Alert archive / Delaware / Severe Thunderstorm Warnings in 2026
Severe Thunderstorm Warning 218, NWS Philadelphia/Mount Holly
NWS Philadelphia/Mount Holly issued this severe thunderstorm warning at Jul 21, 2026, 5:42 PM EDT for Kent County, Delaware. It was in force for 48 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 21, 2026, 5:42 PM EDT (21:42 UTC)
- Expired
- Jul 21, 2026, 6:30 PM EDT
- In force
- 48 min
- Issued by
- NWS Philadelphia/Mount Holly
- Area
- Storm-based polygon
- Damage threat
- Considerable
- Hail
- 0.88 in
- Wind
- 70.0 mph
County Kent County, DE
The radar
The Dover AFB radar (KDOX), 23 km from the middle of the area, began a volume at 21:43 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 21, 2:46 PM EDT | Severe Thunderstorm Watch | SPC | 11 hr |
The nearest sounding before it
Washington/Dulle, VA (KIAD), launched 12:00Z, 9.7 hours before the alert went out and 164 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
- 941 J/kg
- Mixed-layer CIN
- -113 J/kg
- Mixed-layer LCL
- 772 m above ground
- 0-6 km bulk shear
- 35 kt
- 0-1 km storm-relative helicity
- 68 m²/s²
- 0-3 km storm-relative helicity
- 112 m²/s²
- Significant tornado parameter
- 0.2
- Supercell composite
- 0.9
The text
As transmitted.
948
WUUS51 KPHI 212142
SVRPHI
DEC001-212230-
/O.NEW.KPHI.SV.W.0218.260721T2142Z-260721T2230Z/
BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Mount Holly NJ
542 PM EDT Tue Jul 21 2026
The National Weather Service in Mount Holly NJ has issued a
* Severe Thunderstorm Warning for...
East central Kent County in central Delaware...
* Until 630 PM EDT.
* At 541 PM EDT, a severe thunderstorm was located over Bowers, or 10
miles southeast of Dover, moving east at 20 mph.
HAZARD...70 mph wind gusts and nickel size hail.
SOURCE...Radar indicated.
IMPACT...Expect considerable tree damage. Damage is likely to
mobile homes, roofs, and outbuildings.
* Locations impacted include...
Dover, Bowers, Big Stone Beach, Rising Sun-Lebanon, Felton,
Frederica, Magnolia, Riverview, and Woodside East.
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 3897 7561 3902 7560 3903 7553 3909 7552
3913 7539 3896 7529
TIME...MOT...LOC 2141Z 270DEG 20KT 3903 7541
THUNDERSTORM DAMAGE THREAT...CONSIDERABLE
HAIL THREAT...RADAR INDICATED
MAX HAIL SIZE...0.88 IN
WIND THREAT...RADAR INDICATED
MAX WIND GUST...70 MPH
$$
AKL2 follow-up statements
069
WWUS51 KPHI 212213
SVSPHI
Severe Weather Statement
National Weather Service Mount Holly NJ
613 PM EDT Tue Jul 21 2026
DEC001-212230-
/O.CON.KPHI.SV.W.0218.000000T0000Z-260721T2230Z/
Kent DE-
613 PM EDT Tue Jul 21 2026
...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 630 PM EDT
FOR EAST CENTRAL KENT COUNTY...
At 613 PM EDT, a severe thunderstorm was located over Bowers, or 12
miles southeast of Dover, moving east at 15 mph.
HAZARD...60 mph wind gusts.
SOURCE...Radar indicated.
IMPACT...Damage to roofs, siding, trees, and power lines is
possible.
Locations impacted include...
Dover and Bowers.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
For your protection move to an interior room on the lowest floor of a
building.
&&
LAT...LON 3904 7546 3911 7546 3913 7539 3908 7536
3904 7533 3901 7533
TIME...MOT...LOC 2213Z 271DEG 13KT 3904 7536
HAIL THREAT...RADAR INDICATED
MAX HAIL SIZE...<.75 IN
WIND THREAT...RADAR INDICATED
MAX WIND GUST...60 MPH
$$
AKL940
WWUS51 KPHI 212220
SVSPHI
Severe Weather Statement
National Weather Service Mount Holly NJ
620 PM EDT Tue Jul 21 2026
DEC001-212230-
/O.EXP.KPHI.SV.W.0218.000000T0000Z-260721T2230Z/
Kent DE-
620 PM EDT Tue Jul 21 2026
...THE SEVERE THUNDERSTORM WARNING FOR EAST CENTRAL KENT COUNTY WILL
EXPIRE AT 630 PM EDT...
The storm which prompted the warning has moved out of the area.
Therefore, the warning will be allowed to expire.
A Severe Thunderstorm Watch remains in effect until 1000 PM EDT for
central Delaware.
LAT...LON 3904 7546 3911 7546 3913 7539 3908 7536
3904 7533 3901 7533
TIME...MOT...LOC 2220Z 270DEG 20KT 3904 7533
$$
AKLThe office that day
Everything else NWS Philadelphia/Mount Holly issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jul 21, 3:58 PM EDT | Severe Thunderstorm Warning | PHI | New Castle | 47 min |
| Jul 21, 4:38 PM EDT | Flash Flood Warning | PHI | New Castle | 4 hr |
| Jul 21, 4:43 PM EDT | Severe Thunderstorm Warning | PHI | New Castle | 47 min |
| Jul 21, 5:06 PM EDT | Severe Thunderstorm Warning | PHI | Kent | 39 min |
| Jul 21, 5:30 PM EDT | Severe Thunderstorm Warning | PHI | New Castle | 45 min |
| Jul 21, 6:00 PM EDT | Severe Thunderstorm Warning | PHI | Kent, New Castle | 45 min |
| Jul 21, 6:53 PM EDT | Flash Flood Warning | PHI | Kent, New Castle | 3 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.