Alert archive / Delaware / Severe Thunderstorm Warnings in 2026
Severe Thunderstorm Warning 166, NWS Philadelphia/Mount Holly
NWS Philadelphia/Mount Holly issued this severe thunderstorm warning at Jul 9, 2026, 7:52 PM EDT for Sussex County, Delaware. It was in force for 53 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 9, 2026, 7:52 PM EDT (23:52 UTC)
- Expired
- Jul 9, 2026, 8:45 PM EDT
- In force
- 53 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 23:51 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 watch it was issued in
The SPC watch in force over the same counties when this warning went out.
| Issued | Product | Office | Lasted |
|---|---|---|---|
| Jul 9, 2:30 PM EDT | Severe Thunderstorm Watch | SPC | 7 hr |
The nearest sounding before it
Washington/Dulle, VA (KIAD), launched 12:00Z, 11.9 hours before the alert went out and 166 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
- 1170 J/kg
- Mixed-layer CIN
- -24 J/kg
- Mixed-layer LCL
- 543 m above ground
- 0-6 km bulk shear
- 23 kt
- 0-1 km storm-relative helicity
- 39 m²/s²
- 0-3 km storm-relative helicity
- 49 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.8
The text
As transmitted.
213
WUUS51 KPHI 092352
SVRPHI
DEC005-100045-
/O.NEW.KPHI.SV.W.0166.260709T2352Z-260710T0045Z/
BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Mount Holly NJ
752 PM EDT Thu Jul 9 2026
The National Weather Service in Mount Holly NJ has issued a
* Severe Thunderstorm Warning for...
Southwestern Sussex County in southern Delaware...
* Until 845 PM EDT.
* At 751 PM EDT, a severe thunderstorm was located over Vienna, or 9
miles south of Hurlock, moving east at 30 mph.
HAZARD...60 mph wind gusts.
SOURCE...Radar indicated.
IMPACT...Damage to roofs, siding, trees, and power lines is
possible.
* Locations impacted include...
Laurel, Delmar, Sycamore, Gumboro, and Bethel.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
For your protection move to an interior room on the lowest floor of a
building.
Torrential rainfall is occurring with this storm, and may lead to
flash flooding. Do not drive your vehicle through flooded roadways.
&&
LAT...LON 3846 7569 3849 7570 3859 7571 3862 7535
3845 7526
TIME...MOT...LOC 2351Z 265DEG 25KT 3849 7585
HAIL THREAT...RADAR INDICATED
MAX HAIL SIZE...<.75 IN
WIND THREAT...RADAR INDICATED
MAX WIND GUST...60 MPH
$$
MJL2 follow-up statements
965
WWUS51 KPHI 100032
SVSPHI
Severe Weather Statement
National Weather Service Mount Holly NJ
832 PM EDT Thu Jul 9 2026
DEC005-100045-
/O.CON.KPHI.SV.W.0166.000000T0000Z-260710T0045Z/
Sussex DE-
832 PM EDT Thu Jul 9 2026
...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 845 PM EDT
FOR SOUTH CENTRAL SUSSEX COUNTY...
At 832 PM EDT, a severe thunderstorm was located near Sycamore, or 11
miles northeast of Salisbury, moving east at 30 mph.
HAZARD...60 mph wind gusts.
SOURCE...Radar indicated.
IMPACT...Damage to roofs, siding, trees, and power lines is
possible.
Locations impacted include...
Sycamore and Gumboro.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
For your protection move to an interior room on the lowest floor of a
building.
Torrential rainfall is occurring with this storm, and may lead to
flash flooding. Do not drive your vehicle through flooded roadways.
&&
LAT...LON 3846 7555 3851 7554 3860 7556 3862 7535
3845 7526
TIME...MOT...LOC 0032Z 265DEG 25KT 3851 7548
HAIL THREAT...RADAR INDICATED
MAX HAIL SIZE...<.75 IN
WIND THREAT...RADAR INDICATED
MAX WIND GUST...60 MPH
$$
MJL067
WWUS51 KPHI 100036
SVSPHI
Severe Weather Statement
National Weather Service Mount Holly NJ
836 PM EDT Thu Jul 9 2026
DEC005-100046-
/O.EXP.KPHI.SV.W.0166.000000T0000Z-260710T0045Z/
Sussex DE-
836 PM EDT Thu Jul 9 2026
...THE SEVERE THUNDERSTORM WARNING FOR SOUTH CENTRAL SUSSEX COUNTY
WILL EXPIRE AT 845 PM EDT...
The storm which prompted the warning has weakened below severe
limits, and has exited the warned area. Therefore, the warning will
be allowed to expire. However heavy rain is still possible with this
thunderstorm.
A Severe Thunderstorm Watch remains in effect until 1000 PM EDT for
southern Delaware.
LAT...LON 3846 7555 3851 7554 3860 7556 3862 7535
3845 7526
TIME...MOT...LOC 0036Z 265DEG 25KT 3851 7547
$$
MJLThe office that day
Everything else NWS Philadelphia/Mount Holly issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jul 9, 2:09 AM EDT | Flood Watch | PHI | New Castle | 19 hr |
| Jul 9, 1:37 PM EDT | Flash Flood Warning | PHI | New Castle | 6 hr |
| Jul 9, 4:30 PM EDT | Flash Flood Warning | PHI | New Castle | 4 hr |
| Jul 9, 5:30 PM EDT | Severe Thunderstorm Warning | PHI | New Castle | 45 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; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.