Alert archive / Delaware / Severe Thunderstorm Warnings in 2023
Severe Thunderstorm Warning 333, NWS Philadelphia/Mount Holly
NWS Philadelphia/Mount Holly issued this severe thunderstorm warning at Sep 8, 2023, 3:32 PM EDT for Sussex County, Delaware. It was in force for 43 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
- Sep 8, 2023, 3:32 PM EDT (19:32 UTC)
- Expired
- Sep 8, 2023, 4:15 PM EDT
- In force
- 43 min
- Issued by
- NWS Philadelphia/Mount Holly
- Area
- Storm-based polygon
- Hail
- 0.88 in
- Wind
- 60.0 mph
County Sussex County, DE
The radar
The Dover AFB radar (KDOX), 23 km from the middle of the area, began a volume at 19:33 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 |
|---|---|---|---|
| Sep 8, 3:11 PM EDT | Severe Thunderstorm Watch | SPC | 8 hr |
The nearest sounding before it
Wallops Is Stn, VA (KWAL), launched 12:00Z, 7.5 hours before the alert went out and 80 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
- 2819 J/kg
- Mixed-layer CIN
- -41 J/kg
- Mixed-layer LCL
- 953 m above ground
- 0-6 km bulk shear
- 23 kt
- 0-1 km storm-relative helicity
- 12 m²/s²
- 0-3 km storm-relative helicity
- 50 m²/s²
- Significant tornado parameter
- 0.5
- Supercell composite
- 2.8
The text
As transmitted.
475
WUUS51 KPHI 081932
SVRPHI
DEC005-082015-
/O.NEW.KPHI.SV.W.0333.230908T1932Z-230908T2015Z/
BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Mount Holly NJ
332 PM EDT Fri Sep 8 2023
The National Weather Service in Mount Holly NJ has issued a
* Severe Thunderstorm Warning for...
Central Sussex County in southern Delaware...
* Until 415 PM EDT.
* At 332 PM EDT, a severe thunderstorm was located near Millsboro, or
near Georgetown, moving north at 15 mph.
HAZARD...60 mph wind gusts and nickel size hail.
SOURCE...Radar indicated.
IMPACT...Damage to roofs, siding, trees, and power lines is
possible.
* Locations impacted include...
Georgetown, Millsboro, Lewes, Milton, Dagsboro, Ellendale,
Sycamore, Long Neck and Frankford.
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 3850 7523 3858 7554 3886 7545 3878 7508
TIME...MOT...LOC 1932Z 194DEG 11KT 3862 7536
HAIL THREAT...RADAR INDICATED
MAX HAIL SIZE...0.88 IN
WIND THREAT...RADAR INDICATED
MAX WIND GUST...60 MPH
$$
MLB2 follow-up statements
189
WWUS51 KPHI 081952
SVSPHI
Severe Weather Statement
National Weather Service Mount Holly NJ
352 PM EDT Fri Sep 8 2023
DEC005-082015-
/O.CON.KPHI.SV.W.0333.000000T0000Z-230908T2015Z/
Sussex DE-
352 PM EDT Fri Sep 8 2023
...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 415 PM EDT
FOR CENTRAL SUSSEX COUNTY...
At 351 PM EDT, a severe thunderstorm was located near Georgetown,
moving north at 10 mph.
HAZARD...60 mph wind gusts and nickel size hail.
SOURCE...Radar indicated.
IMPACT...Damage to roofs, siding, trees, and power lines is
possible.
Locations impacted include...
Georgetown, Millsboro, Lewes, Milton, Dagsboro, Ellendale, Sycamore,
Long Neck and Frankford.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
For your protection move to an interior room on the lowest floor of a
building.
Torrential rainfall is occurring with this storm, and may lead to
flash flooding. Do not drive your vehicle through flooded roadways.
&&
LAT...LON 3850 7523 3858 7554 3886 7545 3878 7508
TIME...MOT...LOC 1951Z 192DEG 9KT 3865 7536
HAIL THREAT...RADAR INDICATED
MAX HAIL SIZE...0.88 IN
WIND THREAT...RADAR INDICATED
MAX WIND GUST...60 MPH
$$
MLB593
WWUS51 KPHI 082011
SVSPHI
Severe Weather Statement
National Weather Service Mount Holly NJ
411 PM EDT Fri Sep 8 2023
DEC005-082020-
/O.EXP.KPHI.SV.W.0333.000000T0000Z-230908T2015Z/
Sussex DE-
411 PM EDT Fri Sep 8 2023
...THE SEVERE THUNDERSTORM WARNING FOR CENTRAL SUSSEX COUNTY WILL
EXPIRE AT 415 PM EDT...
The storm which prompted the warning has weakened below severe
limits, and no longer poses an immediate threat to life or property.
Therefore, the warning will be allowed to expire. However gusty
winds and heavy rain are still possible with this thunderstorm.
A Severe Thunderstorm Watch remains in effect until 1100 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 3850 7523 3858 7554 3886 7545 3878 7508
TIME...MOT...LOC 2010Z 194DEG 11KT 3870 7535
$$
MLBThe office that day
Everything else NWS Philadelphia/Mount Holly issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Sep 7, 9:14 PM EDT | Severe Thunderstorm Warning | PHI | Kent | 30 min |
| Sep 8, 1:21 PM EDT | Special Weather Statement | PHI | Sussex | 24 min |
| Sep 8, 1:51 PM EDT | Special Weather Statement | PHI | Sussex | 24 min |
| Sep 8, 2:05 PM EDT | Severe Thunderstorm Warning | PHI | Kent, Sussex | 40 min |
| Sep 8, 2:15 PM EDT | Severe Thunderstorm Warning | PHI | Kent | 45 min |
| Sep 8, 2:46 PM EDT | Special Weather Statement | PHI | Kent | 29 min |
| Sep 8, 2:51 PM EDT | Severe Thunderstorm Warning | PHI | Kent | 39 min |
| Sep 8, 3:27 PM EDT | Special Weather Statement | PHI | Kent, New Castle | 33 min |
| Sep 8, 3:31 PM EDT | Severe Thunderstorm Warning | PHI | Kent, New Castle | 44 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.