Alert archive / Delaware / Special Weather Statements in 2020

Special Weather Statement, NWS Philadelphia/Mount Holly

May 1, 2020Sussex County, Delaware

NWS Philadelphia/Mount Holly issued this special weather statement at May 1, 2020, 12:13 PM EDT for Sussex County, Delaware. It was in force for 32 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: May 1, 2020, 12:13 PM EDT (16:13 UTC)
Expired: May 1, 2020, 12:45 PM EDT
In force: 32 min
Issued by: NWS Philadelphia/Mount Holly

County Sussex County, DE

The radar

The Dover AFB radar (KDOX), 40 km from the middle of the area, began a volume at 16:17 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, 4.2 hours before the alert went out and 78 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: 67 J/kg
Mixed-layer CIN: -113 J/kg
Mixed-layer LCL: 922 m above ground
0-6 km bulk shear: 72 kt
0-1 km storm-relative helicity: 45 m²/s²
0-3 km storm-relative helicity: 98 m²/s²
Significant tornado parameter: 0.0
Supercell composite: -0.0

Open this sounding in Storm Lab

The text

As transmitted.

056 
WWUS81 KPHI 011613
SPSPHI

Special Weather Statement
National Weather Service Mount Holly NJ
1213 PM EDT Fri May 1 2020

DEZ004-011645-
Delaware Beaches-
1213 PM EDT Fri May 1 2020

...A STRONG THUNDERSTORM WILL AFFECT EAST CENTRAL SUSSEX COUNTY...

At 1213 PM EDT, a strong thunderstorm was located near Millville, or
16 miles north of Ocean City, moving northeast at 5 mph.

Wind gusts up to 40 mph and half inch hail are possible with this
storm.

Locations impacted include...
Millville, Ocean View and South Bethany. 

If outdoors, consider seeking shelter inside a building.

Torrential rainfall is also occurring with this storm, and may cause
localized flooding. Do not drive your vehicle through flooded
roadways.

LAT...LON 3859 7512 3862 7512 3870 7506 3851 7504
      3850 7511
TIME...MOT...LOC 1613Z 232DEG 6KT 3860 7507 

$$

Staarmann

The office that day

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

Issued	Product	Office	Counties	Lasted
Apr 30, 11:49 PM EDT	Small Craft Advisory	PHI		40 hr
May 1, 11:52 AM EDT	Special Marine Warning	PHI		68 min
May 1, 1:32 PM EDT	Special Weather Statement	PHI	Monmouth	13 min
May 1, 2:32 PM EDT	Special Weather Statement	PHI	Monmouth	13 min
May 1, 2:44 PM EDT	Special Weather Statement	PHI	Atlantic	31 min
May 1, 3:17 PM EDT	Special Weather Statement	PHI	Ocean	13 min
May 1, 3:27 PM EDT	Special Weather Statement	PHI	Ocean	33 min
May 1, 3:47 PM EDT	Special Weather Statement	PHI	Ocean	43 min
May 1, 4:04 PM EDT	Special Weather Statement	PHI	Monmouth	26 min
May 1, 4:42 PM EDT	Special Weather Statement	PHI	Atlantic	18 min
May 1, 4:47 PM EDT	Special Weather Statement	PHI	Monmouth	43 min
May 1, 5:11 PM EDT	Special Weather Statement	PHI	Atlantic	34 min
May 1, 5:33 PM EDT	Special Weather Statement	PHI	Atlantic	42 min
May 1, 6:28 PM EDT	Areal Flood Advisory	PHI	Atlantic	2 hr
Apr 30, 8:22 PM EDT	Areal Flood Advisory	PHI	Berks, Carbon, Lehigh, Monroe	4 hr
May 1, 8:48 AM EDT	Special Weather Statement	PHI	Sussex	57 min
May 1, 9:50 AM EDT	Special Weather Statement	PHI	Sussex	40 min
May 1, 11:30 AM EDT	Special Weather Statement	PHI	Sussex	45 min
May 1, 8:04 AM EDT	Special Weather Statement	PHI	Caroline	56 min

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.