Alert archive / Delaware / Severe Thunderstorm Warnings in 2026
Severe Thunderstorm Warning 372, NWS Philadelphia/Mount Holly
NWS Philadelphia/Mount Holly issued this severe thunderstorm warning at Sep 4, 2026, 1:35 AM EDT for Sussex County, Delaware. It was in force for 25 min. 6 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
- Sep 4, 2026, 1:35 AM EDT (05:35 UTC)
- Expired
- Sep 4, 2026, 2:00 AM EDT
- In force
- 25 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), 11 km from the middle of the area, began a volume at 05:36 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 |
|---|---|---|---|
| Sep 4, 1:48 AM EDT | TSTM WND DMG | 4 Wnw Millville, DE | Wires down around Falling Point Road near Long Neck. Time estimated from radar. |
| Sep 4, 1:52 AM EDT | MARINE TSTM WIND 63 | 1 S Indian Beach, DE | Dewey Beach Mesonet. |
| Sep 4, 1:54 AM EDT | TSTM WND GST 57 | 2 Wnw Lewes, DE | Mesonet station XLEW Lewes. |
| Sep 4, 1:54 AM EDT | MARINE TSTM WIND 54 | 1 Ene Lewes, DE | Buoy station LWSD1 Lewes NOS. |
| Sep 4, 1:54 AM EDT | MARINE TSTM WIND 57 | 2 Wnw Lewes, DE | Mesonet station XLEW Lewes. |
| Sep 4, 1:55 AM EDT | TSTM WND GST 64 | Lewes, DE | Lewes Ferry Mesonet. |
Local storm reports filed while the alert was in force, from inside its polygon or its counties.
The watch it was issued in
The SPC watch in force over the same counties when this warning went out.
| Issued | Product | Office | Lasted |
|---|---|---|---|
| Sep 3, 8:38 PM EDT | Severe Thunderstorm Watch | SPC | 5 hr |
The nearest sounding before it
Washington/Dulle, VA (KIAD), launched 00:00Z, 5.6 hours before the alert went out and 181 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
- 2290 J/kg
- Mixed-layer CIN
- -59 J/kg
- Mixed-layer LCL
- 1425 m above ground
- 0-6 km bulk shear
- 22 kt
- 0-1 km storm-relative helicity
- 92 m²/s²
- 0-3 km storm-relative helicity
- 80 m²/s²
- Significant tornado parameter
- 0.5
- Supercell composite
- 8.7
The text
As transmitted.
374
WUUS51 KPHI 040535
SVRPHI
DEC005-040600-
/O.NEW.KPHI.SV.W.0372.260904T0535Z-260904T0600Z/
BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Mount Holly NJ
135 AM EDT Fri Sep 4 2026
The National Weather Service in Mount Holly NJ has issued a
* Severe Thunderstorm Warning for...
Central Sussex County in southern Delaware...
* Until 200 AM EDT.
* At 135 AM EDT, a severe thunderstorm was located near Milton, or
near Georgetown, moving east at 45 mph.
HAZARD...60 mph wind gusts.
SOURCE...Radar indicated.
IMPACT...Damage to roofs, siding, trees, and power lines is
possible.
* Locations impacted include...
Georgetown, Milford, Millsboro, Lewes, Milton, Millville,
Ellendale, Henlopen Acres, Cape Henlopen State Park, Long Neck,
Ocean View, South Bethany, and Dewey Beach.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
For your protection move to an interior room on the lowest floor of a
building.
&&
LAT...LON 3865 7554 3886 7553 3890 7549 3892 7541
3896 7539 3894 7524 3882 7515 3883 7508
3881 7506 3849 7502
TIME...MOT...LOC 0535Z 283DEG 38KT 3872 7531
HAIL THREAT...RADAR INDICATED
MAX HAIL SIZE...<.75 IN
WIND THREAT...RADAR INDICATED
MAX WIND GUST...60 MPH
$$
Hoeflich2 follow-up statements
258
WWUS51 KPHI 040545
SVSPHI
Severe Weather Statement
National Weather Service Mount Holly NJ
145 AM EDT Fri Sep 4 2026
DEC005-040600-
/O.CON.KPHI.SV.W.0372.000000T0000Z-260904T0600Z/
Sussex DE-
145 AM EDT Fri Sep 4 2026
...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 200 AM EDT
FOR EASTERN SUSSEX COUNTY...
At 145 AM EDT, a severe thunderstorm was located near Henlopen Acres,
or 11 miles east of Georgetown, moving east at 45 mph.
HAZARD...60 mph wind gusts.
SOURCE...Radar indicated.
IMPACT...Damage to roofs, siding, trees, and power lines is
possible.
Locations impacted include...
Millsboro, Lewes, Milton, Millville, Henlopen Acres, Cape Henlopen
State Park, Long Neck, Ocean View, South Bethany, and Dewey Beach.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
For your protection move to an interior room on the lowest floor of a
building.
&&
LAT...LON 3859 7533 3895 7538 3894 7525 3882 7515
3883 7508 3881 7506 3849 7502
TIME...MOT...LOC 0545Z 283DEG 38KT 3870 7517
HAIL THREAT...RADAR INDICATED
MAX HAIL SIZE...<.75 IN
WIND THREAT...RADAR INDICATED
MAX WIND GUST...60 MPH
$$
Hoeflich861
WWUS51 KPHI 040559
SVSPHI
Severe Weather Statement
National Weather Service Mount Holly NJ
159 AM EDT Fri Sep 4 2026
DEC005-040609-
/O.EXP.KPHI.SV.W.0372.000000T0000Z-260904T0600Z/
Sussex DE-
159 AM EDT Fri Sep 4 2026
...THE SEVERE THUNDERSTORM WARNING FOR EASTERN SUSSEX COUNTY WILL
EXPIRE AT 200 AM EDT...
The storm which prompted the warning has moved out of the area.
Therefore, the warning will be allowed to expire.
LAT...LON 3859 7533 3895 7538 3894 7525 3882 7515
3883 7508 3881 7506 3849 7502
TIME...MOT...LOC 0559Z 283DEG 38KT 3868 7505
$$
HoeflichThe office that day
Everything else NWS Philadelphia/Mount Holly issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Sep 4, 12:52 AM EDT | Severe Thunderstorm Warning | PHI | Kent, Sussex | 53 min |
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; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.