Alert archive / Pennsylvania / Severe Thunderstorm Warnings in 2005

Severe Thunderstorm Warning 86, NWS Philadelphia/Mount Holly

July 27, 2005Carbon County, Lehigh County, Northampton County, Pennsylvania

NWS Philadelphia/Mount Holly issued this severe thunderstorm warning at Jul 27, 2005, 4:30 PM EDT for Carbon County, Lehigh County, Northampton County, Pennsylvania. It was in force for 45 min. 1 report 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 27, 2005, 4:30 PM EDT (20:30 UTC)
Expired: Jul 27, 2005, 5:15 PM EDT
In force: 45 min
Issued by: NWS Philadelphia/Mount Holly
Area: Counties, with a storm outline in the text

Counties Carbon County, PA, Lehigh County, PA, Northampton County, PA

The radar

The Philadelphia radar (KDIX), 142 km from the middle of the area, began a volume at 20:29 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.

What was reported inside it

Time	Report	Where	Remark
Jul 27, 4:35 PM EDT	TSTM WND DMG	Palmerton, PA	TREES AND POWERLINES DOWN THROUGHOUT THE COUNTY.

Local storm reports filed while the alert was in force, from inside its polygon or its counties.

The watch it was issued in

The SPC watch in force over the same counties when this warning went out.

Issued	Product	Office	Lasted
Jul 27, 1:10 PM EDT	Severe Thunderstorm Watch	SPC	7 hr
Jul 27, 1:50 PM EDT	Severe Thunderstorm Watch	SPC	8 hr

The nearest sounding before it

Phillips Aaf/Abe, MD (KAPG), launched 12:00Z, 8.5 hours before the alert went out and 156 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.

Skew-T log-p

Temperature in red, dew point in green, the mixed-layer parcel dashed.

Hodograph

The wind turning with height, colored by layer: ground to 1 km, 1 to 3 km, 3 to 6 km, 6 to 10 km.

Mixed-layer CAPE: 1105 J/kg
Mixed-layer CIN: -73 J/kg
Mixed-layer LCL: 1506 m above ground
0-6 km bulk shear: 18 kt
0-1 km storm-relative helicity: 31 m²/s²
0-3 km storm-relative helicity: 29 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

As transmitted, in the capitals the NWS used until 2016.

000 
WUUS51 KPHI 272031
SVRPHI
PAC025-077-095-272115-
/O.NEW.KPHI.SV.W.0086.050727T2030Z-050727T2115Z/

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE MOUNT HOLLY NJ
430 PM EDT WED JUL 27 2005

THE NATIONAL WEATHER SERVICE IN MOUNT HOLLY NJ HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  NORTHWESTERN LEHIGH COUNTY IN EASTERN PENNSYLVANIA
  WEST CENTRAL NORTHAMPTON COUNTY IN EASTERN PENNSYLVANIA
  SOUTHEASTERN CARBON COUNTY IN NORTHEAST PENNSYLVANIA

* UNTIL 515 PM EDT

* AT 426 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  SEVERE THUNDERSTORM.  THIS STORM WAS LOCATED NEAR LEHIGHTON...OR
  ABOUT 19 MILES NORTHWEST OF ALLENTOWN...AND MOVING EAST AT 30 MPH.

* THE SEVERE THUNDERSTORM WILL BE NEAR...
  PALMERTON BY 435 PM EDT
  BATH BY 450 PM EDT
  NAZARETH BY 500 PM EDT

WIND GUSTS TO 6O MPH...HAIL AND HEAVY RAIN ARE POSSIBLE WITH THIS 
STORM.

LAT...LON 4089 7582 4067 7582 4073 7530 4082 7548
      4094 7557

$$

NIERENBERG

The office that day

Everything else NWS Philadelphia/Mount Holly issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
Jul 27, 4:06 PM EDT	Severe Thunderstorm Warning	PHI	Monroe	39 min
Jul 27, 4:12 PM EDT	Severe Thunderstorm Warning	PHI	Berks	48 min
Jul 27, 5:17 PM EDT	Severe Thunderstorm Warning	PHI	Berks	43 min
Jul 27, 5:47 PM EDT	Severe Thunderstorm Warning	PHI	Chester, Montgomery	58 min
Jul 27, 6:30 PM EDT	Severe Thunderstorm Warning	PHI	Philadelphia	45 min
Jul 27, 6:34 PM EDT	Severe Thunderstorm Warning	PHI	Bucks	56 min
Jul 27, 6:40 PM EDT	Severe Thunderstorm Warning	PHI	Montgomery	35 min

Nearby

Severe Thunderstorm Warnings in Pennsylvania, 2005 Every severe thunderstorm warning in 2005

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.