Alert archive / Maryland / Special Weather Statements in 2021

Special Weather Statement, NWS Philadelphia/Mount Holly

August 22, 2021Caroline County, Queen Anne's County, Maryland

NWS Philadelphia/Mount Holly issued this special weather statement at Aug 22, 2021, 9:28 AM EDT for Caroline County, Queen Anne's County, Maryland. It was in force for 47 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 22, 2021, 9:28 AM EDT (13:28 UTC)
Expired: Aug 22, 2021, 10:15 AM EDT
In force: 47 min
Issued by: NWS Philadelphia/Mount Holly
Hail: 0.00 in
Wind: 40

Counties Caroline County, MD, Queen Anne's County, MD

The radar

The Dover AFB radar (KDOX), 50 km from the middle of the area, began a volume at 13:30 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, 1.5 hours before the alert went out and 120 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: 1445 J/kg
Mixed-layer CIN: -18 J/kg
Mixed-layer LCL: 876 m above ground
0-6 km bulk shear: 23 kt
0-1 km storm-relative helicity: -34 m²/s²
0-3 km storm-relative helicity: 8 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

As transmitted.

222 
WWUS81 KPHI 221328
SPSPHI

Special Weather Statement
National Weather Service Mount Holly NJ
928 AM EDT Sun Aug 22 2021
 
MDZ015-019-020-221415-
Queen Anne's MD-Talbot MD-Caroline MD-
928 AM EDT Sun Aug 22 2021

...A strong thunderstorm will impact portions of northeastern Talbot,
central Queen Anne's and central Caroline Counties through 1015 AM
EDT...

At 927 AM EDT, Doppler radar was tracking a strong thunderstorm over
Wye Mills, or near Centerville, moving southeast at 15 mph.

HAZARD...Wind gusts up to 40 mph.

SOURCE...Radar indicated.

IMPACT...Gusty winds could knock down tree limbs and blow around 
         unsecured objects.

Locations impacted include...
Centerville, Denton, Centreville, Greensboro, Oakland, Ridgely,
Preston, Queen Anne, Harmony, Starr, Skipton, Jumptown, Matthews, Wye
Mills, Griffin, Cordova, Carville, Hope, Queenstown and Hillsboro.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

If outdoors, consider seeking shelter inside a building. 

Torrential rainfall is also occurring with this storm and may lead to
localized flooding. Do not drive your vehicle through flooded
roadways.

&&

LAT...LON 3900 7617 3902 7618 3911 7591 3889 7574
      3869 7589 3870 7590 3869 7591 3897 7621
TIME...MOT...LOC 1327Z 313DEG 14KT 3896 7608 

MAX HAIL SIZE...0.00 IN
MAX WIND GUST...40 MPH

$$

Gorse

The office that day

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

Issued	Product	Office	Counties	Lasted
Aug 21, 9:35 PM EDT	Areal Flood Advisory	PHI	Mercer, Middlesex, Monmouth, Ocean	3 hr
Aug 21, 10:47 PM EDT	Areal Flood Advisory	PHI	Morris	3 hr
Aug 21, 11:38 PM EDT	Areal Flood Advisory	PHI	Atlantic, Burlington, Monmouth, Ocean	3 hr
Aug 22, 12:04 AM EDT	Areal Flood Advisory	PHI	Atlantic, Burlington, Camden, Monmouth, Ocean	3 hr
Aug 22, 12:24 AM EDT	Flash Flood Warning	PHI	Morris	3 hr
Aug 22, 1:30 AM EDT	Areal Flood Advisory	PHI	Middlesex, Monmouth	4 hr
Aug 22, 1:35 AM EDT	Areal Flood Advisory	PHI	Morris, Somerset	3 hr
Aug 22, 2:04 AM EDT	Flash Flood Warning	PHI	Middlesex, Monmouth	9 hr
Aug 22, 2:09 AM EDT	Flash Flood Warning	PHI	Burlington, Ocean	5 hr
Aug 22, 2:40 AM EDT	Flash Flood Warning	PHI	Hunterdon, Morris, Somerset	5 hr
Aug 22, 3:10 AM EDT	Flash Flood Warning	PHI	Burlington, Hunterdon, Mercer, Monmouth, Ocean	8 hr
Aug 22, 4:21 AM EDT	Flash Flood Warning	PHI	Monmouth, Ocean	3 hr
Aug 22, 5:36 AM EDT	Flash Flood Warning Considerable damage threat	PHI	Mercer, Middlesex, Monmouth, Somerset	5 hr
Aug 22, 6:07 AM EDT	Flash Flood Warning	PHI	Hunterdon, Warren	67 min
Aug 22, 7:52 AM EDT	Areal Flood Warning	PHI	Hunterdon, Somerset	15 hr
Aug 22, 10:43 AM EDT	Special Marine Warning	PHI		62 min
Aug 22, 10:49 AM EDT	Areal Flood Warning	PHI	Middlesex, Monmouth, Somerset	13 hr
Aug 22, 10:52 AM EDT	Areal Flood Warning	PHI	Hunterdon, Mercer, Monmouth	13 hr
Aug 22, 11:06 AM EDT	Special Marine Warning	PHI		54 min
Aug 22, 1:35 PM EDT	Coastal Flood Advisory	PHI	Cape May	10 hr
Aug 22, 1:53 PM EDT	Areal Flood Advisory	PHI	Morris	6 hr
Aug 22, 3:21 PM EDT	River Flood Warning	PHI	Somerset	54 hr
Aug 22, 5:07 PM EDT	Areal Flood Advisory	PHI	Morris, Sussex, Warren	6 hr
Aug 22, 5:48 PM EDT	Flash Flood Warning	PHI	Morris, Sussex, Warren	6 hr
Aug 21, 11:49 PM EDT	Areal Flood Advisory	PHI	Chester	3 hr
Aug 22, 6:38 PM EDT	Special Weather Statement	PHI	Monroe	37 min
Aug 22, 9:41 AM EDT	Areal Flood Advisory	PHI	Kent	2 hr
Aug 22, 9:57 AM EDT	Special Weather Statement	PHI	Kent	33 min
Aug 22, 10:24 AM EDT	Special Weather Statement	PHI	Kent	51 min
Aug 22, 10:37 AM EDT	Special Weather Statement	PHI	Sussex	53 min
Aug 22, 10:52 AM EDT	Special Weather Statement	PHI	Sussex	38 min
Aug 22, 10:01 AM EDT	Special Weather Statement	PHI	Caroline	44 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.