Alert archive / Pennsylvania / Special Weather Statements in 2021
Special Weather Statement, NWS Philadelphia/Mount Holly
NWS Philadelphia/Mount Holly issued this special weather statement at Jul 6, 2021, 8:16 PM EDT for Lehigh County, Pennsylvania. It was in force for 29 min. 3 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
- Jul 6, 2021, 8:16 PM EDT (00:16 UTC)
- Expired
- Jul 6, 2021, 8:45 PM EDT
- In force
- 29 min
- Issued by
- NWS Philadelphia/Mount Holly
County Lehigh County, PA
The radar
The Philadelphia radar (KDIX), 121 km from the middle of the area, began a volume at 00:16 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 |
|---|---|---|---|
| Jul 6, 8:26 PM EDT | TSTM WND DMG | Whitehall Twp, PA | SCATTERED TREE BRANCHES DOWN IN AREA. |
| Jul 6, 8:27 PM EDT | TSTM WND GST 61 | North Catasauqua, PA | CORRECTS PREVIOUS TSTM WND GST REPORT FROM WHITEHALL TWP. |
| Jul 6, 8:27 PM EDT | TSTM WND GST 61 | Whitehall Twp, PA |
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 00:00Z, 0.3 hours before the alert went out and 224 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
- 1647 J/kg
- Mixed-layer CIN
- -86 J/kg
- Mixed-layer LCL
- 876 m above ground
- 0-6 km bulk shear
- 25 kt
- 0-1 km storm-relative helicity
- 85 m²/s²
- 0-3 km storm-relative helicity
- 93 m²/s²
- Significant tornado parameter
- 0.3
- Supercell composite
- 3.3
The text
As transmitted.
824 WWUS81 KPHI 070016 SPSPHI Special Weather Statement National Weather Service Mount Holly NJ 816 PM EDT Tue Jul 6 2021 PAZ061-062-105-070045- Upper Bucks-Lehigh-Northampton- 816 PM EDT Tue Jul 6 2021 ...A STRONG THUNDERSTORM WILL AFFECT NORTHEASTERN LEHIGH... NORTHWESTERN BUCKS AND SOUTHWESTERN NORTHAMPTON COUNTIES... At 815 PM EDT, a strong thunderstorm was located over Coffeetown, or 7 miles northwest of Allentown, moving southeast at 30 mph. Wind gusts up to 45 mph and pea size hail are possible with this storm. Locations impacted include... Allentown, Easton, Bethlehem, Forks, Emmaus, Northampton, Wilson, Hellertown, Nazareth, Slatington, Bath, Walnutport, West Easton, Steuben, Glendon, Neffs, Coffeetown, Berlinsville, Lehigh University and Claussville. This includes the following highways... Northeast Extension between mile markers 53 and 67. Interstate 78 in Pennsylvania between mile markers 52 and 75. If outdoors, consider seeking shelter inside a building. This storm may intensify, so be certain to monitor local radio stations and available television stations for additional information and possible warnings from the National Weather Service. A Severe Thunderstorm Watch remains in effect until 1000 PM EDT for eastern and southeastern Pennsylvania. LAT...LON 4063 7569 4079 7559 4071 7520 4045 7537 TIME...MOT...LOC 0015Z 294DEG 27KT 4068 7555 $$ Staarmann
The office that day
Everything else NWS Philadelphia/Mount Holly issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jul 6, 8:03 PM EDT | Special Weather Statement | PHI | Burlington, Ocean | 42 min |
| Jul 6, 8:11 PM EDT | Special Marine Warning | PHI | 82 min | |
| Jul 6, 8:24 PM EDT | Special Marine Warning | PHI | 2 hr | |
| Jul 6, 8:29 PM EDT | Severe Thunderstorm Warning | PHI | Hunterdon, Warren | 46 min |
| Jul 6, 8:37 PM EDT | Severe Thunderstorm Warning | PHI | Hunterdon, Middlesex, Monmouth, Morris, Somerset | 53 min |
| Jul 6, 8:50 PM EDT | Severe Thunderstorm Warning | PHI | Hunterdon, Mercer, Middlesex, Monmouth, Somerset | 40 min |
| Jul 6, 9:04 PM EDT | Severe Thunderstorm Warning | PHI | Hunterdon, Mercer, Middlesex, Somerset | 41 min |
| Jul 6, 9:10 PM EDT | Areal Flood Advisory | PHI | Hunterdon, Mercer, Middlesex, Monmouth, Morris, Somerset and 1 more | 2 hr |
| Jul 6, 9:29 PM EDT | Severe Thunderstorm Warning | PHI | Hunterdon, Mercer, Middlesex, Monmouth, Morris, Somerset | 61 min |
| Jul 6, 9:37 PM EDT | Special Marine Warning | PHI | 113 min | |
| Jul 6, 9:48 PM EDT | Severe Thunderstorm Warning | PHI | Burlington, Mercer, Middlesex, Monmouth, Ocean | 57 min |
| Jul 6, 10:21 PM EDT | Severe Thunderstorm Warning | PHI | Burlington, Camden | 39 min |
| Jul 6, 10:50 PM EDT | Areal Flood Advisory | PHI | Monmouth, Ocean | 2 hr |
| Jul 6, 10:54 PM EDT | Special Weather Statement | PHI | Burlington | 51 min |
| Jul 6, 11:11 PM EDT | Special Weather Statement | PHI | Burlington | 19 min |
| Jul 6, 11:30 PM EDT | Severe Thunderstorm Warning | PHI | Atlantic, Burlington, Camden, Ocean | 45 min |
| Jul 6, 11:39 PM EDT | Special Marine Warning | PHI | 66 min | |
| Jul 6, 11:55 PM EDT | Special Weather Statement | PHI | Monmouth | 50 min |
| Jul 7, 12:01 AM EDT | Areal Flood Advisory | PHI | Middlesex, Monmouth | 71 min |
| Jul 7, 12:10 AM EDT | Special Marine Warning | PHI | 95 min | |
| Jul 7, 11:19 AM EDT | Tropical Storm Watch | PHI | Atlantic, Burlington, Cape May, Monmouth, Ocean | 18 hr |
| Jul 7, 3:32 PM EDT | Flash Flood Watch | PHI | Atlantic, Burlington, Camden, Cape May, Cumberland, Gloucester and 10 more | 42 hr |
| Jul 6, 10:08 PM EDT | Special Weather Statement | PHI | Philadelphia | 37 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.