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#727317
Fri 28 Jun 2024 09:04:AM
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Joined: Feb 2001
Posts: 381,903
Launch Director
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OP
Launch Director
Joined: Feb 2001
Posts: 381,903 |
SPC Jun 28, 2024 Day 4-8 Severe Weather OutlookDay 4-8 Outlook ![](https://www.spc.noaa.gov/products/exper/day4-8/day48prob.gif) Day 4-8 Convective Outlook NWS Storm Prediction Center Norman OK 0400 AM CDT Fri Jun 28 2024
Valid 011200Z - 061200Z
...DISCUSSION... ...D4/Monday: Central/northern Great Plains... A mid/upper-level trough with multiple embedded vorticity maxima is forecast to move eastward across the northern/central Great Plains on Monday. A surface low is forecast to deepen over the Dakotas, along a surface trough. A warm front will lift northward across the central/northern Plains through the day, with very rich low-level moisture in place along/west of the warm front, and east of a weak cold front that will move into the western Dakotas.
Some uncertainty remains regarding the potential for morning convection to limit destabilization with eastward and northward extent. However, moderate to strong buoyancy is forecast to develop from parts of the Dakotas into Nebraska, with increasing low-level and deep-layer shear supporting the potential for organized convection. Scattered thunderstorm development will be possible in the vicinity of the various surface boundaries across the region as midlevel height falls overspread the region. Initial storms may evolve into supercells, with a threat for all severe hazards. Some upscale growth is possible into the evening as storms spread eastward, with a continued severe risk potentially reaching parts of western MN/IA by Monday night.
...D5/Tuesday: East-central Plains into the Upper Midwest... Some severe threat could develop on Tuesday from parts of the east-central Plains into the upper Midwest, in conjunction with the eastward-moving mid/upper-level trough and attendant cold front. Deep-layer shear will remain favorable for organized convection, with potential for strong destabilization across areas where stronger diurnal heating occurs.
However, uncertainty remains rather high regarding the favored corridor for severe thunderstorm development, given model differences in handling of the upper trough, and the potential for extensive antecedent convection. Severe probabilities will likely be needed at some point for parts of the region in subsequent outlooks.
...D6/Wednesday - D8/Friday... Predictability begins to wane regarding the evolution of the surface and upper patterns by mid to late next week. Some severe threat may evolve across the Midwest on Wednesday in association with a cold front. A developing northwesterly flow regime could result in increasing severe potential across the Great Plains by Thursday into Friday, but uncertainty remains high regarding the details.
Read morehttps://www.spc.noaa.gov/products/exper/day4-8/
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