Alert archive / Maryland / Special Weather Statements in 2019

Special Weather Statement, NWS Philadelphia/Mount Holly

August 9, 2019Wicomico County, Maryland

NWS Philadelphia/Mount Holly issued this special weather statement at Aug 9, 2019, 3:28 PM EDT for Wicomico County, Maryland. It was in force for 47 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
Aug 9, 2019, 3:28 PM EDT (19:28 UTC)
Expired
Aug 9, 2019, 4:15 PM EDT
In force
47 min
Issued by
NWS Philadelphia/Mount Holly

County Wicomico County, MD

The radar

The Dover AFB radar (KDOX), 39 km from the middle of the area, began a volume at 19:28 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, 7.5 hours before the alert went out and 66 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 2019-08-09Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 592 joules per kilogram.LCLLFCEL10008507005003002001001 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 2019-08-09The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity -53 square meters per square second.193958Sfc1 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
592 J/kg
Mixed-layer CIN
-118 J/kg
Mixed-layer LCL
1427 m above ground
0-6 km bulk shear
28 kt
0-1 km storm-relative helicity
-53 m²/s²
0-3 km storm-relative helicity
15 m²/s²
Significant tornado parameter
-0.0
Supercell composite
-0.2

Open this sounding in Storm Lab

The text

As transmitted.

653 
WWUS81 KPHI 091928
SPSPHI

Special Weather Statement
National Weather Service Mount Holly NJ
328 PM EDT Fri Aug 9 2019

DEZ003-092015-
Inland Sussex-
328 PM EDT Fri Aug 9 2019

...A STRONG THUNDERSTORM WILL AFFECT SOUTHWESTERN SUSSEX COUNTY...

At 328 PM EDT, a strong thunderstorm was located near Vienna, or near
Hurlock, moving southeast at 20 mph.

Wind gusts up to 40 mph and pea size hail are possible with this
storm.

Locations impacted include...
Laurel, Delmar and Bethel. 

If outdoors, consider seeking shelter inside a building.

LAT...LON 3846 7560 3846 7569 3860 7570 3858 7549
      3845 7556
TIME...MOT...LOC 1928Z 292DEG 16KT 3855 7584 

$$

MPS

The office that day

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

IssuedProductOfficeCountiesLasted
Aug 9, 2:34 PM EDTSpecial Weather StatementPHIHunterdon26 min
Aug 9, 3:36 PM EDTSpecial Weather StatementPHICumberland24 min
Aug 9, 3:58 PM EDTSpecial Weather StatementPHIAtlantic32 min
Aug 9, 4:12 PM EDTSevere Thunderstorm WarningPHIAtlantic, Cape May, Cumberland33 min
Aug 9, 2:38 PM EDTSpecial Weather StatementPHITalbot37 min
Aug 9, 5:04 PM EDTSpecial Weather StatementPHIWicomico11 min
Aug 9, 5:16 PM EDTSpecial Weather StatementPHIWicomico29 min

Nearby

Special Weather Statements in Maryland, 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.