What is a "Cut Off Low" and why in the World did it take "forever" to leave?

The month of September started off as a dry, and somewhat mild month as our temperatures were near 90 on the first day of the month. Somewhat cooler, yet dry weather, continued from the early part of the month through about the mid-way point until "whammo", here comes a "cut off low pressure system".

You may be asking, what exactly is this and what does it mean? Well, have a quick read below and get caught up on it.  :)
 

Cut off low pressure systems happen when they develop in either extremely weak upper level wind conditions (jet stream, around 40,000 feet in the air) or away from the jet stream altogether (most common). Without some kind of steering mechanism, such as the wind from the jet stream, they basically just drift from day to day with little, if any movement. This is exactly what happened from September 20 through September  27, which is why we had so much cloud cover and occasional rain during this time. In addition, factors such as a northeast wind, thick cloud cover and rain, pushed temperatures well below normal with most highs getting stuck in the 40's on September 22, the day before fall started.

 

You can view this animating by visiting:

www.nnvl.noaa.gov/MediaDetail.php

 

Read More Blogs

Join the Conversation!

To comment, the following rules must be followed:

  • No Obscenity, Profanity, Vulgarity, Racism or Violent Descriptions
  • No Negative Community Comparisons
  • No Fighting, Name-calling, or Personal Attacks
  • Multiple Accounts are Not Allowed
  • Stay on Story Topic

Comments may be monitored for inappropriate content, but the station is under no legal obligation to do so.
If you believe a comment violates the above rules, please use the Flagging Tool to alert a Moderator.
Flagging does not guarantee removal.

Multiple violations may result in account suspension.
Decisions to suspend or unsuspend accounts are made by Station Moderators.
Questions may be sent to comments@wsaw.com.
Please provide detailed information.
All comments must adhere to the WSAW.com discussion rules.

powered by Disqus
WSAW-TV 1114 Grand Ave. Wausau, WI 54403
Copyright © 2002-2014 - Designed by Gray Digital Media - Powered by Clickability
Gray Television, Inc.