Alert archive / Delaware / Special Weather Statements in 2021

Special Weather Statement, NWS Philadelphia/Mount Holly

October 25, 2021Sussex County, Delaware

NWS Philadelphia/Mount Holly issued this special weather statement at Oct 25, 2021, 4:15 PM EDT for Sussex County, Delaware. It was in force for 30 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: Oct 25, 2021, 4:15 PM EDT (20:15 UTC)
Expired: Oct 25, 2021, 4:45 PM EDT
In force: 30 min
Issued by: NWS Philadelphia/Mount Holly
Hail: 0.25 in
Wind: 40

County Sussex County, DE

The radar

The Dover AFB radar (KDOX), 10 km from the middle of the area, began a volume at 20:19 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, 8.3 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.

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: 168 J/kg
Mixed-layer CIN: -104 J/kg
Mixed-layer LCL: 959 m above ground
0-6 km bulk shear: 18 kt
0-1 km storm-relative helicity: 114 m²/s²
0-3 km storm-relative helicity: 99 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

As transmitted.

155 
WWUS81 KPHI 252015
SPSPHI

Special Weather Statement
National Weather Service Mount Holly NJ
415 PM EDT Mon Oct 25 2021
 
DEZ003-252045-
Inland Sussex DE-
415 PM EDT Mon Oct 25 2021

...A strong thunderstorm will impact portions of central Sussex
County through 445 PM EDT...

At 415 PM EDT, Doppler radar was tracking a strong thunderstorm near
Ellendale, or near Georgetown, moving north at 30 mph.

HAZARD...Wind gusts up to 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, Milton and Ellendale. 

PRECAUTIONARY/PREPAREDNESS ACTIONS...

If outdoors, consider seeking shelter inside a building. 

&&

LAT...LON 3864 7541 3865 7552 3889 7547 3885 7528
TIME...MOT...LOC 2015Z 185DEG 25KT 3875 7545 

MAX HAIL SIZE...0.25 IN
MAX WIND GUST...40 MPH

$$

JEO

The office that day

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

Issued	Product	Office	Counties	Lasted
Oct 25, 3:12 AM EDT	Gale Watch	PHI		13 hr
Oct 25, 4:15 PM EDT	Gale Warning	PHI		46 hr
Oct 25, 6:03 PM EDT	Special Marine Warning	PHI		57 min
Oct 25, 6:27 PM EDT	Special Weather Statement	PHI	Salem	33 min
Oct 25, 6:33 PM EDT	Severe Thunderstorm Warning	PHI	Salem	42 min
Oct 25, 7:02 PM EDT	Special Weather Statement	PHI	Camden, Gloucester, Salem	43 min
Oct 25, 7:34 PM EDT	Severe Thunderstorm Warning	PHI	Burlington, Camden, Gloucester	26 min
Oct 25, 6:57 PM EDT	Severe Thunderstorm Warning	PHI	Berks, Chester, Delaware	48 min
Oct 25, 7:43 PM EDT	Special Weather Statement	PHI	Bucks, Montgomery	47 min
Oct 25, 5:27 PM EDT	Special Weather Statement	PHI	Kent	33 min
Oct 25, 5:06 PM EDT	Special Weather Statement	PHI	Talbot	39 min
Oct 25, 5:42 PM EDT	Special Weather Statement	PHI	Kent, Queen Anne's	48 min

Nearby

Special Weather Statements in Delaware, 2021 Every 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.