Alert archive / Delaware / Special Weather Statements in 2018

Special Weather Statement, NWS Philadelphia/Mount Holly

April 4, 2018Kent County, Delaware

NWS Philadelphia/Mount Holly issued this special weather statement at Apr 4, 2018, 12:49 PM EDT for Kent County, Delaware. It was in force for 26 min. 1 report came from inside the area while it was in force.

The area

The outline as issued, with what was reported inside it.

The facts

Issued: Apr 4, 2018, 12:49 PM EDT (16:49 UTC)
Expired: Apr 4, 2018, 1:15 PM EDT
In force: 26 min
Issued by: NWS Philadelphia/Mount Holly

County Kent County, DE

The radar

The Dover AFB radar (KDOX), 31 km from the middle of the area, began a volume at 16:50 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.

What was reported inside it

Time	Report	Where	Remark
Apr 4, 1:18 PM EDT	NON-TSTM WND GST 47	Dover, DE

Local storm reports filed while the alert was in force, from inside its polygon or its counties.

The nearest sounding before it

Wallops Is Stn, VA (KWAL), launched 12:00Z, 4.8 hours before the alert went out and 130 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: 117 J/kg
Mixed-layer CIN: -288 J/kg
Mixed-layer LCL: 959 m above ground
0-6 km bulk shear: 46 kt
0-1 km storm-relative helicity: 287 m²/s²
0-3 km storm-relative helicity: 257 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

As transmitted.

416 
WWUS81 KPHI 041649
SPSPHI

Special Weather Statement
National Weather Service Mount Holly NJ
1249 PM EDT WED APR 4 2018

DEZ002-MDZ020-041715-
Kent-Caroline-
1249 PM EDT WED APR 4 2018

...A STRONG THUNDERSTORM WILL AFFECT CENTRAL KENT AND NORTHEASTERN
CAROLINE COUNTIES...

At 1249 PM EDT, a strong thunderstorm was located near Sandtown, or
10 miles southwest of Dover, moving east at 45 mph.

Winds up to 50 mph are possible with this storm.

Locations impacted include...
Dover, Camden, Bowers, Goldsboro, Woodside, Viola, Rising
Sun-Lebanon, Rising Sun, Hazlettville, Dover Base Housing, Sandtown,
Wyoming, Felton, Frederica, Magnolia, Little Creek, Henderson, Rodney
Village, Kent Acres and Riverview.

This storm may intensify, so be certain to monitor local radio
stations and available television stations for additional information
and possible warnings from the National Weather Service.

LAT...LON 3909 7580 3922 7540 3920 7540 3915 7541
      3911 7540 3907 7540 3907 7541 3902 7534
      3894 7577
TIME...MOT...LOC 1649Z 250DEG 38KT 3905 7565 

$$

jrk

The office that day

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

Issued	Product	Office	Counties	Lasted
Apr 3, 9:42 PM EDT	Marine Dense Fog Advisory	PHI		14 hr
Apr 4, 12:01 AM EDT	Dense Fog Advisory	PHI	Burlington, Camden, Gloucester, Hunterdon, Mercer, Middlesex and 7 more	10 hr
Apr 4, 2:56 AM EDT	Special Weather Statement	PHI	Sussex	34 min
Apr 4, 3:44 AM EDT	High Wind Warning	PHI	Burlington, Camden, Gloucester, Hunterdon, Mercer, Morris and 3 more	16 hr
Apr 4, 12:29 PM EDT	Special Weather Statement	PHI	Camden	31 min
Apr 4, 12:39 PM EDT	Severe Thunderstorm Warning	PHI	Burlington, Camden, Gloucester, Mercer, Middlesex, Monmouth and 2 more	51 min
Apr 4, 12:54 PM EDT	Special Marine Warning	PHI		96 min
Apr 4, 1:07 PM EDT	Special Marine Warning	PHI		113 min
Apr 4, 1:13 PM EDT	Special Weather Statement	PHI	Atlantic, Cape May, Cumberland	62 min
Apr 4, 1:26 PM EDT	Special Weather Statement	PHI	Burlington, Camden, Middlesex, Monmouth, Ocean	49 min
Apr 4, 1:46 PM EDT	Areal Flood Advisory	PHI	Atlantic, Burlington, Cumberland	4 hr
Apr 4, 1:46 PM EDT	Special Marine Warning	PHI		59 min
Apr 4, 2:15 PM EDT	Special Weather Statement	PHI	Cape May, Ocean	30 min
Apr 4, 2:45 PM EDT	Special Marine Warning	PHI		90 min
Apr 4, 2:58 PM EDT	Special Marine Warning	PHI		92 min
Apr 4, 2:17 PM EDT	Special Weather Statement	PHI	Sussex	43 min

Nearby

Special Weather Statements in Delaware, 2018 Every special weather statement in 2018

Sources

The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.