Alert archive / Delaware / Special Weather Statements in 2021
Special Weather Statement, NWS Philadelphia/Mount Holly
NWS Philadelphia/Mount Holly issued this special weather statement at Aug 13, 2021, 3:21 PM EDT for Sussex County, Delaware. It was in force for 24 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 13, 2021, 3:21 PM EDT (19:21 UTC)
- Expired
- Aug 13, 2021, 3:45 PM EDT
- In force
- 24 min
- Issued by
- NWS Philadelphia/Mount Holly
- Hail
- 0.00 in
- Wind
- 40
County Sussex County, DE
The radar
The Dover AFB radar (KDOX), 49 km from the middle of the area, began a volume at 19:24 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, 7.4 hours before the alert went out and 69 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
- 809 J/kg
- Mixed-layer CIN
- -190 J/kg
- Mixed-layer LCL
- 1510 m above ground
- 0-6 km bulk shear
- 16 kt
- 0-1 km storm-relative helicity
- 55 m²/s²
- 0-3 km storm-relative helicity
- 32 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted.
405
WWUS81 KPHI 131921
SPSPHI
Special Weather Statement
National Weather Service Mount Holly NJ
321 PM EDT Fri Aug 13 2021
DEZ003-004-131945-
Inland Sussex DE-Delaware Beaches DE-
321 PM EDT Fri Aug 13 2021
...A strong thunderstorm will impact portions of southeastern Sussex
County through 345 PM EDT...
At 321 PM EDT, Doppler radar was tracking a strong thunderstorm over
Millville, or 11 miles north of Ocean City. This storm was nearly
stationary.
HAZARD...Winds in excess of 40 mph.
SOURCE...Radar indicated.
IMPACT...Gusty winds could knock down tree limbs and blow around
unsecured objects.
Locations impacted include...
Selbyville, Dagsboro, Millville, Long Neck, Ocean View, Frankford and
South Bethany.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
If outdoors, consider seeking shelter inside a building.
Torrential rainfall is also occurring with this storm and may lead to
localized flooding. Do not drive your vehicle through flooded
roadways.
Frequent cloud to ground lightning is occurring with this storm.
Lightning can strike 10 miles away from a thunderstorm. Seek a safe
shelter inside a building or vehicle.
&&
LAT...LON 3845 7502 3846 7505 3845 7505 3845 7526
3857 7526 3868 7506 3845 7486
TIME...MOT...LOC 1921Z 234DEG 3KT 3853 7511
MAX HAIL SIZE...0.00 IN
MAX WIND GUST...40 MPH
$$
POThe office that day
Everything else NWS Philadelphia/Mount Holly issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Aug 12, 11:49 PM EDT | Special Weather Statement | PHI | Hunterdon, Middlesex, Morris, Somerset, Sussex, Warren | 56 min |
| Aug 13, 7:32 PM EDT | Special Marine Warning | PHI | 88 min | |
| Aug 12, 10:27 PM EDT | Severe Thunderstorm Warning | PHI | Berks, Carbon | 48 min |
| Aug 12, 11:20 PM EDT | Special Weather Statement | PHI | Carbon, Lehigh, Northampton | 40 min |
| Aug 13, 5:31 PM EDT | Special Weather Statement | PHI | Chester | 44 min |
| Aug 13, 6:04 PM EDT | Special Weather Statement | PHI | Sussex | 26 min |
| Aug 13, 6:45 PM EDT | Severe Thunderstorm Warning | PHI | Kent | 30 min |
| Aug 13, 6:47 PM EDT | Special Weather Statement | PHI | Sussex | 43 min |
| Aug 13, 6:53 PM EDT | Severe Thunderstorm Warning | PHI | Sussex | 37 min |
| Aug 13, 7:12 PM EDT | Severe Thunderstorm Warning | PHI | Kent, Sussex | 33 min |
| Aug 13, 7:30 PM EDT | Special Weather Statement | PHI | Sussex | 45 min |
| Aug 13, 7:43 PM EDT | Severe Thunderstorm Warning | PHI | Kent, Sussex | 47 min |
| Aug 13, 7:57 PM EDT | Areal Flood Advisory | PHI | Kent, Sussex | 93 min |
| Aug 13, 6:02 PM EDT | Special Weather Statement | PHI | Kent, Queen Anne's | 58 min |
| Aug 13, 6:29 PM EDT | Special Weather Statement | PHI | Caroline | 31 min |
| Aug 13, 6:29 PM EDT | Severe Thunderstorm Warning | PHI | Queen Anne's, Talbot | 25 min |
Nearby
Special Weather Statements in Delaware, 2021Every special weather statement 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.