Mesoscale Discussion 0846
NWS Storm Prediction Center Norman OK
0338 PM CDT Fri May 26 2017
Areas affected...Southeastern Wyoming...eastern Colorado and
adjacent portions of the high Plains
Concerning...Severe Thunderstorm Watch 268...
Valid 262038Z - 262215Z
The severe weather threat for Severe Thunderstorm Watch 268
SUMMARY...Isolated to widely scattered discrete supercells will
continue to develop across the watch area through the remainder of
the afternoon. Trends will be monitored for the possibility of an
additional watch to the east of watch 268.
DISCUSSION...A long-lived supercell storm (which earlier produced a
tornado near I-80 in Sweetwater county) is passing near/just north
and east of Rawlins, where sustained 3 mb 2-hour pressure falls have
been observed in surface data. This storm seems likely to maintain
strength another couple of hours (at least into the western slopes
of the Laramie Range), with continuing potential for severe hail,
locally strong wind gusts, and perhaps another tornado. Additional
new storm development and intensification also appears possible to
its south and east, near the I-80 corridor into the Laramie Range.
East of the Laramies, southward along the Front Range, through
eastern Colorado, isolated to widely scattered strong to severe
storms development is now well underway, particularly to the
northeast and east of Denver. Further intensification of this
activity, along with additional new discrete storm development,
seems likely across the high Plains, as the boundary layer continues
to heat, and CAPE becomes weak to moderate in the presence of very
steep lapse rates.
...Please see www.spc.noaa.gov for graphic product...
LAT...LON 42450730 42690554 41960434 40990359 40160248 39690178
38580188 37700227 37180310 38230409 39090507 39620523
40470569 41360726 42450730