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, 9:29 PM EDT for Lehigh County, Northampton County, Pennsylvania. It was in force for 46 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, 9:29 PM EDT (01:29 UTC)
- Expired
- Aug 3, 2017, 10:15 PM EDT
- In force
- 46 min
- Issued by
- NWS Philadelphia/Mount Holly
Counties Lehigh County, PA, Northampton County, PA
The radar
The Philadelphia radar (KDIX), 121 km from the middle of the area, began a volume at 01:29 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, 1.5 hours before the alert went out and 211 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.
996
WWUS81 KPHI 040129
SPSPHI
Special Weather Statement
National Weather Service Mount Holly NJ
929 PM EDT THU AUG 3 2017
NJZ007-009-PAZ055-061-062-040215-
Hunterdon-Warren-Lehigh-Monroe-Northampton-
929 PM EDT THU AUG 3 2017
...A STRONG THUNDERSTORM WILL AFFECT NORTHWESTERN HUNTERDON...
SOUTHWESTERN WARREN...CENTRAL LEHIGH...SOUTH CENTRAL MONROE AND
NORTHAMPTON COUNTIES...
At 928 PM EDT, a strong thunderstorm was located over Northampton, or
7 miles northwest of Allentown, moving northeast at 30 mph.
Winds up to 40 mph and pea size hail are possible with this storm.
Locations impacted include...
Allentown, Easton, Bethlehem, Forks, Emmaus, Northampton, Wilson,
Washington, Hellertown, Nazareth, Bangor, Slatington, Pen Argyl, Wind
Gap, Bath, Belvidere, Harmony, Alpha, Walnutport and Belfast.
Torrential rainfall is also occurring with this storm, and may cause
localized flooding. Do not drive your vehicle through flooded
roadways.
LAT...LON 4071 7495 4052 7556 4067 7574 4081 7553
4081 7548 4084 7549 4102 7522
TIME...MOT...LOC 0128Z 224DEG 24KT 4068 7554
$$
CMSThe 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, 8:11 PM EDT | Special Weather Statement | PHI | Lehigh | 49 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 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.