Severe Storm Outlook Narrative (AC)
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ACUS11 KWNS 010336
SWOMCD
SPC MCD 010336
NDZ000-MTZ000-010500-
Mesoscale Discussion 1502
NWS Storm Prediction Center Norman OK
1036 PM CDT Sun Jun 30 2024
Areas affected...parts of eastern MT/western ND
Concerning...Severe Thunderstorm Watch 493...
Valid 010336Z - 010500Z
The severe weather threat for Severe Thunderstorm Watch 493
continues.
SUMMARY...An isolated severe wind/hail threat should shift across a
part of east-central Montana before weakening in western North
Dakota overnight.
DISCUSSION...Strengthening of the low-level jet earlier this evening
(the eastern periphery of which is sampled by the Bismarck VWP),
yielded an increase in thunderstorm development along remnant
outflow from decayed afternoon convection. Thus far, severe wind
gusts up to 53 kts have been measured at Miles City, with
golfball-sized hail reported in Treasure County, MT. Recently, the
more intense updrafts have accelerated northeastward in east-central
MT. This trend is expected to continue as MLCIN becomes more
pronounced south of the I-94 corridor. The orientation of this
evolution will result in storms encountering an increasingly more
stable airmass in western ND. This should yield a diminishing trend
to storms as they spread farther northeastward overnight. Until that
time, isolated large hail and severe wind gusts will remain
possible, mainly through about 06Z.
..Grams.. 07/01/2024
...Please see www.spc.noaa.gov for graphic product...
ATTN...WFO...BIS...BYZ...GGW...
LAT...LON 47590599 48190480 48390391 48410310 48030270 47660296
47200341 46780515 46750577 47320626 47590599