Alert archive / Pennsylvania / Special Weather Statements in 2021

Special Weather Statement, NWS Philadelphia/Mount Holly

August 27, 2021Northampton County, Pennsylvania

NWS Philadelphia/Mount Holly issued this special weather statement at Aug 27, 2021, 2:12 PM EDT for Northampton County, Pennsylvania. It was in force for 33 min. 2 reports came from inside the area while it was in force.

The area

The outline as issued, with what was reported inside it.

The facts

Issued
Aug 27, 2021, 2:12 PM EDT (18:12 UTC)
Expired
Aug 27, 2021, 2:45 PM EDT
In force
33 min
Issued by
NWS Philadelphia/Mount Holly
Hail
0.00 in
Wind
40

County Northampton County, PA

The radar

The Philadelphia radar (KDIX), 125 km from the middle of the area, began a volume at 18:13 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.

What was reported inside it

TimeReportWhereRemark
Aug 27, 2:26 PM EDTTSTM WND DMG1 Se Kresgeville, PADOWNED TREE IN WIRES ON MOLASSES VALLEY ROAD. TIME ESTIMATED FROM RADAR.
Aug 27, 2:34 PM EDTTSTM WND DMG2 Ssw Gilbert, PADOWNED TREE LIMBS AND WIRES NEAR BLACKBERRY LANE. TIME ESTIMATED FROM RADAR.

Local storm reports filed while the alert was in force, from inside its polygon or its counties.

The nearest sounding before it

Brookhaven, NY (KOKX), launched 12:00Z, 6.2 hours before the alert went out and 206 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, Brookhaven, NY at 12:00Z on 2021-08-27Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 1159 joules per kilogram.LCLLFCEL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Brookhaven, NY at 12:00Z on 2021-08-27The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 19 square meters per square second.1939Sfc1 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
1159 J/kg
Mixed-layer CIN
-60 J/kg
Mixed-layer LCL
1043 m above ground
0-6 km bulk shear
17 kt
0-1 km storm-relative helicity
19 m²/s²
0-3 km storm-relative helicity
22 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

Open this sounding in Storm Lab

The text

As transmitted.

494 
WWUS81 KPHI 271812
SPSPHI

Special Weather Statement
National Weather Service Mount Holly NJ
212 PM EDT Fri Aug 27 2021
 
PAZ055-062-271845-
Monroe PA-Northampton PA-
212 PM EDT Fri Aug 27 2021

...A strong thunderstorm will impact portions of southwestern Monroe
and northeastern Northampton Counties through 245 PM EDT...

At 212 PM EDT, Doppler radar was tracking a strong thunderstorm over
Rossland, or 13 miles northwest of Easton. This storm was nearly
stationary.

HAZARD...Wind gusts up to 40 mph.

SOURCE...Radar indicated.

IMPACT...Gusty winds could knock down tree limbs and blow around 
         unsecured objects.

Locations impacted include...
Nazareth, Bangor, Pen Argyl, Wind Gap, Belfast, Tatamy, East Bangor,
Delaware Water Gap, Stormville, Brodheadsville, Kunkletown,
Saylorsburg, Gilbert, Rossland, Roseto, Stockertown, Effort,
Fiddletown and Eastlawn Gardens.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

If outdoors, consider seeking shelter inside a building. 

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

Frequent cloud to ground lightning is occurring with this storm.
Lightning can strike 10 miles away from a thunderstorm. Seek a safe
shelter inside a building or vehicle.

&&

LAT...LON 4072 7524 4082 7548 4095 7550 4096 7513
TIME...MOT...LOC 1812Z 289DEG 2KT 4085 7535 

MAX HAIL SIZE...0.00 IN
MAX WIND GUST...40 MPH

$$

Gorse

The office that day

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

IssuedProductOfficeCountiesLasted
Aug 27, 1:33 PM EDTAreal Flood AdvisoryPHIBurlington, Camden83 min
Aug 27, 2:18 PM EDTSmall Craft AdvisoryPHI44 hr
Aug 27, 2:28 PM EDTSpecial Weather StatementPHIAtlantic47 min
Aug 27, 2:33 PM EDTAreal Flood AdvisoryPHIWarren109 min
Aug 27, 2:37 PM EDTSevere Thunderstorm WarningPHIOcean38 min
Aug 27, 2:38 PM EDTSevere Thunderstorm WarningPHIWarren35 min
Aug 27, 2:59 PM EDTSevere Thunderstorm WarningPHIOcean46 min
Aug 27, 3:07 PM EDTSevere Thunderstorm WarningPHIWarren24 min
Aug 27, 3:16 PM EDTSpecial Weather StatementPHIBurlington44 min
Aug 27, 3:30 PM EDTSevere Thunderstorm WarningPHIBurlington, Ocean45 min
Aug 27, 3:38 PM EDTSpecial Weather StatementPHICamden52 min
Aug 27, 3:45 PM EDTSpecial Weather StatementPHIOcean30 min
Aug 27, 3:54 PM EDTSpecial Weather StatementPHIAtlantic51 min
Aug 27, 3:59 PM EDTSpecial Weather StatementPHIOcean46 min
Aug 27, 4:06 PM EDTSevere Thunderstorm WarningPHICamden, Gloucester39 min
Aug 27, 4:37 PM EDTAreal Flood AdvisoryPHIGloucester106 min
Aug 27, 4:46 PM EDTSpecial Marine WarningPHI43 min
Aug 27, 4:56 PM EDTSpecial Weather StatementPHIAtlantic34 min
Aug 27, 5:02 PM EDTSevere Thunderstorm WarningPHIAtlantic, Cumberland29 min
Aug 27, 5:09 PM EDTAreal Flood AdvisoryPHIAtlantic, Cape May, Cumberland2 hr
Aug 27, 5:21 PM EDTSpecial Weather StatementPHIMiddlesex39 min
Aug 27, 5:29 PM EDTAreal Flood AdvisoryPHIHunterdon, Mercer, Middlesex, Monmouth, Somerset3 hr
Aug 27, 5:44 PM EDTFlash Flood WarningPHIMiddlesex4 hr
Aug 27, 6:52 PM EDTAreal Flood AdvisoryPHISalem98 min
Aug 27, 1:20 PM EDTAreal Flood AdvisoryPHICarbon, Monroe2 hr
Aug 27, 1:36 PM EDTSpecial Weather StatementPHIMonroe24 min
Aug 27, 1:52 PM EDTSevere Thunderstorm WarningPHIChester53 min
Aug 27, 2:18 PM EDTAreal Flood AdvisoryPHIChester93 min
Aug 27, 2:32 PM EDTSevere Thunderstorm WarningPHICarbon, Monroe, Northampton28 min
Aug 27, 2:42 PM EDTSevere Thunderstorm WarningPHIChester14 min
Aug 27, 3:44 PM EDTSpecial Weather StatementPHIDelaware31 min
Aug 27, 6:29 PM EDTAreal Flood AdvisoryPHIBerks3 hr
Aug 27, 6:41 PM EDTSpecial Weather StatementPHIBerks34 min
Aug 27, 7:17 PM EDTFlash Flood WarningPHIBerks3 hr
Aug 27, 3:48 PM EDTAreal Flood AdvisoryPHINew Castle102 min
Aug 27, 5:11 PM EDTAreal Flood AdvisoryPHINew Castle3 hr
Aug 27, 5:39 PM EDTSpecial Weather StatementPHINew Castle36 min
Aug 27, 6:10 PM EDTAreal Flood AdvisoryPHINew Castle2 hr
Aug 27, 7:10 PM EDTSevere Thunderstorm WarningPHIKent, Queen Anne's, Talbot65 min
Aug 27, 7:37 PM EDTSevere Thunderstorm WarningPHIKent, Queen Anne's34 min

Nearby

Special Weather Statements in Pennsylvania, 2021Every special weather statement in 2021

Sources

The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.