Alert archive / Pennsylvania / Severe Thunderstorm Warnings in 2021

Severe Thunderstorm Warning 267, NWS Philadelphia/Mount Holly

August 26, 2021Monroe County, Pennsylvania

NWS Philadelphia/Mount Holly issued this severe thunderstorm warning at Aug 26, 2021, 1:20 PM EDT for Monroe County, Pennsylvania. It was in force for 40 min. 1 report 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 26, 2021, 1:20 PM EDT (17:20 UTC)
Expired: Aug 26, 2021, 2:00 PM EDT
In force: 40 min
Issued by: NWS Philadelphia/Mount Holly
Area: Storm-based polygon
Hail: 0.75 in
Wind: 60.0 mph

County Monroe County, PA

The radar

The Binghamton radar (KBGM), 133 km from the middle of the area, began a volume at 17:21 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

Time	Report	Where	Remark
Aug 26, 1:23 PM EDT	TSTM WND DMG	Mountainhome, PA	TREES DOWN IN BARRETT TOWNSHIP INCLUDING ON GRABLE ROAD AND PLAYHOUSE ROAD. 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, 5.3 hours before the alert went out and 198 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: 844 J/kg
Mixed-layer CIN: -55 J/kg
Mixed-layer LCL: 1230 m above ground
0-6 km bulk shear: 9 kt
0-1 km storm-relative helicity: -16 m²/s²
0-3 km storm-relative helicity: 11 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

As transmitted.

521 
WUUS51 KPHI 261720
SVRPHI
PAC089-261800-
/O.NEW.KPHI.SV.W.0267.210826T1720Z-210826T1800Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Mount Holly NJ
120 PM EDT Thu Aug 26 2021

The National Weather Service in Mount Holly NJ has issued a

* Severe Thunderstorm Warning for...
  Northern Monroe County in northeastern Pennsylvania...

* Until 200 PM EDT.

* At 119 PM EDT, a severe thunderstorm was located over Paradise
  Valley, or near Mount Pocono, moving south at 10 mph.

  HAZARD...60 mph wind gusts and penny size hail.

  SOURCE...Radar indicated.

  IMPACT...Damage to roofs, siding, trees, and power lines is 
           possible.

* Locations impacted include...
  Mount Pocono, Tobyhanna, Reeders, Henryville, Pocono Pines,
  Analomink, Skytop, McMichael, Tannersville, Mountainhome,
  Canadensis, Alpine Mountain, Scotrun, Long Pond, Paradise Valley,
  Brodheadsville, Cresco, Bartonsville and Arlington Heights.

This includes the following highways...
 Interstate 80 in Pennsylvania between mile markers 292 and 306.
 Interstate 380 in Pennsylvania between mile markers 0 and 7.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

For your protection move to an interior room on the lowest floor of a
building.

&&

LAT...LON 4124 7513 4115 7515 4114 7509 4113 7506
      4109 7505 4093 7541 4113 7554 4125 7527
      4125 7513
TIME...MOT...LOC 1719Z 347DEG 10KT 4113 7526 

HAIL THREAT...RADAR INDICATED
MAX HAIL SIZE...0.75 IN
WIND THREAT...RADAR INDICATED
MAX WIND GUST...60 MPH

$$

Davis

1 follow-up statement

041 
WWUS51 KPHI 261750
SVSPHI

Severe Weather Statement
National Weather Service Mount Holly NJ
150 PM EDT Thu Aug 26 2021

PAC089-261800-
/O.EXP.KPHI.SV.W.0267.000000T0000Z-210826T1800Z/
Monroe PA-
150 PM EDT Thu Aug 26 2021

...THE SEVERE THUNDERSTORM WARNING FOR NORTHERN MONROE COUNTY WILL
EXPIRE AT 200 PM EDT...
                
The storm which prompted the warning has weakened below severe
limits, and no longer poses an immediate threat to life or property.
Therefore, the warning will be allowed to expire.

LAT...LON 4124 7513 4115 7515 4114 7509 4113 7506
      4109 7505 4093 7541 4113 7554 4125 7527
      4125 7513
TIME...MOT...LOC 1750Z 347DEG 10KT 4105 7524 

$$

Davis

The office that day

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

Issued	Product	Office	Counties	Lasted
Aug 26, 3:30 PM EDT	Flash Flood Watch	PHI	Berks, Bucks, Chester, Delaware, Lehigh, Montgomery and 2 more	48 hr
Aug 26, 5:02 PM EDT	Special Weather Statement	PHI	Monroe	28 min
Aug 26, 5:29 PM EDT	Special Weather Statement	PHI	Monroe	31 min
Aug 26, 5:35 PM EDT	Special Weather Statement	PHI	Carbon	25 min
Aug 26, 5:59 PM EDT	Special Weather Statement	PHI	Carbon	31 min
Aug 26, 6:09 PM EDT	Severe Thunderstorm Warning	PHI	Carbon, Monroe	51 min
Aug 26, 6:24 PM EDT	Areal Flood Advisory	PHI	Carbon	3 hr
Aug 26, 6:56 PM EDT	Special Weather Statement	PHI	Philadelphia	34 min
Aug 26, 7:29 PM EDT	Areal Flood Advisory	PHI	Carbon	2 hr

Nearby

Severe Thunderstorm Warnings in Pennsylvania, 2021 Every severe thunderstorm warning 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.