Jump to content
Snow?
Local
Radar
Cold?
IGNORED

Exceptionally Mild January Of 1921


Weather-history

Recommended Posts

Posted
  • Location: Irlam
  • Location: Irlam

For the CET, January 1916 is the mildest January on record. 5 years later, there was another exceptionally mild January.

January 1921 was a very mild zonal month, high pressure rarely held sway as Atlantic lows pushed in from the west. For most of the period, the UK was in a mild west to southwesterly flow and as such frosts and snowfalls were limited and maxima and minima were above average. January 1921 was a much wetter month than January 1916 as Atlantic systems made bigger inroads to the south than they did in 1916.

The 4th and 9th were very mild days with maxima into the low teens, 4th: 15.6C at Llandudno

20th-30th: 8.5C

25th December 1920 - 30th January 1921: 7.7C

Rslp19210104.gif

January 1921: 7.3 (+3.6) 1796 (7.3)

CET max mean: 9.4

CET min mean: 5.2

First half: 6.8

Second half: 7.8

Highest CET maximum: 13.3 (9th)

Lowest CET minimum: -2.4 (15th)

Scotland mean: 4.1

Northern Ireland: 6.0

90 years ago

Hereford

Mean maximum: 9.6C

Mean minimum: 4.6C

Mean: 7.1C

The minimum at the south Kensington roof station never fell below freezing from 17th December to 3rd February

Sheepstor in Devon at 749ft never recorded any snowfall during the month.

Maxima of between 10.6C and 15C recorded during the month

Falmouth: 24 days

Dublin Phoenix Park: 22 days

Isle of Grain, Kent: 20 days

Birr Castle: 20 days

Kew: 19 days

Nottingham: 19 days

Camden Square

Mean temp 7.8C (+4.1C)

5 days had a mean above 10C

  • Like 2
  • Thanks 1
Link to comment
Share on other sites

  • 9 years later...
Posted
  • Location: Glyn Ceiriog. 197m ASL
  • Weather Preferences: Snow in winter, good sun at other times with appropriate rain.
  • Location: Glyn Ceiriog. 197m ASL
2 minutes ago, Weather-history said:

100 years ago

1921?

Link to comment
Share on other sites

Posted
  • Location: Glyn Ceiriog. 197m ASL
  • Weather Preferences: Snow in winter, good sun at other times with appropriate rain.
  • Location: Glyn Ceiriog. 197m ASL
4 minutes ago, Weather-history said:

100 years since the joint 2nd mildest January on record for the CET

Ahh, makes sense now.  Would be interesting to know why, is there data to explain? 

Link to comment
Share on other sites

Posted
  • Location: Irlam
  • Location: Irlam
1 minute ago, snefnug said:

Ahh, makes sense now.  Would be interesting to know why, is there data to explain? 

It looks like it was a weak La Nina and solar activity was declining.  The bigger question is why was high pressure so dominate during 1921 causing it to be such a dry year?

  • Like 1
Link to comment
Share on other sites

Posted
  • Location: halifax 125m
  • Weather Preferences: extremes the unusual and interesting facts
  • Location: halifax 125m

1921 was a very dry year and very sunny.With the exception of an indifferent August it was arguably the best extended summer on record with dry,sunny and warm weather from April until the end of October.

 

Edited by hillbilly
  • Like 1
Link to comment
Share on other sites

Posted
  • Location: Cheshire
  • Location: Cheshire

Brazell's very good book on London Weather to 1964 actually has Jan 1921 marginally milder than 1916, + 6.4F difference from mean average compared with + 6.3. The overall difference over the year was + 1.6 (a cold November by all accounts) and there was not to be another full year with a '+' difference until 1933.  

Link to comment
Share on other sites

Posted
  • Location: Broxbourne, Herts
  • Weather Preferences: Snow snow and snow
  • Location: Broxbourne, Herts

During this time of recognised warming, it's amazing to think that only two of the top ten warmest Januarys have occurred in the last 30 years, and none in the last decade (the same applies to Februarys)

The clustering always fascinates me.   For example the Januarys of 1916 and 1921 are the warmest in over 350 years of recorded CETs yet occurred within five years of each other. The two warmest Januarys in the past 30 years occurred in 2007 and 2008. Consecutive years of CETs greater than 6C that had neither occurred in the 16 previous years nor will have occurred in the 12 years since (barring some currently unmodelled remarkable warming taking place over the rest of this month!)   

 

 

 

  • Like 1
Link to comment
Share on other sites

Posted
  • Location: Broxbourne, Herts
  • Weather Preferences: Snow snow and snow
  • Location: Broxbourne, Herts
3 hours ago, Timmytour said:

During this time of recognised warming, it's amazing to think that only two of the top ten warmest Januarys have occurred in the last 30 years, and none in the last decade (the same applies to Februarys)

The clustering always fascinates me.   For example the Januarys of 1916 and 1921 are the warmest in over 350 years of recorded CETs yet occurred within five years of each other. The two warmest Januarys in the past 30 years occurred in 2007 and 2008. Consecutive years of CETs greater than 6.5C that had neither occurred in the 16 previous years nor will have occurred in the 12 years since (barring some currently unmodelled remarkable warming taking place over the rest of this month!)   

 

 

 

Apologies....post corrected as above in bold and italics

Link to comment
Share on other sites

Create an account or sign in to comment

You need to be a member in order to leave a comment

Create an account

Sign up for a new account in our community. It's easy!

Register a new account

Sign in

Already have an account? Sign in here.

Sign In Now
×
×
  • Create New...