Alert archive / Maryland / Special Weather Statements in 2021

Special Weather Statement, NWS Philadelphia/Mount Holly

July 29, 2021Queen Anne's County, Maryland

NWS Philadelphia/Mount Holly issued this special weather statement at Jul 29, 2021, 5:59 PM EDT for Queen Anne's County, Maryland. It was in force for 31 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 29, 2021, 5:59 PM EDT (21:59 UTC)
Expired: Jul 29, 2021, 6:30 PM EDT
In force: 31 min
Issued by: NWS Philadelphia/Mount Holly

County Queen Anne's County, MD

The radar

The Dover AFB radar (KDOX), 75 km from the middle of the area, began a volume at 22:00 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, 10.0 hours before the alert went out and 96 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: 269 J/kg
Mixed-layer CIN: -91 J/kg
Mixed-layer LCL: 893 m above ground
0-6 km bulk shear: 39 kt
0-1 km storm-relative helicity: 62 m²/s²
0-3 km storm-relative helicity: 62 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.2

Open this sounding in Storm Lab

The text

As transmitted.

942 
WWUS81 KPHI 292159
SPSPHI

Special Weather Statement
National Weather Service Mount Holly NJ
559 PM EDT Thu Jul 29 2021

MDZ015-292230-
Queen Anne's-
559 PM EDT Thu Jul 29 2021

...A STRONG THUNDERSTORM WILL AFFECT SOUTHWESTERN QUEEN ANNE'S
COUNTY...

At 559 PM EDT, a strong thunderstorm was located over Severn River,
moving southeast at 30 mph.

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

Locations impacted include...
Romancoke, Chester, Stevensville, Grasonville and Stevensville South.

A Tornado Watch remains in effect until 900 PM EDT for northeastern
Maryland.

LAT...LON 3895 7636 3904 7631 3898 7628 3897 7622
      3899 7615 3893 7621 3896 7625 3890 7625
      3894 7628 3893 7630 3890 7628 3891 7631
      3896 7631 3891 7632 3891 7634 3886 7633
      3884 7637 3884 7638
TIME...MOT...LOC 2159Z 304DEG 27KT 3898 7641 

$$

Staarmann

The office that day

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

Issued	Product	Office	Counties	Lasted
Jul 29, 3:33 AM EDT	Small Craft Advisory	PHI		20 hr
Jul 29, 1:33 PM EDT	Special Marine Warning	PHI		42 min
Jul 29, 2:53 PM EDT	Special Marine Warning	PHI		100 min
Jul 29, 4:26 PM EDT	Special Weather Statement	PHI	Morris	34 min
Jul 29, 4:30 PM EDT	Severe Thunderstorm Warning	PHI	Hunterdon, Warren	45 min
Jul 29, 4:57 PM EDT	Areal Flood Advisory	PHI	Hunterdon, Morris, Sussex, Warren	3 hr
Jul 29, 5:01 PM EDT	Special Weather Statement	PHI	Morris	29 min
Jul 29, 5:03 PM EDT	Severe Thunderstorm Warning	PHI	Hunterdon, Morris, Somerset, Sussex, Warren	42 min
Jul 29, 5:08 PM EDT	Tornado Warning	PHI	Hunterdon	37 min
Jul 29, 5:27 PM EDT	Areal Flood Advisory	PHI	Hunterdon, Mercer, Morris, Somerset	3 hr
Jul 29, 5:32 PM EDT	Flash Flood Warning	PHI	Warren	2 hr
Jul 29, 5:32 PM EDT	Tornado Warning	PHI	Hunterdon	28 min
Jul 29, 5:51 PM EDT	Tornado Warning Tornado observedConsiderable damage threat	PHI	Hunterdon, Mercer	24 min
Jul 29, 5:58 PM EDT	Flash Flood Warning	PHI	Hunterdon, Mercer, Somerset	3 hr
Jul 29, 6:06 PM EDT	Tornado Warning Considerable damage threat	PHI	Burlington, Hunterdon, Mercer, Middlesex, Monmouth	39 min
Jul 29, 6:44 PM EDT	Tornado Warning	PHI	Mercer, Monmouth, Ocean	46 min
Jul 29, 6:45 PM EDT	Severe Thunderstorm Warning	PHI	Burlington, Mercer	45 min
Jul 29, 6:56 PM EDT	Flash Flood Warning	PHI	Mercer, Middlesex, Monmouth, Ocean, Somerset	4 hr
Jul 29, 7:07 PM EDT	Tornado Warning	PHI	Burlington	23 min
Jul 29, 7:12 PM EDT	Flash Flood Warning	PHI	Burlington	4 hr
Jul 29, 7:18 PM EDT	Tornado Warning	PHI	Mercer, Middlesex, Monmouth, Ocean	27 min
Jul 29, 7:25 PM EDT	Severe Thunderstorm Warning	PHI	Burlington, Monmouth, Ocean	50 min
Jul 29, 7:28 PM EDT	Severe Thunderstorm Warning	PHI	Burlington, Mercer, Middlesex, Monmouth, Ocean	47 min
Jul 29, 7:52 PM EDT	Special Marine Warning	PHI		113 min
Jul 29, 3:48 PM EDT	Severe Thunderstorm Warning	PHI	Berks, Lehigh, Northampton	42 min
Jul 29, 4:03 PM EDT	Tornado Warning	PHI	Berks, Lehigh, Northampton	27 min
Jul 29, 4:27 PM EDT	Tornado Warning	PHI	Lehigh, Northampton	16 min
Jul 29, 4:46 PM EDT	Areal Flood Advisory	PHI	Berks, Lehigh, Northampton	3 hr
Jul 29, 4:56 PM EDT	Tornado Warning	PHI	Bucks, Lehigh, Northampton	34 min
Jul 29, 6:21 PM EDT	Special Weather Statement	PHI	Bucks	24 min
Jul 29, 1:37 PM EDT	Special Weather Statement	PHI	Sussex	38 min
Jul 29, 2:38 PM EDT	Special Weather Statement	PHI	Sussex	37 min
Jul 29, 2:43 PM EDT	Severe Thunderstorm Warning	PHI	Sussex	62 min
Jul 29, 3:02 PM EDT	Tornado Warning	PHI	Sussex	43 min
Jul 29, 11:35 AM EDT	Special Weather Statement	PHI	Talbot	55 min
Jul 29, 11:48 AM EDT	Severe Thunderstorm Warning	PHI	Caroline, Talbot	45 min
Jul 29, 12:12 PM EDT	Areal Flood Advisory	PHI	Caroline, Talbot	84 min

Nearby

Special Weather Statements in Maryland, 2021 Every 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.