Summary for January, 2004

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HEADLINE:SOON TURNING MILD/DAMP/BREEZY: CHILLIER MID-MONTH-----------------

(last updated: 21/1800 xxxxx; xx = provisional data)

NB: UPDATES FOR 22ND WILL BE DELAYED DUE TO EQUIPMENT CHANGES

Location: Tawfield/Wooden Hill area of SW Bracknell, Berkshire, UK

Altitude 80 m (other location details see signature file appended)

(temperatures [standard screen] degC; rainfall/melted snowfall mm; snow depths cm; )

Readings taken at 0900 and 1800 UTC. Where the NIGHT maximum

or DAY minimum are significantly different from figures hereunder, this will be noted in the accompanying text summary. There are now two mean daily temperatures shown: the first is the mean of the average day maximum and average night minimum (A), and the second is the average of the 24hr maximum and 24hr minimum (B .. as kept formerly) .. the anomalies are shown for this latter figure from 1971-2000 estimated Long Term Averages. Rainfall is credited to the 24hr day beginning 0900 UTC.

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TEMPERATURES ETC.

Highest day maximum (date):... 11.0(10xx)

Highest 24hr maximum (date):.. 11.5(10xx)

Lowest night minimum (date):...-02.7xx(03xx)

Lowest 24hr minimum (date):...-02.7xx(03xx)

[ Lowest day maximum (date):... 02.8xx(03xx)]

[ Highest night minimum (date):... 10.0xx(11xx)]

A. Mean Day (09-18Z) maximum: ... 08.0xx

A. Mean Night (18-09Z) minimum: ... 04.1xx

A. Mean of Day Max & Night min: ... 06.1xx

B. Mean 24hr maximum:... 08.5

B. Mean 24hr minimum:... 03.5

B. Mean of 24hr max & min:... 06.0 (+2.1 on eLTA)

(data below relate to 24 hr day beginning 09Z on date given)

Nr of days minimum at 09UTC <0.0degC:05xx[dates: 03-04,17-19,xx]

Nr of days maximum at 09UTC >=21degC:xx

Nr of days maximum at 09UTC >=25degC:xx

Nr of days maximum at 09UTC >=30degC:xx[dates: xx,xx,xx]

(Notes relating to temperature & allied observations:

6th/7th (night): cold evening, with early night min (Tn 5.6, Tg 2.8), temperature rising unsteadily rest of night; 10th: 24hr max (11.5) occurred during *evening* of 10th; 18th: 24hr max (7.6) occurred 19/09Z;

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PRECIPITATION (PPN/mm)

Total rainfall/melted snow etc:... 057.3 (87% of eLTA of 66mm)

Highest 24hr total:............... 12.0(07xx)

No. days PPN total >= 0.2:15xx

No. days PPN total >= 1.0:11xx

No. days PPN total >=10.0:01xx

No. days PPN total >=25.0:xx

(Notes relating to precipitation & allied observations:

1st/2nd (overnight): ocnl r; 4th: ocnl r early hours; 5th: r(slight)/tempo r 0630Z to 0950Z; 6th: r(slight)/ocnl r 0645-0845Z; 8th: r(R) 06-09Z, still raining, with r(R) until 1045Z; pr during mid/late aftn; 9th: pr/r 1345Z to 1425Z; 9th/10th (overnight) r(slight) much of night; 10th/11th (night/early morning): r(R) much of night, with gusty winds – clearance occurred around 0905Z; 11th: pr(slight) from ~1230Z; 12th: r(slight) from 0545Z, r 08Z to 11Z, then slight rain to 13Z, then intermittent rain to 14Z; 12th/13th: overnight strong winds/r(R), peaking ~0345Z; 14th: ocnl r early hrs to about 0745Z; 14th: pr 1345Z-1420Z; 15th: ir(slight) from ~15Z, r(slight) from 1720Z, soon becoming r, which finished about 2115Z; 17th (evening) v.slight rain shower 17/1900-1915Z (tr); 19th:ocnl r(slight), tempo r 0930Z to ~15Z; 20th: dr(slight) ocnl dr/r through day;

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OTHER TOTALS

Number of days thunder heard: (dates).. xx (xx)

Number of days hail < 0.5cm diameter:.. xx

Number of days hail >=0.5cm diameter:.. xx

Number of days snow/rain & snow:....... xx

Number of days snow lying at 09UTC:.... xx

Deepest snow cover (date,s):........... xx(dd,dd)

Number of days fog (visibility < 1km @ 09UTC).. xx

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Additional comments on the weather in January, 2004

8th: squally BF6, ocnl 7 during day; 13th: squally BF6, tempo 7 08Z to 10Z; 15th/16th (overnight): windy, at least BF7 for a short time;

... these data can also be viewed at:-

http://homepage.ntlworld.com/metinfo/wxdata/climintro.htm

Tn Tx Tg RR Tn Tx RR RR24hr Remark code (below)

(09Z) (09Z) (09Z)(18-09Z) (18Z) (18Z) (09-18Z) (from 09Z today)

01 01.4 04.8 01.1 06.2 04.7 07.6 00.2 02.1 A

02 04.5 07.2 03.9 01.9 03.2 04.6 tr tr -

03 -02.7 03.2 -03.7 - -00.9 02.8 tr 00.9 B

04 02.8 04.9 02.5 00.9 04.9 07.6 - 00.7 C

05 02.6 06.6 00.6 00.7 06.6 09.9 00.3 02.2 D

06 09.2 10.3 08.2 01.9 07.5 10.5 tr tr E

07 05.6 09.5 02.8 tr 07.2 09.2 tr 12.0

08 07.4 09.8 06.5 12.0 06.1 10.5 04.1 04.1

09 04.5 06.1 03.1 - 04.5 08.7 00.3 01.5

10 03.6 07.7 01.8 01.2 07.7 11.0 tr 07.3

11 10.0 11.5 08.9 07.3 05.1 10.0 00.7 06.3 FG

12 03.7 06.6 02.5 05.6 05.7 07.2 05.7 08.4

13 05.3 10.5 03.4 02.7 06.4 08.5 tr 01.8

14 03.3 06.4 02.0 01.8 02.6 07.0 00.9 00.9

15 01.8 03.3 -00.1 - 02.1 08.1 01.2 06.8

16 06.1 08.1 04.8 05.6 06.4 07.7 - -

17 -00.4 06.4 -03.6 - -00.3 05.0 tr(x) tr HI

18 -01.3 04.6 -03.7 tr -01.1 04.6 - -

19 02.9 07.6 01.6 - 07.6 10.0 00.9 00.9 J

20 08.8 09.9 07.4 tr 09.0 09.4 00.9 01.4

21 07.7 09.2 07.0 00.5 07.6 09.0 - xx.x

22 xx.x xx.x xx.x xx.x xx.x xx.x xx.x xx.x DELAYED UPDATE

23 xx.x xx.x xx.x xx.x xx.x xx.x xx.x xx.x

24 xx.x xx.x xx.x xx.x xx.x xx.x xx.x xx.x

25 xx.x xx.x xx.x xx.x xx.x xx.x xx.x xx.x

26 xx.x xx.x xx.x xx.x xx.x xx.x xx.x xx.x

27 xx.x xx.x xx.x xx.x xx.x xx.x xx.x xx.x

28 xx.x xx.x xx.x xx.x xx.x xx.x xx.x xx.x

29 xx.x xx.x xx.x xx.x xx.x xx.x xx.x xx.x

30 xx.x xx.x xx.x xx.x xx.x xx.x xx.x xx.x

31 xx.x xx.x xx.x xx.x xx.x xx.x xx.x xx.x

Remarks:

A. night max (4.8) occurred at 01/09Z;

B. day max (2.8) occurred at 03/18Z, continued rising through night;

C. night max (4.9) occurred at 04/09Z, with continued advection mild wx;

D. night max (6.6) occurred at 05/09Z;

E. night max (10.3) occurred at 06/09Z;

F. night max (11.5) also 24hr max for 10th, occurred mid-evening 10th.

G. day max (10.0) occurred at 11/09Z

H. tr recorded 17/09-17/18Z from melted overnight hoar frost

I. tr recorded 17/18-18/09Z from very light shower evening 17th

J. night min (2.9) early evening; night max (7.6) at 19/09Z