Patchy fog, which was locally dense in some areas, will reduce
visibilities across the Helena Valley through approximately 9 AM
to 10 AM MDT. Travelers should be prepared for visibilities as
low as one quarter of a mile in the densest fog. Slow down, use
low beam headlights, and allow extra spacing between vehicles if
traveling this morning.
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SPC – No watches are valid as of Fri May 23 16:12:01 UTC 2025
No watches are valid as of Fri May 23 16:12:01 UTC 2025.
SPC MD 939
MD 0939 CONCERNING SEVERE POTENTIAL...WATCH UNLIKELY FOR SOUTHERN FLORIDA Mesoscale Discussion 0939 NWS Storm Prediction Center Norman OK 1109 AM CDT Fri May 23 2025 Areas affected...southern Florida Concerning...Severe potential...Watch unlikely Valid 231609Z - 231915Z Probability of Watch Issuance...20 percent SUMMARY...Strong thunderstorm development, possibly including an isolated supercell or two, may initiate during the next 1-2 hours along the Atlantic coast sea-breeze, particularly near or north-northwest of the Palm Beach vicinity, before gradually increasing through late afternoon across the interior southern peninsula. DISCUSSION...Deepening convective development is evident along the Atlantic coast sea-breeze, south of Melbourne into the Palm Beach vicinity.
SPC May 23, 2025 1300 UTC Day 1 Convective Outlook
SPC 1300Z Day 1 Outlook Day 1 Convective Outlook NWS Storm Prediction Center Norman OK 0750 AM CDT Fri May 23 2025 Valid 231300Z - 241200Z ...THERE IS A SLIGHT RISK OF SEVERE THUNDERSTORMS ACROSS PARTS OF THE SOUTHERN/CENTRAL PLAINS... ...SUMMARY... Isolated to scattered severe thunderstorms should develop across parts of the southern and central Plains this afternoon through the overnight hours, with large hail and severe gusts the main threats. Isolated very large hail greater than 2 inches in diameter may occur. ...Central/Southern Plains... In the wake of overnight/early morning convection across parts of central/south TX, low-level airmass recovery