Alert archive / Pennsylvania / Severe Thunderstorm Warnings in 2006

Severe Thunderstorm Warning 28, NWS Philadelphia/Mount Holly

May 13, 2006Bucks County, Pennsylvania

NWS Philadelphia/Mount Holly issued this severe thunderstorm warning at May 13, 2006, 2:26 PM EDT for Bucks County, Pennsylvania. It was in force for 34 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: May 13, 2006, 2:26 PM EDT (18:26 UTC)
Expired: May 13, 2006, 3:00 PM EDT
In force: 34 min
Issued by: NWS Philadelphia/Mount Holly
Area: Counties, with a storm outline in the text

County Bucks County, PA

The radar

The Philadelphia radar (KDIX), 63 km from the middle of the area, began a volume at 18:29 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
May 13, 2:30 PM EDT	HAIL 0.25	Warminster Heights, PA	PEA SIZE HAIL REPORTED IN WARMINSTER. TRAINED SPOTTER INDICATED THE HAIL WAS COVERING THEIR DECK.

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, 6.4 hours before the alert went out and 199 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: 0 J/kg
Mixed-layer CIN: No buoyant parcel
Mixed-layer LCL: 1041 m above ground
0-6 km bulk shear: 54 kt
0-1 km storm-relative helicity: 27 m²/s²
0-3 km storm-relative helicity: 70 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 131826
SVRPHI
PAC017-131900-
/O.NEW.KPHI.SV.W.0028.060513T1826Z-060513T1900Z/

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE MOUNT HOLLY NJ
226 PM EDT SAT MAY 13 2006

THE NATIONAL WEATHER SERVICE IN MOUNT HOLLY NJ HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  CENTRAL BUCKS COUNTY IN SOUTHEAST PENNSYLVANIA

* UNTIL 300 PM EDT

* AT 220 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  SEVERE THUNDERSTORM CAPABLE OF PRODUCING PENNY SIZE HAIL.  THIS
  STORM WAS LOCATED NEAR FEASTERVILLE...OR ABOUT 12 MILES NORTHEAST
  OF PHILADELPHIA...AND MOVING NORTHWEST AT 15 MPH.

* THE SEVERE THUNDERSTORM WILL BE NEAR...
  IVYLAND AND RICHBORO BY 235 PM EDT
  DOYLESTOWN AND CHALFONT BY 300 PM EDT

LAT...LON 4012 7502 4015 7493 4038 7504 4032 7529

$$

STAUBER

The office that day

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

Issued	Product	Office	Counties	Lasted
May 13, 1:07 PM EDT	Flash Flood Warning	PHI	Berks	83 min
May 13, 1:07 PM EDT	Flash Flood Warning	PHI	Berks	23 min
May 13, 2:59 PM EDT	Severe Thunderstorm Warning	PHI	Berks	46 min
May 13, 4:18 PM EDT	Severe Thunderstorm Warning	PHI	Monroe	13 min

Nearby

Severe Thunderstorm Warnings in Pennsylvania, 2006 Every severe thunderstorm warning in 2006

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.