Alert archive / Pennsylvania / Severe Thunderstorm Warnings in 2021
Severe Thunderstorm Warning 176, NWS Philadelphia/Mount Holly
NWS Philadelphia/Mount Holly issued this severe thunderstorm warning at Jul 16, 2021, 5:21 PM EDT for 4 counties in Pennsylvania. It was in force for 39 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 16, 2021, 5:21 PM EDT (21:21 UTC)
- Expired
- Jul 16, 2021, 6:00 PM EDT
- In force
- 39 min
- Issued by
- NWS Philadelphia/Mount Holly
- Area
- Storm-based polygon
- Hail
- 1.0 in
- Wind
- 60.0 mph
Counties Carbon County, PA, Lehigh County, PA, Monroe County, PA, Northampton County, PA
The radar
The Philadelphia radar (KDIX), 138 km from the middle of the area, began a volume at 21:23 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, 9.4 hours before the alert went out and 228 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.
- Mixed-layer CAPE
- 1044 J/kg
- Mixed-layer CIN
- -56 J/kg
- Mixed-layer LCL
- 994 m above ground
- 0-6 km bulk shear
- 17 kt
- 0-1 km storm-relative helicity
- 108 m²/s²
- 0-3 km storm-relative helicity
- 105 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted.
912
WUUS51 KPHI 162121
SVRPHI
PAC025-077-089-095-162200-
/O.NEW.KPHI.SV.W.0176.210716T2121Z-210716T2200Z/
BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Mount Holly NJ
521 PM EDT Fri Jul 16 2021
The National Weather Service in Mount Holly NJ has issued a
* Severe Thunderstorm Warning for...
Northwestern Lehigh County in eastern Pennsylvania...
Southeastern Carbon County in northeastern Pennsylvania...
Southwestern Monroe County in northeastern Pennsylvania...
Northern Northampton County in eastern Pennsylvania...
* Until 600 PM EDT.
* At 520 PM EDT, a severe thunderstorm was located over Lehighton,
moving east at 35 mph.
HAZARD...60 mph wind gusts and quarter size hail.
SOURCE...Radar indicated.
IMPACT...Minor damage to vehicles is possible. Wind damage to
roofs, siding, trees, and power lines is possible.
* Locations impacted include...
Lehighton, Palmerton, Bangor, Jim Thorpe, Slatington, Pen Argyl,
Wind Gap, Walnutport, East Bangor, Stormville, Brodheadsville, New
Mahoning, Kunkletown, Gilbert, Tannersville, Rossland,
Berlinsville, Emerald, Kresgeville and Sun Valley.
This includes the following highways...
Northeast Extension between mile markers 67 and 84.
Interstate 80 in Pennsylvania between mile markers 298 and 309.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
For your protection move to an interior room on the lowest floor of a
building.
&&
LAT...LON 4083 7513 4069 7576 4072 7579 4074 7576
4078 7583 4083 7587 4112 7528
TIME...MOT...LOC 2120Z 253DEG 30KT 4084 7569
HAIL...1.00IN
WIND...60MPH
$$
SFJ2 follow-up statements
002
WWUS51 KPHI 162141
SVSPHI
Severe Weather Statement
National Weather Service Mount Holly NJ
541 PM EDT Fri Jul 16 2021
PAC025-077-089-095-162200-
/O.CON.KPHI.SV.W.0176.000000T0000Z-210716T2200Z/
Lehigh PA-Carbon PA-Monroe PA-Northampton PA-
541 PM EDT Fri Jul 16 2021
...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 600 PM EDT
FOR NORTHWESTERN LEHIGH...SOUTHEASTERN CARBON...SOUTHWESTERN MONROE
AND NORTHWESTERN NORTHAMPTON COUNTIES...
At 540 PM EDT, a severe thunderstorm was located over Kresgeville, or
13 miles east of Lehighton, moving east at 35 mph.
HAZARD...60 mph wind gusts and penny size hail.
SOURCE...Radar indicated.
IMPACT...Damage to roofs, siding, trees, and power lines is
possible.
Locations impacted include...
Lehighton, Palmerton, Bangor, Jim Thorpe, Slatington, Pen Argyl, Wind
Gap, Walnutport, Stormville, Brodheadsville, New Mahoning,
Kunkletown, Gilbert, Tannersville, Rossland, Berlinsville, Emerald,
Kresgeville, Sun Valley and Jonas.
This includes the following highways...
Northeast Extension between mile markers 67 and 84.
Interstate 80 in Pennsylvania between mile markers 298 and 307.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
For your protection move to an interior room on the lowest floor of a
building.
&&
LAT...LON 4083 7520 4069 7576 4072 7579 4074 7576
4078 7583 4083 7587 4112 7528
TIME...MOT...LOC 2140Z 253DEG 30KT 4089 7547
HAIL...0.75IN
WIND...60MPH
$$
SFJ214
WWUS51 KPHI 162153
SVSPHI
Severe Weather Statement
National Weather Service Mount Holly NJ
553 PM EDT Fri Jul 16 2021
PAC025-077-089-095-162203-
/O.EXP.KPHI.SV.W.0176.000000T0000Z-210716T2200Z/
Lehigh PA-Carbon PA-Monroe PA-Northampton PA-
553 PM EDT Fri Jul 16 2021
...THE SEVERE THUNDERSTORM WARNING FOR NORTHWESTERN LEHIGH...
SOUTHEASTERN CARBON...SOUTHWESTERN MONROE AND NORTHWESTERN
NORTHAMPTON COUNTIES WILL EXPIRE AT 600 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. However gusty
winds are still possible with this thunderstorm.
LAT...LON 4083 7520 4069 7576 4072 7579 4074 7576
4078 7583 4083 7587 4112 7528
TIME...MOT...LOC 2153Z 253DEG 30KT 4092 7535
$$
SFJThe office that day
Everything else NWS Philadelphia/Mount Holly issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jul 16, 3:17 PM EDT | Flash Flood Watch | PHI | Berks, Bucks, Carbon, Chester, Delaware, Lehigh and 4 more | 35 hr |
| Jul 16, 5:07 PM EDT | Special Weather Statement | PHI | Carbon | 23 min |
| Jul 16, 5:25 PM EDT | Special Weather Statement | PHI | Monroe | 35 min |
| Jul 16, 5:34 PM EDT | Areal Flood Advisory | PHI | Carbon, Lehigh, Monroe, Northampton | 112 min |
| Jul 16, 5:38 PM EDT | Severe Thunderstorm Warning | PHI | Monroe | 20 min |
| Jul 16, 7:42 PM EDT | Special Weather Statement | PHI | Berks | 33 min |
Nearby
Severe Thunderstorm Warnings in Pennsylvania, 2021Every 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; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.