PHI | Caroline, Queen Anne's | 24 min |
| Jul 16, 2:17 AM EDT | Special Weather Statement | PHI | Kent, Queen Anne's | 28 min |
| Jul 16, 12:19 PM EDT | Areal Flood Advisory | PHI | Caroline | 60 min |
| Jul 16, 1:19 PM EDT | Flash Flood Warning | PHI | Caroline | 4 hr |
| Jul 16, 2:47 AM EDT | Special Weather Statement | PHI | New Castle | 28 min |
| Jul 16, 3:09 AM EDT | Special Weather Statement | PHI | Kent | 36 min |
| Jul 16, 7:02 AM EDT | Flash Flood Warning | PHI | Sussex | 108 min |
| Jul 16, 11:08 AM EDT | Flash Flood Warning | PHI | New Castle | 3 hr |
| Jul 16, 1:08 PM EDT | Areal Flood Advisory | PHI | Kent, New Castle | 3 hr |
| Jul 16, 1:42 PM EDT | Special Weather Statement | PHI | Kent | 33 min |
| Jul 16, 1:47 PM EDT | Areal Flood Advisory | PHI | New Castle | 80 min |
| Jul 16, 2:23 PM EDT | Areal Flood Advisory | PHI | Sussex | 71 min |
| Jul 16, 3:34 PM EDT | Flash Flood Warning | PHI | Sussex | 116 min |
Nearby
Flash Flood Warnings in Delaware, 2023Flash Flood Warnings in Maryland, 2023Every flash flood warning in 2023
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.