Alert archive / Delaware / Special Weather Statements in 2019

Special Weather Statement, NWS Philadelphia/Mount Holly

April 19, 2019Kent County, Sussex County, Delaware

NWS Philadelphia/Mount Holly issued this special weather statement at Apr 19, 2019, 7:21 PM EDT for Kent County, Sussex County, Delaware. It was in force for 24 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
Apr 19, 2019, 7:21 PM EDT (23:21 UTC)
Expired
Apr 19, 2019, 7:45 PM EDT
In force
24 min
Issued by
NWS Philadelphia/Mount Holly

Counties Kent County, DE, Sussex County, DE

The radar

The Dover AFB radar (KDOX), 19 km from the middle of the area, began a volume at 23:22 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, 11.4 hours before the alert went out and 94 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-pSkew-T log-p diagram, Wallops Is Stn, VA at 12:00Z on 2019-04-19Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 0 joules per kilogram.LCL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°0°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Wallops Is Stn, VA at 12:00Z on 2019-04-19The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 178 square meters per square second.19395878Sfc1 km3 km6 km9 kmRMLM
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
0 J/kg
Mixed-layer CIN
No buoyant parcel
Mixed-layer LCL
967 m above ground
0-6 km bulk shear
34 kt
0-1 km storm-relative helicity
178 m²/s²
0-3 km storm-relative helicity
202 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

Open this sounding in Storm Lab

The text

As transmitted.

931 
WWUS81 KPHI 192321
SPSPHI

Special Weather Statement
National Weather Service Mount Holly NJ
721 PM EDT FRI APR 19 2019

DEZ002>004-192345-
Inland Sussex-Kent-Delaware Beaches-
721 PM EDT FRI APR 19 2019

...A SHOWER WILL AFFECT CENTRAL SUSSEX AND EASTERN KENT COUNTIES...

At 720 PM EDT, a shower was located near Ellendale, or near
Georgetown, moving north at 55 mph.

Winds up to 40 mph are possible with this shower.

Locations impacted include...
Dover, Georgetown, Milford, Seaford, Millsboro, Harrington, Lewes,
Milton, Bridgeville, Ellendale, Bowers, Henlopen Acres, Rising
Sun-Lebanon, Cape Henlopen State Park, Dover Base Housing, Rising
Sun, Sycamore, Long Neck, Blades and Frederica.

LAT...LON 3861 7563 3927 7547 3921 7539 3907 7541
      3899 7532 3891 7531 3880 7518 3879 7510
      3880 7509 3869 7507 3868 7507 3869 7508
      3869 7514 3864 7513 3863 7510 3861 7513
      3859 7521 3857 7518 3859 7513 3855 7516
TIME...MOT...LOC 2320Z 194DEG 49KT 3876 7546 

$$

CMS

The office that day

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

IssuedProductOfficeCountiesLasted
Apr 19, 3:49 PM EDTCoastal Flood AdvisoryPHIBurlington, Camden, Gloucester, Mercer12 hr

Nearby

Special Weather Statements in Delaware, 2019Every special weather statement in 2019

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.