Alert archive / Delaware / Severe Thunderstorm Warnings in 2021
Severe Thunderstorm Warning 93, NWS Philadelphia/Mount Holly
NWS Philadelphia/Mount Holly issued this severe thunderstorm warning at Jun 14, 2021, 11:51 PM EDT for Kent County, Sussex County, Delaware; Caroline County, Maryland. It was in force for 54 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
- Jun 14, 2021, 11:51 PM EDT (03:51 UTC)
- Expired
- Jun 15, 2021, 12:45 AM EDT
- In force
- 54 min
- Issued by
- NWS Philadelphia/Mount Holly
- Area
- Storm-based polygon
- Hail
- 1.0 in
- Wind
- 70.0 mph
Counties Kent County, DE, Sussex County, DE, Caroline County, MD
The radar
The Dover AFB radar (KDOX), 25 km from the middle of the area, began a volume at 03:51 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 |
|---|---|---|---|
| Jun 14, 7:29 PM EDT | Severe Thunderstorm Watch | SPC | 6 hr |
The nearest sounding before it
Wallops Is Stn, VA (KWAL), launched 00:00Z, 3.9 hours before the alert went out and 123 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
- 464 J/kg
- Mixed-layer CIN
- -64 J/kg
- Mixed-layer LCL
- 989 m above ground
- 0-6 km bulk shear
- 35 kt
- 0-1 km storm-relative helicity
- 5 m²/s²
- 0-3 km storm-relative helicity
- 38 m²/s²
- Significant tornado parameter
- -0.0
- Supercell composite
- -0.0
The text
As transmitted.
006
WUUS51 KPHI 150351
SVRPHI
DEC001-005-MDC011-150445-
/O.NEW.KPHI.SV.W.0093.210615T0351Z-210615T0445Z/
BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Mount Holly NJ
1151 PM EDT Mon Jun 14 2021
The National Weather Service in Mount Holly NJ has issued a
* Severe Thunderstorm Warning for...
Northwestern Sussex County in southern Delaware...
Kent County in central Delaware...
Northeastern Caroline County in eastern Maryland...
* Until 1245 AM EDT.
* At 1150 PM EDT, severe thunderstorms were located along a line
extending from near Hazlettville to near Sandtown to near Ridgely,
moving east at 30 mph.
HAZARD...70 mph wind gusts and quarter size hail.
SOURCE...Radar indicated.
IMPACT...Minor damage to vehicles is possible. Expect considerable
tree damage. Wind damage is also likely to mobile homes,
roofs, and outbuildings.
* Locations impacted include...
Dover, Georgetown, Milford, Denton, Harrington, Camden,
Bridgeville, Greensboro, Ridgely, Cheswold, Ellendale, Bowers,
Goldsboro, Woodside, Viola, Hartly, Rising Sun-Lebanon,
Hazlettville, Dover Base Housing and Dover Speedway.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Prepare immediately for large hail and damaging winds. People outside
should move immediately to shelter inside a strong building. Stay
away from windows.
Torrential rainfall is occurring with these storms, and may lead to
flash flooding. Do not drive your vehicle through flooded roadways.
&&
LAT...LON 3920 7538 3888 7525 3865 7544 3892 7595
3909 7574 3925 7575
TIME...MOT...LOC 0350Z 289DEG 24KT 3915 7566 3901 7575 3892 7586
HAIL...1.00IN
WIND...70MPH
$$
Staarmann2 follow-up statements
607
WWUS51 KPHI 150416
SVSPHI
Severe Weather Statement
National Weather Service Mount Holly NJ
1216 AM EDT Tue Jun 15 2021
DEC001-005-MDC011-150445-
/O.CON.KPHI.SV.W.0093.000000T0000Z-210615T0445Z/
Sussex DE-Kent DE-Caroline MD-
1216 AM EDT Tue Jun 15 2021
...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 1245 AM EDT
FOR NORTHWESTERN SUSSEX...SOUTHERN KENT AND EAST CENTRAL CAROLINE
COUNTIES...
At 1216 AM EDT, severe thunderstorms were located along a line
extending from Dover Base Housing to near Harrington to Andrewsville,
moving east at 30 mph.
HAZARD...60 mph wind gusts and quarter size hail.
SOURCE...Radar indicated.
IMPACT...Minor damage to vehicles is possible. Wind damage to roofs,
siding, trees, and power lines is possible.
Locations impacted include...
Dover, Georgetown, Milford, Denton, Harrington, Camden, Bridgeville,
Cheswold, Ellendale, Bowers, Woodside, Viola, Rising Sun-Lebanon,
Dover Base Housing, Dover Speedway, Andrewsville, Rising Sun, Big
Stone Beach, Wyoming and Felton.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Prepare immediately for large hail and damaging winds. People outside
should seek shelter inside a well-built structure and away from
windows.
Torrential rainfall is occurring with these storms, and may lead to
flash flooding. Do not drive your vehicle through flooded roadways.
&&
LAT...LON 3890 7591 3896 7568 3914 7559 3923 7563
3923 7560 3920 7538 3888 7525 3865 7544
TIME...MOT...LOC 0416Z 288DEG 24KT 3911 7546 3896 7555 3887 7566
HAIL...1.00IN
WIND...60MPH
$$
Staarmann219
WWUS51 KPHI 150436
SVSPHI
Severe Weather Statement
National Weather Service Mount Holly NJ
1236 AM EDT Tue Jun 15 2021
DEC001-MDC011-150445-
/O.CAN.KPHI.SV.W.0093.000000T0000Z-210615T0445Z/
Kent DE-Caroline MD-
1236 AM EDT Tue Jun 15 2021
...THE SEVERE THUNDERSTORM WARNING FOR KENT AND EAST CENTRAL CAROLINE
COUNTIES IS CANCELLED...
The storms which prompted the warning have moved out of the warned
area. Therefore, the warning has been cancelled.
A Severe Thunderstorm Watch remains in effect until 200 AM EDT for
central and southern Delaware.
LAT...LON 3880 7572 3884 7564 3884 7555 3888 7552
3891 7542 3896 7539 3895 7532 3898 7531
3903 7536 3904 7531 3888 7525 3865 7544
TIME...MOT...LOC 0435Z 290DEG 26KT 3900 7534 3889 7536 3876 7551
$$
DEC005-150445-
/O.CON.KPHI.SV.W.0093.000000T0000Z-210615T0445Z/
Sussex DE-
1236 AM EDT Tue Jun 15 2021
...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 1245 AM EDT
FOR NORTHWESTERN SUSSEX COUNTY...
At 1235 AM EDT, severe thunderstorms were located along a line
extending from Big Stone Beach to near Milford to near Bridgeville,
moving east at 30 mph.
HAZARD...60 mph wind gusts.
SOURCE...Radar indicated.
IMPACT...Damage to roofs, siding, trees, and power lines is
possible.
Locations impacted include...
Georgetown, Milford, Bridgeville, Ellendale, Big Stone Beach and
Greenwood.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Prepare immediately for large hail and damaging winds. People outside
should seek shelter inside a well-built structure and away from
windows.
Torrential rainfall is occurring with these storms, and may lead to
flash flooding. Do not drive your vehicle through flooded roadways.
&&
LAT...LON 3880 7572 3884 7564 3884 7555 3888 7552
3891 7542 3896 7539 3895 7532 3898 7531
3903 7536 3904 7531 3888 7525 3865 7544
TIME...MOT...LOC 0435Z 290DEG 26KT 3900 7534 3889 7536 3876 7551
HAIL...<.75IN
WIND...60MPH
$$
StaarmannThe office that day
Everything else NWS Philadelphia/Mount Holly issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jun 14, 8:55 PM EDT | Severe Thunderstorm Warning | PHI | New Castle | 50 min |
| Jun 14, 11:12 PM EDT | Severe Thunderstorm Warning | PHI | Kent | 63 min |
| Jun 14, 11:39 PM EDT | Areal Flood Advisory | PHI | Kent, New Castle | 85 min |
| Jun 14, 11:42 PM EDT | Severe Thunderstorm Warning | PHI | Kent, New Castle | 63 min |
| Jun 14, 11:54 PM EDT | Severe Thunderstorm Warning | PHI | Sussex | 66 min |
| Jun 14, 10:23 PM EDT | Severe Thunderstorm Warning | PHI | Kent, Queen Anne's | 67 min |
| Jun 14, 10:55 PM EDT | Areal Flood Advisory | PHI | Kent, Queen Anne's | 2 hr |
| Jun 14, 11:03 PM EDT | Severe Thunderstorm Warning | PHI | Caroline, Kent, Queen Anne's, Talbot | 57 min |
Nearby
Severe Thunderstorm Warnings in Delaware, 2021Severe Thunderstorm Warnings in Maryland, 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.