Alert archive / Maryland / Special Weather Statements in 2012

Special Weather Statement, NWS Philadelphia/Mount Holly

August 5, 2012Queen Anne's County, Maryland

NWS Philadelphia/Mount Holly issued this special weather statement at Aug 5, 2012, 7:52 PM EDT for Queen Anne's County, Maryland. It was in force for 68 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 5, 2012, 7:52 PM EDT (23:52 UTC)
Expired: Aug 5, 2012, 9:00 PM EDT
In force: 68 min
Issued by: NWS Philadelphia/Mount Holly

County Queen Anne's County, MD

The radar

The Dover AFB radar (KDOX), 64 km from the middle of the area, began a volume at 23:53 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

Washington/Dulle, VA (KIAD), launched 12:00Z, 11.9 hours before the alert went out and 107 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: 809 J/kg
Mixed-layer CIN: -82 J/kg
Mixed-layer LCL: 1048 m above ground
0-6 km bulk shear: 5 kt
0-1 km storm-relative helicity: 48 m²/s²
0-3 km storm-relative helicity: 57 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

As transmitted, in the capitals the NWS used until 2016.

636 
WWUS81 KPHI 052352
SPSPHI

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE MOUNT HOLLY NJ
752 PM EDT SUN AUG 5 2012

DEZ002-MDZ015-019-020-060100-
CAROLINE MD-KENT DE-QUEEN ANNE'S MD-TALBOT MD-
752 PM EDT SUN AUG 5 2012

...A STRONG THUNDERSTORM WILL AFFECT CAROLINE...KENT...QUEEN ANNE'S
AND TALBOT COUNTIES...

AT 749 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
STRONG THUNDERSTORM 12 MILES NORTHWEST OF EASTON...MOVING EAST AT 25
MPH. THE THUNDERSTORM WILL BE NEAR WYE MILLS...SKIPTON AROUND 800
PM...STARR...JUMPTOWN AROUND 815 PM...OAKLAND...OAKLAND AROUND 830
PM...GOLDSBORO...SANDTOWN AROUND 845 PM AND HARTLY AROUND 900 PM.

VERY HEAVY RAIN WILL FALL FROM THIS STORM...AND WILL CAUSE WATER TO
POND ON ROADS AND QUICKLY FILL POOR DRAINAGE AREAS.

WIND GUSTS TO 40 MPH ARE POSSIBLE WITH THIS STORM.

LAT...LON 3899 7629 3898 7620 3900 7618 3903 7619
      3920 7573 3893 7557 3879 7623 3886 7627
      3886 7624 3884 7625 3881 7621 3893 7622
      3894 7624 3891 7624 3890 7626

$$

FORECASTER: HEAVENER

The office that day

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

Issued	Product	Office	Counties	Lasted
Aug 5, 3:49 AM EDT	Flash Flood Watch	PHI	Hunterdon, Middlesex, Morris, Somerset, Sussex, Warren	16 hr
Aug 5, 1:00 PM EDT	Special Weather Statement	PHI	Warren	30 min
Aug 5, 1:20 PM EDT	Special Weather Statement	PHI	Sussex	85 min
Aug 5, 5:13 PM EDT	Severe Thunderstorm Warning	PHI	Morris, Sussex, Warren	77 min
Aug 5, 5:22 PM EDT	Severe Thunderstorm Warning	PHI	Gloucester, Hunterdon, Salem, Warren	68 min
Aug 5, 5:38 PM EDT	Severe Thunderstorm Warning	PHI	Gloucester, Salem	82 min
Aug 5, 5:52 PM EDT	Special Marine Warning	PHI		83 min
Aug 5, 6:16 PM EDT	Severe Thunderstorm Warning	PHI	Burlington, Camden, Gloucester, Hunterdon, Mercer, Middlesex and 3 more	74 min
Aug 5, 6:21 PM EDT	Severe Thunderstorm Warning	PHI	Cumberland, Salem	39 min
Aug 5, 7:09 PM EDT	Special Weather Statement	PHI	Atlantic, Cumberland	66 min
Aug 5, 7:30 PM EDT	Special Weather Statement	PHI	Atlantic, Cumberland, Monmouth, Ocean	60 min
Aug 5, 7:38 PM EDT	Severe Thunderstorm Warning	PHI	Middlesex, Monmouth, Ocean	67 min
Aug 5, 7:40 PM EDT	Special Marine Warning	PHI		95 min
Aug 5, 12:15 PM EDT	Special Weather Statement	PHI	Carbon, Monroe	45 min
Aug 5, 12:29 PM EDT	Special Weather Statement	PHI	Northampton	31 min
Aug 5, 1:03 PM EDT	Special Weather Statement	PHI	Monroe	27 min
Aug 5, 4:12 PM EDT	Severe Thunderstorm Warning	PHI	Berks, Carbon, Lehigh, Monroe, Northampton	78 min
Aug 5, 4:23 PM EDT	Severe Thunderstorm Warning	PHI	Berks, Chester, Montgomery	67 min
Aug 5, 4:40 PM EDT	Special Weather Statement	PHI	Cecil	95 min
Aug 5, 4:54 PM EDT	Severe Thunderstorm Warning	PHI	Cecil	51 min
Aug 5, 5:10 PM EDT	Severe Thunderstorm Warning	PHI	Caroline, Cecil, Kent, Queen Anne's, Talbot	80 min

Nearby

Special Weather Statements in Maryland, 2012 Every special weather statement in 2012

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.