* WHAT…Intermittent dense fog with visibility one quarter mile or
less.
* WHERE…Orange County Coastal Areas and San Diego County Coastal
Areas.
* WHEN…Until 10 AM PST this morning.
* IMPACTS…Low visibility could make driving conditions hazardous.
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SPC Apr 21, 2025 1300 UTC Day 1 Convective Outlook
SPC 1300Z Day 1 Outlook Day 1 Convective Outlook NWS Storm Prediction Center Norman OK 0730 AM CDT Mon Apr 21 2025 Valid 211300Z - 221200Z ...THERE IS A MARGINAL RISK OF SEVERE THUNDERSTORMS ACROSS PARTS OF THE UPPER OHIO VALLEY AND LOWER GREAT LAKES...AND PORTIONS OF THE SOUTHEAST... ...SUMMARY... Isolated strong to severe thunderstorms are possible today across the upper Ohio Valley/lower Great Lakes and parts of the Southeast. Damaging winds and marginally severe hail are the primary risks. ...Upper Ohio Valley to the Lower Great Lakes... An upper trough with an attendant 55-70 kt mid-level jet will advance
SPC – No watches are valid as of Mon Apr 21 12:35:01 UTC 2025
No watches are valid as of Mon Apr 21 12:35:01 UTC 2025.
SPC – No MDs are in effect as of Mon Apr 21 12:35:01 UTC 2025
No Mesoscale Discussions are in effect as of Mon Apr 21 12:35:01 UTC 2025.