Skip to main content.

Storm Prediction Center Outlooks - Days 4 - 8




<Day 3 Outlook
Move cursor over product parameter name to display the graphic below.
Day 4-8 Outlook
Day 4 - 8 Outlook
D4Tue December 18th 2018 - Wed December 19th 2018 D7Fri December 21st 2018 - Sat December 22nd 2018
D5Wed December 19th 2018 - Thu December 20th 2018 D8Sat December 22nd 2018 - Sun December 23rd 2018
D6Thu December 20th 2018 - Fri December 21st 2018 (All days are valid from 12 UTC - 12 UTC)

Note: A severe weather area depicted in the Day 4-8 period indicates a 30% or higher probability for severe thunderstorms within 25 miles of any point.

PREDICTABILITY TOO LOW is used to indicate severe storms may be possible based on some model scenarios. However, the location or occurrence of severe storms are in doubt due to: 1) large differences in the deterministic model solutions, 2) large spread in the ensemble guidance, and/or 3) minimal run-to-run continuity.

POTENTIAL TOO LOW means the threat for a regional area of organized severe storms appears highly unlikely during the entire period (e.g. less than a 30% probability for a regional severe storm area across the CONUS through the entire Day 4-8 period).

Images courtesy of the NWS Storm Prediction Center

 Convective Outlook Discussion - Day 4-8
Convective Outlook unavailable, please try later.

NWS Storm Prediction Center Day 4-8 Outlook