Alert archive / Maryland / Special Weather Statements in 2020

Special Weather Statement, NWS Philadelphia/Mount Holly

July 21, 2020Kent County, Maryland

NWS Philadelphia/Mount Holly issued this special weather statement at Jul 21, 2020, 9:16 PM EDT for Kent County, Maryland. It was in force for 29 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 21, 2020, 9:16 PM EDT (01:16 UTC)
Expired
Jul 21, 2020, 9:45 PM EDT
In force
29 min
Issued by
NWS Philadelphia/Mount Holly

County Kent County, MD

The radar

The Dover AFB radar (KDOX), 76 km from the middle of the area, began a volume at 01:14 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

Washington/Dulle, VA (KIAD), launched 00:00Z, 1.3 hours before the alert went out and 109 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, Washington/Dulle, VA at 00:00Z on 2020-07-22Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 581 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, Washington/Dulle, VA at 00:00Z on 2020-07-22The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 40 square meters per square second.1939Sfc1 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
581 J/kg
Mixed-layer CIN
-35 J/kg
Mixed-layer LCL
2012 m above ground
0-6 km bulk shear
24 kt
0-1 km storm-relative helicity
40 m²/s²
0-3 km storm-relative helicity
87 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.7

Open this sounding in Storm Lab

The text

As transmitted.

629 
WWUS81 KPHI 220116
SPSPHI

Special Weather Statement
National Weather Service Mount Holly NJ
916 PM EDT Tue Jul 21 2020

MDZ012-015-220145-
Queen Anne's-Kent-
916 PM EDT Tue Jul 21 2020

...A STRONG THUNDERSTORM WILL AFFECT NORTHEASTERN QUEEN ANNE'S AND
WESTERN KENT COUNTIES...

At 915 PM EDT, a strong thunderstorm was located over Rock Hall, or 9
miles east of Bodkin Point, moving east at 25 mph.

Wind gusts up to 40 mph are possible with this storm.

Locations impacted include...
Chestertown, Centreville, Rock Hall, Church Hill, Newtown, Starkey
Corner, Morgnec, Old Town, Kennedyville, Langford and Kingstown.

Frequent cloud to ground lightning is occurring with this storm.
Lightning can strike 10 miles away from a thunderstorm. Seek a safe
shelter inside a building or vehicle.

LAT...LON 3928 7620 3929 7617 3930 7617 3936 7602
      3906 7588 3904 7624 3909 7623 3912 7625
      3913 7625 3915 7628 3917 7628
TIME...MOT...LOC 0115Z 251DEG 22KT 3913 7626 

$$

Gorse

The office that day

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

IssuedProductOfficeCountiesLasted
Jul 21, 10:57 PM EDTSpecial Marine WarningPHI63 min
Jul 22, 2:10 PM EDTSevere Thunderstorm WarningPHIWarren50 min
Jul 22, 3:04 PM EDTSevere Thunderstorm WarningPHISussex30 min
Jul 22, 3:18 PM EDTSpecial Weather StatementPHIMorris, Warren42 min
Jul 22, 3:50 PM EDTSevere Thunderstorm WarningPHIHunterdon, Morris, Sussex, Warren29 min
Jul 22, 4:33 PM EDTSpecial Weather StatementPHIMorris57 min
Jul 22, 4:56 PM EDTSevere Thunderstorm WarningPHIHunterdon, Morris, Somerset49 min
Jul 22, 5:16 PM EDTSevere Thunderstorm WarningPHIHunterdon, Morris, Sussex, Warren59 min
Jul 22, 5:23 PM EDTAreal Flood AdvisoryPHIWarren3 hr
Jul 22, 5:33 PM EDTSevere Thunderstorm WarningPHIGloucester57 min
Jul 22, 5:40 PM EDTSevere Thunderstorm WarningPHIBurlington, Hunterdon, Mercer, Somerset65 min
Jul 22, 5:49 PM EDTSpecial Marine WarningPHI86 min
Jul 22, 5:54 PM EDTSevere Thunderstorm WarningPHIGloucester, Salem51 min
Jul 22, 6:04 PM EDTSevere Thunderstorm WarningPHIHunterdon, Middlesex, Morris, Somerset, Sussex, Warren60 min
Jul 22, 6:12 PM EDTSevere Thunderstorm WarningPHIBurlington, Camden, Gloucester, Salem48 min
Jul 22, 6:17 PM EDTSevere Thunderstorm WarningPHIBurlington, Mercer, Middlesex, Monmouth, Ocean, Somerset52 min
Jul 22, 6:46 PM EDTSevere Thunderstorm WarningPHIAtlantic, Camden, Cape May, Cumberland, Gloucester, Salem44 min
Jul 22, 6:47 PM EDTSpecial Marine WarningPHI28 min
Jul 22, 6:52 PM EDTAreal Flood AdvisoryPHIMiddlesex, Somerset113 min
Jul 22, 6:52 PM EDTSpecial Marine WarningPHI41 min
Jul 22, 7:20 PM EDTSpecial Marine WarningPHI55 min
Jul 22, 7:23 PM EDTSevere Thunderstorm WarningPHIAtlantic, Burlington, Camden, Cape May, Cumberland, Gloucester and 1 more52 min
Jul 22, 7:58 PM EDTSevere Thunderstorm WarningPHIAtlantic, Burlington, Camden, Ocean47 min
Jul 22, 7:59 PM EDTSpecial Marine WarningPHI61 min
Jul 21, 8:45 PM EDTSpecial Weather StatementPHIBerks30 min
Jul 21, 9:20 PM EDTSpecial Weather StatementPHIMontgomery25 min
Jul 22, 1:36 PM EDTSpecial Weather StatementPHICarbon24 min
Jul 22, 1:58 PM EDTSpecial Weather StatementPHIMonroe32 min
Jul 22, 3:29 PM EDTSpecial Weather StatementPHILebanon46 min
Jul 22, 3:39 PM EDTSevere Thunderstorm WarningPHIBerks51 min
Jul 22, 4:01 PM EDTSevere Thunderstorm WarningPHIChester22 min
Jul 22, 4:10 PM EDTSevere Thunderstorm WarningPHIBerks, Carbon, Lehigh, Northampton65 min
Jul 22, 4:25 PM EDTSevere Thunderstorm WarningPHIBerks, Bucks, Chester, Lehigh, Montgomery50 min
Jul 22, 4:38 PM EDTSevere Thunderstorm WarningPHIChester52 min
Jul 22, 4:49 PM EDTSevere Thunderstorm WarningPHIBerks, Bucks, Carbon, Lehigh, Monroe, Northampton56 min
Jul 22, 5:09 PM EDTSevere Thunderstorm WarningPHIBerks, Bucks, Chester, Delaware, Lehigh, Montgomery and 1 more66 min
Jul 21, 10:14 PM EDTSpecial Weather StatementPHIKent46 min
Jul 21, 10:21 PM EDTSevere Thunderstorm WarningPHIKent54 min
Jul 22, 5:23 PM EDTSevere Thunderstorm WarningPHIKent, Sussex52 min
Jul 21, 9:25 PM EDTSpecial Weather StatementPHITalbot35 min
Jul 21, 9:39 PM EDTSevere Thunderstorm WarningPHICaroline, Talbot51 min
Jul 21, 9:46 PM EDTSpecial Weather StatementPHIKent, Queen Anne's29 min
Jul 22, 4:47 PM EDTSevere Thunderstorm WarningPHICaroline, Queen Anne's, Talbot43 min
Jul 22, 5:13 PM EDTSevere Thunderstorm WarningPHICecil, Kent, Queen Anne's47 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.