Jump to content
Sign in to follow this  
Weather-history

February anticyclonic spells favour retrogression?

Recommended Posts

I made this post 7 years ago

I have noted from looking at the weather archives that notable anticyclonic spells during February have a tendency to favour retrogression. As always, there are exceptions to the rule.

Some examples.

According to Philip Eden, the three most anticylonic Februarys since 1880 are 1932

Rrea00119320218.gif

The high moves northwards allowing a cold easterly flow

Rrea00119320228.gif

1965: a classic

Rrea00119650217.gif

The start of a cold wintry first half to March

Rrea00119650226.gif

1934

Rrea00119340217.gif

A wintry end to a pretty snowless winter

Rrea00119340226.gif

Other examples

1890

Rrea00118900219.gif

Rrea00118900228.gif

1909

Rrea00119090220.gif

Rrea00119090228.gif

1924

Rrea00119240220.gif

Rrea00119240228.gif

1942

Rrea00119420217.gif

Rrea00119420222.gif

1944

Rrea00119440220.gif

Rrea00119440227.gif

1993

Rrea00119930216.gif

Rrea00119930227.gif

2004

Rrea00120040220.gif

Rrea00120040226.gif

Edited by Weather-history
  • Like 3

Share this post


Link to post
Share on other sites

It often seems like rather slack and uneventful vaguely easterly spells are a common feature.

Share this post


Link to post
Share on other sites

2008 didn`t quite make it but it was a glorious spell of weather,with plenty of overnight ar frosts and chilly to cold easterly days perfect.

http://www.wetterzentrale.de/pics/archive/ra/2008/Rrea00120080213.gif

http://www.wetterzentrale.de/pics/archive/ra/2008/Rrea00120080214.gif

Edited by Snowyowl9

Share this post


Link to post
Share on other sites

It depends on the position and potency of the Jetstream, an amplified flow enables the high to retrogress either NE or NW, a flatter jet tends to sink the high..

 

Late February into March can often see a rather meridional jet flow with amplification so its perhaps no surprise to see the evolutions that occur. Even the infamous mild euro high of Feb 1998 ended with a northerly and cold start to March.

  • Like 1

Share this post


Link to post
Share on other sites

Join the conversation

You can post now and register later. If you have an account, sign in now to post with your account.
Note: Your post will require moderator approval before it will be visible.

Guest
Reply to this topic...

×   Pasted as rich text.   Restore formatting

  Only 75 emoji are allowed.

×   Your link has been automatically embedded.   Display as a link instead

×   Your previous content has been restored.   Clear editor

×   You cannot paste images directly. Upload or insert images from URL.

Sign in to follow this  

×
×
  • Create New...