MD 1205 CONCERNING SEVERE THUNDERSTORM WATCH 398… FOR PORTIONS OF NORTHEASTERN COLORADO
Mesoscale Discussion 1205
NWS Storm Prediction Center Norman OK
0539 PM CDT Sat Jun 08 2024
Areas affected…Portions of northeastern Colorado
Concerning…Severe Thunderstorm Watch 398…
Valid 082239Z – 090045Z
The severe weather threat for Severe Thunderstorm Watch 398
continues.
SUMMARY…A localized corridor of significant severe-gust potential
(75-85 mph) is evident for the next few hours across portions of
northeast Colorado. Sporadic large hail and brief tornadoes are also
possible.
DISCUSSION…An upscale-growing cluster of storms is tracking
southeastward at around 25-30 kt across portions of northeastern CO
— generally between I-70 and I-76. Gusts upwards of 70 mph have
been observed with these storms. During the next few hours,
continued upscale growth/cold pool consolidation is expected, aided
by a glancing shortwave trough (evident in water-vapor imagery) over
far northeastern CO. Earlier heating of a relatively moist boundary
layer (middle/upper 50s dewpoints) beneath steep midlevel lapse
rates should support continued surface-based inflow for intensifying
updrafts at the leading edge of the convective line. And, around 50
kt of westerly/line-orthogonal 0-6 km shear (sampled by regional
VWP) should aid in organized embedded updrafts with instances of
deep/persistent rotation. As a result, the organizing cold pool and
embedded supercell/mesovortex structures will be capable of
producing significant gusts of 75-85 mph as it continues
southeastward for the next few hours. Sporadic large hail and brief
tornadoes will also be possible, especially with the embedded
supercells/mesovorticies.
..Weinman.. 06/08/2024
…Please see www.spc.noaa.gov for graphic product…
ATTN…WFO…GLD…BOU…
LAT…LON 39860388 40200352 40360327 40470295 40300245 40060212
39580213 39280239 39120294 39070364 39310417 39500426
39860388
