Alert archive / Delaware / Special Weather Statements in 2017

Special Weather Statement, NWS Philadelphia/Mount Holly

July 1, 2017Kent County, Delaware

NWS Philadelphia/Mount Holly issued this special weather statement at Jul 1, 2017, 6:27 PM EDT for Kent County, Delaware. It was in force for 33 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: Jul 1, 2017, 6:27 PM EDT (22:27 UTC)
Expired: Jul 1, 2017, 7:00 PM EDT
In force: 33 min
Issued by: NWS Philadelphia/Mount Holly

County Kent County, DE

The radar

The Dover AFB radar (KDOX), 10 km from the middle of the area, began a volume at 22:28 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, 10.5 hours before the alert went out and 99 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: 96 J/kg
Mixed-layer CIN: -48 J/kg
Mixed-layer LCL: 666 m above ground
0-6 km bulk shear: 21 kt
0-1 km storm-relative helicity: 70 m²/s²
0-3 km storm-relative helicity: 85 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

As transmitted.

580 
WWUS81 KPHI 012227
SPSPHI

Special Weather Statement
National Weather Service Mount Holly NJ
627 PM EDT SAT JUL 1 2017

DEZ002-003-MDZ020-012300-
Inland Sussex-Kent-Caroline-
627 PM EDT SAT JUL 1 2017

...A LINE OF STRONG THUNDERSTORMS WILL AFFECT WESTERN SUSSEX...
SOUTHEASTERN KENT AND SOUTHEASTERN CAROLINE COUNTIES...

At 627 PM EDT, radar indicated strong thunderstorms were located
along a line extending from near Bowers to Federalsburg. Movement was
east at 25 mph.

Winds up to 40 mph are possible with these storms.

Locations impacted include...
Dover, Georgetown, Milford, Seaford, Laurel, Harrington,
Federalsburg, Milton, Bridgeville, Ellendale, Bowers, Smithville,
Rising Sun-Lebanon, Dover Base Housing, Andrewsville, Rising Sun,
Sycamore, Big Stone Beach, Felton and Blades.

LAT...LON 3859 7571 3865 7571 3869 7577 3868 7580
      3869 7580 3870 7583 3915 7547 3915 7541
      3907 7541 3901 7533 3898 7531 3893 7532
      3884 7522 3853 7548
TIME...MOT...LOC 2227Z 277DEG 20KT 3909 7544 3869 7577 

$$

SFJ

The office that day

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

Issued	Product	Office	Counties	Lasted
Jun 30, 9:48 PM EDT	Special Weather Statement	PHI	Middlesex	42 min
Jun 30, 9:55 PM EDT	Special Weather Statement	PHI	Middlesex	20 min
Jun 30, 10:32 PM EDT	Special Weather Statement	PHI	Middlesex	28 min
Jul 1, 9:48 AM EDT	Marine Dense Fog Advisory	PHI		5 hr
Jul 1, 4:24 PM EDT	Severe Thunderstorm Warning	PHI	Hunterdon, Warren	51 min
Jul 1, 5:00 PM EDT	Areal Flood Advisory	PHI	Hunterdon, Warren	4 hr
Jul 1, 5:01 PM EDT	Severe Thunderstorm Warning	PHI	Camden, Gloucester, Salem	44 min
Jul 1, 5:08 PM EDT	Severe Thunderstorm Warning	PHI	Hunterdon, Mercer, Morris, Somerset, Warren	52 min
Jul 1, 5:10 PM EDT	Special Marine Warning	PHI		95 min
Jul 1, 5:29 PM EDT	Special Weather Statement	PHI	Sussex	31 min
Jul 1, 5:30 PM EDT	Areal Flood Advisory	PHI	Burlington, Camden, Gloucester	4 hr
Jul 1, 5:35 PM EDT	Severe Thunderstorm Warning	PHI	Burlington, Camden, Gloucester, Mercer, Salem	40 min
Jul 1, 5:41 PM EDT	Special Weather Statement	PHI	Atlantic, Cape May, Cumberland, Salem	34 min
Jul 1, 5:50 PM EDT	Severe Thunderstorm Warning	PHI	Hunterdon, Mercer, Middlesex, Morris, Somerset, Sussex and 1 more	40 min
Jul 1, 6:07 PM EDT	Special Weather Statement	PHI	Burlington, Camden, Gloucester, Mercer	23 min
Jul 1, 6:17 PM EDT	Areal Flood Advisory	PHI	Hunterdon, Morris, Somerset, Sussex, Warren	4 hr
Jul 1, 6:22 PM EDT	Special Weather Statement	PHI	Middlesex, Monmouth, Morris	23 min
Jul 1, 6:33 PM EDT	Special Weather Statement	PHI	Burlington, Camden, Cumberland, Gloucester	27 min
Jul 1, 6:59 PM EDT	Special Marine Warning	PHI		61 min
Jul 1, 7:01 PM EDT	Special Weather Statement	PHI	Atlantic, Burlington, Ocean	29 min
Jun 30, 8:09 PM EDT	Special Weather Statement	PHI	Montgomery	51 min
Jun 30, 8:32 PM EDT	Areal Flood Advisory	PHI	Berks, Bucks, Lehigh, Montgomery	118 min
Jun 30, 9:17 PM EDT	Special Weather Statement	PHI	Bucks	43 min
Jul 1, 2:38 PM EDT	Special Weather Statement	PHI	Berks	52 min
Jul 1, 3:22 PM EDT	Special Weather Statement	PHI	Berks, Carbon	23 min
Jul 1, 3:24 PM EDT	Areal Flood Advisory	PHI	Berks, Lehigh	3 hr
Jul 1, 3:41 PM EDT	Severe Thunderstorm Warning	PHI	Berks, Lehigh, Northampton	49 min
Jul 1, 4:05 PM EDT	Special Weather Statement	PHI	Chester	40 min
Jul 1, 4:20 PM EDT	Flash Flood Warning	PHI	Berks, Lehigh	4 hr
Jul 1, 4:12 PM EDT	Special Weather Statement	PHI	Cecil, Kent, Queen Anne's, Talbot	33 min
Jul 1, 4:38 PM EDT	Severe Thunderstorm Warning	PHI	Cecil, Kent, Queen Anne's	67 min
Jul 1, 5:03 PM EDT	Special Weather Statement	PHI	Queen Anne's, Talbot	27 min
Jul 1, 5:20 PM EDT	Areal Flood Advisory	PHI	Cecil, Kent, Queen Anne's	4 hr
Jul 1, 5:39 PM EDT	Severe Thunderstorm Warning	PHI	Caroline, Queen Anne's, Talbot	51 min

Nearby

Special Weather Statements in Delaware, 2017 Every 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.