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, 6:47 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
- Aug 13, 2021, 6:47 PM EDT (22:47 UTC)
- Expired
- Aug 13, 2021, 7:30 PM EDT
- In force
- 43 min
- Issued by
- NWS Philadelphia/Mount Holly
- Hail
- 0.25 in
- Wind
- 40
County Sussex County, DE
The radar
The Dover AFB radar (KDOX), 15 km from the middle of the area, began a volume at 22:48 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, 10.8 hours before the alert went out and 89 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.
011
WWUS81 KPHI 132247
SPSPHI
Special Weather Statement
National Weather Service Mount Holly NJ
647 PM EDT Fri Aug 13 2021
DEZ003-132330-
Inland Sussex DE-
647 PM EDT Fri Aug 13 2021
...A cluster of strong thunderstorms will impact portions of
southern Sussex County through 730 PM EDT...
At 647 PM EDT, Doppler radar was tracking a cluster of strong
thunderstorms near Georgetown, moving southeast at 10 mph.
HAZARD...Winds in excess of 40 mph and pea size hail.
SOURCE...Radar indicated.
IMPACT...Gusty winds could knock down tree limbs and blow around
unsecured objects. Minor damage to outdoor objects is
possible.
Locations impacted include...
Georgetown, Seaford, Laurel, Milton, Bridgeville, Ellendale,
Sycamore, Blades, Greenwood and Bethel.
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.
A Severe Thunderstorm Watch remains in effect until 800 PM EDT for
eastern Maryland.
&&
LAT...LON 3847 7551 3868 7572 3879 7572 3883 7571
3884 7568 3884 7562 3881 7537 3875 7517
TIME...MOT...LOC 2247Z 299DEG 10KT 3867 7548
MAX HAIL SIZE...0.25 IN
MAX WIND GUST...40 MPH
$$
NCThe 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, 3:21 PM EDT | Special Weather Statement | PHI | Sussex | 24 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, 6:53 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.