Alert archive / Delaware / Severe Thunderstorm Warnings in 2026
Severe Thunderstorm Warning 202, NWS Philadelphia/Mount Holly
NWS Philadelphia/Mount Holly issued this severe thunderstorm warning at Jul 18, 2026, 6:54 PM EDT for Sussex County, Delaware. It was in force for 22 min. 1 report 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 18, 2026, 6:54 PM EDT (22:54 UTC)
- Expired
- Jul 18, 2026, 7:16 PM EDT
- In force
- 22 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), 2 km from the middle of the area, began a volume at 22:56 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 18, 7:00 PM EDT | TSTM WND DMG | 1 Ne Belltown, DE | Social media picture of a large billboard knocked down. |
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 |
|---|---|---|---|
| Jul 18, 1:55 PM EDT | Tornado Watch | SPC | 6 hr |
The nearest sounding before it
Washington/Dulle, VA (KIAD), launched 12:00Z, 10.9 hours before the alert went out and 168 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
- 1396 J/kg
- Mixed-layer CIN
- -112 J/kg
- Mixed-layer LCL
- 936 m above ground
- 0-6 km bulk shear
- 31 kt
- 0-1 km storm-relative helicity
- 126 m²/s²
- 0-3 km storm-relative helicity
- 131 m²/s²
- Significant tornado parameter
- 0.4
- Supercell composite
- 5.1
The text
As transmitted.
841
WUUS51 KPHI 182254
SVRPHI
DEC005-182345-
/O.NEW.KPHI.SV.W.0202.260718T2254Z-260718T2345Z/
BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Mount Holly NJ
654 PM EDT Sat Jul 18 2026
The National Weather Service in Mount Holly NJ has issued a
* Severe Thunderstorm Warning for...
Central Sussex County in southern Delaware...
* Until 745 PM EDT.
* At 653 PM EDT, a severe thunderstorm was located near Bridgeville,
or 8 miles northwest of Georgetown, moving east at 35 mph.
HAZARD...60 mph wind gusts.
SOURCE...Radar indicated.
IMPACT...Damage to roofs, siding, trees, and power lines is
possible.
* Locations impacted include...
Georgetown, Seaford, Lewes, Milton, Bridgeville, Ellendale,
Henlopen Acres, Cape Henlopen State Park, Greenwood, and Dewey
Beach.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
A Tornado Watch remains in effect until 900 PM EDT for central and
southern Delaware.
For your protection move to an interior room on the lowest floor of a
building.
A Tornado Watch remains in effect until 900 PM EDT for central and
southern Delaware.
&&
LAT...LON 3883 7565 3884 7561 3884 7555 3885 7555
3886 7554 3897 7506 3870 7497 3860 7558
TIME...MOT...LOC 2253Z 253DEG 32KT 3874 7553
HAIL THREAT...RADAR INDICATED
MAX HAIL SIZE...<.75 IN
WIND THREAT...RADAR INDICATED
MAX WIND GUST...60 MPH
$$
MPS2 follow-up statements
684
WWUS51 KPHI 182311
SVSPHI
Severe Weather Statement
National Weather Service Mount Holly NJ
711 PM EDT Sat Jul 18 2026
DEC005-182345-
/O.CON.KPHI.SV.W.0202.000000T0000Z-260718T2345Z/
Sussex DE-
711 PM EDT Sat Jul 18 2026
...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 745 PM EDT
FOR NORTHEASTERN SUSSEX COUNTY...
At 710 PM EDT, a severe thunderstorm was located over Milton, or near
Georgetown, moving east at 35 mph.
HAZARD...60 mph wind gusts.
SOURCE...Radar indicated.
IMPACT...Damage to roofs, siding, trees, and power lines is
possible.
Locations impacted include...
Georgetown, Milford, Lewes, Milton, Ellendale, Henlopen Acres, Cape
Henlopen State Park, and Dewey Beach.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
A Tornado Watch remains in effect until 900 PM EDT for southern
Delaware.
For your protection move to an interior room on the lowest floor of a
building.
&&
LAT...LON 3888 7547 3897 7507 3893 7504 3870 7497
3863 7538
TIME...MOT...LOC 2310Z 253DEG 31KT 3878 7535
HAIL THREAT...RADAR INDICATED
MAX HAIL SIZE...<.75 IN
WIND THREAT...RADAR INDICATED
MAX WIND GUST...60 MPH
$$
MPS832
WWUS51 KPHI 182316 RRA
SVSPHI
Severe Weather Statement
National Weather Service Mount Holly NJ
716 PM EDT Sat Jul 18 2026
DEC005-182326-
/O.CAN.KPHI.SV.W.0202.000000T0000Z-260718T2345Z/
Sussex DE-
716 PM EDT Sat Jul 18 2026
...THE SEVERE THUNDERSTORM WARNING FOR NORTHEASTERN SUSSEX COUNTY IS
CANCELLED...
The storm which prompted the warning has moved out of the area.
Therefore, the warning has been cancelled.
A Tornado Watch remains in effect until 900 PM EDT for southern
Delaware.
To report severe weather, contact your nearest law enforcement
agency. They will relay your report to the National Weather Service
Mount Holly NJ.
LAT...LON 3888 7547 3897 7507 3893 7504 3870 7497
3863 7538
TIME...MOT...LOC 2315Z 253DEG 32KT 3880 7528
$$
MPSThe office that day
Everything else NWS Philadelphia/Mount Holly issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jul 18, 2:12 AM EDT | Heat Advisory | PHI | Sussex | 17 hr |
| Jul 18, 5:14 PM EDT | Severe Thunderstorm Warning | PHI | Kent, New Castle | 61 min |
| Jul 18, 5:26 PM EDT | Severe Thunderstorm Warning | PHI | Kent, Sussex | 49 min |
| Jul 18, 6:16 PM EDT | Severe Thunderstorm Warning | PHI | Sussex | 44 min |
| Jul 18, 6:27 PM EDT | Tornado Warning | PHI | Sussex | 33 min |
| Jul 18, 6:40 PM EDT | Severe Thunderstorm Warning | PHI | Kent, Sussex | 36 min |
| Jul 18, 7:09 PM EDT | Severe Thunderstorm Warning | PHI | Sussex | 8 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.