Alert archive / Delaware / Special Weather Statements in 2020

Special Weather Statement, NWS Philadelphia/Mount Holly

August 7, 2020Kent County, Delaware

NWS Philadelphia/Mount Holly issued this special weather statement at Aug 7, 2020, 7:36 PM EDT for Kent County, Delaware. It was in force for 39 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 7, 2020, 7:36 PM EDT (23:36 UTC)
Expired: Aug 7, 2020, 8:15 PM EDT
In force: 39 min
Issued by: NWS Philadelphia/Mount Holly

County Kent County, DE

The radar

The Dover AFB radar (KDOX), 34 km from the middle of the area, began a volume at 23:38 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, 11.6 hours before the alert went out and 133 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.

Skew-T log-p

Temperature in red, dew point in green, the mixed-layer parcel dashed.

Hodograph

The wind turning with height, colored by layer: ground to 1 km, 1 to 3 km, 3 to 6 km, 6 to 10 km.

Mixed-layer CAPE: 248 J/kg
Mixed-layer CIN: -58 J/kg
Mixed-layer LCL: 738 m above ground
0-6 km bulk shear: 30 kt
0-1 km storm-relative helicity: 6 m²/s²
0-3 km storm-relative helicity: 31 m²/s²
Significant tornado parameter: 0.0
Supercell composite: -0.0

Open this sounding in Storm Lab

The text

As transmitted.

228 
WWUS81 KPHI 072336
SPSPHI

Special Weather Statement
National Weather Service Mount Holly NJ
736 PM EDT Fri Aug 7 2020

DEZ002-MDZ015-020-080015-
Kent-Queen Anne's-Caroline-
736 PM EDT Fri Aug 7 2020

...A LINE OF STRONG THUNDERSTORMS WILL AFFECT CENTRAL KENT...
NORTHEASTERN QUEEN ANNE'S AND NORTHEASTERN CAROLINE COUNTIES...

At 736 PM EDT, radar indicated strong thunderstorms were located
along a line extending from 7 miles west of Newport to Dover to near
Sudlersville. Movement was east at 15 mph.

Wind gusts up to 50 mph are possible with these storms.

Locations impacted include...
Dover, Camden, Greensboro, Bowers, Goldsboro, Woodside, Viola,
Hartly, Rising Sun-Lebanon, Hazlettville, Dover Base Housing, Dover
Speedway, Sandtown, Rising Sun, Wyoming, Felton, Frederica, Magnolia,
Little Creek and Henderson.

Torrential rainfall is also occurring with these storms, and may
cause 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 3919 7560 3927 7535 3908 7521 3894 7546
      3897 7585 3917 7591
TIME...MOT...LOC 2336Z 291DEG 12KT 3926 7531 3917 7552 3914 7588 

$$

BAH

The office that day

Everything else NWS Philadelphia/Mount Holly issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
Aug 7, 5:15 PM EDT	Areal Flood Advisory	PHI	Hunterdon, Warren	3 hr
Aug 7, 5:25 PM EDT	Areal Flood Advisory	PHI	Burlington, Camden, Gloucester, Salem	3 hr
Aug 7, 5:43 PM EDT	Flash Flood Warning	PHI	Camden, Gloucester	4 hr
Aug 7, 5:57 PM EDT	Severe Thunderstorm Warning	PHI	Atlantic, Burlington, Camden, Cumberland, Gloucester, Salem	48 min
Aug 7, 6:00 PM EDT	Tornado Warning	PHI	Gloucester, Salem	30 min
Aug 7, 6:08 PM EDT	Areal Flood Advisory	PHI	Cumberland, Gloucester, Salem	3 hr
Aug 7, 6:16 PM EDT	Areal Flood Advisory	PHI	Mercer	2 hr
Aug 7, 6:24 PM EDT	Special Marine Warning	PHI		66 min
Aug 7, 6:39 PM EDT	Severe Thunderstorm Warning	PHI	Burlington, Hunterdon, Mercer	27 min
Aug 7, 6:41 PM EDT	Severe Thunderstorm Warning	PHI	Atlantic, Camden, Cumberland, Gloucester, Salem	49 min
Aug 7, 6:57 PM EDT	Severe Thunderstorm Warning	PHI	Atlantic, Camden, Cumberland, Gloucester, Salem	48 min
Aug 7, 7:24 PM EDT	Special Marine Warning	PHI		66 min
Aug 7, 7:25 PM EDT	Flash Flood Warning	PHI	Atlantic, Cape May, Cumberland, Gloucester	4 hr
Aug 7, 7:28 PM EDT	Severe Thunderstorm Warning	PHI	Atlantic, Burlington, Camden, Cape May, Cumberland, Gloucester and 1 more	62 min
Aug 7, 6:49 AM EDT	Areal Flood Advisory	PHI	Berks	4 hr
Aug 7, 9:22 AM EDT	Areal Flood Advisory	PHI	Bucks	3 hr
Aug 7, 10:34 AM EDT	Severe Thunderstorm Warning	PHI	Carbon, Lehigh	56 min
Aug 7, 11:28 AM EDT	Special Weather Statement	PHI	Carbon, Lehigh	47 min
Aug 7, 2:34 PM EDT	Areal Flood Advisory	PHI	Berks	4 hr
Aug 7, 3:46 PM EDT	Areal Flood Advisory	PHI	Carbon, Lehigh, Northampton	4 hr
Aug 7, 4:10 PM EDT	Flash Flood Warning	PHI	Berks	2 hr
Aug 7, 4:20 PM EDT	Areal Flood Advisory	PHI	Chester, Montgomery	4 hr
Aug 7, 4:32 PM EDT	Flash Flood Warning	PHI	Chester	3 hr
Aug 7, 4:47 PM EDT	Special Weather Statement	PHI	Chester	28 min
Aug 7, 5:00 PM EDT	Severe Thunderstorm Warning	PHI	Chester	60 min
Aug 7, 5:03 PM EDT	Flash Flood Warning	PHI	Chester, Delaware	5 hr
Aug 7, 5:38 PM EDT	Severe Thunderstorm Warning	PHI	Chester, Delaware, Montgomery, Philadelphia	52 min
Aug 7, 5:49 PM EDT	Tornado Warning	PHI	Chester, Delaware	26 min
Aug 7, 7:10 PM EDT	River Flood Warning	PHI	Delaware	7 hr
Aug 7, 7:17 PM EDT	Areal Flood Warning	PHI	Bucks, Montgomery	3 hr
Aug 7, 6:12 PM EDT	Severe Thunderstorm Warning	PHI	Kent, New Castle	63 min
Aug 7, 6:43 PM EDT	Areal Flood Advisory	PHI	Kent, New Castle	4 hr
Aug 7, 7:04 PM EDT	Severe Thunderstorm Warning	PHI	Kent, New Castle	41 min
Aug 7, 7:21 PM EDT	Flash Flood Warning	PHI	Kent, New Castle	5 hr
Aug 7, 7:28 PM EDT	River Flood Warning	PHI	New Castle	2 hr
Aug 7, 4:41 PM EDT	Areal Flood Advisory	PHI	Cecil	3 hr
Aug 7, 7:44 PM EDT	Flash Flood Warning	PHI	Caroline, Kent, Queen Anne's	4 hr

Nearby

Special Weather Statements in Delaware, 2020 Every special weather statement in 2020

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.