Weather Information Links

Clacton on Sea

EASTERN REGION

22 June 2008

Weather Information & Links

Weather Links

Latest Rain Radar Information
Shipping Forecast for the UK
Inshore Forecast
Gale Warning
Click here for Forecast Maps: National Data Buoy Center UK

Pleasure craft info pack from MCGA


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Weather and Temperature Information

Conversion Table

Knots to Miles per Hour

Knots

MPH

Knots

MPH

Knots

MPH

Knots

MPH

5

5.76

10

11.52

15

17.28

20

23.04

25

28.8

30

34.56

35

40.32

40

46.08

45

51.84

50

57.6

55

63.36

60

69.12

65

74.88

70

80.64

75

86.4

80

92.16

85

97.92

90

103.68

95

109.44

100

115.2

Formula to convert: knots * 1.152 = MPH

Beaufort Wind Scale

The Beaufort Wind scale will be helpful in estimating the wind speed by observing conditions around you. This scale is beneficial for severe weather spotters that don't have the equipment available to determine wind speed.

Windspeed in MPH	Description	Visible Condition
0	Calm	Smoke rises vertically
1 - 3	Light Air	Direction of wind shown by smoke but not by wind vanes
4 - 7	Light Breeze	Wind felt on face; leaves rustle; ordinary wind vane moved by wind
8 - 12	Gentle Breeze	Leaves and small twigs in constant motion; wind extends light flag
13 - 18	Moderate Breeze	Raises dust and loose paper; small branches are moved
19 - 24	Fresh Breeze	Small trees in leaf begin to sway; crested wavelets form on inland water
25 - 31	Strong Breeze	Large branches in motion; telephone wires whistle; umbrellas used with difficulty
32 - 38	Moderate Gale	Whole trees in motion; inconvenience in walking against wind
39 - 46	Fresh Gale	Breaks twigs off trees; generally impedes progress
47 - 54	Strong Gale	Slight structural damage occurs; chimney pots and slates removed
55 - 63	Whole Gale	Trees uprooted; considerable structural damage occurs
64 - 72	Storm	Very rarely experienced; accompanied by widespread damage
73+	Hurricane	Devastation occurs

Wind Speed-mph
Calm	5	10	15	20	25	30	35
Temperature (Degrees F)	Wind Chill Chart
45	43	34	29	26	23	21	20
40	37	28	23	19	16	13	12
35	32	22	16	12	8	6	4
30	27	16	9	4	1	-2	-4
25	22	10	2	-3	-7	-10	-12
20	16	3	-5	-10	-15	-18	-20
15	11	-3	-11	-17	-22	-25	-27
10	6	-9	-18	-24	-29	-33	-35
5	0	-15	-25	-31	-36	-41	-43
0	-5	-22	-31	-39	-44	-49	-52
-5	-10	-27	-38	-46	-51	-59	-64
-10	-15	-34	-45	-51	-59	-64	-67
-15	-21	-40	-51	-60	-66	-71	-74
-20	-26	-46	-58	-67	-74	-79	-82
-25	-31	-52	-65	-74	-81	-86	-89

Legend of Wind Chill Factor Dangers:

	43 to -20 degrees - Little Danger
	-21 to -74 degrees - Increasing Danger
	-75 degrees or lower - Great Danger

	70	75	80	85	90	95	100	105	110	115	120
	Air Temperature (Degrees F)
Relative Humidity	Heat Index Chart
0%	64	69	73	78	83	87	91	95	99	103	107
10%	65	70	75	80	85	90	95	100	105	111	116
20%	66	72	77	82	87	93	99	105	112	120	130
30%	67	73	78	84	90	96	104	113	123	135	148
40%	68	74	79	86	93	101	110	123	137	151
50%	69	75	81	88	96	107	120	135	150
60%	70	76	82	90	100	114	132	149
70%	70	77	85	93	106	124	144
80%	71	78	86	97	113	136	157
90%	71	79	88	102	122	150	170
100%	72	80	91	108	133	166

Legend of Heat Index Dangers:

Below 80 degrees - Generally not a health threat

80-89 degrees - Fatigue is possible with prolonged exposure and/or physical activity.
90-104 degrees - Sunstroke, heat cramps and heat exhaustion are possible with prolonged exposure and/or physical activity.
105-129 degrees - Sunstroke, heat cramps and heat exhaustion are likely. Heat stroke is possible with prolonged exposure and/or physical activity.

130+ degrees - Heatstroke/sunstroke is highly likely with continued exposure.

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