Alert archive / Pennsylvania / Special Weather Statements in 2017
Special Weather Statement, NWS Philadelphia/Mount Holly
NWS Philadelphia/Mount Holly issued this special weather statement at Aug 3, 2017, 8:11 PM EDT for Lehigh County, Pennsylvania. It was in force for 49 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
- Aug 3, 2017, 8:11 PM EDT (00:11 UTC)
- Expired
- Aug 3, 2017, 9:00 PM EDT
- In force
- 49 min
- Issued by
- NWS Philadelphia/Mount Holly
County Lehigh County, PA
The radar
The Philadelphia radar (KDIX), 126 km from the middle of the area, began a volume at 00:11 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 00:00Z, 0.2 hours before the alert went out and 231 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
- 87 J/kg
- Mixed-layer CIN
- -92 J/kg
- Mixed-layer LCL
- 937 m above ground
- 0-6 km bulk shear
- 13 kt
- 0-1 km storm-relative helicity
- 45 m²/s²
- 0-3 km storm-relative helicity
- 43 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted.
322 WWUS81 KPHI 040011 SPSPHI Special Weather Statement National Weather Service Mount Holly NJ 811 PM EDT THU AUG 3 2017 PAZ054-061-062-040100- Lehigh-Northampton-Carbon- 811 PM EDT THU AUG 3 2017 ...A STRONG THUNDERSTORM WILL AFFECT CENTRAL LEHIGH...SOUTHEASTERN CARBON AND WEST CENTRAL NORTHAMPTON COUNTIES... At 810 PM EDT, a strong thunderstorm was located over Claussville, or 8 miles west of Allentown, moving northeast at 5 mph. Winds up to 50 mph and dime size hail are possible with this storm. Locations impacted include... Allentown, Bethlehem, Northampton, Palmerton, Slatington, Walnutport, Steuben, Neffs, Coffeetown, Berlinsville, Jordan Valley, Ancient Oaks, Beersville, Emerald, Schnecksville, Claussville, Catasauqua, Coplay, North Catasauqua and Alburtis. Torrential rainfall is also occurring with this storm, and may cause localized flooding. Do not drive your vehicle through flooded roadways. LAT...LON 4051 7559 4062 7578 4084 7563 4068 7535 TIME...MOT...LOC 0010Z 217DEG 6KT 4063 7563 $$ CMS
The office that day
Everything else NWS Philadelphia/Mount Holly issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Aug 3, 8:02 PM EDT | Special Weather Statement | PHI | Warren | 43 min |
| Aug 3, 9:11 PM EDT | Areal Flood Warning | PHI | Burlington | 4 hr |
| Aug 3, 9:20 PM EDT | Areal Flood Advisory | PHI | Sussex, Warren | 3 hr |
| Aug 4, 3:41 PM EDT | Small Craft Advisory | PHI | 9 hr | |
| Aug 3, 8:01 PM EDT | Special Weather Statement | PHI | Berks | 44 min |
| Aug 3, 8:29 PM EDT | Severe Thunderstorm Warning | PHI | Lehigh, Northampton | 46 min |
| Aug 3, 8:35 PM EDT | Areal Flood Advisory | PHI | Berks, Lehigh, Northampton | 4 hr |
| Aug 3, 8:54 PM EDT | Special Weather Statement | PHI | Berks | 51 min |
| Aug 3, 9:29 PM EDT | Special Weather Statement | PHI | Lehigh, Northampton | 46 min |
| Aug 4, 1:25 PM EDT | Special Weather Statement | PHI | Berks | 65 min |
| Aug 4, 2:49 PM EDT | Areal Flood Advisory | PHI | Berks | 116 min |
Nearby
Special Weather Statements in Pennsylvania, 2017Every special weather statement in 2017
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.