Alert archive / Maryland / Special Weather Statements in 2018

Special Weather Statement, NWS Philadelphia/Mount Holly

August 2, 2018Queen Anne's County, Maryland

NWS Philadelphia/Mount Holly issued this special weather statement at Aug 2, 2018, 4:37 PM EDT for Queen Anne's County, Maryland. It was in force for 23 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 2, 2018, 4:37 PM EDT (20:37 UTC)
Expired: Aug 2, 2018, 5:00 PM EDT
In force: 23 min
Issued by: NWS Philadelphia/Mount Holly

County Queen Anne's County, MD

The radar

The Dover AFB radar (KDOX), 70 km from the middle of the area, began a volume at 20:38 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 12:00Z, 8.6 hours before the alert went out and 102 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-p

Temperature in red, dew point in green, the mixed-layer parcel dashed.

Hodograph

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: 98 J/kg
Mixed-layer CIN: -90 J/kg
Mixed-layer LCL: 727 m above ground
0-6 km bulk shear: 47 kt
0-1 km storm-relative helicity: -23 m²/s²
0-3 km storm-relative helicity: 13 m²/s²
Significant tornado parameter: -0.0
Supercell composite: -0.0

Open this sounding in Storm Lab

The text

As transmitted.

647 
WWUS81 KPHI 022037
SPSPHI

Special Weather Statement
National Weather Service Mount Holly NJ
437 PM EDT THU AUG 2 2018

MDZ012-015-022100-
Queen Anne's-Kent-
437 PM EDT THU AUG 2 2018

...A STRONG THUNDERSTORM WILL AFFECT CENTRAL QUEEN ANNE'S AND
SOUTHWESTERN KENT COUNTIES...

At 436 PM EDT, a strong thunderstorm was located over Stevensville,
or 8 miles southeast of Gibson Island, moving northeast at 35 mph.

Winds up to 50 mph are possible with this storm.

Locations impacted include...
Centerville, Chestertown, Centreville, Rock Hall, Church Hill, Old
Town, Grasonville, Stevensville, Langford, Chester, Overton, Starkey
Corner, Morgnec, Carville, Hope, Queenstown, Stevensville South,
Kingstown and Dominion.

Heavy rainfall is also occurring with this storm, and may cause 
localized flooding. Do not drive your vehicle through flooded 
roadways.

LAT...LON 3904 7631 3898 7628 3897 7622 3900 7617
      3903 7624 3909 7623 3915 7626 3927 7599
      3905 7587 3902 7589 3893 7621 3896 7625
      3892 7625 3894 7628 3891 7630 3896 7631
      3891 7632 3892 7634 3895 7636
TIME...MOT...LOC 2036Z 244DEG 30KT 3903 7629 

$$

Kruzdlo

The office that day

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

Issued	Product	Office	Counties	Lasted
Aug 1, 10:40 PM EDT	Severe Thunderstorm Warning	PHI	Hunterdon, Warren	37 min
Aug 1, 11:35 PM EDT	Severe Thunderstorm Warning	PHI	Salem	20 min
Aug 2, 3:31 AM EDT	Flash Flood Watch	PHI	Morris, Sussex, Warren	55 hr
Aug 2, 1:41 PM EDT	Special Weather Statement	PHI	Burlington	34 min
Aug 2, 2:09 PM EDT	Special Weather Statement	PHI	Monmouth	36 min
Aug 2, 3:41 PM EDT	Special Weather Statement	PHI	Morris	34 min
Aug 2, 6:02 PM EDT	Special Marine Warning	PHI		58 min
Aug 1, 8:59 PM EDT	Special Weather Statement	PHI	Berks	61 min
Aug 1, 9:54 PM EDT	Special Weather Statement	PHI	Berks, Carbon, Lehigh	66 min
Aug 2, 1:50 PM EDT	Special Weather Statement	PHI	Lehigh	25 min
Aug 2, 2:19 PM EDT	Special Weather Statement	PHI	Northampton	41 min
Aug 1, 10:58 PM EDT	Severe Thunderstorm Warning	PHI	New Castle	47 min
Aug 2, 5:36 PM EDT	Special Weather Statement	PHI	New Castle	24 min
Aug 2, 5:40 PM EDT	Special Weather Statement	PHI	Kent	35 min
Aug 2, 5:03 PM EDT	Special Weather Statement	PHI	Kent	27 min
Aug 2, 5:34 PM EDT	Special Weather Statement	PHI	Queen Anne's	26 min
Aug 2, 6:07 PM EDT	Special Weather Statement	PHI	Kent, Queen Anne's	38 min

Nearby

Special Weather Statements in Maryland, 2018 Every special weather statement in 2018

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.