Alert archive / Maryland / Flash Flood Warnings in 2026
Flash Flood Warning 63, NWS Philadelphia/Mount Holly
NWS Philadelphia/Mount Holly issued this flash flood warning at Jul 21, 2026, 10:42 PM EDT for Kent County, Sussex County, Delaware; Caroline County, Queen Anne's County, Talbot County, Maryland. It was in force for 4 hr. 4 reports came from inside the area while it was in force.
The area
The outline as issued, with what was reported inside it.
The facts
- Issued
- Jul 21, 2026, 10:42 PM EDT (02:42 UTC)
- Expired
- Jul 22, 2026, 2:13 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, Queen Anne's County, MD, Talbot County, MD
The radar
The Dover AFB radar (KDOX), 41 km from the middle of the area, began a volume at 02:45 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.
What was reported inside it
| Time | Report | Where | Remark |
|---|---|---|---|
| Jul 21, 11:00 PM EDT | FLASH FLOOD | Easton, MD | Roadways were flooded in Easton. The flood waters have since receded. |
| Jul 21, 11:55 PM EDT | RAIN 2.52 | 3 W Easton, MD | Mesonet station GW2141 EASTON. |
| Jul 21, 11:55 PM EDT | RAIN 3.08 | Easton Municipal Airpor, MD | AWOS station KESN Easton Newnam. |
| Jul 21, 11:55 PM EDT | RAIN 4.15 | 2 N Harmony, MD | Mesonet station EW4458 Preston. |
Local storm reports filed while the alert was in force, from inside its polygon or its counties.
The nearest sounding before it
Brookhaven, NY (KOKX), launched 00:00Z, 2.7 hours before the alert went out and 347 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
- 935 J/kg
- Mixed-layer CIN
- -9 J/kg
- Mixed-layer LCL
- 555 m above ground
- 0-6 km bulk shear
- 30 kt
- 0-1 km storm-relative helicity
- 169 m²/s²
- 0-3 km storm-relative helicity
- 170 m²/s²
- Significant tornado parameter
- 0.5
- Supercell composite
- 3.2
The text
As transmitted.
568
WGUS51 KPHI 220242
FFWPHI
DEC001-005-MDC011-035-041-220645-
/O.NEW.KPHI.FF.W.0063.260722T0242Z-260722T0645Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
BULLETIN - EAS ACTIVATION REQUESTED
Flash Flood Warning
National Weather Service Mount Holly NJ
1042 PM EDT Tue Jul 21 2026
The National Weather Service in Mount Holly has issued a
* Flash Flood Warning for...
Southern Kent County in central Delaware...
Northern Sussex County in southern Delaware...
Caroline County in eastern Maryland...
Talbot County in eastern Maryland...
South Central Queen Anne's County in northeastern Maryland...
* Until 245 AM EDT.
* At 1042 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 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.
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...
Easton, Talbot, Milford, Denton, Harrington, Lewes, Milton,
Bridgeville, Ridgely, St. Michaels, Preston and Oxford.
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 3885 7627 3879 7619 3889 7620 3902 7535
3899 7516 3884 7500 3878 7500 3873 7516
3867 7617 3871 7624 3877 7624 3872 7630
3878 7628 3867 7634 3876 7638
FLASH FLOOD...RADAR INDICATED
EXPECTED RAINFALL RATE...1.5-2.5 INCHES IN 1 HOUR
$$
Hoeflich2 follow-up statements
883
WGUS71 KPHI 220416
FFSPHI
Flash Flood Statement
National Weather Service Mount Holly NJ
1216 AM EDT Wed Jul 22 2026
DEC001-005-MDC011-035-041-220645-
/O.CON.KPHI.FF.W.0063.000000T0000Z-260722T0645Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Kent DE-Sussex DE-Caroline MD-Queen Anne's MD-Talbot MD-
1216 AM EDT Wed Jul 22 2026
...FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 245 AM EDT EARLY THIS
MORNING FOR SOUTHERN KENT, NORTHERN SUSSEX, CAROLINE, TALBOT AND
SOUTH CENTRAL QUEEN ANNE'S COUNTIES...
At 1216 AM EDT, local law enforcement reported flooding in Easton.
Between 2 and 4 inches of rain have fallen. Flooding impacts will
continue, but no additional rainfall is expected. Flash flooding is
already occurring.
HAZARD...Flash flooding caused by thunderstorms.
SOURCE...Law enforcement reported.
IMPACT...Flooding of small creeks and streams, urban areas,
highways, streets, and underpasses as well as other
drainage and low lying areas.
Some locations that may experience flash flooding include...
Easton, Talbot, Milford, Denton, Harrington, Lewes, Milton,
Bridgeville, Ridgely, St. Michaels, Preston and Oxford.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Turn around...don't drown when encountering flooded roads. Most
flood deaths occur in vehicles.
Be especially cautious at night when it is harder to recognize the
dangers of flooding.
&&
LAT...LON 3885 7627 3879 7619 3889 7620 3902 7535
3899 7516 3884 7500 3878 7500 3873 7516
3867 7617 3871 7624 3877 7624 3872 7630
3878 7628 3867 7634 3876 7638
FLASH FLOOD...OBSERVED
$$
Hoeflich750
WGUS71 KPHI 220613 RRA
FFSPHI
Flash Flood Statement
National Weather Service Mount Holly NJ
213 AM EDT Wed Jul 22 2026
DEC001-005-MDC011-035-041-220623-
/O.CAN.KPHI.FF.W.0063.000000T0000Z-260722T0645Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Kent DE-Sussex DE-Caroline MD-Queen Anne's MD-Talbot MD-
213 AM EDT Wed Jul 22 2026
...FLASH FLOOD WARNING IS CANCELLED FOR SOUTHERN KENT, NORTHERN
SUSSEX, CAROLINE, TALBOT AND SOUTH CENTRAL 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 3885 7627 3879 7619 3889 7620 3902 7535
3899 7516 3884 7500 3878 7500 3873 7516
3867 7617 3871 7624 3877 7624 3872 7630
3878 7628 3867 7634 3876 7638
$$
GorseThe office that day
Everything else NWS Philadelphia/Mount Holly issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jul 22, 3:48 PM EDT | Severe Thunderstorm Warning | PHI | Sussex | 27 min |
| Jul 21, 10:40 PM EDT | Severe Thunderstorm Warning | PHI | Caroline, Talbot | 36 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; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.