Alert archive / Pennsylvania / Special Weather Statements in 2020

Special Weather Statement, NWS Philadelphia/Mount Holly

July 23, 2020Northampton County, Pennsylvania

NWS Philadelphia/Mount Holly issued this special weather statement at Jul 23, 2020, 12:58 PM EDT for Northampton County, Pennsylvania. It was in force for 32 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 23, 2020, 12:58 PM EDT (16:58 UTC)
Expired: Jul 23, 2020, 1:30 PM EDT
In force: 32 min
Issued by: NWS Philadelphia/Mount Holly

County Northampton County, PA

The radar

The Philadelphia radar (KDIX), 134 km from the middle of the area, began a volume at 17:01 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

Brookhaven, NY (KOKX), launched 12:00Z, 5.0 hours before the alert went out and 219 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: 579 J/kg
Mixed-layer CIN: -67 J/kg
Mixed-layer LCL: 990 m above ground
0-6 km bulk shear: 30 kt
0-1 km storm-relative helicity: 37 m²/s²
0-3 km storm-relative helicity: 66 m²/s²
Significant tornado parameter: 0.1
Supercell composite: 0.3

Open this sounding in Storm Lab

The text

As transmitted.

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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 23, 9:54 AM EDT, 3 hours 4 minutes earlier.

Area forecast discussion, Jul 23, 9:54 AM EDT, 3 hours 4 minutes before

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Hazardous weather outlook, Jul 23, 4:04 AM EDT, 8 hours 54 minutes before

Hazardous Weather Outlook
National Weather Service Mount Holly NJ
404 AM EDT Thu Jul 23 2020

DEZ001>003-MDZ008-012-015-019-020-NJZ001-007>010-012-013-015>023-027-
PAZ054-055-060>062-070-071-101>106-240815-
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-
Delaware-Philadelphia-Western Chester-Eastern Chester-
Western Montgomery-Eastern Montgomery-Upper Bucks-Lower Bucks-
404 AM EDT Thu Jul 23 2020

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.

Thunderstorms this afternoon and evening may be accompanied by
damaging wind gusts, frequent cloud to ground lightning and locally
heavy rainfall.

.DAYS TWO THROUGH SEVEN...Friday through Wednesday.

There is a low probability for widespread hazardous weather.

.SPOTTER INFORMATION STATEMENT...

Spotter activation may be needed. Please relay any information about
observed severe weather to the NWS while following all local, state,
and CDC guidelines.

DEZ004-NJZ014-024>026-240815-
Delaware Beaches-Eastern Monmouth-Atlantic Coastal Cape May-
Coastal Atlantic-Coastal Ocean-
404 AM EDT Thu Jul 23 2020

This Hazardous Weather Outlook is for southern Delaware, central
New Jersey and southern New Jersey.

.DAY ONE...Today and tonight.

Thunderstorms this afternoon and evening may be accompanied by
damaging wind gusts, frequent cloud to ground lightning and locally
heavy rainfall.

.DAYS TWO THROUGH SEVEN...Friday through Wednesday.

There is a low probability for widespread hazardous weather.

.SPOTTER INFORMATION STATEMENT...

Spotter activation may be needed. Please relay any information about
observed severe weather to the NWS while following all local, state,
and CDC guidelines.

ANZ430-431-450>455-240815-
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-
404 AM EDT Thu Jul 23 2020

This Hazardous Weather Outlook is for Atlantic coastal waters and
Delaware Bay Waters.

.DAY ONE...Today and tonight.

Thunderstorms this afternoon and evening may be accompanied by wind
gusts in excess of 35 knots and frequent cloud to surface lightning.

.DAYS TWO THROUGH SEVEN...Friday through Wednesday.

There is a low probability for widespread hazardous weather.

.SPOTTER INFORMATION STATEMENT...

Spotter activation may be needed. Please relay any information about
observed severe weather to the NWS while following all local, state,
and CDC guidelines.

In the hours before

Special weather statement, Jul 23, 9:32 AM EDT, 3 hours 26 minutes before

Special Weather Statement
National Weather Service Mount Holly NJ
932 AM EDT Thu Jul 23 2020

NJZ013-015-019-020-PAZ106-231400-
Northwestern Burlington-Ocean-Western Monmouth-Mercer-Lower Bucks-
932 AM EDT Thu Jul 23 2020

...A STRONG THUNDERSTORM WILL AFFECT NORTHWESTERN OCEAN...
SOUTHEASTERN MERCER...NORTHWESTERN BURLINGTON...SOUTHWESTERN MONMOUTH
AND SOUTHEASTERN BUCKS COUNTIES...

At 932 AM EDT, a strong thunderstorm was located over Burlington, or
11 miles south of Trenton, moving northeast at 40 mph.

Wind gusts up to 40 mph are possible with this storm.

Locations impacted include...
Trenton, Willingboro, Lumberton, Florence, Burlington, Bristol, Mount
Holly, Bordentown, Beverly, Tullytown, Allentown, Wrightstown,
Windsor, Florence-Roebling, Jacksonville, Georgetown, Edinburg,
Crosswicks, White Horse and Imlaystown.

This includes the following highways...
 New Jersey Turnpike between exits 5 and 8.
 Pennsylvania Turnpike between mile markers 356 and 359.
 Interstate 95 in Pennsylvania between mile markers 35 and 40.
 Interstate 195 in New Jersey between mile markers 0 and 13.
 Interstate 295 in New Jersey between mile markers 41 and 64.

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

LAT...LON 3994 7489 4008 7497 4009 7496 4030 7461
      4009 7441
TIME...MOT...LOC 1332Z 234DEG 34KT 4006 7482

JEO

Local storm report, Jul 23, 10:29 AM EDT, 2 hours 29 minutes before

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Local storm report, Jul 23, 10:31 AM EDT, 2 hours 27 minutes before

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Local storm report, Jul 23, 10:36 AM EDT, 2 hours 22 minutes before

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Special weather statement, Jul 23, 12:58 PM 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
Jul 22, 8:53 PM EDT	Special Marine Warning	PHI		52 min
Jul 23, 9:32 AM EDT	Special Weather Statement	PHI	Mercer	28 min
Jul 23, 5:08 PM EDT	Special Weather Statement	PHI	Warren	37 min
Jul 23, 5:14 PM EDT	Special Weather Statement	PHI	Hunterdon	31 min
Jul 23, 5:23 PM EDT	Special Weather Statement	PHI	Sussex	22 min
Jul 23, 5:48 PM EDT	Special Weather Statement	PHI	Sussex	57 min
Jul 23, 6:11 PM EDT	Special Weather Statement	PHI	Somerset	34 min
Jul 23, 6:13 PM EDT	Special Weather Statement	PHI	Hunterdon	32 min
Jul 23, 6:30 PM EDT	Special Weather Statement	PHI	Mercer	30 min
Jul 23, 6:53 PM EDT	Special Weather Statement	PHI	Mercer	37 min
Jul 23, 7:00 PM EDT	Severe Thunderstorm Warning	PHI	Mercer, Middlesex, Monmouth	30 min
Jul 23, 7:10 PM EDT	Special Weather Statement	PHI	Middlesex	35 min
Jul 23, 7:29 PM EDT	Special Weather Statement	PHI	Monmouth	31 min
Jul 23, 7:52 PM EDT	Special Weather Statement	PHI	Monmouth	38 min
Jul 23, 7:56 PM EDT	Special Marine Warning	PHI		64 min
Jul 23, 2:43 PM EDT	Areal Flood Advisory	PHI	Carbon, Monroe, Northampton	4 hr
Jul 23, 3:03 PM EDT	Special Weather Statement	PHI	Northampton	27 min
Jul 23, 4:26 PM EDT	Special Weather Statement	PHI	Lehigh	34 min
Jul 23, 7:41 PM EDT	Special Weather Statement	PHI	Montgomery	34 min

Nearby

Special Weather Statements in Pennsylvania, 2020 Every special weather statement in 2020

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.