Alert archive / Maryland / Special Weather Statements in 2010

Special Weather Statement, NWS Philadelphia/Mount Holly

July 18, 20104 counties in Maryland

NWS Philadelphia/Mount Holly issued this special weather statement at Jul 18, 2010, 11:12 PM EDT for 4 counties in Maryland. It was in force for 93 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 18, 2010, 11:12 PM EDT (03:12 UTC)
Expired: Jul 19, 2010, 12:45 AM EDT
In force: 93 min
Issued by: NWS Philadelphia/Mount Holly

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

The radar

The Dover AFB radar (KDOX), 66 km from the middle of the area, began a volume at 03:13 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, 3.2 hours before the alert went out and 104 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: 1149 J/kg
Mixed-layer CIN: -12 J/kg
Mixed-layer LCL: 1685 m above ground
0-6 km bulk shear: 18 kt
0-1 km storm-relative helicity: 36 m²/s²
0-3 km storm-relative helicity: 97 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 1.9

Open this sounding in Storm Lab

The text

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

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What forecasters said that day

The local office's own words before this special weather statement went out, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.

NWS Philadelphia/Mount Holly wrote its last area forecast discussion before this special weather statement went out at Jul 18, 8:00 PM EDT, 3 hours 12 minutes earlier.

Area forecast discussion, Jul 18, 8:00 PM EDT, 3 hours 12 minutes before

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        The site you requested is temporarily down for maintenance or an unexpected outage.
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Hazardous weather outlook, Jul 18, 8:06 PM EDT, 3 hours 6 minutes before

HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE MOUNT HOLLY NJ
806 PM EDT SUN JUL 18 2010

DEZ001>004-MDZ008-012-015-019-020-NJZ001-007>010-012>027-PAZ054-055-
060>062-067>071-192100-
NEW CASTLE-KENT-INLAND SUSSEX-DELAWARE BEACHES-CECIL-KENT MD-
QUEEN ANNES-TALBOT-CAROLINE-SUSSEX-WARREN-MORRIS-HUNTERDON-SOMERSET-
MIDDLESEX-WESTERN MONMOUTH-EASTERN MONMOUTH-MERCER-SALEM-GLOUCESTER-
CAMDEN-NORTHWESTERN BURLINGTON-OCEAN-CUMBERLAND-ATLANTIC-CAPE MAY-
ATLANTIC COASTAL CAPE MAY-COASTAL ATLANTIC-COASTAL OCEAN-
SOUTHEASTERN BURLINGTON-CARBON-MONROE-BERKS-LEHIGH-NORTHAMPTON-
CHESTER-MONTGOMERY-BUCKS-DELAWARE-PHILADELPHIA-
806 PM EDT SUN JUL 18 2010

THIS HAZARDOUS WEATHER OUTLOOK IS FOR CENTRAL DELAWARE...NORTHERN
DELAWARE...SOUTHERN DELAWARE...NORTHEAST MARYLAND...CENTRAL NEW
JERSEY...NORTHERN NEW JERSEY...NORTHWEST NEW JERSEY...SOUTHERN NEW
JERSEY...EAST CENTRAL PENNSYLVANIA...NORTHEAST PENNSYLVANIA AND
SOUTHEAST PENNSYLVANIA.

.DAY ONE...TONIGHT.

HAZARDOUS WEATHER IS NOT EXPECTED AT THIS TIME.

.DAYS TWO THROUGH SEVEN...MONDAY THROUGH SATURDAY.

THUNDERSTORMS ON MONDAY MAY BE ACCOMPANIED BY GUSTY WINDS AND
HAIL, ALONG WITH DANGEROUS CLOUD TO GROUND LIGHTNING AND HEAVY
RAIN.

.SPOTTER INFORMATION STATEMENT...

SPOTTER ACTIVATION MAY BE NEEDED ON MONDAY.

ANZ430-431-450>455-192100-
DELAWARE BAY WATERS NORTH OF EAST POINT NJ TO SLAUGHTER BEACH DE-
DELAWARE BAY WATERS SOUTH OF EAST POINT NJ TO SLAUGHTER BEACH DE-
COASTAL WATERS FROM SANDY HOOK TO MANASQUAN INLET NJ OUT 20 NM-
COASTAL WATERS FROM MANASQUAN INLET TO LITTLE EGG INLET NJ OUT 20 NM-
COASTAL WATERS FROM LITTLE EGG INLET TO GREAT EGG INLET NJ OUT 20 NM-
COASTAL WATERS FROM GREAT EGG INLET TO CAPE MAY NJ OUT 20 NM-
COASTAL WATERS FROM CAPE MAY NJ TO CAPE HENLOPEN DE OUT 20 NM-
COASTAL WATERS FROM CAPE HENLOPEN TO FENWICK ISLAND DE OUT 20 NM-
806 PM EDT SUN JUL 18 2010

THIS HAZARDOUS WEATHER OUTLOOK IS FOR ATLANTIC COASTAL WATERS AND
DELAWARE BAY WATERS.

.DAY ONE...TONIGHT.

HAZARDOUS WEATHER IS NOT EXPECTED AT THIS TIME.

.DAYS TWO THROUGH SEVEN...MONDAY THROUGH SATURDAY.

THUNDERSTORMS ON MONDAY MAY BE ACCOMPANIED BY GUSTY WINDS AND
HAIL, ALONG WITH DANGEROUS CLOUD TO SURFACE LIGHTNING AND HEAVY
RAIN.

.SPOTTER INFORMATION STATEMENT...

SPOTTER ACTIVATION MAY BE NEEDED ON MONDAY.

In the hours before

Special weather statement, Jul 18, 11:12 PM EDT, 0 minutes before

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE MOUNT HOLLY NJ
1112 PM EDT SUN JUL 18 2010

MDZ008-012-015-019-020-190445-
CAROLINE MD-CECIL MD-KENT MD-QUEEN ANNE'S MD-TALBOT MD-
1112 PM EDT SUN JUL 18 2010

...STRONG THUNDERSTORMS WILL AFFECT PARTS OF CAROLINE...CECIL...
KENT...QUEEN ANNE'S AND TALBOT COUNTIES...

AT 1108 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED AN
AREA OF STRONG THUNDERSTORMS...THE LEADING EDGE OF WHICH WAS FROM
ABOUT 10 MILES SOUTHWEST OF BALTIMORE TO ABOUT 40 MILES SOUTH OF
BALTIMORE...MOVING EAST AT 25 MPH. THE THUNDERSTORMS WILL BE NEAR
CHESTER...STEVENSVILLE SOUTH AROUND 1145 PM...TILGHMAN
ISLAND...TALBOT AROUND MIDNIGHT...WYE MILLS...STARR AROUND 1215
AM...NEWTOWN...STARKEY CORNER AROUND 1230 AM...AND MORGNEC AND
GREENSBORO AROUND 1245 AM.

WIND GUSTS TO 40 MPH...SMALL HAIL AND DANGEROUS CLOUD TO GROUND
LIGHTNING ARE POSSIBLE WITH THESE STORMS.

LAT...LON 3873 7625 3867 7636 3877 7640 3875 7635
      3887 7626 3882 7621 3884 7620 3894 7624
      3884 7638 3894 7637 3905 7631 3900 7627
      3900 7618 3916 7628 3934 7618 3943 7578
      3866 7573 3869 7590 3856 7605

MPD

The office that day

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

Issued	Product	Office	Counties	Lasted
Jul 19, 6:58 AM EDT	Special Weather Statement	PHI	Morris, Sussex, Warren	62 min
Jul 19, 7:20 AM EDT	Special Weather Statement	PHI	Morris	55 min
Jul 19, 8:47 AM EDT	Special Weather Statement	PHI	Camden	58 min
Jul 19, 9:07 AM EDT	Severe Thunderstorm Warning	PHI	Burlington, Camden, Gloucester	53 min
Jul 19, 9:44 AM EDT	Special Weather Statement	PHI	Burlington, Ocean	61 min
Jul 19, 10:05 AM EDT	Special Weather Statement	PHI	Camden, Gloucester	55 min
Jul 19, 10:15 AM EDT	Special Weather Statement	PHI	Monmouth	60 min
Jul 19, 10:18 AM EDT	Special Marine Warning	PHI		57 min
Jul 19, 10:20 AM EDT	Special Weather Statement	PHI	Atlantic, Camden, Cumberland	55 min
Jul 19, 10:40 AM EDT	Severe Thunderstorm Warning	PHI	Monmouth	21 min
Jul 19, 10:43 AM EDT	Special Marine Warning	PHI		32 min
Jul 19, 4:42 PM EDT	Special Weather Statement	PHI	Sussex	48 min
Jul 19, 4:58 PM EDT	Severe Thunderstorm Warning	PHI	Sussex	28 min
Jul 19, 5:24 PM EDT	Special Weather Statement	PHI	Warren	51 min
Jul 19, 6:20 PM EDT	Special Weather Statement	PHI	Morris	40 min
Jul 19, 6:22 PM EDT	Severe Thunderstorm Warning	PHI	Camden, Gloucester, Salem	53 min
Jul 19, 6:52 PM EDT	Special Weather Statement	PHI	Salem	68 min
Jul 19, 7:40 PM EDT	Special Weather Statement	PHI	Burlington, Camden	65 min
Jul 19, 5:15 AM EDT	Special Weather Statement	PHI	Berks	60 min
Jul 19, 6:04 AM EDT	Special Weather Statement	PHI	Berks, Carbon, Lehigh, Monroe, Montgomery, Northampton	56 min
Jul 19, 7:46 AM EDT	Special Weather Statement	PHI	Bucks, Chester, Delaware, Montgomery, Philadelphia	59 min
Jul 19, 8:19 AM EDT	Special Weather Statement	PHI	Montgomery	56 min
Jul 19, 2:09 PM EDT	Special Weather Statement	PHI	Carbon	51 min
Jul 19, 2:21 PM EDT	Severe Thunderstorm Warning	PHI	Carbon, Monroe	54 min
Jul 19, 4:24 PM EDT	Special Weather Statement	PHI	Carbon	36 min
Jul 19, 5:11 PM EDT	Special Weather Statement	PHI	Monroe	49 min
Jul 19, 5:25 PM EDT	Special Weather Statement	PHI	Chester, Delaware, Montgomery	65 min
Jul 19, 5:39 PM EDT	Severe Thunderstorm Warning	PHI	Berks, Chester	66 min
Jul 19, 6:34 PM EDT	Severe Thunderstorm Warning	PHI	Bucks, Montgomery, Philadelphia	56 min
Jul 19, 6:57 PM EDT	Special Weather Statement	PHI	Berks, Lehigh, Northampton	48 min
Jul 19, 12:00 AM EDT	Severe Thunderstorm Warning	PHI	Caroline, Cecil, Kent, Queen Anne's, Talbot	60 min
Jul 19, 9:14 AM EDT	Special Weather Statement	PHI	New Castle	61 min
Jul 19, 7:21 PM EDT	Special Weather Statement	PHI	Kent	54 min

Nearby

Special Weather Statements in Maryland, 2010 Every special weather statement in 2010

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.