Alert archive / Delaware / Special Weather Statements in 2017
Special Weather Statement, NWS Philadelphia/Mount Holly
NWS Philadelphia/Mount Holly issued this special weather statement at Jun 21, 2017, 10:32 PM EDT for Sussex County, Delaware. It was in force for 58 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 21, 2017, 10:32 PM EDT (02:32 UTC)
- Expired
- Jun 21, 2017, 11:30 PM EDT
- In force
- 58 min
- Issued by
- NWS Philadelphia/Mount Holly
County Sussex County, DE
The radar
The Dover AFB radar (KDOX), 32 km from the middle of the area, began a volume at 02:32 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 00:00Z, 2.5 hours before the alert went out and 74 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
- 239 J/kg
- Mixed-layer CIN
- -33 J/kg
- Mixed-layer LCL
- 1243 m above ground
- 0-6 km bulk shear
- 61 kt
- 0-1 km storm-relative helicity
- 67 m²/s²
- 0-3 km storm-relative helicity
- 79 m²/s²
- Significant tornado parameter
- 0.1
- Supercell composite
- 1.1
The text
As transmitted.
521
WWUS81 KPHI 220232
SPSPHI
Special Weather Statement
National Weather Service Mount Holly NJ
1032 PM EDT WED JUN 21 2017
DEZ003-004-220330-
Inland Sussex-Delaware Beaches-
1032 PM EDT WED JUN 21 2017
...A LINE OF STRONG THUNDERSTORMS WILL AFFECT SOUTHERN SUSSEX
COUNTY...
At 1031 PM EDT, radar indicated strong thunderstorms were located
along a line extending from near Sycamore to 6 miles east of
Millville. Movement was southeast at 35 mph.
Winds up to 40 mph and pea size hail are possible with these storms.
Locations impacted include...
Georgetown, Seaford, Millsboro, Laurel, Selbyville, Delmar, Dagsboro,
Millville, Gumboro, Sycamore, Long Neck, Ocean View, Blades,
Frankford, South Bethany and Bethel.
LAT...LON 3846 7566 3847 7568 3866 7571 3868 7514
3864 7513 3863 7512 3868 7507 3862 7507
3862 7511 3859 7521 3857 7518 3859 7514
3858 7507 3860 7510 3861 7506 3860 7506
3845 7505
TIME...MOT...LOC 0231Z 313DEG 32KT 3857 7547 3856 7501
$$
POThe office that day
Everything else NWS Philadelphia/Mount Holly issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jun 21, 8:18 PM EDT | Special Weather Statement | PHI | Cape May | 27 min |
| Jun 21, 8:22 PM EDT | Special Marine Warning | PHI | 83 min | |
| Jun 21, 9:06 PM EDT | Special Marine Warning | PHI | 84 min | |
| Jun 22, 3:31 AM EDT | Coastal Flood Advisory | PHI | Atlantic, Burlington, Cape May, Middlesex, Monmouth, Ocean | 17 hr |
| Jun 22, 3:55 PM EDT | Small Craft Advisory | PHI | 60 hr | |
| Jun 21, 8:51 PM EDT | Special Weather Statement | PHI | Sussex | 24 min |
| Jun 21, 9:15 PM EDT | Special Weather Statement | PHI | Sussex | 30 min |
| Jun 21, 9:46 PM EDT | Special Weather Statement | PHI | Sussex | 29 min |
Nearby
Special Weather Statements in Delaware, 2017Every special weather statement in 2017
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.