Alert archive / Pennsylvania / Special Weather Statements in 2018
Special Weather Statement, NWS Philadelphia/Mount Holly
NWS Philadelphia/Mount Holly issued this special weather statement at Aug 17, 2018, 5:36 PM EDT for Lehigh County, Northampton County, Pennsylvania. It was in force for 39 min. 4 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
- Aug 17, 2018, 5:36 PM EDT (21:36 UTC)
- Expired
- Aug 17, 2018, 6:15 PM EDT
- In force
- 39 min
- Issued by
- NWS Philadelphia/Mount Holly
Counties Lehigh County, PA, Northampton County, PA
The radar
The Philadelphia radar (KDIX), 123 km from the middle of the area, began a volume at 21:36 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 17, 6:00 PM EDT | TSTM WND DMG | Bath, PA | TWO TREES DOWNED. |
| Aug 17, 6:00 PM EDT | TSTM WND DMG | Moore Twp, PA | SEVERAL REPORTS OF DOWNED TREES AND POWER LINES IN MOORE TWP...ALLEN TWP...AND CHAPMAN. TIME ESTIMATED FROM RADAR. |
| Aug 17, 6:00 PM EDT | TSTM WND GST 62 | Bath, PA | |
| Aug 17, 6:03 PM EDT | TSTM WND DMG | Bushkill Twp, PA | MULTIPLE REPORTS OF TREES AND WIRES DOWN IN BUSHKILL TOWNSHIP |
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, 9.6 hours before the alert went out and 223 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
- 321 J/kg
- Mixed-layer CIN
- -56 J/kg
- Mixed-layer LCL
- 1245 m above ground
- 0-6 km bulk shear
- 20 kt
- 0-1 km storm-relative helicity
- 38 m²/s²
- 0-3 km storm-relative helicity
- 65 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.3
The text
As transmitted.
346 WWUS81 KPHI 172136 SPSPHI Special Weather Statement National Weather Service Mount Holly NJ 536 PM EDT FRI AUG 17 2018 PAZ054-055-061-062-172215- Lehigh-Monroe-Northampton-Carbon- 536 PM EDT FRI AUG 17 2018 ...A STRONG THUNDERSTORM WILL AFFECT CENTRAL LEHIGH...SOUTHEASTERN CARBON...SOUTH CENTRAL MONROE AND WEST CENTRAL NORTHAMPTON COUNTIES... At 536 PM EDT, a strong thunderstorm was located over Claussville, or 7 miles west of Allentown, moving northeast at 30 mph. Winds up to 50 mph and pea size hail are possible with this storm. Locations impacted include... Allentown, Bethlehem, Northampton, Nazareth, Slatington, Bath, Walnutport, Belfast, Tatamy, Steuben, Kunkletown, Neffs, Coffeetown, Rossland, Berlinsville, Emerald, Claussville, Danielsville, Beersville and Schnecksville. Torrential rainfall is also occurring with this storm, and may cause localized flooding. Do not drive your vehicle through flooded roadways. A severe thunderstorm watch remains in effect until 1100 PM EDT for eastern and northeastern Pennsylvania. LAT...LON 4053 7555 4065 7574 4092 7545 4077 7522 TIME...MOT...LOC 2136Z 223DEG 24KT 4063 7562 $$ CMS
The office that day
Everything else NWS Philadelphia/Mount Holly issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Aug 17, 3:37 PM EDT | Special Weather Statement | PHI | Hunterdon | 38 min |
| Aug 17, 3:42 PM EDT | Special Weather Statement | PHI | Warren | 48 min |
| Aug 17, 5:46 PM EDT | Special Weather Statement | PHI | Morris | 14 min |
| Aug 17, 5:59 PM EDT | Severe Thunderstorm Warning | PHI | Warren | 31 min |
| Aug 17, 6:02 PM EDT | Special Weather Statement | PHI | Morris | 13 min |
| Aug 17, 6:22 PM EDT | Severe Thunderstorm Warning | PHI | Sussex, Warren | 38 min |
| Aug 17, 6:59 PM EDT | Special Weather Statement | PHI | Sussex | 31 min |
| Aug 17, 7:28 PM EDT | Special Weather Statement | PHI | Sussex | 17 min |
| Aug 17, 7:42 PM EDT | Special Weather Statement | PHI | Hunterdon, Warren | 33 min |
| Aug 17, 2:21 PM EDT | Special Weather Statement | PHI | Lehigh | 24 min |
| Aug 17, 4:29 PM EDT | Special Weather Statement | PHI | Berks | 46 min |
| Aug 17, 5:07 PM EDT | Special Weather Statement | PHI | Berks, Lehigh | 53 min |
| Aug 17, 5:12 PM EDT | Special Weather Statement | PHI | Berks | 33 min |
| Aug 17, 6:00 PM EDT | Special Weather Statement | PHI | Carbon | 30 min |
| Aug 17, 6:18 PM EDT | Special Weather Statement | PHI | Berks | 27 min |
| Aug 17, 6:19 PM EDT | Severe Thunderstorm Warning | PHI | Carbon, Monroe | 41 min |
| Aug 17, 6:23 PM EDT | Severe Thunderstorm Warning | PHI | Berks, Lehigh | 52 min |
| Aug 17, 6:40 PM EDT | Flash Flood Warning | PHI | Berks | 2 hr |
| Aug 17, 7:09 PM EDT | Severe Thunderstorm Warning | PHI | Berks, Bucks, Carbon, Chester, Lehigh, Monroe and 2 more | 51 min |
| Aug 17, 7:15 PM EDT | Special Weather Statement | PHI | Pike | 15 min |
| Aug 17, 7:34 PM EDT | Special Weather Statement | PHI | Carbon | 26 min |
| Aug 17, 7:39 PM EDT | Special Weather Statement | PHI | Monroe | 51 min |
Nearby
Special Weather Statements in Pennsylvania, 2018Every special weather statement in 2018
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.