Wet January

This forum is for comments about the weather spanning several days, developing phenomena eg drought, comparisons with previous years, local climatic features eg Cheshire Gap showers, and anything that does not fit any of the other forums.

Wet January

Postby Stephen Burt » 2014 Jan 25, 18:31

Here in southern England, after a very wet December we've also had a very wet January. My December total of 127 mm (177% 1981-2010 average) was the wettest since 1989. January's total has now surpassed December's, with 127.5 mm to 0900 today (and a further 1.2 mm in showers this afternoon). It is already the fourth-wettest January in 150 years of local rainfall records, needing only another 3 mm to become the second-wettest - which looks certain to happen tomorrow.

Our wettest January in 150 years was 1995, with 149 mm. That looks possible but unlikely, although with a fairly deep depression sitting over us for the next few days, a day or two of heavy and persistent showers could see 1995's total exceeded. The UKMO 5 day forecast suggests easterlies setting in mid-week next week, and thus drier, but ECMWF has only a temporary break in the persistently unsettled westerly flow - despite the western Russian high being above 1052 mbar by this time next week.

The two (calendar) month total stands at 256 mm to date (37% of our annual average of 697 mm). In recent years we saw 263 mm in Nov-Dec 2009 and 284 mm in Nov-Dec 2002. The highest on the 152 year local record was 305 mm in Oct-Nov 1865, which looks very unlikely to be surpassed - although of course it should be remembered that the first half of December 2013 was almost dry.

SB
-----
Stratfield Mortimer, Berkshire - central southern England
51.4°N, 1.0°W, 60 m AMSL, station grade A - AAAA47R
Records commenced here 1987 - local records available back to 1862
The Weather Observer's Handbook: www.measuringtheweather.com
Stephen Burt
 
Posts: 247
Joined: 2011 Dec 02, 19:36
Location: Stratfield Mortimer, Berkshire; a well-exposed rural site, 10 km SW of Reading

Re: Wet January

Postby Graham Easterling » 2014 Jan 25, 20:48

Here in southern England, after a very wet December we've also had a very wet January. . . January's total has now surpassed December's, with 127.5 mm to 0900 today (and a further 1.2 mm in showers this afternoon). It is already the fourth-wettest January in 150 years of local rainfall records, needing only another 3 mm to become the second-wettest - which looks certain to happen tomorrow. Our wettest January in 150 years was 1995, with 149 mm.


In Penzance it is certain to be the wettest January in my 24 years of records. Wettest currently is 1996 with 199.9mm, 190.7mm has fallen so far this month, 138% of the 1981-2010 norm. This percentage is not particularly high, there clearly hasn't been a particularly wet January in the period of my records.

My December total of 127 mm (177% 1981-2010 average) was the wettest since 1989.


November and December are the wettest months of the year in Penzance. These months can see some very impressive rainfall totals. December 2013 was not exceptional, with 177.6mm or 124% of normal. This made it only the 8th wettest in the last 23 years, and significantly drier than 2012 when there was 243.7mm. (December 1999 saw 276.5mm). This winter (so far) the only significant flooding has been by the sea, local rivers have been nowhere near the levels of last winter when there was extensive flooding, particularly at Newlyn and Helston.

The two (calendar) month total stands at 256 mm to date (37% of our annual average of 697 mm). In recent years we saw 263 mm in Nov-Dec 2009 and 284 mm in Nov-Dec 2002. The highest on the 152 year local record was 305 mm in Oct-Nov 1865, which looks very unlikely to be surpassed - although of course it should be remembered that the first half of December 2013 was almost dry.


The two (calendar) month total here is currently 368.3mm, fairly impressive considering how dry the 1st 13 days of December were. The highest 2 month total since my records started in 1991 being November/December 2002 when a staggering 543.9mm fell. Equally impressive was the 889.6mm which fell in the last 4 months of 2000, an average of 222.4mm per month!

So this period has not been as noteworthy here as it has been further east in southern England. The difference this winter appears to be that the rain bearing fronts have not weakened as they've headed east as much as they normally do.
Graham

Penzance Weather Station
Grid Ref:
SW464231 - Post Code: TR18 4TP
19m AMSL - Aspect SSE
In a SE - NW orientated valley

23 Years of Penzance Weather Records : http://penzanceweather.atspace.com/weather.html
Graham Easterling
 
Posts: 316
Joined: 2011 Nov 30, 20:29
Location: Penzance, Cornwall

Re: Wet January

Postby brugge » 2014 Jan 26, 13:23

For a Maidenhead perspective see the top stories at
http://www.met.reading.ac.uk/~brugge/mhdweather.html

Roger
brugge
 
Posts: 24
Joined: 2011 Nov 12, 15:23

Re: Wet January

Postby John Oliver » 2014 Jan 26, 21:09

The January rainfall up to midday today (26th) at Dorchester (south Dorset) has now reached 216mm beating the previous record for the month of 213.4mm set in 1906 and is 201% of the average.

The total rainfall since December 12th now stands at 428mm and represents 43% of the annual average.

John
John Oliver
 
Posts: 52
Joined: 2012 Feb 04, 09:49

Re: Wet January

Postby Martin Rowley » 2014 Jan 27, 17:54

... To rainfall data 27/0900Z Jan 2014 [ 27/0600Z for Hurn ]

Total January rainfall West Moors = 214 mm (251% of eLTA 1981-2010).
Nearby Hurn = 208 mm, easily the wettest January in the published 1957+ record (Met O web site), beating the previous wettest January (1995) figure of 166 mm.

At Hurn, December & January combined total = 400 mm, easily beating the 339 mm in the notoriously wet autumn/winter seasons of 2000/2001.

Our total rainfall over these two months = 400.8 mm, which represents 47% of the eLTA 1981-2010.

Martin.
Martin Rowley
West Moors, East Dorset [ altitude: 17 m/56' ]
NGR SU 082 023: postcode BH22 0GB
50deg49min15secN, 01deg53min03secW
Martin Rowley
 
Posts: 154
Joined: 2011 Nov 25, 12:54

Re: Wet January

Postby Martin Rowley » 2014 Jan 31, 21:11

Martin Rowley wrote:... To rainfall data 27/0900Z Jan 2014 [ 27/0600Z for Hurn ]

Total January rainfall West Moors = 214 mm (251% of eLTA 1981-2010).
Nearby Hurn = 208 mm, easily the wettest January in the published 1957+ record (Met O web site), beating the previous wettest January (1995) figure of 166 mm.

At Hurn, December & January combined total = 400 mm, easily beating the 339 mm in the notoriously wet autumn/winter seasons of 2000/2001.

Our total rainfall over these two months = 400.8 mm, which represents 47% of the eLTA 1981-2010.

Martin.


... now to rainfall data 31/1800Z (Hurn only, based on SYNOP data)

Total January rainfall Hurn = 237 mm: there's going to be more than that up to 0900GMT tomorrow as we had some heavy rain earlier this evening & more pockets of heavy showers are forecast for tonight.

For December & January combined total = 429 mm, exceeding the previous highest by a considerable margin (see above for figure/dates)

When set against a climatological winter (DJF), the figure of 429 mm now exceeds all previous high totals (in a record 1957+), with the exception of 1989/90, when the figure was 507 mm.

Martin.
Martin Rowley
West Moors, East Dorset [ altitude: 17 m/56' ]
NGR SU 082 023: postcode BH22 0GB
50deg49min15secN, 01deg53min03secW
Martin Rowley
 
Posts: 154
Joined: 2011 Nov 25, 12:54

Re: Wet January

Postby Graham Easterling » 2014 Feb 01, 13:16

Final total in Penzance 256.4mm. The final day saw 29.7mm, topped up by some squally hail/rain showers last night, shattering my previous January record by 56.5mm. (Records start 1991)
Graham

Penzance Weather Station
Grid Ref:
SW464231 - Post Code: TR18 4TP
19m AMSL - Aspect SSE
In a SE - NW orientated valley

23 Years of Penzance Weather Records : http://penzanceweather.atspace.com/weather.html
Graham Easterling
 
Posts: 316
Joined: 2011 Nov 30, 20:29
Location: Penzance, Cornwall

Re: Wet January

Postby Stephen Burt » 2014 Feb 01, 23:02

Final total here 165.2 mm, 237% of the 1981-2010 normal and a good 10% above the previous wettest January in over 150 years local records - namely 149.0 mm in January 1995. This was also the second-wettest month on my 42 year personal record (starting in Warwickshire in 1971 and, since 1977 in Berkshire) - only December 1989, with 169.5 mm here, tops that.

The two (calendar) month total Dec+Jan was a remarkable 293 mm (42% of our annual average of 697 mm). The highest in recent years has been 284 mm in Nov-Dec 2002 and before that 288 mm in Oct-Nov 1960. This represents the highest two month total of any since Oct-Nov 1865, which received 305 mm.

The duration of rainfall was also exceptional in January - 210 hours recording 0.2 mm or more. Since my AWS records began in 1993, no month has previously seen more than 189 hours with rain recorded.

Despite this, sunshine was 26% above normal - almost 79 hours, close to February's average in fact.

SB
-----
Stratfield Mortimer, Berkshire - central southern England
51.4°N, 1.0°W, 60 m AMSL, station grade A - AAAA47R
Records commenced here 1987 - local records available back to 1862
The Weather Observer's Handbook: www.measuringtheweather.com
Stephen Burt
 
Posts: 247
Joined: 2011 Dec 02, 19:36
Location: Stratfield Mortimer, Berkshire; a well-exposed rural site, 10 km SW of Reading


Return to Everything Else Weatherwise



Who is online

Users browsing this forum: No registered users and 1 guest

cron