Alert archive / Maryland / Flash Flood Warnings in 2026
Flash Flood Warning 125, NWS Philadelphia/Mount Holly
NWS Philadelphia/Mount Holly issued this flash flood warning at Aug 20, 2026, 6:53 PM EDT for Kent County, Delaware; Caroline County, Queen Anne's County, Maryland. It was in force for 105 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
- Aug 20, 2026, 6:53 PM EDT (22:53 UTC)
- Expired
- Aug 20, 2026, 8:38 PM EDT
- In force
- 105 min
- Issued by
- NWS Philadelphia/Mount Holly
- Area
- Storm-based polygon
- Damage threat
- Considerable
- Flood severity
- None
Counties Kent County, DE, Caroline County, MD, Queen Anne's County, MD
The radar
The Dover AFB radar (KDOX), 33 km from the middle of the area, began a volume at 22:52 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
Washington/Dulle, VA (KIAD), launched 12:00Z, 10.9 hours before the alert went out and 141 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
- 97 J/kg
- Mixed-layer CIN
- -72 J/kg
- Mixed-layer LCL
- 1192 m above ground
- 0-6 km bulk shear
- 47 kt
- 0-1 km storm-relative helicity
- 115 m²/s²
- 0-3 km storm-relative helicity
- 230 m²/s²
- Significant tornado parameter
- -0.0
- Supercell composite
- -0.0
The text
As transmitted.
312
WGUS51 KPHI 202253
FFWPHI
DEC001-MDC011-035-210300-
/O.NEW.KPHI.FF.W.0125.260820T2253Z-260821T0300Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
BULLETIN - EAS ACTIVATION REQUESTED
Flash Flood Warning
National Weather Service Mount Holly NJ
Issued by National Weather Service New York NY
653 PM EDT Thu Aug 20 2026
The National Weather Service in Mount Holly has issued a
* Flash Flood Warning for...
Southern Kent County in central Delaware...
Northern Caroline County in eastern Maryland...
Southeastern Queen Anne's County in northeastern Maryland...
* Until 1100 PM EDT.
* At 653 PM EDT, Doppler radar indicated thunderstorms producing
heavy rain across the warned area. Between 1.5 and 2.5 inches of
rain have fallen. The expected rainfall rate is 1.5 to 2.5 inches
in 1 hour. Additional rainfall amounts of 1 to 3 inches are
possible in the warned area. Flash flooding is ongoing or expected
to begin shortly.
HAZARD...Life threatening flash flooding. Thunderstorms producing
flash flooding.
SOURCE...Radar indicated.
IMPACT...Life threatening flash flooding of creeks and streams,
urban areas, highways, streets and underpasses.
* Some locations that will experience flash flooding include...
Dover, Denton, Harrington, Camden, Greensboro, Oakland, Ridgely,
Bowers, Goldsboro, Woodside and Viola.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Turn around, don't drown when encountering flooded roads. Most flood
deaths occur in vehicles.
&&
LAT...LON 3893 7600 3902 7596 3907 7590 3911 7582
3914 7568 3915 7551 3912 7540 3907 7539
3904 7535 3899 7532 3895 7544 3887 7578
3885 7593 3886 7592 3887 7594 3888 7594
3888 7595 3889 7594 3889 7595 3892 7594
FLASH FLOOD...RADAR INDICATED
FLASH FLOOD DAMAGE THREAT...CONSIDERABLE
EXPECTED RAINFALL RATE...1.5-2.5 INCHES IN 1 HOUR
$$
Hoeflich1 follow-up statement
420
WGUS71 KPHI 210038
FFSPHI
Flash Flood Statement
National Weather Service Mount Holly NJ
Issued by National Weather Service New York NY
838 PM EDT Thu Aug 20 2026
DEC001-MDC011-035-210048-
/O.CAN.KPHI.FF.W.0125.000000T0000Z-260821T0300Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Kent DE-Caroline MD-Queen Anne's MD-
838 PM EDT Thu Aug 20 2026
...FLASH FLOOD WARNING IS CANCELLED FOR SOUTHERN KENT, NORTHERN
CAROLINE AND SOUTHEASTERN QUEEN ANNE'S COUNTIES...
Flood waters have receded. The heavy rain has ended. Flooding is no
longer expected to pose a threat. Please continue to heed remaining
road closures.
&&
LAT...LON 3893 7600 3902 7596 3907 7590 3911 7582
3914 7568 3915 7551 3912 7540 3907 7539
3904 7535 3899 7532 3895 7544 3887 7578
3885 7593 3886 7592 3887 7594 3888 7594
3888 7595 3889 7594 3889 7595 3892 7594
$$The office that day
Everything else NWS Philadelphia/Mount Holly issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Aug 20, 4:16 PM EDT | Tornado Warning | PHI | Kent | 29 min |
| Aug 20, 4:50 PM EDT | Severe Thunderstorm Warning | PHI | New Castle | 40 min |
| Aug 20, 5:27 PM EDT | Severe Thunderstorm Warning | PHI | New Castle | 48 min |
| Aug 20, 5:39 PM EDT | Flash Flood Warning | PHI | New Castle | 4 hr |
| Aug 20, 5:39 PM EDT | Tornado Warning | PHI | Kent | 36 min |
| Aug 20, 5:40 PM EDT | Severe Thunderstorm Warning | PHI | Kent | 50 min |
| Aug 20, 6:03 PM EDT | Tornado Warning | PHI | Kent | 42 min |
| Aug 20, 6:09 PM EDT | Severe Thunderstorm Warning | PHI | Kent, New Castle | 51 min |
| Aug 20, 6:13 PM EDT | Severe Thunderstorm Warning | PHI | New Castle | 47 min |
| Aug 20, 6:21 PM EDT | Severe Thunderstorm Warning | PHI | Kent, Sussex | 39 min |
| Aug 20, 6:57 PM EDT | Severe Thunderstorm Warning | PHI | Kent, Sussex | 48 min |
| Aug 20, 2:43 PM EDT | Tornado Warning | PHI | Kent, Queen Anne's | 32 min |
| Aug 20, 5:05 PM EDT | Severe Thunderstorm Warning | PHI | Caroline, Kent, Queen Anne's, Talbot | 40 min |
| Aug 20, 5:30 PM EDT | Tornado Warning | PHI | Kent, Queen Anne's | 30 min |
Nearby
Flash Flood Warnings in Maryland, 2026Flash Flood Warnings in Delaware, 2026Every flash flood warning in 2026
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.