Upload
lars-franks
View
23
Download
0
Tags:
Embed Size (px)
DESCRIPTION
The 11 June 2008 Severe Pulse Storm over Newberry SC. Michael W. Cammarata (NWS CAE) Jamie Christopher (former Student Volunteer, NWS CAE). Overview. During the late afernoon of 11 June 2008 a severe pulse thunderstorm produced 0.88 inch hail over Newberry SC. - PowerPoint PPT Presentation
Citation preview
The 11 June 2008 Severe Pulse Storm over Newberry SC
Michael W. Cammarata (NWS CAE)
Jamie Christopher (former Student Volunteer, NWS CAE)
Overview
• During the late afernoon of 11 June 2008 a severe pulse thunderstorm produced 0.88 inch hail over Newberry SC
NAM 16h forecast sounding valid at 2200 GMT shows moderate to strong instability, weak shear, and wet bulb zero temperatures favorable for large hail…also note dry layer 12-22k ft…evaporative cooling can lower freezing level increasing large hail potential
2123Z
*Note - Small reflectivity core
develops above -20C (red line).
Max 44dbz
2127Z
*Note – Reflectivity core
strengthens above -20C line.
Max 54dbz
*Note – Reflectivity core
increases in coverage.
Max 64dbz
2131Z
*Note – Reflectivity core lowers in height
and higher reflectivity is seen.
Max 69dbz
Good indication that hail has increased in
size.
2135Z
*Note – Reflectivity core lowers below the 0C level (yellow line).
Max 66dbz
Updraft is weakening
and hail size is decreasing
as melting occurs.
2140Z
*Note – Core continues to lower
as storm continues to
collapse.
2144Z
Sfc temp = 92F
Significant melting of
hailstones is occurring as sfc
temp is very warm.
*Note – Main core continues to
weaken.
Heavy rain is more of a
possibility at this point.
2148Z
*Note – Storm has almost fully collapsed.
Heavy rain is still a
possibility.
2152Z
Conclusion
• 3-D analysis of radar data makes it easy to visualize the delopment of high reflectivity cores aloft early in the storm life cycle.
• Can lead to increased lead times in pulse events