Alert archive / Maryland / Severe Thunderstorm Warnings in 2023
Severe Thunderstorm Warning 320, NWS Philadelphia/Mount Holly
NWS Philadelphia/Mount Holly issued this severe thunderstorm warning at Sep 7, 2023, 9:14 PM EDT for Kent County, Delaware; Caroline County, Queen Anne's County, Maryland. It was in force for 30 min. 4 reports 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
- Sep 7, 2023, 9:14 PM EDT (01:14 UTC)
- Expired
- Sep 7, 2023, 9:44 PM EDT
- In force
- 30 min
- Issued by
- NWS Philadelphia/Mount Holly
- Area
- Storm-based polygon
- Hail
- 1.0 in
- Wind
- 60.0 mph
Counties Kent County, DE, Caroline County, MD, Queen Anne's County, MD
The radar
The Dover AFB radar (KDOX), 35 km from the middle of the area, began a volume at 01:14 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 |
|---|---|---|---|
| Sep 7, 9:16 PM EDT | TSTM WND DMG | 1 Sse Marydel, DE | The tops of some trees snapped off. Time estimated from radar. |
| Sep 7, 9:16 PM EDT | TSTM WND DMG | 2 Sse Hartly, DE | DE State Police reports trees down in the area of Route 8 blocking the roadway in Hartly. Time estimated from radar. |
| Sep 7, 9:35 PM EDT | TSTM WND GST 41 | 1 Wsw Cheswold, DE | K33N measured gust. |
| Sep 7, 9:44 PM EDT | TSTM WND GST 40 | Dover Air Force Base, DE | KDOV measured gust. |
Local storm reports filed while the alert was in force, from inside its polygon or its counties.
The nearest sounding before it
Wallops Is Stn, VA (KWAL), launched 00:00Z, 1.2 hours before the alert went out and 132 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
- 2650 J/kg
- Mixed-layer CIN
- -56 J/kg
- Mixed-layer LCL
- 1291 m above ground
- 0-6 km bulk shear
- 17 kt
- 0-1 km storm-relative helicity
- 45 m²/s²
- 0-3 km storm-relative helicity
- 30 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted.
349
WUUS51 KPHI 080114
SVRPHI
DEC001-MDC011-035-080200-
/O.NEW.KPHI.SV.W.0320.230908T0114Z-230908T0200Z/
BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Mount Holly NJ
914 PM EDT Thu Sep 7 2023
The National Weather Service in Mount Holly NJ has issued a
* Severe Thunderstorm Warning for...
Northern Kent County in central Delaware...
East central Queen Anne's County in northeastern Maryland...
Northeastern Caroline County in eastern Maryland...
* Until 1000 PM EDT.
* At 913 PM EDT, a severe thunderstorm was located near Sandtown, or
12 miles west of Dover, moving northeast at 15 mph.
HAZARD...60 mph wind gusts and quarter size hail.
SOURCE...Radar indicated.
IMPACT...Minor damage to vehicles is possible. Wind damage to
roofs, siding, trees, and power lines is possible.
* Locations impacted include...
Dover, Smyrna, Camden, Cheswold, Goldsboro, Woodside, Viola,
Hartly, Rising Sun-Lebanon, Hazlettville, Dover Base Housing, Dover
Speedway, Sandtown, Rising Sun, Wyoming, Kenton, Little Creek,
Leipsic, Henderson and Marydel.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
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.
&&
LAT...LON 3897 7573 3912 7587 3930 7558 3912 7538
TIME...MOT...LOC 0113Z 234DEG 13KT 3909 7573
HAIL THREAT...RADAR INDICATED
MAX HAIL SIZE...1.00 IN
WIND THREAT...RADAR INDICATED
MAX WIND GUST...60 MPH
$$
MPS1 follow-up statement
015
WWUS51 KPHI 080144
SVSPHI
Severe Weather Statement
National Weather Service Mount Holly NJ
944 PM EDT Thu Sep 7 2023
DEC001-MDC011-035-080154-
/O.CAN.KPHI.SV.W.0320.000000T0000Z-230908T0200Z/
Kent DE-Queen Anne's MD-Caroline MD-
944 PM EDT Thu Sep 7 2023
...THE SEVERE THUNDERSTORM WARNING FOR NORTHERN KENT...EAST CENTRAL
QUEEN ANNE'S AND NORTHEASTERN CAROLINE COUNTIES IS CANCELLED...
The storm which prompted the warning has weakened below severe
limits, and no longer poses an immediate threat to life or property.
Therefore, the warning has been cancelled.
To report severe weather, contact your nearest law enforcement
agency. They will relay your report to the National Weather Service
Mount Holly NJ.
LAT...LON 3897 7573 3912 7587 3930 7558 3912 7538
TIME...MOT...LOC 0142Z 234DEG 13KT 3916 7561
$$
MPSThe office that day
Everything else NWS Philadelphia/Mount Holly issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| 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 |
| Sep 8, 3:32 PM EDT | Severe Thunderstorm Warning | PHI | Sussex | 43 min |
| Sep 7, 8:21 PM EDT | Special Weather Statement | PHI | Caroline, Talbot | 24 min |
| Sep 7, 8:45 PM EDT | Severe Thunderstorm Warning | PHI | Caroline, Talbot | 26 min |
Nearby
Severe Thunderstorm Warnings in Maryland, 2023Severe 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; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.