Alert archive / Delaware / Severe Thunderstorm Warnings in 2026
Severe Thunderstorm Warning 201, NWS Philadelphia/Mount Holly
NWS Philadelphia/Mount Holly issued this severe thunderstorm warning at Jul 18, 2026, 6:40 PM EDT for Caroline County, Maryland; Kent County, Sussex County, Delaware. It was in force for 36 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 18, 2026, 6:40 PM EDT (22:40 UTC)
- Expired
- Jul 18, 2026, 7:16 PM EDT
- In force
- 36 min
- Issued by
- NWS Philadelphia/Mount Holly
- Area
- Storm-based polygon
- Damage threat
- Considerable
- Hail
- 0.75 in
- Wind
- 70.0 mph
Counties Kent County, DE, Sussex County, DE, Caroline County, MD
The radar
The Dover AFB radar (KDOX), 27 km from the middle of the area, began a volume at 22:42 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 18, 1:55 PM EDT | Tornado Watch | SPC | 6 hr |
The nearest sounding before it
Washington/Dulle, VA (KIAD), launched 12:00Z, 10.7 hours before the alert went out and 147 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.
906
WUUS51 KPHI 182240
SVRPHI
DEC001-005-MDC011-182330-
/O.NEW.KPHI.SV.W.0201.260718T2240Z-260718T2330Z/
BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Mount Holly NJ
640 PM EDT Sat Jul 18 2026
The National Weather Service in Mount Holly NJ has issued a
* Severe Thunderstorm Warning for...
Northwestern Sussex County in southern Delaware...
Southwestern Kent County in central Delaware...
Southeastern Caroline County in eastern Maryland...
* Until 730 PM EDT.
* At 640 PM EDT, a severe thunderstorm was located over Federalsburg,
or 8 miles northeast of Hurlock, moving northeast at 25 mph.
HAZARD...70 mph wind gusts.
SOURCE...Radar indicated.
IMPACT...Expect considerable tree damage. Damage is likely to
mobile homes, roofs, and outbuildings.
* Locations impacted include...
Milford, Seaford, Harrington, Federalsburg, Bridgeville, Ellendale,
Smithville, Agner, Andrewsville, Felton, Greenwood, Houston,
Farmington, and Riverview.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
A Tornado Watch remains in effect until 900 PM EDT for central and
southern Delaware...and eastern Maryland.
For your protection move to an interior room on the lowest floor of a
building.
To report severe weather, contact your nearest law enforcement
agency. They will send your report to the National Weather Service
office in Mount Holly NJ.
Torrential rainfall is occurring with this storm, and may lead to
flash flooding. Do not drive your vehicle through flooded roadways.
A Tornado Watch remains in effect until 900 PM EDT for central and
southern Delaware...and eastern Maryland.
&&
LAT...LON 3865 7571 3869 7577 3868 7580 3870 7580
3871 7584 3870 7586 3873 7589 3905 7555
3885 7532 3861 7570
TIME...MOT...LOC 2240Z 227DEG 23KT 3872 7575
THUNDERSTORM DAMAGE THREAT...CONSIDERABLE
HAIL THREAT...RADAR INDICATED
MAX HAIL SIZE...<.75 IN
WIND THREAT...RADAR INDICATED
MAX WIND GUST...70 MPH
$$
MPS2 follow-up statements
872
WWUS51 KPHI 182255
SVSPHI
Severe Weather Statement
National Weather Service Mount Holly NJ
655 PM EDT Sat Jul 18 2026
MDC011-182305-
/O.CAN.KPHI.SV.W.0201.000000T0000Z-260718T2330Z/
Caroline MD-
655 PM EDT Sat Jul 18 2026
...THE SEVERE THUNDERSTORM WARNING FOR SOUTHEASTERN CAROLINE COUNTY
IS CANCELLED...
The severe thunderstorm which prompted the warning has moved out of
the warned area. Therefore, the warning has been cancelled.
A Tornado Watch remains in effect until 900 PM EDT for central and
southern Delaware...and eastern Maryland.
LAT...LON 3866 7571 3886 7572 3890 7537 3885 7532
3865 7565
TIME...MOT...LOC 2255Z 268DEG 22KT 3876 7563
$$
DEC001-005-182330-
/O.CON.KPHI.SV.W.0201.000000T0000Z-260718T2330Z/
Sussex DE-Kent DE-
655 PM EDT Sat Jul 18 2026
...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 730 PM EDT
FOR NORTHWESTERN SUSSEX AND SOUTH CENTRAL KENT COUNTIES...
At 655 PM EDT, a severe thunderstorm was located over Bridgeville, or
13 miles west of Georgetown, moving east at 25 mph.
HAZARD...70 mph wind gusts.
SOURCE...Radar indicated.
IMPACT...Expect considerable tree damage. Damage is likely to mobile
homes, roofs, and outbuildings.
Locations impacted include...
Milford, Bridgeville, Ellendale, Andrewsville, Greenwood, and
Farmington.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
A Tornado Watch remains in effect until 900 PM EDT for central and
southern Delaware...and eastern Maryland.
For your protection move to an interior room on the lowest floor of a
building.
To report severe weather contact your nearest law enforcement agency.
They will send your report to the National Weather Service office in
Mount Holly NJ.
Torrential rainfall is occurring with this storm, and may lead to
flash flooding. Do not drive your vehicle through flooded roadways.
&&
LAT...LON 3866 7571 3886 7572 3890 7537 3885 7532
3865 7565
TIME...MOT...LOC 2255Z 268DEG 22KT 3876 7563
THUNDERSTORM DAMAGE THREAT...CONSIDERABLE
HAIL THREAT...RADAR INDICATED
MAX HAIL SIZE...<.75 IN
WIND THREAT...RADAR INDICATED
MAX WIND GUST...70 MPH
$$
MPS949
WWUS51 KPHI 182316
SVSPHI
Severe Weather Statement
National Weather Service Mount Holly NJ
716 PM EDT Sat Jul 18 2026
DEC001-005-182326-
/O.CAN.KPHI.SV.W.0201.000000T0000Z-260718T2330Z/
Sussex DE-Kent DE-
716 PM EDT Sat Jul 18 2026
...THE SEVERE THUNDERSTORM WARNING FOR NORTHWESTERN SUSSEX AND SOUTH
CENTRAL KENT COUNTIES IS CANCELLED...
The storm which prompted the warning has moved out of the area.
Therefore, the warning has been cancelled.
A Tornado Watch remains in effect until 900 PM EDT for central and
southern Delaware...and eastern Maryland.
To report severe weather, contact your nearest law enforcement
agency. They will relay your report to the National Weather Service
Mount Holly NJ.
LAT...LON 3866 7571 3886 7572 3890 7537 3885 7532
3865 7565
TIME...MOT...LOC 2309Z 227DEG 23KT 3885 7550
$$
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 | Caroline, Queen Anne's, Talbot | 17 hr |
| Jul 18, 5:39 AM EDT | Flash Flood Warning | PHI | Caroline, Queen Anne's, Talbot | 62 min |
| Jul 18, 6:09 AM EDT | Flash Flood Warning | PHI | Kent, Queen Anne's | 55 min |
| Jul 18, 4:13 PM EDT | Severe Thunderstorm Warning | PHI | Kent, Queen Anne's | 62 min |
| Jul 18, 5:05 PM EDT | Severe Thunderstorm Warning | PHI | Caroline, Talbot | 40 min |
| Jul 18, 5:14 PM EDT | Severe Thunderstorm Warning | PHI | Caroline, Kent, Queen Anne's, Talbot | 61 min |
| Jul 18, 5:26 PM EDT | Severe Thunderstorm Warning | PHI | Caroline, Queen Anne's, Talbot | 49 min |
| Jul 18, 5:53 PM EDT | Severe Thunderstorm Warning | PHI | Caroline, Queen Anne's, Talbot | 52 min |
| Jul 18, 6:24 PM EDT | Severe Thunderstorm Warning | PHI | Caroline, Talbot | 20 min |
| Jul 18, 6:25 PM EDT | Flash Flood Warning | PHI | Caroline, Talbot | 4 hr |
| Jul 18, 6:27 PM EDT | Tornado Warning | PHI | Caroline | 33 min |
| Jul 18, 6:16 PM EDT | Severe Thunderstorm Warning | PHI | Sussex | 44 min |
| Jul 18, 6:54 PM EDT | Severe Thunderstorm Warning | PHI | Sussex | 22 min |
| Jul 18, 7:09 PM EDT | Severe Thunderstorm Warning | PHI | Sussex | 8 min |
Nearby
Severe Thunderstorm Warnings in Delaware, 2026Severe Thunderstorm Warnings in Maryland, 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.