Alert archive / Pennsylvania / Severe Thunderstorm Warnings in 2008

Severe Thunderstorm Warning 66, NWS Philadelphia/Mount Holly

June 14, 2008Carbon County, Monroe County, Pennsylvania

NWS Philadelphia/Mount Holly issued this severe thunderstorm warning at Jun 14, 2008, 5:18 PM EDT for Carbon County, Monroe County, Pennsylvania. It was in force for 57 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: Jun 14, 2008, 5:18 PM EDT (21:18 UTC)
Expired: Jun 14, 2008, 6:15 PM EDT
In force: 57 min
Issued by: NWS Philadelphia/Mount Holly
Area: Storm-based polygon

Counties Carbon County, PA, Monroe County, PA

The radar

The Philadelphia radar (KDIX), 144 km from the middle of the area, began a volume at 21:21 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
Jun 14, 5:55 PM EDT	TSTM WND DMG	Beltzville State Park, PA	TREES DOWN IN TOWAMENSING 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, 9.3 hours before the alert went out and 225 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: 29 J/kg
Mixed-layer CIN: -177 J/kg
Mixed-layer LCL: 1159 m above ground
0-6 km bulk shear: 22 kt
0-1 km storm-relative helicity: 42 m²/s²
0-3 km storm-relative helicity: 72 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 142118
SVRPHI
PAC025-089-142215-
/O.NEW.KPHI.SV.W.0066.080614T2118Z-080614T2215Z/

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE MOUNT HOLLY NJ
518 PM EDT SAT JUN 14 2008

THE NATIONAL WEATHER SERVICE IN MOUNT HOLLY NJ HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  CENTRAL CARBON COUNTY IN NORTHEAST PENNSYLVANIA...
  SOUTHWESTERN MONROE COUNTY IN NORTHEAST PENNSYLVANIA...

* UNTIL 615 PM EDT

* AT 517 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  SEVERE THUNDERSTORM CAPABLE OF PRODUCING QUARTER SIZE HAIL...AND
  DAMAGING WINDS IN EXCESS OF 60 MPH.  THIS STORM WAS LOCATED NEAR
  CHRISTMANS...OR ABOUT 22 MILES SOUTHEAST OF WILKES-BARRE...AND
  MOVING EAST AT 28 MPH.

* THE SEVERE THUNDERSTORM WILL BE NEAR...
  MECKESVILLE...PENN FOREST RESERVOIR AND 7 MILES NORTH OF BELTZVILLE
  STATE PARK BY 525 PM...
  JONAS BY 530 PM...

THIS IS A DANGEROUS STORM. IF YOU ARE IN ITS PATH...PREPARE
IMMEDIATELY FOR DAMAGING WINDS...DESTRUCTIVE HAIL...AND DEADLY CLOUD
TO GROUND LIGHTNING. PEOPLE OUTSIDE SHOULD MOVE TO A SHELTER...
PREFERABLY INSIDE A STRONG BUILDING BUT AWAY FROM WINDOWS.

THUNDERSTORMS ARE CAPABLE OF PRODUCING HEAVY RAINFALL WHICH MAY
RESULT IN LOCALIZED AREAS OF FLOODING. DO NOT DRIVE IN AREAS WHERE
WATER IS CROSSING THE ROAD.

LAT...LON 4110 7556 4082 7544 4082 7546 4082 7547
      4081 7549 4081 7550 4080 7571 4109 7570
TIME...MOT...LOC 2118Z 284DEG 24KT 4098 7563

$$

TFG

The office that day

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

Issued	Product	Office	Counties	Lasted
Jun 14, 2:23 PM EDT	Flash Flood Warning	PHI	Monroe	3 hr
Jun 14, 3:02 PM EDT	Severe Thunderstorm Warning	PHI	Monroe	58 min
Jun 14, 4:26 PM EDT	Severe Thunderstorm Warning	PHI	Carbon, Monroe, Northampton	64 min
Jun 14, 4:49 PM EDT	Flash Flood Warning	PHI	Carbon	5 hr
Jun 14, 5:07 PM EDT	Severe Thunderstorm Warning	PHI	Carbon, Monroe	53 min
Jun 14, 6:15 PM EDT	Severe Thunderstorm Warning	PHI	Chester	75 min
Jun 14, 6:28 PM EDT	Flash Flood Warning	PHI	Chester	60 min
Jun 14, 6:48 PM EDT	Flash Flood Warning	PHI	Carbon, Monroe	3 hr
Jun 14, 7:05 PM EDT	Severe Thunderstorm Warning	PHI	Berks, Chester, Montgomery	70 min
Jun 14, 7:42 PM EDT	Severe Thunderstorm Warning	PHI	Bucks, Chester, Montgomery	63 min
Jun 14, 7:56 PM EDT	Severe Thunderstorm Warning	PHI	Bucks, Delaware, Philadelphia	79 min

Nearby

Severe Thunderstorm Warnings in Pennsylvania, 2008 Every severe thunderstorm warning in 2008

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.