December 15 2021
Less than one week from the deadly tornado that hit western Kentucky and many other states, we have another rare December storm system. This may produce more nighttime tornadoes, even over some areas with snow on the ground.
A very active jet stream is working on spring like temps and winter air to produce a massive storm system pushing into the Northern Plains. This is a different region than last week.
Here is a summary of the broad impacts of this event, with maps and videos below.
This large areas of Moderate Risk includes much of mental Iowa, parts of Nebraska, Southeast Minnesota, and western Wisconsin.
The visible satellite earlier showed the snow on the ground in northern Iowa and southern Wisconsin
The circulation is charging through Kansas and Nebraska. We can see the line of severe storms erupt ahead of that vortex and push into Iowa. This is expected to increase in intensity through midnight… So once again severe weather will after dark for many areas.
This contrast of air masses is the driving force for this severe weather event.
The wind at 700 mb are pushing 135 knots…
This is crazy! This can direct the speed of individual storms as well as mix down to the surface!
This looks to be peaking over Iowa and Wisconsin around midnight!
Storm Report: MOVING AT 95 mph!!!!
This is the forward speed of the storm…
These storms are booking it east through #Nebraska. This is no joke folks if your in this area seek shelter now especially ahead of this line. It will come fast. I don’t think I’ve ever seen speeds like that on a warning. #newx pic.twitter.com/0cQQlkjasD
— Erik Taylor (@WeatherErik) December 15, 2021
This is being treated with utmost seriousness. I want to highlight that last week’s storm was advertised well in advance as well.
We cannot emphasize enough the unusual nature of this event. Storms will have the potential to produce 70 mph wind gusts with isolated gusts of 80 mph or higher possible. Tornadoes will be possible and a strong tornado could occur. Seek shelter if warnings are issued! pic.twitter.com/BWvIxVfaI7
— NWS La Crosse (@NWSLaCrosse) December 15, 2021
An apocalyptic winter storm front swallowing Boulder this morning!
In 90 seconds, it went from calm and warm to a wall of wind stronger than anything I have experienced 🤯 pic.twitter.com/0YU8Mq6taV
— David Roche (@MountainRoche) December 15, 2021
Buddy sent this from Turpin pic.twitter.com/P0hG5VxQJO
— Mason Pinion (@MasonPinion) December 15, 2021
Last Winter Recap: My Old Outlook And Your Grades Of My Storm Forecasts
