SPC AC 071722
Day 2 Convective Outlook
NWS Storm Prediction Center Norman OK
1222 PM CDT Sat Apr 07 2018
Valid 081200Z - 091200Z
...NO SEVERE THUNDERSTORM AREAS FORECAST...
...SUMMARY...
Isolated thunderstorms will be possible over parts of the northern
and central Rockies on Sunday. A few thunderstorms are also forecast
over the central and southern Florida Peninsula. Organized severe
weather is not expected.
...Synopsis...
A broad long wave trough over the central/eastern US is forecast to
redevelop tomorrow as a series of short wave troughs progress
southeastward into the central states, as a downstream trough over
the eastern US moves offshore into the Atlantic. At the surface, a
cold front will settle southward across the central Florida
peninsula before becoming diffuse by the end of the period.
...Florida Peninsula...
The air mass along and south of the front over central Florida will
remain moist with surface dew points of 65-70F. Relatively warm
mid-level temperatures will temper lapse rates, however, diabatic
low-level heating through the afternoon will create sufficient
buoyancy to support development of a few thunderstorms.
...Parts of the Northern and Central Rockies...
Satellite imagery indicates a well-defined upper low off the Pacific
Northwest coast. This system is forecast to move onshore early in
the period and open into a short wave trough, before turning
southeastward toward the central Rockies in response to upstream
ridging over the eastern Pacific. Colder mid-level temperatures
associated with the trough will contribute to steepening lapse rates
and marginal instability, especially during the diurnal heating
period. Isolated thunderstorms will be possible mainly during the
afternoon and evening hours.
..Weiss.. 04/07/2018
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