Alert archive / Delaware / Severe Thunderstorm Warnings in 2021
Severe Thunderstorm Warning 266, NWS Philadelphia/Mount Holly
NWS Philadelphia/Mount Holly issued this severe thunderstorm warning at Aug 23, 2021, 7:14 PM EDT for Kent County, New Castle County, Delaware. It was in force for 31 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
- Aug 23, 2021, 7:14 PM EDT (23:14 UTC)
- Expired
- Aug 23, 2021, 7:45 PM EDT
- In force
- 31 min
- Issued by
- NWS Philadelphia/Mount Holly
- Area
- Storm-based polygon
- Hail
- 0.75 in
- Wind
- 60.0 mph
Counties Kent County, DE, New Castle County, DE
The radar
The Dover AFB radar (KDOX), 55 km from the middle of the area, began a volume at 23:14 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.
The nearest sounding before it
Wallops Is Stn, VA (KWAL), launched 12:00Z, 11.2 hours before the alert went out and 153 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
- 1 J/kg
- Mixed-layer CIN
- No buoyant parcel
- Mixed-layer LCL
- 1488 m above ground
- 0-6 km bulk shear
- 13 kt
- 0-1 km storm-relative helicity
- 16 m²/s²
- 0-3 km storm-relative helicity
- 45 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted.
600
WUUS51 KPHI 232314
SVRPHI
DEC001-003-240000-
/O.NEW.KPHI.SV.W.0266.210823T2314Z-210824T0000Z/
BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Mount Holly NJ
714 PM EDT Mon Aug 23 2021
The National Weather Service in Mount Holly NJ has issued a
* Severe Thunderstorm Warning for...
Southwestern New Castle County in northern Delaware...
Northern Kent County in central Delaware...
* Until 800 PM EDT.
* At 714 PM EDT, a severe thunderstorm was located over Green Spring,
or 8 miles south of Middletown, moving southeast at 25 mph.
HAZARD...60 mph wind gusts.
SOURCE...Radar indicated.
IMPACT...Damage to roofs, siding, trees, and power lines is
possible.
* Locations impacted include...
Dover, Middletown, Smyrna, Camden, Clayton, Cheswold, Woodside,
Hartly, Rising Sun-Lebanon, Hazlettville, Delaney Corner, Dover
Base Housing, Dover Speedway, Green Spring, Rising Sun, Townsend,
Wyoming, Odessa, Kenton and Little Creek.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
For your protection move to an interior room on the lowest floor of a
building.
&&
LAT...LON 3947 7565 3917 7534 3900 7568 3922 7576
3942 7577
TIME...MOT...LOC 2314Z 327DEG 23KT 3933 7569
HAIL THREAT...RADAR INDICATED
MAX HAIL SIZE...<.75 IN
WIND THREAT...RADAR INDICATED
MAX WIND GUST...60 MPH
$$
Davis2 follow-up statements
671
WWUS51 KPHI 232329
SVSPHI
Severe Weather Statement
National Weather Service Mount Holly NJ
729 PM EDT Mon Aug 23 2021
DEC003-232338-
/O.CAN.KPHI.SV.W.0266.000000T0000Z-210824T0000Z/
New Castle DE-
729 PM EDT Mon Aug 23 2021
...THE SEVERE THUNDERSTORM WARNING FOR SOUTHWESTERN NEW CASTLE COUNTY
IS CANCELLED...
The severe thunderstorm which prompted the warning has moved out of
the warned area. Therefore, the warning has been cancelled.
LAT...LON 3930 7569 3929 7565 3931 7562 3931 7558
3934 7555 3935 7556 3935 7553 3917 7534
3900 7568 3920 7576 3929 7576
TIME...MOT...LOC 2328Z 327DEG 23KT 3925 7562
$$
DEC001-240000-
/O.CON.KPHI.SV.W.0266.000000T0000Z-210824T0000Z/
Kent DE-
729 PM EDT Mon Aug 23 2021
...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 800 PM EDT
FOR NORTHERN KENT COUNTY...
At 728 PM EDT, a severe thunderstorm was located over Smyrna, or 8
miles northwest of Dover, moving southeast at 25 mph.
HAZARD...60 mph wind gusts.
SOURCE...Radar indicated.
IMPACT...Damage to roofs, siding, trees, and power lines is
possible.
Locations impacted include...
Dover, Smyrna, Camden, Clayton, Cheswold, Woodside, Hartly, Rising
Sun-Lebanon, Rising Sun, Hazlettville, Dover Base Housing, Dover
Speedway, Wyoming, Kenton, Little Creek, Leipsic, Rodney Village,
Kent Acres, Highland Acres and Woodside East.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
For your protection move to an interior room on the lowest floor of a
building.
&&
LAT...LON 3930 7569 3929 7565 3931 7562 3931 7558
3934 7555 3935 7556 3935 7553 3917 7534
3900 7568 3920 7576 3929 7576
TIME...MOT...LOC 2328Z 327DEG 23KT 3925 7562
HAIL THREAT...RADAR INDICATED
MAX HAIL SIZE...<.75 IN
WIND THREAT...RADAR INDICATED
MAX WIND GUST...60 MPH
$$
Davis004
WWUS51 KPHI 232345
SVSPHI
Severe Weather Statement
National Weather Service Mount Holly NJ
745 PM EDT Mon Aug 23 2021
DEC001-232354-
/O.CAN.KPHI.SV.W.0266.000000T0000Z-210824T0000Z/
Kent DE-
745 PM EDT Mon Aug 23 2021
...THE SEVERE THUNDERSTORM WARNING FOR NORTHERN KENT COUNTY IS
CANCELLED...
The storm which prompted the warning has weakened below severe
limits, and no longer poses an immediate threat to life or property.
Therefore, the warning has been cancelled. However gusty winds are
still possible with this thunderstorm.
LAT...LON 3930 7569 3929 7565 3931 7562 3931 7558
3934 7555 3935 7556 3935 7553 3917 7534
3900 7568 3920 7576 3929 7576
TIME...MOT...LOC 2343Z 327DEG 23KT 3916 7554
$$
DavisNearby
Severe Thunderstorm Warnings in Delaware, 2021Every severe thunderstorm warning in 2021
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.