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|Pulse Severe Thunderstorms of June 9th, 2006|
June 9th turned out to be a very busy day - with early reports totalling more than 10 severe events
(and many sub-severe hail and wind events) occurring from late morning to the evening.
The wet-bulb zero level of around 6-7kft AGL and freezing level near 8kft (over the higher ground of Central PA vs. KPIT) helped many cells to produce hail early and throughout their lifetimes.
The storms were aided by a strong wind profile at all levels - much stronger than the severe pulse storms of May 30th and 31st.
This wind profile eventually lead to more organization to the cells, but as with the events two weeks before, the thunderstorms started out as mainly pulse thunderstorms with short durations/life-spans, fired up by the (modest) heating of the day.
Preliminary Damage Reports in Text format
Pittsburgh, PA (KPIT) morning (12z) SkewT Balloon Sounding Note the strong winds aloft (reaching 55kts by 20kft, and as high as 99kts around 35kft). The Convective Temperature (temperature at which cumulus clouds will start to grow) of 74°F was reched very early in the day. Modest/respectable CAPEs of 600 to 700 J/kg were possible, and were most likely realized by late that morning.
Visible Satellite Pic from 1715z (115 PM EDT) with past 15 minutes of Cloud to Ground Lightning Strikes (CGs) overlaid. Note the widespread thunderstorm activity by 1 PM! They started early and lasted into the early evening.
KCCX 0.5° Reflectivity from 1751z (151PM EDT) with warning box plots and Spotter Storm Reports overlaid. Later in the afternoon, the storms had evolved from scattered cells into a bit of linear/mini-bow-echo organization thanks to the strong NW winds aloft. Many storms produced wind damage and large hail. See two of the reports we received from spotters and law enforcement officials plotted in black (one near Williamsport - A=Hail 0.88=diameter in inches - and another report west of Harrisburg). Current warnings (outlines) are also seen in pink on this picture.
KCCX Reflectivity Cross Section from 2044z (444PM EDT) from storm near Williamsport. Note the storm reached up to 28kft or so...with a strong reflectivity core held aloft (strong updraft) in an excellent place for hail generation/growth (above the wet-bulb zero and freezing levels all the way to the top of the storm cell). The storm was also apparently able to tap the 50+kt winds at the top of the storm cell (see SkewT above), and bring them down to the surface, as it blew a couple of trees down in western Lycoming County.
2006 Weather Events/Features:
- Mini Severe Weather Event (Bow Echoes), March 13th.
- Hail Storms of April 3rd
- May 1st, 2006 - Tussey Mountain Wildfire
- May 30th, 2006 - Severe Pulse Thunderstorms
- May 31st, 2006 - Severe Pulse Thunderstorms, take #2
- June 1st, 2006 - Flash Flooding in York County
- June 2nd, 2006 - More Flash Flooding and Severe Weather in York County
- June 9th, 2006 - Severe Thunderstorms - Hail and Wind
- June 22nd, 2006 - Widespread Severe Thunderstorms
- Flooding of Late June 2006 - Widespread Flooding
- July 9th, 2006 - More Severe Pulse Thunderstorms
- July 10th, 2006 - Anti-Cyclonic Mesocyclone over Elk County
- July 18th, 2006 - Hail and Wind Producing Storms
- July 27th, 2006 - Hail and Wind Producing Storms
- August 25-26th, 2006 - Long-Lived Supercells
- September 1-2, 2006 - Rain from the remnants of TS Ernesto
- September 28th, 2006 - Severe Thunderstorms, including F1 Tornado in Cumberland County
- November 16th, 2006 - Severe Thunderstorms
- December 1st, 2006 - Severe Thunderstorms, including F1 Tornado in Dauphin County
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