Alert archive / Maryland / Special Weather Statements in 2013

Special Weather Statement, NWS Philadelphia/Mount Holly

August 1, 2013Queen Anne's County, Maryland

NWS Philadelphia/Mount Holly issued this special weather statement at Aug 1, 2013, 11:01 PM EDT for Queen Anne's County, Maryland. It was in force for 59 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 1, 2013, 11:01 PM EDT (03:01 UTC)
Expired
Aug 2, 2013, 12:00 AM EDT
In force
59 min
Issued by
NWS Philadelphia/Mount Holly

County Queen Anne's County, MD

The radar

The Dover AFB radar (KDOX), 69 km from the middle of the area, began a volume at 03:04 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 00:00Z, 3.0 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-pSkew-T log-p diagram, Washington/Dulle, VA at 00:00Z on 2013-08-02Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 0 joules per kilogram.LCL10008507005003002001001 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, Washington/Dulle, VA at 00:00Z on 2013-08-02The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 21 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
0 J/kg
Mixed-layer CIN
No buoyant parcel
Mixed-layer LCL
0 m above ground
0-6 km bulk shear
19 kt
0-1 km storm-relative helicity
21 m²/s²
0-3 km storm-relative helicity
31 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.

681 
WWUS81 KPHI 020301
SPSPHI

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE MOUNT HOLLY NJ
1101 PM EDT THU AUG 1 2013

MDZ015-019-020400-
QUEEN ANNE'S MD-TALBOT MD-
1101 PM EDT THU AUG 1 2013

...A STRONG THUNDERSTORM WILL AFFECT NORTH CENTRAL TALBOT AND SOUTH
CENTRAL QUEEN ANNE'S COUNTIES...

AT 1100 PM EDT...A STRONG THUNDERSTORM WAS 15 MILES EAST OF
ANNAPOLIS...MOVING SOUTHEAST AT 15 MPH.

WIND GUSTS TO 40 MPH AND PENNY SIZE HAIL ARE POSSIBLE WITH THIS
STORM. THIS STORM WILL BE NEAR GRASONVILLE AROUND 1110 PM...
GRASONVILLE AROUND 1120 PM...WYE MILLS AROUND 1130 PM AND SKIPTON
AROUND 1150 PM.

IF YOU SEE THREATENING WEATHER AND ARE OUTDOORS, PLEASE SEEK SHELTER
IN A PERMANENT STRUCTURE.

LAT...LON 3902 7633 3903 7630 3899 7627 3898 7621
      3900 7618 3904 7620 3905 7620 3894 7595
      3881 7615 3889 7621 3892 7622 3893 7625

$$

The office that day

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

IssuedProductOfficeCountiesLasted
Aug 1, 11:06 PM EDTSpecial Weather StatementPHIKent54 min
Aug 1, 8:54 PM EDTSpecial Weather StatementPHIKent66 min
Aug 1, 9:23 PM EDTAreal Flood AdvisoryPHIKent3 hr
Aug 1, 9:53 PM EDTSevere Thunderstorm WarningPHIKent, Queen Anne's67 min
Aug 1, 10:24 PM EDTAreal Flood AdvisoryPHIQueen Anne's3 hr

Nearby

Special Weather Statements in Maryland, 2013Every special weather statement in 2013

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.