Alert archive / Delaware / Severe Thunderstorm Warnings in 2026
Severe Thunderstorm Warning 230, NWS Philadelphia/Mount Holly
NWS Philadelphia/Mount Holly issued this severe thunderstorm warning at Jul 27, 2026, 3:31 PM EDT for Sussex County, Delaware. It was in force for 44 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 27, 2026, 3:31 PM EDT (19:31 UTC)
- Expired
- Jul 27, 2026, 4:15 PM EDT
- In force
- 44 min
- Issued by
- NWS Philadelphia/Mount Holly
- Area
- Storm-based polygon
- Hail
- 0.75 in
- Wind
- 60.0 mph
County Sussex County, DE
The radar
The Dover AFB radar (KDOX), 37 km from the middle of the area, began a volume at 19:30 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, 7.5 hours before the alert went out and 193 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
- 87 J/kg
- Mixed-layer CIN
- -53 J/kg
- Mixed-layer LCL
- 1233 m above ground
- 0-6 km bulk shear
- 24 kt
- 0-1 km storm-relative helicity
- 5 m²/s²
- 0-3 km storm-relative helicity
- 45 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted.
018
WUUS51 KPHI 271931
SVRPHI
DEC005-272015-
/O.NEW.KPHI.SV.W.0230.260727T1931Z-260727T2015Z/
BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Mount Holly NJ
331 PM EDT Mon Jul 27 2026
The National Weather Service in Mount Holly NJ has issued a
* Severe Thunderstorm Warning for...
Southeastern Sussex County in southern Delaware...
* Until 415 PM EDT.
* At 331 PM EDT, a severe thunderstorm was located near Dagsboro, or
13 miles south of Georgetown, moving northeast at 15 mph.
HAZARD...60 mph wind gusts.
SOURCE...Radar indicated.
IMPACT...Damage to roofs, siding, trees, and power lines is
possible.
* Locations impacted include...
Millsboro, Selbyville, Dagsboro, Millville, Long Neck, and
Frankford.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
For your protection move to an interior room on the lowest floor of a
building.
&&
LAT...LON 3845 7522 3850 7544 3868 7523 3857 7509
TIME...MOT...LOC 1931Z 227DEG 14KT 3851 7530
HAIL THREAT...RADAR INDICATED
MAX HAIL SIZE...<.75 IN
WIND THREAT...RADAR INDICATED
MAX WIND GUST...60 MPH
$$
Guzzo2 follow-up statements
000
WWUS51 KPHI 271948
SVSPHI
Severe Weather Statement
National Weather Service Mount Holly NJ
348 PM EDT Mon Jul 27 2026
DEC005-272015-
/O.CON.KPHI.SV.W.0230.000000T0000Z-260727T2015Z/
Sussex DE-
348 PM EDT Mon Jul 27 2026
...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 415 PM EDT
FOR SOUTHEASTERN SUSSEX COUNTY...
At 348 PM EDT, a severe thunderstorm was located over Dagsboro, or 12
miles southeast of Georgetown, moving northeast at 15 mph.
HAZARD...60 mph wind gusts.
SOURCE...Radar indicated.
IMPACT...Damage to roofs, siding, trees, and power lines is
possible.
Locations impacted include...
Millsboro, Dagsboro, Millville, Long Neck, and Frankford.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
For your protection move to an interior room on the lowest floor of a
building.
&&
LAT...LON 3847 7522 3853 7536 3868 7523 3857 7509
TIME...MOT...LOC 1948Z 226DEG 15KT 3857 7522
HAIL THREAT...RADAR INDICATED
MAX HAIL SIZE...<.75 IN
WIND THREAT...RADAR INDICATED
MAX WIND GUST...60 MPH
$$
Guzzo990 WWUS51 KPHI 272005 SVSPHI Severe Weather Statement National Weather Service Mount Holly NJ 405 PM EDT Mon Jul 27 2026 DEC005-272015- /O.EXP.KPHI.SV.W.0230.000000T0000Z-260727T2015Z/ Sussex DE- 405 PM EDT Mon Jul 27 2026 ...THE SEVERE THUNDERSTORM WARNING FOR SOUTHEASTERN SUSSEX COUNTY WILL EXPIRE AT 415 PM EDT... The storm which prompted the warning has weakened below severe limits, and no longer poses an immediate threat to life or property. Therefore, the warning will be allowed to expire. LAT...LON 3847 7522 3853 7536 3868 7523 3857 7509 TIME...MOT...LOC 2005Z 227DEG 14KT 3861 7517 $$ Guzzo
The office that day
Everything else NWS Philadelphia/Mount Holly issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jul 27, 2:15 PM EDT | Flood Watch | PHI | New Castle | 38 hr |
| Jul 27, 4:14 PM EDT | Severe Thunderstorm Warning | PHI | Kent, Sussex | 46 min |
| Jul 27, 4:56 PM EDT | Severe Thunderstorm Warning | PHI | Kent, Sussex | 20 min |
| Jul 27, 5:22 PM EDT | Flash Flood Warning | PHI | Sussex | 2 hr |
Nearby
Severe Thunderstorm Warnings in Delaware, 2026Every severe thunderstorm 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.