Convective Outlook: Fri 21 Sep 2018 |
|
What do these risk levels mean? |
Convective Outlook
VALID 06:00 UTC Fri 21 Sep 2018 - 05:59 UTC Sat 22 Sep 2018
ISSUED 13:44 UTC Thu 20 Sep 2018
br> br>ISSUED BY: Dan
Upper trough will swing eastwards across the British Isles on Friday, with cold air aloft atop warm SSTs steepening lapse rates and generating a few hundred J/kg CAPE. Numerous showers will affect many parts, generally most frequent in exposed western areas. A few isolated lightning strikes, gusty winds and small hail will be possible from the most intense cells. Increased ridging from the west will result in weakening convection by the evening hours.