March 2015 Stats

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March 2015 Stats

Postby Eddy Graham » 2015 Apr 03, 20:33

Stornoway Town: March 2015

Mean max: +8.7C
Highest Max: +11.1C on 7th
Lowest Max: +3.0C on 2nd

Mean min: +2.3C
Highest Min: +7.5C on 7th
Lowest Min: -0.6C on 18th, 25th
Lowest grass: -4.2C (25th)

Mean Temp: +5.5C
Diff: +0.5C (1873-2010), -0.1C (SYY 03026, 1981-2010)

Precip: 197.8mm (170% / 217%)
Wettest: 30.3mm on 6th

Thunder 0
Hail 10
Snow Fall 9
Snow Lying 3
Grass Frosts 19
Air Frosts 5
Raindays 26
Wetdays 23

Summary:
Another very poor month in Stornoway. With the exception of 5 dry and sunny days 14th-18th inclusive, this was another very wet and wintry month. The precipitation regime for the UK shows some similarities with the remarkable month of March 1990.

A look at the long-term stats shows that it may have been the 4th or 5th wettest March on record in Stornoway, after 1990, 1967 and 1903 and probably the wettest for the last 25 years (since 1990). Annoyingly, the Met Office data for 26/3 to 30/3/2015 is missing, so I cannot work out an exact value for the long-term Airport stats.

This month's photo is actually a (very) short video - which I took (hands-free) on the last day of the month (31st) whilst travelling south from Ledmore Junction towards Ullapool in the NW Highlands of Scotland - the road goes through a mountain pass at about 300m in altitude, where there was much snow and a lorry was stuck on the hill. Not nearly as bad as the Highland blizzard of the same date in 2010, but still a stark reminder that winter is never far away!
https://www.youtube.com/watch?v=xiKIpgUMR4Q

I made another (longer) video here when pulled into a lay-by: https://youtu.be/-CujpKWi-pc

Eddie
Eddie Graham
Stornoway, Na h-Eileanan an Iar (Outer Hebrides), Scotland.

Stornoway town COL station, 20 AMSL, local records back to 1873.
Hebridean Weather Blog: http://bit.ly/1IFAPJa
Twitter Weather Feed: https://twitter.com/eddy_weather
Eddy Graham
 
Posts: 82
Joined: 2012 Jul 18, 17:09
Location: Stornoway, Scotland

Re: March 2015 Stats

Postby Len Wood » 2015 Apr 03, 22:43

Nice video Eddy.
Rarely get anything like that down here.
Made me shiver looking at it.
Len

Wembury, SW Devon coast
N50.33 W4.13
Altitude 83 m asl
Len Wood
 
Posts: 349
Joined: 2012 Jan 28, 16:12
Location: Wembury, coastal SW Devon, 83 m asl

Re: March 2015 Stats

Postby Richard Hunt » 2015 Apr 04, 08:44

MARCH 2015

Absolute Minimum: -1.1°C – Day 09
Highest Minimum: 6.8°C – Day 07
Mean Minimum: 2.7°C

Absolute Maximum: 16.0°C – Day 07
Lowest Maximum: 5.5°C – Day 02
Mean Maximum: 10.2°C

Mean: 6.5°C

Anomaly: -0.1c

Grass Minimum: -4.5°C – Day 09
---------------------------------------------------------------------------
PRECIPITATION:-
Daily Maximum: 6.7mm – Day 26
Monthly Total: 24.1mm
Rain Days >0.2mm: 11
Wet Days >1.0mm: 09
----------------------------------------------------------------------------
BAROMETRIC PRESSURE:-
Maximum: 1034.8mb – Day 04/05
Minimum: 0983.2mb – Day 31
Mean (0900UTC): 1016.9mb
---------------------------------------------------------------------------

Mean Relative Humidity: 67%

Minimum Relative Humidity: 33% - Day 30

Mean Wind Direction: South west

Mean Wind Speed: 8.0 MPH

Maximum Wind Gust: 43 MPH – Day 31
----------------------------------------------------------

Days with:-

Air Frost: 3
Ground Frost: 15
Fog: 1
Thunder/Lightning: 0
Snow Falling: 0
Snow Lying: 0
Hail: 1
Gale: 1
Ice Day: 0
COL Station: 25020.

Watson W-8681 AWS. Standard Stevenson Screen. Maximum and Minimum screen thermometers. Grass minimum thermometer.
5" Copper standard rain gauge. Roof mounted annemometer.
Richard Hunt
 
Posts: 374
Joined: 2012 Jan 27, 19:23
Location: Hornsea, East Yorkshire. 10m AMSL

Re: March 2015 Stats

Postby Eddy Graham » 2015 Apr 05, 22:10

Thanks for that Richard - see, your March temp anomaly is very similar to mine in Stornoway, and in absolute terms your days were only slightly warmer, but your nights were much the same temperature-wise, as mine, despite our distance apart. However, as for precipitation, that's another matter! (i.e. last month was a good example of how temperature anomalies are often national or continental in size, but precip anomalies are frequently only regional or indeed local)
E.
Eddie Graham
Stornoway, Na h-Eileanan an Iar (Outer Hebrides), Scotland.

Stornoway town COL station, 20 AMSL, local records back to 1873.
Hebridean Weather Blog: http://bit.ly/1IFAPJa
Twitter Weather Feed: https://twitter.com/eddy_weather
Eddy Graham
 
Posts: 82
Joined: 2012 Jul 18, 17:09
Location: Stornoway, Scotland


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