Alert archive / Maryland / Special Weather Statements in 2010

Special Weather Statement, NWS Philadelphia/Mount Holly

September 28, 2010Caroline County, Maryland

NWS Philadelphia/Mount Holly issued this special weather statement at Sep 28, 2010, 10:41 AM EDT for Caroline County, Maryland. It was in force for 64 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: Sep 28, 2010, 10:41 AM EDT (14:41 UTC)
Expired: Sep 28, 2010, 11:45 AM EDT
In force: 64 min
Issued by: NWS Philadelphia/Mount Holly

County Caroline County, MD

The radar

The Dover AFB radar (KDOX), 36 km from the middle of the area, began a volume at 14:45 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

Phillips Aaf/Abe, MD (KAPG), launched 12:00Z, 2.7 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: 246 J/kg
Mixed-layer CIN: -26 J/kg
Mixed-layer LCL: 729 m above ground
0-6 km bulk shear: 57 kt
0-1 km storm-relative helicity: 288 m²/s²
0-3 km storm-relative helicity: 308 m²/s²
Significant tornado parameter: 0.4
Supercell composite: 1.6

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 Sep 28, 10:38 AM EDT, 3 minutes earlier.

Area forecast discussion, Sep 28, 10:38 AM EDT, 3 minutes before

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Hazardous weather outlook, Sep 28, 4:18 AM EDT, 6 hours 23 minutes before

HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE MOUNT HOLLY NJ
418 AM EDT TUE SEP 28 2010

DEZ001>003-MDZ008-012-015-019-020-NJZ001-007>010-012-013-015>023-027-
PAZ054-055-060>062-067>071-290830-
NEW CASTLE-KENT-INLAND SUSSEX-CECIL-KENT MD-QUEEN ANNES-TALBOT-
CAROLINE-SUSSEX-WARREN-MORRIS-HUNTERDON-SOMERSET-MIDDLESEX-
WESTERN MONMOUTH-MERCER-SALEM-GLOUCESTER-CAMDEN-
NORTHWESTERN BURLINGTON-OCEAN-CUMBERLAND-ATLANTIC-CAPE MAY-
SOUTHEASTERN BURLINGTON-CARBON-MONROE-BERKS-LEHIGH-NORTHAMPTON-
CHESTER-MONTGOMERY-BUCKS-DELAWARE-PHILADELPHIA-
418 AM EDT TUE SEP 28 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...TODAY AND TONIGHT.

ISOLATED SEVERE THUNDERSTORMS ARE POSSIBLE BETWEEN 6 AM AND 3 PM.
THE RISK FOR A SEVERE STORM SHOULD FIRST DEVELOP FROM EASTERN MARYLAND
NORTHWARD INTO EASTERN PENNSYLVANIA BETWEEN 6 AM AND 10 AM.

THEN THE RISK FOR SEVERE STORMS SHIFTS EASTWARD ALONG THE DELAWARE
RIVER BETWEEN 10 AM AND NOON AND ALSO INCLUDES THE STATE OF
DELAWARE.

THEN EARLY THIS AFTERNOON THE RISK FOR A SEVERE THUNDERSTORM
SHOULD BE CONFINED MOSTLY TO NEW JERSEY.

.DAYS TWO THROUGH SEVEN...WEDNESDAY THROUGH MONDAY.

THERE IS A LOW PROBABILITY OF A STRONG THUNDERSTORM THURSDAY.

THERE IS A HIGH PROBABILITY OF URBAN POOR DRAINAGE STREET FLOODING
THURSDAY. THERE IS AN OUTLOOKED LESSER CHANCE FOR POCKETS OF RIVER
AND/OR SMALL STREAM FLOODING THURSDAY...THAT IF IT DEVELOPED...COULD
LINGER INTO FRIDAY.

.SPOTTER INFORMATION STATEMENT...

SPOTTER ACTIVATION MAY BE NEEDED TODAY.

NJZ014-026-290830-
EASTERN MONMOUTH-COASTAL OCEAN-
418 AM EDT TUE SEP 28 2010

THIS HAZARDOUS WEATHER OUTLOOK IS FOR CENTRAL NEW JERSEY AND
SOUTHERN NEW JERSEY.

.DAY ONE...TODAY AND TONIGHT.

THERE IS A MODERATE RISK OF RIP CURRENTS FOR THE REST OF THIS
AFTERNOON AND EVENING.

ISOLATED SEVERE THUNDERSTORMS ARE POSSIBLE EARLY THIS AFTERNOON.

.DAYS TWO THROUGH SEVEN...WEDNESDAY THROUGH MONDAY.

THERE IS A LOW PROBABILITY OF A STRONG THUNDERSTORM THURSDAY.

THERE IA LOW PROBABILITY THAT A WIND ADVISORY MAY BE NEEDED
THURSDAY.

THERE IS A CHANCE OF POOR DRAINAGE STREET FLOODING THURSDAY.

.SPOTTER INFORMATION STATEMENT...

SPOTTER ACTIVATION MAY BE NEEDED TODAY.

DEZ004-NJZ024-025-290830-
DELAWARE BEACHES-ATLANTIC COASTAL CAPE MAY-COASTAL ATLANTIC-
418 AM EDT TUE SEP 28 2010

THIS HAZARDOUS WEATHER OUTLOOK IS FOR SOUTHERN DELAWARE AND
SOUTHERN NEW JERSEY.

.DAY ONE...TODAY AND TONIGHT.

THERE IS A MODERATE RISK OF RIP CURRENTS FOR THE REST OF THIS
AFTERNOON AND EVENING.

ISOLATED SEVERE THUNDERSTORMS ARE POSSIBLE EARLY THIS AFTERNOON.

.DAYS TWO THROUGH SEVEN...WEDNESDAY THROUGH MONDAY.

THERE IS A LOW PROBABILITY OF A STRONG THUNDERSTORM THURSDAY.

THERE IA LOW PROBABILITY THAT A WIND ADVISORY MAY BE NEEDED
THURSDAY.

THERE IS A CHANCE OF POOR DRAINAGE STREET FLOODING THURSDAY.

.SPOTTER INFORMATION STATEMENT...

SPOTTER ACTIVATION MAY BE NEEDED.

ANZ450>455-290830-
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-
418 AM EDT TUE SEP 28 2010

...SMALL CRAFT ADVISORY IN EFFECT UNTIL 6 PM EDT WEDNESDAY...

THIS HAZARDOUS WEATHER OUTLOOK IS FOR ATLANTIC COASTAL WATERS.

.DAY ONE...TODAY AND TONIGHT.

PLEASE LISTEN TO NOAA WEATHER RADIO OR GO TO WEATHER.GOV ON THE
INTERNET FOR MORE INFORMATION ABOUT THE FOLLOWING HAZARDS.

   SMALL CRAFT ADVISORY.

A GUSTY THUNDERSTORM WITH SOUTHERLY OR SOUTHWESTERLY GUSTS TO 40
KNOTS IS POSSIBLE TODAY.

.DAYS TWO THROUGH SEVEN...WEDNESDAY THROUGH MONDAY.

PLEASE LISTEN TO NOAA WEATHER RADIO OR GO TO WEATHER.GOV ON THE
INTERNET FOR MORE INFORMATION ABOUT THE FOLLOWING HAZARDS.

   SMALL CRAFT ADVISORY.

THERE IS A LOW PROBABILITY FOR GALE FORCE SOUTHERLY GUSTS THURSDAY
AS WELL AS A THUNDERSTORM.

.SPOTTER INFORMATION STATEMENT...

SPOTTER ACTIVATION MAY BE NEEDED.

ANZ430-431-290830-
DELAWARE BAY WATERS NORTH OF EAST POINT NJ TO SLAUGHTER BEACH DE-
DELAWARE BAY WATERS SOUTH OF EAST POINT NJ TO SLAUGHTER BEACH DE-
418 AM EDT TUE SEP 28 2010

...SMALL CRAFT ADVISORY IN EFFECT UNTIL 6 PM EDT THIS EVENING...

THIS HAZARDOUS WEATHER OUTLOOK IS FOR DELAWARE BAY WATERS.

.DAY ONE...TODAY AND TONIGHT.

PLEASE LISTEN TO NOAA WEATHER RADIO OR GO TO WEATHER.GOV ON THE
INTERNET FOR MORE INFORMATION ABOUT THE FOLLOWING HAZARDS.

   SMALL CRAFT ADVISORY.

A GUSTY THUNDERSTORM WITH SOUTHERLY OR SOUTHWESTERLY GUSTS TO 40
KNOTS IS POSSIBLE BETWEEN 8 AM AND 1 PM.

.DAYS TWO THROUGH SEVEN...WEDNESDAY THROUGH MONDAY.

THERE IS A LOW PROBABILITY FOR GALE FORCE SOUTHERLY GUSTS
THURSDAY AS WELL AS A THUNDERSTORM.

.SPOTTER INFORMATION STATEMENT...

SPOTTER ACTIVATION MAY BE NEEDED.

DRAG

In the hours before

Special weather statement, Sep 28, 9:26 AM EDT, 1 hour 15 minutes before

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE MOUNT HOLLY NJ
926 AM EDT TUE SEP 28 2010

DEZ001-002-MDZ008-012-015-NJZ016-PAZ060-067-068-070-281430-
BERKS PA-CECIL MD-CHESTER PA-DELAWARE PA-KENT MD-KENT DE-
MONTGOMERY PA-NEW CASTLE DE-QUEEN ANNE'S MD-SALEM NJ-
926 AM EDT TUE SEP 28 2010

...SHOWERS WITH STRONG WIND GUSTS WILL AFFECT KENT...CECIL...
SALEM...DELAWARE...CHESTER...MONTGOMERY...BERKS...QUEEN ANNE'S AND
NEW CASTLE COUNTIES...

AT 921 AM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED AN
AREA OF SHOWERS WITH STRONG WIND GUSTS 17 MILES NORTH OF
CENTERVILLE...MOVING NORTH AT 45 MPH. THE SHOWERS WILL BE NEAR
CECILTON...SASSAFRAS AROUND 935 AM...WARWICK...TOWNSEND AROUND 940
AM...CHARLESTOWN...PERRYVILLE...PORT DEPOSIT...HOLLYWOOD BEACH
AROUND 945 AM...BAY VIEW AND NORTH EAST AROUND 950 AM.

WIND GUSTS TO 50 MPH ARE POSSIBLE WITH THESE SHOWERS.

LAT...LON 3934 7618 3938 7611 3938 7607 3944 7600
      3953 7599 3954 7607 3962 7616 3987 7601
      4011 7595 4019 7580 4005 7535 3970 7551
      3962 7560 3960 7555 3929 7568 3930 7575
      3925 7577 3927 7586 3924 7592 3928 7620

HAYES

Special weather statement, Sep 28, 9:29 AM EDT, 1 hour 12 minutes before

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE MOUNT HOLLY NJ
929 AM EDT TUE SEP 28 2010

PAZ054-060-061-281430-
BERKS PA-CARBON PA-LEHIGH PA-
929 AM EDT TUE SEP 28 2010

...SHOWERS WITH STRONG WIND GUSTS WILL AFFECT BERKS...LEHIGH AND
CARBON COUNTIES...

AT 926 AM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED
SHOWERS WITH STRONG WIND GUSTS 11 MILES SOUTH OF LANCASTER...MOVING
NORTH AT 50 MPH. THE SHOWERS WILL BE NEAR NEW MORGAN AROUND 1000
AM...WERNERSVILLE...SINKING SPRING...WEST WYOMISSING...WEST LAWN
AROUND 1005 AM...WHITFIELD...WYOMISSING HILLS...WYOMISSING...WEST
READING AROUND 1010 AM AND BERNVILLE AROUND 1015 AM.

WIND GUSTS TO 50 MPH ARE POSSIBLE WITH THESE SHOWERS.

LAT...LON 4054 7619 4060 7605 4059 7603 4064 7600
      4074 7578 4079 7586 4074 7561 4072 7557
      4015 7586 4014 7590 4036 7621 4036 7624
      4038 7627

HAYES

Special weather statement, Sep 28, 9:59 AM EDT, 42 minutes before

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE MOUNT HOLLY NJ
959 AM EDT TUE SEP 28 2010

DEZ001-MDZ008-NJZ007-009-PAZ060>062-067>070-281500-
BERKS PA-BUCKS PA-CECIL MD-CHESTER PA-DELAWARE PA-HUNTERDON NJ-
LEHIGH PA-MONTGOMERY PA-NEW CASTLE DE-NORTHAMPTON PA-WARREN NJ-
959 AM EDT TUE SEP 28 2010

...SHOWERS WITH STRONG WIND GUSTS WILL AFFECT CECIL...WARREN...
HUNTERDON...DELAWARE...CHESTER...MONTGOMERY...BERKS...LEHIGH...
NORTHAMPTON...BUCKS AND NEW CASTLE COUNTIES...

AT 954 AM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED
SHOWERS WITH STRONG WIND GUSTS ALONG A LINE EXTENDING FROM 2 MILES
WEST OF NEWARK TO 15 MILES WEST OF ELKTON...MOVING NORTHEAST AT 45
MPH. THE SHOWERS WILL BE NEAR ASHLAND...MOUNT VERNON...GLEN ROY...
WEST GROVE AROUND 1005 AM...HOMEVILLE AROUND 1010 AM...WEST
GOSHEN...WESTTOWN...COCHRANVILLE...WEST CHESTER AROUND 1015 AM AND
MALVERN AROUND 1020 AM.

WIND GUSTS TO 50 MPH ARE POSSIBLE WITH THESE SHOWERS.

LAT...LON 3974 7613 3978 7607 3985 7603 3987 7601
      3990 7601 4061 7548 4065 7516 4071 7494
      3970 7570 3964 7590 3961 7615 3966 7619

HAYES

Special weather statement, Sep 28, 10:01 AM EDT, 40 minutes before

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE MOUNT HOLLY NJ
1001 AM EDT TUE SEP 28 2010

PAZ054-055-061-062-281500-
CARBON PA-LEHIGH PA-MONROE PA-NORTHAMPTON PA-
1001 AM EDT TUE SEP 28 2010

...SHOWERS WITH STRONG WIND GUSTS WILL AFFECT LEHIGH...
NORTHAMPTON...CARBON AND MONROE COUNTIES...

AT 1000 AM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED
SHOWERS WITH STRONG WIND GUSTS 16 MILES SOUTHWEST OF LEHIGHTON...
MOVING NORTHEAST AT 45 MPH. THE SHOWERS WILL BE NEAR SUMMIT HILL...
EMERALD...SLATINGTON...WALNUTPORT AROUND 1015 AM...JIM THORPE...
LEHIGHTON...WEISSPORT...WEISSPORT EAST AROUND 1020 AM...BELTZVILLE
STATE PARK AND WEATHERLY AROUND 1025 AM.

WIND GUSTS TO 50 MPH ARE POSSIBLE WITH THESE SHOWERS.

LAT...LON 4124 7513 4116 7516 4115 7509 4113 7507
      4063 7538 4084 7590 4099 7582 4101 7575
      4105 7579 4111 7576 4114 7570 4113 7564
      4123 7554 4125 7550 4126 7514

HAYES

Special weather statement, Sep 28, 10:17 AM EDT, 24 minutes before

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE MOUNT HOLLY NJ
1017 AM EDT TUE SEP 28 2010

DEZ001-002-MDZ008-012-015-PAZ067-281515-
CECIL MD-CHESTER PA-KENT MD-KENT DE-NEW CASTLE DE-QUEEN ANNE'S MD-
1017 AM EDT TUE SEP 28 2010

...A SHOWER WITH STRONG WIND GUSTS WILL AFFECT KENT...CECIL...
CHESTER...QUEEN ANNE'S AND NEW CASTLE COUNTIES...

AT 1013 AM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
SHOWER WITH STRONG WIND GUSTS 14 MILES NORTHEAST OF CENTERVILLE...
MOVING NORTH AT 50 MPH. THE SHOWER WILL BE NEAR GALENA...MASSEY...
DELANEY CORNER AROUND 1025 AM...CECILTON...SASSAFRAS AROUND 1030
AM...BOHEMIAS MILLS...WARWICK...CAYOTS...MIDDLETOWN AROUND 1035 AM
AND CHESAPEAKE CITY AROUND 1040 AM.

WIND GUSTS TO 50 MPH ARE POSSIBLE WITH THIS SHOWER.

LAT...LON 3973 7611 3987 7599 3992 7601 4003 7595
      4011 7594 4026 7566 4020 7556 4013 7551
      4007 7537 3999 7545 3987 7562 3984 7559
      3980 7542 3962 7560 3959 7559 3959 7555
      3913 7585 3920 7607 3972 7585 3973 7614

HAYES

Special weather statement, Sep 28, 10:41 AM EDT, 0 minutes before

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The office that day

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

Issued	Product	Office	Counties	Lasted
Sep 28, 12:45 AM EDT	Special Weather Statement	PHI	Mercer	30 min
Sep 28, 7:39 AM EDT	Special Weather Statement	PHI	Hunterdon, Somerset, Warren	66 min
Sep 28, 12:06 PM EDT	Special Weather Statement	PHI	Warren	54 min
Sep 28, 3:51 PM EDT	Special Weather Statement	PHI	Hunterdon, Morris, Somerset, Sussex, Warren	84 min
Sep 28, 5:05 PM EDT	Special Weather Statement	PHI	Morris, Sussex	40 min
Sep 28, 8:35 AM EDT	Special Weather Statement	PHI	Berks	55 min
Sep 28, 9:26 AM EDT	Special Weather Statement	PHI	Chester	64 min
Sep 28, 9:29 AM EDT	Special Weather Statement	PHI	Berks	61 min
Sep 28, 9:59 AM EDT	Special Weather Statement	PHI	Chester, Montgomery	61 min
Sep 28, 10:01 AM EDT	Special Weather Statement	PHI	Carbon, Monroe, Northampton	59 min
Sep 28, 10:05 AM EDT	Severe Thunderstorm Warning	PHI	Berks, Chester, Lehigh, Montgomery	55 min
Sep 28, 10:17 AM EDT	Special Weather Statement	PHI	Chester	58 min
Sep 28, 11:15 AM EDT	Severe Thunderstorm Warning	PHI	Chester, Delaware	45 min
Sep 28, 1:23 PM EDT	Special Weather Statement	PHI	Carbon, Lehigh, Monroe, Northampton	52 min
Sep 28, 6:13 AM EDT	Special Weather Statement	PHI	Cecil, Kent, Queen Anne's, Talbot	47 min
Sep 28, 7:02 AM EDT	Special Weather Statement	PHI	Caroline	58 min
Sep 28, 8:26 AM EDT	Special Weather Statement	PHI	Queen Anne's, Talbot	64 min
Sep 28, 8:47 AM EDT	Special Weather Statement	PHI	Cecil, Kent	58 min
Sep 28, 9:13 AM EDT	Tornado Warning	PHI	Caroline, Kent, Queen Anne's, Talbot	32 min
Sep 28, 9:44 AM EDT	Tornado Warning	PHI	Cecil, Kent, Queen Anne's, Talbot	31 min
Sep 28, 10:22 AM EDT	Severe Thunderstorm Warning	PHI	Cecil, Kent, Queen Anne's	53 min
Sep 28, 7:33 AM EDT	Special Weather Statement	PHI	Kent, New Castle	57 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.