All Weather News

Severe Weather (MODERATE RISK WEDNESDAY ) and Heavy Snow Continues

Tuesday April 16th, 2013

Look at the beautiful thunderstorm below from @seanlc out of Alvord, TX! The flat, rain free section of the storm is the updraft, which was strong enough to support near 2″ diameter hail nearby. We may see more strong to severe storms like this over the coming days. See below for more details.

Large Storm Developing…

The water vapor imagery below shows the developing storm over the southwest corner of the nation. Note the darker “U” shape near California, Nevada and into the Four Corners Region.

This is what it looks like on the upper levels weather maps. The 500mb vorticity map (atmospheric spin) shows the large trough of low pressure in the Southwest. There is a huge temperature contrast on either side of the jet stream; the clash in these air masses causes wild weather. In our case this week, severe storms and heavy snow will be on the top of our list.

Big Temp Contrasts

This is an interesting map… The wind flow across the nation can show certain weather features that may be hard to pick out on other weather maps. Note the boundary that has set up from near Texas to the Great Lakes Region.

Temperature Extremes

Look at those temperatures across the country and especially across middle part of the country.

Can you believe that we’re still dealing with temps nearly 15° to 30° cooler than average. YIKES! Where’s Spring??

Severe Weather Threat

There will be several days of severe weather potential through the week. Wednesday looks like the most significant severe weather day with tornadoes possible across the middle part of the country.

Severe Threat Tuesday

Severe Threat Wednesday

Severe Threat Thursday

Heavy Rain/Flooding Potential

Take a look at NOAA’s HPC 3 day precipitation forecast. Note the heavy swath from the middle Mississippi Valley to the Great Lakes region. This suggests that there will be a good 2″ to 4″+ possible through AM Friday, which may help to promote flooding/flash flooding potential.

Heavy Snow Continues

It appears that Old Man Winter won’t let go… We’ve been dealing with several heavy snow dumps as of late and we’re not done yet. Our latest storm dropped 7.0″ of snow in Denver on Monday, which brought them to a seasonal snow tally to nearly 70″ – that’s nearly 15″ above normal!

Cheyenne, WY

Rapid City, SD

Heavy Snow in Rapid City, SD

We’re nearing double the average snowfall in Rapid City, SD. It’ll be interesting to see how much this next storm brings us! Latest forecasts suggests another 12″+ in spots!!

Winter Weather Headlines

Winter weather headlines have been posted as far north as west central MN. The potential of shovelable snow looks to be possible across parts of Minnesota/Wisconsin over the coming days, so I expect to see additional watches/warning/advisories in the near future… stay tuned!

Snow Potential

Snow potential over the next 3 days look impressive once again. According to the RPM model, there could be snow even in Iowa!

Thanks for checking in on this Tuesday, have a great rest of your week!

Don’t forget to follow me on Twitter @TNelsonWNTV

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