SPC Day 4-8 Severe Weather Outlook
Forecast Discussion - Day 4-8
ZCZC SPCSWOD48 ALL ACUS48 KWNS 050936 SPC AC 050936 Day 4-8 Convective Outlook NWS Storm Prediction Center Norman OK 0336 AM CST Wed Feb 05 2025 Valid 081200Z - 131200Z ...DISCUSSION... Medium-range global models appear to be in reasonable large-scale agreement into the first half of day 6 (Monday). At this point, more substantial differences begin to emerge with respect to the amplification of the flow field across the U.S., as the main western U.S. trough begins a slow eastward advance. These differences are significant in that speed and timing of the advance of this system will influence surface cyclogenesis along what has been a persistent, roughly west-to-east baroclinic zone across the south-central and southeastern CONUS. Stronger/inland low development along this front would potential bring an increase in severe-weather potential, but this scenario is far too uncertain at this point to highlight through the second half of the period. Earlier in the period, a frontal low along the surface baroclinic zone is forecast to shift out of the Oklahoma vicinity, and east-northeastward across the Ohio Valley area day 4, before reaching the southern New England coastal vicinity by the start of day 5. However, very weak warm-sector instability is expected at this time, which should preclude severe risk. As the low deepens northward into the Canadian Maritimes, the trailing cold front should settle back into its recently persistent position from the southern Plains to the Southeast, and remain there into the Day 6 period ahead of the advancing western upper trough. Again, with weak instability near the boundary and southward into the warm sector, severe weather is not expected. ..Goss.. 02/05/2025 CLICK TO GET WUUS48 PTSD48 PRODUCT
|