Alert archive / Maryland / Special Weather Statements in 2020

Special Weather Statement, NWS Philadelphia/Mount Holly

April 7, 2020Caroline County, Maryland

NWS Philadelphia/Mount Holly issued this special weather statement at Apr 7, 2020, 11:21 PM EDT for Caroline County, Maryland. It was in force for 39 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 7, 2020, 11:21 PM EDT (03:21 UTC)
Expired
Apr 8, 2020, 12:00 AM EDT
In force
39 min
Issued by
NWS Philadelphia/Mount Holly

County Caroline County, MD

The radar

The Dover AFB radar (KDOX), 37 km from the middle of the area, began a volume at 03:21 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 00:00Z, 3.4 hours before the alert went out and 89 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 00:00Z on 2020-04-08Temperature 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 00:00Z on 2020-04-08The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 6 square meters per square second.1939587897Sfc1 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
1245 m above ground
0-6 km bulk shear
43 kt
0-1 km storm-relative helicity
6 m²/s²
0-3 km storm-relative helicity
118 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

Open this sounding in Storm Lab

The text

As transmitted.

714 
WWUS81 KPHI 080321
SPSPHI

Special Weather Statement
National Weather Service Mount Holly NJ
1121 PM EDT Tue Apr 7 2020

DEZ003-MDZ019-020-080400-
Inland Sussex-Talbot-Caroline-
1121 PM EDT Tue Apr 7 2020

...A STRONG THUNDERSTORM WILL AFFECT WEST CENTRAL SUSSEX...EASTERN
TALBOT AND SOUTHERN CAROLINE COUNTIES...

At 1121 PM EDT, a strong thunderstorm was located over Tanyard, or
near Easton, moving east at 50 mph.

Half inch hail is possible with this storm.

Locations impacted include...
Easton, Seaford, Federalsburg, Bridgeville, Trappe, Preston, Tanyard,
Harmony, Smithville, Agner, Matthews, Choptank, Hambleton, Windyhill,
Cordova, Blades, Greenwood and Bethel.

LAT...LON 3852 7570 3864 7571 3869 7577 3868 7580
      3870 7580 3871 7584 3868 7593 3863 7598
      3868 7612 3887 7610 3878 7538 3850 7565
TIME...MOT...LOC 0321Z 279DEG 45KT 3876 7600 

$$

NC

The office that day

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

IssuedProductOfficeCountiesLasted
Apr 7, 9:30 PM EDTCoastal Flood AdvisoryPHIAtlantic, Burlington, Camden, Cape May, Cumberland, Gloucester and 4 more33 hr
Apr 8, 2:30 AM EDTSevere Thunderstorm WarningPHICamden, Gloucester30 min
Apr 8, 2:35 AM EDTSpecial Weather StatementPHICamden25 min
Apr 8, 2:40 AM EDTSpecial Weather StatementPHIHunterdon35 min
Apr 8, 2:51 AM EDTSpecial Weather StatementPHICumberland24 min
Apr 8, 2:58 AM EDTSpecial Weather StatementPHIBurlington32 min
Apr 8, 3:13 AM EDTSpecial Weather StatementPHIHunterdon, Mercer, Middlesex32 min
Apr 8, 3:25 AM EDTSpecial Weather StatementPHIBurlington, Ocean35 min
Apr 8, 3:50 AM EDTGale WatchPHI24 hr
Apr 8, 4:21 AM EDTSpecial Weather StatementPHICumberland39 min
Apr 8, 4:52 AM EDTSpecial Marine WarningPHI83 min
Apr 8, 4:56 AM EDTSpecial Weather StatementPHIAtlantic, Cape May, Cumberland64 min
Apr 8, 3:24 PM EDTGale WarningPHI58 hr
Apr 8, 7:19 PM EDTWind AdvisoryPHIAtlantic, Burlington, Camden, Cape May, Cumberland, Gloucester and 10 more24 hr
Apr 8, 1:53 AM EDTSpecial Weather StatementPHICarbon, Lehigh, Northampton37 min
Apr 8, 1:55 AM EDTSpecial Weather StatementPHIChester, Delaware50 min
Apr 8, 1:59 AM EDTSpecial Weather StatementPHIBerks46 min
Apr 7, 11:10 PM EDTSpecial Weather StatementPHISussex35 min
Apr 7, 11:48 PM EDTSevere Thunderstorm WarningPHISussex27 min
Apr 8, 12:53 AM EDTSpecial Weather StatementPHIKent52 min
Apr 8, 1:06 AM EDTSpecial Weather StatementPHINew Castle39 min
Apr 8, 12:09 AM EDTSpecial Weather StatementPHIKent, Queen Anne's51 min

Nearby

Special Weather Statements in Maryland, 2020Every 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.