We're not done with the storms yet(!). In fact -- as an upper level trough of low pressure moves into the area Tue. & lingers Wed. -- storms could become even more widespread & a little stronger, especially from a strong winds & hail standpoint. Given what looks to be quite a bit of heating Tue. morning + the approach of the upper level trough, storms should fire earlier in the day Tue. So keep an eye to the sky. It does look like a surface wind shift to the east/northeast by Fri. into the weekend could give us a break from the extremely heavy storms & bring some cooler temps. to the area as well. The onshore flow could still, however, allow for a few showers moving west off the Atlantic but the overall pattern would not be as wet.
So the S'side now has had near 20" of rain since the last week of May!!
Quite the fascinating cloud formations over the First Coast Mon. evening. A large roll cloud moved across Duval Co. This was a cloud formed by cooler air that was pushed out of t'storms in Nassau Co. & extreme Northern Duval Co. But what really caught the attention of a lot of people, was the textbook mammatus clouds. The first 12 pic's below are all mammatus ("coming at us"). Mammatus form because of sinking air rather than the usual rising air that forms clouds. Click here for a good explanation. The diagram below is courtesy Jeff Haby. While our storms were not supercells, the fundamental development of mammatus is caused in the same way. 'A' in the diagram represents the mammatus. Photos are from Candace Mickler, San Marco...Lina Bergman, Orange Park... Lori Cheanvechai, Jax S'side...Ty Silcox, Orange Park...Brad Raney, Julington Creek...Ed Milone, Fleming Isl....James Fletcher...Joel Lotz, S'side...Mellinda Smith, St. Johns Co....Christy, Hilliard...Brendon Beckman, Middleburg.
The next photo is from Kris Thomas, Murray Hill showing a towering cumulus soon to mature into a cumulonimbus...the Martin Family in St. Marys, Ga....then trees down on the Simpson's home near JTB, Jax S'side (probably microburst as wind were measured near 70 mph from the same cell about 20-25 min. earlier)....+ a photo of trees down in the same area taken by Cindy Chambers. It's worth noting that trees will fall more easily now that the ground is saturated.