Alert archive / Maryland / Special Weather Statements in 2021

Special Weather Statement, NWS Philadelphia/Mount Holly

May 4, 2021Talbot County, Maryland

NWS Philadelphia/Mount Holly issued this special weather statement at May 4, 2021, 6:50 PM EDT for Talbot County, Maryland. It was in force for 40 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
May 4, 2021, 6:50 PM EDT (22:50 UTC)
Expired
May 4, 2021, 7:30 PM EDT
In force
40 min
Issued by
NWS Philadelphia/Mount Holly

County Talbot County, MD

The radar

The Dover AFB radar (KDOX), 62 km from the middle of the area, began a volume at 22:53 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, 10.8 hours before the alert went out and 108 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 2021-05-04Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 60 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 2021-05-04The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 46 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
60 J/kg
Mixed-layer CIN
-270 J/kg
Mixed-layer LCL
1140 m above ground
0-6 km bulk shear
40 kt
0-1 km storm-relative helicity
46 m²/s²
0-3 km storm-relative helicity
96 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

Open this sounding in Storm Lab

The text

As transmitted.

435 
WWUS81 KPHI 042250
SPSPHI

Special Weather Statement
National Weather Service Mount Holly NJ
650 PM EDT Tue May 4 2021

MDZ019-020-042330-
Talbot-Caroline-
650 PM EDT Tue May 4 2021

...A LINE OF STRONG THUNDERSTORMS WILL AFFECT CENTRAL TALBOT AND
SOUTHERN CAROLINE COUNTIES...

At 650 PM EDT, radar indicated strong thunderstorms were located
along a line extending from near Tilghman Island to near University
Of Maryland Center For Environmental Studies. Movement was east at 55
mph.

Wind gusts up to 50 mph and half inch hail are possible with these
storms.

Locations impacted include...
Easton, Federalsburg, Trappe, Preston, Oxford, Tanyard, Harmony,
Smithville, Agner, Matthews, Choptank, Hambleton and Windyhill.

If outdoors, consider seeking shelter inside a building.

LAT...LON 3875 7634 3873 7630 3875 7630 3877 7625
      3873 7624 3878 7623 3888 7573 3865 7572
      3869 7577 3870 7590 3866 7596 3860 7599
      3857 7604 3869 7619 3867 7620 3871 7622
      3870 7623 3873 7632 3867 7634 3868 7635
TIME...MOT...LOC 2250Z 248DEG 46KT 3868 7633 3852 7616 

$$

JEO

The office that day

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

IssuedProductOfficeCountiesLasted
May 4, 7:54 PM EDTSpecial Marine WarningPHI51 min
May 4, 7:04 PM EDTSevere Thunderstorm WarningPHIKent, Sussex41 min
May 4, 7:38 PM EDTSevere Thunderstorm WarningPHIKent, Sussex31 min
May 4, 7:43 PM EDTSpecial Weather StatementPHISussex47 min
May 4, 5:54 PM EDTSevere Thunderstorm WarningPHIQueen Anne's, Talbot51 min

Nearby

Special Weather Statements in Maryland, 2021Every special weather statement in 2021

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.