Alert archive / Delaware / Severe Thunderstorm Warnings in 2023
Severe Thunderstorm Warning 238, NWS Philadelphia/Mount Holly
NWS Philadelphia/Mount Holly issued this severe thunderstorm warning at Jul 25, 2023, 4:01 PM EDT for Sussex County, Delaware. It was in force for 44 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 25, 2023, 4:01 PM EDT (20:01 UTC)
- Expired
- Jul 25, 2023, 4:45 PM EDT
- In force
- 44 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), 27 km from the middle of the area, began a volume at 20:04 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 25, 12:13 PM EDT | Severe Thunderstorm Watch | SPC | 10 hr |
The nearest sounding before it
Wallops Is Stn, VA (KWAL), launched 12:00Z, 8.0 hours before the alert went out and 94 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
- 579 J/kg
- Mixed-layer CIN
- -37 J/kg
- Mixed-layer LCL
- 737 m above ground
- 0-6 km bulk shear
- 27 kt
- 0-1 km storm-relative helicity
- -1 m²/s²
- 0-3 km storm-relative helicity
- 22 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.1
The text
As transmitted.
454
WUUS51 KPHI 252001
SVRPHI
DEC005-252045-
/O.NEW.KPHI.SV.W.0238.230725T2001Z-230725T2045Z/
BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Mount Holly NJ
401 PM EDT Tue Jul 25 2023
The National Weather Service in Mount Holly NJ has issued a
* Severe Thunderstorm Warning for...
Central Sussex County in southern Delaware...
* Until 445 PM EDT.
* At 400 PM EDT, severe thunderstorms were located along a line
extending from Lewes to near Georgetown to near Seaford, 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...
Georgetown, Millsboro, Lewes, Milton, Bridgeville, 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 3873 7565 3881 7542 3893 7529 3883 7476
3878 7479 3877 7486 3871 7486 3848 7505
TIME...MOT...LOC 2000Z 278DEG 24KT 3880 7513 3870 7531 3867 7553
HAIL THREAT...RADAR INDICATED
MAX HAIL SIZE...<.75 IN
WIND THREAT...RADAR INDICATED
MAX WIND GUST...60 MPH
$$
MLB3 follow-up statements
657
WWUS51 KPHI 252019
SVSPHI
Severe Weather Statement
National Weather Service Mount Holly NJ
419 PM EDT Tue Jul 25 2023
DEC005-252045-
/O.CON.KPHI.SV.W.0238.000000T0000Z-230725T2045Z/
Sussex DE-
419 PM EDT Tue Jul 25 2023
...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 445 PM EDT
FOR SOUTHEASTERN SUSSEX COUNTY...
At 418 PM EDT, severe thunderstorms were located along a line
extending from 6 miles east of Cape Henlopen State Park to near
Henlopen Acres to near Georgetown, moving east at 30 mph.
HAZARD...60 mph wind gusts.
SOURCE...Radar indicated.
IMPACT...Damage to roofs, siding, trees, and power lines is
possible.
Locations impacted include...
Georgetown, Millsboro, Lewes, Millville, Henlopen Acres, Cape
Henlopen State Park, Long Neck, Ocean View, South Bethany and Dewey
Beach.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
For your protection move to an interior room on the lowest floor of a
building.
&&
LAT...LON 3866 7541 3887 7515 3883 7476 3878 7479
3877 7486 3871 7486 3848 7505
TIME...MOT...LOC 2018Z 278DEG 24KT 3878 7498 3868 7516 3865 7538
HAIL THREAT...RADAR INDICATED
MAX HAIL SIZE...<.75 IN
WIND THREAT...RADAR INDICATED
MAX WIND GUST...60 MPH
$$
MLB058
WWUS51 KPHI 252034
SVSPHI
Severe Weather Statement
National Weather Service Mount Holly NJ
434 PM EDT Tue Jul 25 2023
DEC005-252045-
/O.CON.KPHI.SV.W.0238.000000T0000Z-230725T2045Z/
Sussex DE-
434 PM EDT Tue Jul 25 2023
...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 445 PM EDT
FOR SOUTHEASTERN SUSSEX COUNTY...
At 434 PM EDT, severe thunderstorms were located along a line
extending from 12 miles south of Cape May to near Henlopen Acres to
near Millsboro, 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...
Lewes, 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 3863 7534 3885 7514 3883 7476 3878 7479
3877 7486 3871 7486 3848 7505
TIME...MOT...LOC 2034Z 278DEG 24KT 3877 7485 3867 7503 3864 7525
HAIL THREAT...RADAR INDICATED
MAX HAIL SIZE...<.75 IN
WIND THREAT...RADAR INDICATED
MAX WIND GUST...60 MPH
$$
MLB917
WWUS51 KPHI 252044
SVSPHI
Severe Weather Statement
National Weather Service Mount Holly NJ
444 PM EDT Tue Jul 25 2023
DEC005-252054-
/O.EXP.KPHI.SV.W.0238.000000T0000Z-230725T2045Z/
Sussex DE-
444 PM EDT Tue Jul 25 2023
...THE SEVERE THUNDERSTORM WARNING FOR SOUTHEASTERN SUSSEX COUNTY
WILL EXPIRE AT 445 PM EDT...
The storms which prompted the warning have moved out of the area.
Therefore, the warning will be allowed to expire.
A Severe Thunderstorm Watch remains in effect until 800 PM EDT for
southern Delaware.
To report severe weather, contact your nearest law enforcement
agency. They will relay your report to the National Weather Service
Mount Holly NJ.
LAT...LON 3863 7534 3885 7514 3883 7476 3878 7479
3877 7486 3871 7486 3848 7505
TIME...MOT...LOC 2044Z 278DEG 24KT 3876 7477 3866 7495 3863 7517
$$
MLBThe office that day
Everything else NWS Philadelphia/Mount Holly issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jul 25, 12:26 PM EDT | Special Weather Statement | PHI | Kent | 34 min |
| Jul 25, 12:52 PM EDT | Special Weather Statement | PHI | New Castle | 23 min |
| Jul 25, 1:34 PM EDT | Special Weather Statement | PHI | Kent | 26 min |
| Jul 25, 1:38 PM EDT | Flash Flood Warning | PHI | New Castle | 4 hr |
| Jul 25, 2:51 PM EDT | Severe Thunderstorm Warning | PHI | Kent, Sussex | 39 min |
| Jul 25, 3:21 PM EDT | Severe Thunderstorm Warning | PHI | New Castle | 39 min |
| Jul 25, 3:21 PM EDT | Severe Thunderstorm Warning | PHI | Kent, Sussex | 39 min |
| Jul 25, 3:58 PM EDT | Severe Thunderstorm Warning | PHI | New Castle | 30 min |
Nearby
Severe Thunderstorm Warnings in Delaware, 2023Every severe thunderstorm warning in 2023
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.