Llansadwrn (Anglesey) Weather Observations from the observer's spreadsheet View using Firefox, Opera or Internet Explorer, with screen resolution 1152 x 864 or larger. Use F11 toggle to fill your screen

Key to observations

	CLIMATOLOGICAL OBSERVATIONS AT LLANSADWRN, ANGLESEY, FOR FEBRUARY 2005
		------09 GMT--->					<-------Air temperature-------->							<---Soil temp--->			<---Earth temp--->			<--State Grd.-->				Rain	Sol	<-------Weather------->						Press	Rain	Fr.	Pch
	DD	N	dd	ff	V	ww	Temp	Dpt	RH	Max	Min	Mean	Gmin	5cm	10cm	20cm	30cm	50cm	100cm	E	C	Gr	SS	mm	mvh	S	L	H	T	G	F	mb	hrs	hrs	evap
	1	8	N	2	4	53	7.7	7.7	100	7.9	7.5	7.7	6.8	7.6	7.7	7.5	7.2	7.2	7.7	1	3	3	0	0.5	1.2	0	0	0	0	0	0	1036	0.4	0.0	0.2
	2	6	NW	1	7	01	5.6	4.9	95	10.0	4.8	7.4	4.0	6.0	6.4	7.0	7.1	7.4	7.8	1	2	3	0	0.7	4.2	0	0	0	0	0	0	1038	0.4	0.0	0.2
	3	8	00	0	3	80	7.8	7.8	100	9.5	5.6	7.6	4.4	7.5	7.4	7.4	7.4	7.5	7.8	1	3	3	0	0.3	3.4	0	0	0	0	0	0	1038	0.0	0.0	0.6
	4	7	SW	5	7	01	7.1	5.8	91	9.3	5.6	7.5	4.2	6.5	6.7	7.2	7.4	7.5	7.9	1	0	0	0	14.3	4.1	0	0	0	0	0	0	1029	9.6	0.0	0.6
	5	7	NW	1	6	01	5.0	5.0	100	8.1	4.9	6.5	4.6	6.0	6.5	7.0	7.2	7.7	8.0	1	2	3	0	0.7	4.5	0	0	4	0	0	0	1014	0.7	0.0	0.3
	6	7	NE	1	5	10	4.5	4.0	97	7.6	0.9	4.3	-1.9	3.8	4.3	5.5	6.3	7.4	8.0	1	2	4	0	tr/fr	5.2	0	0	0	0	0	0	1020	0.0	0.0	0.4
	7	2	SE	2	5	04	4.0	0.9	80	8.8	-0.3	4.3	-3.0	1.7	2.5	4.6	5.6	7.0	8.0	1	0	5	0	0.0	7.2	0	0	0	0	0	0	1020	0.0	0.5	1.5
	8	6	S	5	6	04	6.4	3.8	84	10.0	3.9	7.0	1.5	3.7	3.8	5.2	5.4	5.6	7.8	1	0	1	0	4.0	7.7	0	0	0	0	0	0	1020	3.8	0.0	1.0
	9	8	SW	5	5	10	7.9	7.0	94	9.2	6.1	7.7	4.9	6.5	6.3	6.1	6.2	6.6	7.6	1	2	3	0	12.5	3.5	0	0	0	0	0	0	1021	9.6	0.0	0.4
	10	7	W	2	5	10	6.3	5.9	97	10.6	6.2	8.4	5.4	7.0	7.3	7.2	7.1	6.9	7.5	2	2	3	0	0.0	5.8	0	0	0	0	0	0	1019	0.0	0.0	0.4
	11	6	00	0	7	10	3.8	2.6	92	10.1	2.6	6.4	-0.5	4.5	5.1	6.2	6.8	7.2	7.8	1	0	1	0	20.3	2.3	0	0	0	0	0	0	1020	10.3	0.0	0.7
	12	6	NW	5	7	01	6.5	5.4	92	9.3	3.8	6.6	3.5	7.5	8.0	8.0	7.5	7.4	7.6	2	2	3	0	3.1	4.9	0	0	0	0	0	0	1003	3.6	0.0	0.8
	13	7	N	7	6	70	2.4	0.8	89	6.5	1.4	4.0	0.2	3.5	4.8	6.1	6.8	7.5	7.8	2	5	9	0	1.1	2.8	s	0	4	0	1	0	1010	0.4	0.0	1.8
	14	7	N	5	7	01	4.8	1.5	79	7.7	2.6	5.2	0.2	3.8	4.2	5.2	5.9	7.0	7.8	1	2	4	0	0.2	4.8	0	0	4	0	0	0	1024	0.3	0.0	2.0
	15	2	NE	3	7	01	3.1	0.2	81	7.7	1.9	4.8	-0.1	2.0	2.9	4.5	5.3	6.8	7.8	1	0	5	0	tr/fr	8.5	0	0	0	0	0	0	1028	0.0	0.0	0.7
	16	5	00	0	7	04	1.2	-3.0	74	6.9	-1.0	3.0	-4.8	1.0	2.1	3.8	4.8	6.3	7.8	3	0	7	0	1.6	5.6	0	0	0	0	0	0	1030	1.8	8.5	0.7
	17	5	NE	1	7	01	6.6	5.2	91	8.8	1.2	5.0	-1.0	5.3	5.3	5.5	5.5	6.2	7.5	1	2	3	0	0.4	7.5	0	0	0	0	0	0	1028	0.0	0.0	0.4
	18	8	SW	2	5	53	6.7	6.5	98	8.4	3.7	6.1	0.1	5.5	5.6	6.0	6.1	6.5	7.4	1	2	3	0	4.1	3.7	0	0	0	0	0	0	1022	4.9	0.0	1.0
	19	6	N	3	6	87	1.8	0.2	89	6.4	1.8	4.1	0.8	3.5	4.3	5.3	6.0	6.6	7.5	5	5	6	0	0.7	8.3	s	0	3	0	0	0	1023	0.2	0.0	2.0
	20	5	NE	5	8	02	1.7	-4.5	63	4.0	0.8	2.4	-0.6	1.4	2.4	4.1	5.2	6.3	7.4	1	0	9	0	0.0	7.9	0	0	0	0	0	0	1023	0.0	0.0	2.5
	21	8	NE	2	8		2.5	-1.1	77	4.4	1.3	2.9	-1.0	2.0	2.7	3.8	4.9	6.1	7.3	1	0	0	0	0.2	6.6	s	0	3	0	0	0	1015	0.0	0.0	1.1
	22	5	NE	5	7	05	2.6	-0.4	81	5.0	1.1	3.1	-1.6	2.5	2.9	3.9	4.6	5.8	7.2	1	0	4	0	1.1	6.4	s	0	3	0	0	0	1021	0.6	0.0	1.4
	23	6	NE	3	7	04	1.7	-0.2	87	4.5	0.3	2.4	-2.2	1.2	2.1	4.5	4.3	5.8	7.0	8	8	9	0	1.2	7.8	s	1	3	0	0	0	1020	1.3	0.0	1.4
	24	8	NE	6	5	71	2.2	-0.9	85	3.6	0.2	1.9	-1.0	2.0	2.5	3.4	4.2	5.3	7.0	1	2	9	0	0.2	2.1	s	0	3	0	0	0	1021	0.0	0.0	1.6
	25	5	NE	3	5	04	2.4	-1.6	75	5.3	1.1	3.2	-1.5	1.5	1.9	3.0	3.9	5.2	6.8	1	0	0	0	0.3	7.6	s	0	4	0	0	0	1023	0.0	0.0	1.6
	26	8	NE	5	7	05	4.2	1.4	82	6.3	2.3	4.3	0.8	3.1	3.5	4.0	4.5	5.4	6.8	1	0	0	0	0.0	5.8	0	0	0	0	0	0	1023	0.0	0.0	1.5
	27	6	NE	4	7	01	4.2	1.1	80	6.9	1.4	4.2	-1.3	3.2	3.5	4.0	4.7	5.5	6.8	1	0	0	0	0.3	10.5	0	0	3	0	0	0	1030	0.3	4.3	1.0
	28	8	W	2	7	02	1.7	-0.2	87	6.0	-0.9	2.6	-5.0	2.2	2.7	3.8	4.4	5.5	6.8	5	5	9	0	6.2	4.1	s	0	3	0	0	0	1026	6.1	3.8	0.5
	N	79	%
	Means---->						4.4	2.3	87	7.5	2.5	5.0	0.6	4.0	4.5	5.4	5.8	6.5	7.5						5.5							1023
	Totals----->																							74.0	153.5	8	1	11	0	1	0		54.3	17.1	28.3
	MEANS AND AVERAGES AT LLANSADWRN, ANGLESEY FOR FEBRUARY 2005
	Differences from 1995-2004 average* as used by the Weather Observers Network & from 1971-2000 average**.
	Air temperature							*	**		Weather (No. days occurrence)						*		Wind direction (days)								Rainfall (mm)						*	**
		Mean maximum					7.5	-1.2	-1.0			Sleet/ snow falling				8	4.7			N			4					Total				74.0	66	99	%
		Mean minimum					2.5	-0.4	0.4			Snow lying (at 09 GMT)				1	0.0			NE			11					Largest fall				20.3
		Mean (max+min)/2					5.0	-0.8	-0.3			Hail <5 mm				11	5.6			E			0
		Highest maximum					10.6	-1.9				Hail >=5 mm				0	{All types}			SE			1				Evaporation (mm)
		Lowest maximum					3.6	-1.0				Thunder heard				0	-0.6			S			1					Lysimeter				PE	14.6
		Highest minimum					7.5	-0.7				Gales				1	n.a.			SW			3					Monthly total				PWB	59.4
		Lowest minimum					-1.0	0.1				Fog (at 09 GMT)				0	n.a.			W			2									PWS	61.9
		No. days <0.0C					3	-0.6			Rainfall (No. days occurrence)									NW			3									PWD	-2.4
	Grass minimum mean						0.6	-0.2				Dry		0.0 mm		4	-1.9			Calm			3
	Lowest minimum						-5.0	0.5				Rain		>= 0.2 mm		22	3.2											Piche (ml)				28.3
		No. days <0.0C						14	1.0				Wet		>= 1.0 mm		11	-3.8			Check days			28
	Earth temperature 30cm						5.7	0.0						>= 5.0 mm		4	-3.7			This month			28
*

KEY: OBSERVATIONS AT 09 GMT DD date; N cloud (oktas, 9=obscured); DD wind direction (8 sectors, 00=calm); ff wind speed (Beaufort scale); V visibility (0 dense fog, 1 thick fog, 2 fog, 3 moderate fog, 4 very poor, 5 poor, 6 moderate, 7 good, 8 very good); WW present weather SYNOP code (eg. 01 cloud decreasing, 02 sky not changing, 03 cloud increasing, 04 smoke haze, 05 haze) Temperatures (degC); Temp dry bulb temperature; Dpt dewpoint; RH relative humidity (%); soil temperatures are under bare soil and earth under grass; SS snow depth (cm); Press air pressure, aneroid (mb). For state of the ground E, concrete C, and grass Gr codes consult the page on 'Recording Atmospheric Depositions on Grass'. 24 hour observations... Max maximum temperature (degC) beginning 09GMT; Min minimum temperature ending 09GMT; Gmin grass minimum temperature (degC) ending 09GMT; Pch Evap Piche evaporation (ml) beginning 09GMT; Rain rainfall beginning 09GMT (mm); Rain hrs hours of rainfall (>0.1mm/hr) 09-09GMT; Fr. hrs hours of frost (00-24GMT). Sol mv h Solar radiation (MV h) dawn to dusk. Monthly observations... PE Potential evapotranspiration, PWB Potential water balance, PWS Potential water surplus, PWD Potential water deficit. Weather: days with... s slight or S heavy snow/sleet falling; L >=50% snow cover at 09GMT; H categories of hail: 1 ice crystals, 2 snow grains, 3 snow pellets, 4 ice pellets, 5 hail 5-9 mm, 6 hail 10-19 mm; t slight or T heavy thunder heard; G gale; Fog any hour 1, 09 GMT 9.

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