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Carrollton 14 Day Long Range Forecast

14 Day weather providing an extended long range forecast outlook for Carrollton

Missouri, United States Of America

Long range weather outlook for Carrollton includes 14 day forecast summary:

Over the next 14 days the Carrollton forecast suggests the average daytime maximum temperature will be around 25°C, with a high for the two weeks of 29°C expected on the afternoon of Sunday 19th. The mean minimum temperature will be 16°C, dipping to its lowest on the morning of Thursday 23rd at 8°C. Expect the following 14 days ahead to have some days seeing a little precipitation and some days with rain. The current forecast indicates Sunday 26th will have the most precipitation with an accumulation of around 27.0mm. On the whole winds are likely to be moderate.

DayLocal TimeDirSpeed/
Gust
Temp/
Feels Like
HumidityPressureCloud AmountPrecip AmountWeather
Fri 17
May
15:00

SSE
SSE

6 / 7 mph 81 / 80°F 58% 1006 mb
Low level cloud: 0%
Mid level cloud: 40%
High level cloud: 0%
Most Significant Cloud Type: medium
41%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
18:00

SSE
SSE

3 / 6 mph 78 / 78°F 69% 1006 mb
Low level cloud: 0%
Mid level cloud: 22%
High level cloud: 0%
Most Significant Cloud Type: medium
21%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
21:00

SSE
SSE

6 / 12 mph 66 / 66°F 86% 1007 mb
Low level cloud: 0%
Mid level cloud: 5%
High level cloud: 0%
Most Significant Cloud Type: medium
4%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
Sat 18
May
00:00

S
S

7 / 14 mph 63 / 63°F 92% 1007 mb
Low level cloud: 0%
Mid level cloud: 4%
High level cloud: 0%
Most Significant Cloud Type: medium
4%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
03:00

SSW
SSW

6 / 13 mph 61 / 61°F 94% 1008 mb
Low level cloud: 3%
Mid level cloud: 4%
High level cloud: 0%
Most Significant Cloud Type: low
4%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
06:00

SSW
SSW

6 / 11 mph 64 / 62°F 93% 1010 mb
Low level cloud: 4%
Mid level cloud: 1%
High level cloud: 0%
Most Significant Cloud Type: low
4%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
09:00

SSW
SSW

9 / 10 mph 75 / 77°F 74% 1010 mb
Low level cloud: 4%
Mid level cloud: 3%
High level cloud: 0%
Most Significant Cloud Type: low
4%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
12:00

SW
SW

10 / 11 mph 81 / 82°F 60% 1010 mb
Low level cloud: 0%
Mid level cloud: 5%
High level cloud: 0%
Most Significant Cloud Type: medium
5%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
15:00

SW
SW

8 / 10 mph 84 / 84°F 55% 1010 mb
Low level cloud: 0%
Mid level cloud: 11%
High level cloud: 0%
Most Significant Cloud Type: medium
11%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
18:00

SSW
SSW

5 / 7 mph 83 / 84°F 71% 1010 mb
Low level cloud: 15%
Mid level cloud: 3%
High level cloud: 0%
Most Significant Cloud Type: low
15%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
21:00

SSW
SSW

6 / 13 mph 71 / 71°F 84% 1012 mb
Low level cloud: 1%
Mid level cloud: 5%
High level cloud: 0%
Most Significant Cloud Type: medium
7%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
Sun 19
May
00:00

WSW
WSW

4 / 9 mph 68 / 68°F 90% 1013 mb
Low level cloud: 8%
Mid level cloud: 4%
High level cloud: 6%
Most Significant Cloud Type: low
9%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
03:00

S
S

4 / 9 mph 66 / 66°F 93% 1013 mb
Low level cloud: 4%
Mid level cloud: 4%
High level cloud: 17%
Most Significant Cloud Type: low
7%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
06:00

S
S

5 / 9 mph 69 / 66°F 92% 1014 mb
Low level cloud: 4%
Mid level cloud: 5%
High level cloud: 32%
Most Significant Cloud Type: medium
17%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
09:00

SSE
SSE

7 / 9 mph 77 / 78°F 76% 1014 mb
Low level cloud: 2%
Mid level cloud: 2%
High level cloud: 11%
Most Significant Cloud Type: low
4%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
12:00

S
S

10 / 12 mph 84 / 85°F 61% 1013 mb
Low level cloud: 5%
Mid level cloud: 14%
High level cloud: 9%
Most Significant Cloud Type: medium
27%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
15:00

S
S

12 / 15 mph 85 / 86°F 55% 1010 mb
Low level cloud: 4%
Mid level cloud: 12%
High level cloud: 14%
Most Significant Cloud Type: low
10%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
18:00

S
S

6 / 9 mph 83 / 84°F 72% 1008 mb
Low level cloud: 0%
Mid level cloud: 7%
High level cloud: 0%
Most Significant Cloud Type: medium
6%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
21:00

SSE
SSE

8 / 17 mph 72 / 76°F 83% 1010 mb
Low level cloud: 0%
Mid level cloud: 46%
High level cloud: 98%
Most Significant Cloud Type: medium
50%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
Mon 20
May
00:00

S
S

19 / 30 mph 69 / 69°F 91% 1007 mb
Low level cloud: 17%
Mid level cloud: 45%
High level cloud: 100%
Most Significant Cloud Type: low
45%
Expect 0.1 In of precipitation over the past 3 hours.
0.1 In
03:00

S
S

8 / 17 mph 65 / 65°F 90% 1007 mb
Low level cloud: 0%
Mid level cloud: 11%
High level cloud: 34%
Most Significant Cloud Type: medium
13%
Expect 0.1 In of precipitation over the past 3 hours.
0.1 In
06:00

SSW
SSW

11 / 18 mph 69 / 67°F 92% 1009 mb
Low level cloud: 52%
Mid level cloud: 9%
High level cloud: 33%
Most Significant Cloud Type: low
58%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
09:00

SSW
SSW

6 / 8 mph 73 / 69°F 85% 1010 mb
Low level cloud: 31%
Mid level cloud: 32%
High level cloud: 100%
Most Significant Cloud Type: low
54%
Expect 0.1 In of precipitation over the past 3 hours.
0.1 In
12:00

SSE
SSE

7 / 9 mph 79 / 79°F 69% 1009 mb
Low level cloud: 28%
Mid level cloud: 16%
High level cloud: 22%
Most Significant Cloud Type: low
36%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
15:00

SSE
SSE

8 / 12 mph 80 / 81°F 72% 1007 mb
Low level cloud: 61%
Mid level cloud: 69%
High level cloud: 0%
Most Significant Cloud Type: low
85%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
18:00

S
S

9 / 15 mph 81 / 83°F 76% 1006 mb
Low level cloud: 11%
Mid level cloud: 46%
High level cloud: 0%
Most Significant Cloud Type: medium
75%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
21:00

SSE
SSE

8 / 17 mph 73 / 77°F 89% 1006 mb
Low level cloud: 0%
Mid level cloud: 17%
High level cloud: 0%
Most Significant Cloud Type: medium
17%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
Tue 21
May
00:00

SSE
SSE

11 / 23 mph 70 / 70°F 93% 1005 mb
Low level cloud: 0%
Mid level cloud: 7%
High level cloud: 0%
Most Significant Cloud Type: medium
8%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
03:00

SSE
SSE

12 / 22 mph 69 / 69°F 92% 1004 mb
Low level cloud: 7%
Mid level cloud: 4%
High level cloud: 0%
Most Significant Cloud Type: low
8%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
06:00

S
S

15 / 26 mph 71 / 69°F 89% 1003 mb
Low level cloud: 4%
Mid level cloud: 5%
High level cloud: 2%
Most Significant Cloud Type: low
5%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
09:00

S
S

23 / 28 mph 79 / 81°F 75% 1001 mb
Low level cloud: 7%
Mid level cloud: 4%
High level cloud: 5%
Most Significant Cloud Type: low
8%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
12:00

SSW
SSW

23 / 26 mph 83 / 87°F 73% 1001 mb
Low level cloud: 27%
Mid level cloud: 11%
High level cloud: 100%
Most Significant Cloud Type: low
42%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
15:00

SSW
SSW

21 / 26 mph 85 / 90°F 74% 1000 mb
Low level cloud: 21%
Mid level cloud: 23%
High level cloud: 0%
Most Significant Cloud Type: low
29%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
18:00

SW
SW

15 / 23 mph 81 / 84°F 81% 999 mb
Low level cloud: 2%
Mid level cloud: 3%
High level cloud: 0%
Most Significant Cloud Type: low
2%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
21:00

NNW
NNW

14 / 22 mph 68 / 68°F 89% 1003 mb
Low level cloud: 32%
Mid level cloud: 19%
High level cloud: 0%
Most Significant Cloud Type: low
38%
Expect 0.1 In of precipitation over the past 3 hours.
0.1 In
Wed 22
May
00:00

N
N

6 / 11 mph 59 / 58°F 90% 1005 mb
Low level cloud: 10%
Mid level cloud: 7%
High level cloud: 0%
Most Significant Cloud Type: low
12%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
03:00

NE
NE

7 / 14 mph 56 / 55°F 92% 1004 mb
Low level cloud: 5%
Mid level cloud: 4%
High level cloud: 0%
Most Significant Cloud Type: low
6%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
06:00

N
N

6 / 10 mph 59 / 56°F 92% 1005 mb
Low level cloud: 65%
Mid level cloud: 2%
High level cloud: 0%
Most Significant Cloud Type: low
65%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
09:00

NNE
NNE

9 / 12 mph 60 / 60°F 88% 1004 mb
Low level cloud: 97%
Mid level cloud: 84%
High level cloud: 0%
Most Significant Cloud Type: low
100%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
12:00

NNW
NNW

13 / 17 mph 59 / 56°F 93% 1007 mb
Low level cloud: 95%
Mid level cloud: 84%
High level cloud: 0%
Most Significant Cloud Type: low
100%
Expect 0.1 In of precipitation over the past 3 hours.
0.1 In
15:00

NW
NW

14 / 16 mph 67 / 66°F 72% 1008 mb
Low level cloud: 80%
Mid level cloud: 8%
High level cloud: 0%
Most Significant Cloud Type: low
82%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
18:00

NW
NW

12 / 17 mph 65 / 64°F 77% 1010 mb
Low level cloud: 15%
Mid level cloud: 11%
High level cloud: 0%
Most Significant Cloud Type: low
18%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
21:00

NW
NW

13 / 21 mph 56 / 53°F 88% 1013 mb
Low level cloud: 34%
Mid level cloud: 12%
High level cloud: 0%
Most Significant Cloud Type: low
38%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
Thu 23
May
00:00

WNW
WNW

8 / 13 mph 51 / 47°F 96% 1016 mb
Low level cloud: 46%
Mid level cloud: 10%
High level cloud: 0%
Most Significant Cloud Type: low
49%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
03:00

NW
NW

6 / 12 mph 48 / 46°F 96% 1016 mb
Low level cloud: 22%
Mid level cloud: 3%
High level cloud: 0%
Most Significant Cloud Type: low
22%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
06:00

NW
NW

6 / 10 mph 50 / 47°F 92% 1018 mb
Low level cloud: 14%
Mid level cloud: 0%
High level cloud: 0%
Most Significant Cloud Type: low
13%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
09:00

NNW
NNW

7 / 9 mph 62 / 60°F 71% 1019 mb
Low level cloud: 17%
Mid level cloud: 1%
High level cloud: 10%
Most Significant Cloud Type: low
18%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
12:00

NNW
NNW

6 / 7 mph 66 / 64°F 62% 1019 mb
Low level cloud: 7%
Mid level cloud: 52%
High level cloud: 100%
Most Significant Cloud Type: medium
76%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
15:00

N
N

4 / 5 mph 69 / 67°F 58% 1018 mb
Low level cloud: 0%
Mid level cloud: 3%
High level cloud: 0%
Most Significant Cloud Type: medium
3%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
18:00

ENE
ENE

3 / 4 mph 69 / 67°F 65% 1017 mb
Low level cloud: 0%
Mid level cloud: 2%
High level cloud: 0%
Most Significant Cloud Type: medium
2%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
21:00

S
S

3 / 6 mph 58 / 58°F 78% 1019 mb
Low level cloud: 0%
Mid level cloud: 3%
High level cloud: 0%
Most Significant Cloud Type: medium
2%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
DayLocal TimeDirSpeed/
Gust
Temp/
Feels Like
HumidityPressureCloud AmountPrecip AmountWeather
Fri 24
May
00:00

SSE
SSE

11 / 24 mph 66 / 66°F 96% 1014 mb
Low level cloud: 46%
Mid level cloud: 9%
High level cloud: 56%
Most Significant Cloud Type: low
55%
0.0 In
06:00

ESE
ESE

7 / 16 mph 67 / 67°F 98% 1006 mb
Low level cloud: 89%
Mid level cloud: 23%
High level cloud: 54%
Most Significant Cloud Type: low
100%
0.0 In
12:00

SSW
SSW

16 / 34 mph 81 / 86°F 72% 1001 mb
Low level cloud: 77%
Mid level cloud: 2%
High level cloud: 0%
Most Significant Cloud Type: low
78%
0.0 In
18:00

NW
NW

9 / 18 mph 67 / 67°F 90% 1007 mb
Low level cloud: 30%
Mid level cloud: 33%
High level cloud: 0%
Most Significant Cloud Type: low
41%
0.0 In
Sat 25
May
00:00

S
S

20 / 42 mph 76 / 79°F 77% 1002 mb
Low level cloud: 19%
Mid level cloud: 1%
High level cloud: 0%
Most Significant Cloud Type: low
19%
0.0 In
06:00

SSW
SSW

13 / 26 mph 66 / 66°F 92% 1005 mb
Low level cloud: 93%
Mid level cloud: 9%
High level cloud: 0%
Most Significant Cloud Type: low
96%
0.0 In
12:00

SSW
SSW

21 / 44 mph 83 / 88°F 72% 1005 mb
Low level cloud: 92%
Mid level cloud: 8%
High level cloud: 9%
Most Significant Cloud Type: low
95%
0.0 In
18:00

SSW
SSW

18 / 37 mph 78 / 82°F 81% 1005 mb
Low level cloud: 21%
Mid level cloud: 46%
High level cloud: 100%
Most Significant Cloud Type: low
48%
0.0 In
Sun 26
May
00:00

SSE
SSE

13 / 28 mph 68 / 68°F 92% 1006 mb
Low level cloud: 0%
Mid level cloud: 7%
High level cloud: 6%
Most Significant Cloud Type: medium
7%
0.6 In
06:00

SSW
SSW

12 / 24 mph 70 / 70°F 94% 1007 mb
Low level cloud: 76%
Mid level cloud: 88%
High level cloud: 4%
Most Significant Cloud Type: low
100%
1.2 In
12:00

SW
SW

10 / 21 mph 76 / 81°F 88% 1007 mb
Low level cloud: 88%
Mid level cloud: 75%
High level cloud: 26%
Most Significant Cloud Type: low
100%
0.4 In
18:00

NNW
NNW

7 / 14 mph 74 / 78°F 87% 1009 mb
Low level cloud: 26%
Mid level cloud: 18%
High level cloud: 0%
Most Significant Cloud Type: low
32%
0.2 In
Mon 27
May
00:00

NE
NE

4 / 7 mph 63 / 64°F 98% 1011 mb
Low level cloud: 68%
Mid level cloud: 9%
High level cloud: 0%
Most Significant Cloud Type: low
71%
0.5 In
06:00

NE
NE

9 / 19 mph 60 / 60°F 86% 1014 mb
Low level cloud: 0%
Mid level cloud: 3%
High level cloud: 0%
Most Significant Cloud Type: medium
3%
0.0 In
12:00

NNE
NNE

13 / 27 mph 57 / 54°F 95% 1015 mb
Low level cloud: 99%
Mid level cloud: 63%
High level cloud: 0%
Most Significant Cloud Type: low
100%
0.3 In
18:00

E
E

7 / 15 mph 71 / 71°F 74% 1014 mb
Low level cloud: 0%
Mid level cloud: 5%
High level cloud: 0%
Most Significant Cloud Type: medium
4%
0.0 In
Tue 28
May
00:00

NNE
NNE

8 / 17 mph 60 / 60°F 92% 1017 mb
Low level cloud: 77%
Mid level cloud: 23%
High level cloud: 0%
Most Significant Cloud Type: low
84%
0.1 In
06:00

ENE
ENE

6 / 14 mph 60 / 60°F 88% 1016 mb
Low level cloud: 0%
Mid level cloud: 5%
High level cloud: 53%
Most Significant Cloud Type: medium
6%
0.0 In
12:00

NE
NE

11 / 23 mph 65 / 65°F 72% 1020 mb
Low level cloud: 53%
Mid level cloud: 31%
High level cloud: 0%
Most Significant Cloud Type: low
64%
0.0 In
18:00

E
E

10 / 20 mph 71 / 71°F 77% 1014 mb
Low level cloud: 15%
Mid level cloud: 26%
High level cloud: 6%
Most Significant Cloud Type: low
25%
0.0 In
Wed 29
May
00:00

N
N

9 / 18 mph 56 / 54°F 96% 1022 mb
Low level cloud: 59%
Mid level cloud: 26%
High level cloud: 0%
Most Significant Cloud Type: low
68%
0.2 In
06:00

NNE
NNE

8 / 16 mph 58 / 56°F 94% 1017 mb
Low level cloud: 79%
Mid level cloud: 74%
High level cloud: 0%
Most Significant Cloud Type: low
100%
0.2 In
12:00

NE
NE

8 / 17 mph 69 / 69°F 59% 1023 mb
Low level cloud: 59%
Mid level cloud: 1%
High level cloud: 0%
Most Significant Cloud Type: low
59%
0.0 In
18:00

NNW
NNW

7 / 14 mph 63 / 63°F 80% 1017 mb
Low level cloud: 83%
Mid level cloud: 17%
High level cloud: 0%
Most Significant Cloud Type: low
89%
0.6 In
Thu 30
May
00:00

SE
SE

6 / 13 mph 56 / 54°F 83% 1022 mb
Low level cloud: 0%
Mid level cloud: 0%
High level cloud: 0%
Most Significant Cloud Type: high
0%
0.0 In
06:00

WNW
WNW

7 / 15 mph 55 / 53°F 93% 1018 mb
Low level cloud: 8%
Mid level cloud: 13%
High level cloud: 0%
Most Significant Cloud Type: low
12%
0.0 In
12:00

SE
SE

14 / 29 mph 71 / 71°F 58% 1022 mb
Low level cloud: 0%
Mid level cloud: 4%
High level cloud: 0%
Most Significant Cloud Type: medium
4%
0.0 In
18:00

WNW
WNW

8 / 17 mph 69 / 69°F 75% 1015 mb
Low level cloud: 0%
Mid level cloud: 17%
High level cloud: 0%
Most Significant Cloud Type: medium
17%
0.0 In
Fri 31
May
00:00

SE
SE

9 / 18 mph 59 / 57°F 86% 1020 mb
Low level cloud: 0%
Mid level cloud: 3%
High level cloud: 0%
Most Significant Cloud Type: medium
2%
0.0 In
06:00

NW
NW

9 / 20 mph 55 / 53°F 93% 1018 mb
Low level cloud: 14%
Mid level cloud: 43%
High level cloud: 0%
Most Significant Cloud Type: medium
83%
0.0 In
12:00

SSE
SSE

14 / 30 mph 64 / 64°F 85% 1020 mb
Low level cloud: 0%
Mid level cloud: 36%
High level cloud: 100%
Most Significant Cloud Type: medium
40%
0.1 In
18:00

N
N

11 / 22 mph 64 / 64°F 68% 1020 mb
Low level cloud: 0%
Mid level cloud: 20%
High level cloud: 0%
Most Significant Cloud Type: medium
19%
0.0 In
Sat 01
Jun
00:00

SSE
SSE

13 / 28 mph 62 / 62°F 91% 1017 mb
Low level cloud: 0%
Mid level cloud: 30%
High level cloud: 100%
Most Significant Cloud Type: medium
34%
0.1 In
06:00

N
N

6 / 13 mph 51 / 49°F 90% 1025 mb
Low level cloud: 0%
Mid level cloud: 0%
High level cloud: 0%
Most Significant Cloud Type: high
0%
0.0 In
12:00

SSE
SSE

20 / 41 mph 74 / 78°F 70% 1015 mb
Low level cloud: 1%
Mid level cloud: 30%
High level cloud: 0%
Most Significant Cloud Type: medium
31%
0.2 In
18:00

NNE
NNE

4 / 9 mph 67 / 67°F 66% 1024 mb
Low level cloud: 20%
Mid level cloud: 2%
High level cloud: 0%
Most Significant Cloud Type: low
20%
0.0 In

The day label given represents the local day relative to the local time for the location you are looking at.
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Day

This time is corrected for local time zones and where possible for daylight saving times.
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Local Time

The wind direction we use on this page is the direction the wind is coming from, given in a 16 point compass format.
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Dir

This refers to the sustained average wind speed, normally averaged over a period of 10 minutes for up to 3 hrs.
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Speed/
Gust

Temperature from our forecast perspective are fairly well defined, they are what we would expect to measure in a standard meteorological screen (in other words, shaded and well ventilated) at 2 metres above ground level.
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Temp/
Feels Like

The relative humidity is the percent of saturation humidity, generally calculated in relation to saturated vapour density.
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Humidity

The value given is a total predicted for the previous 3 hrs and includes the time of the forecast being looked at.
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Precip Amount

The total amount of cloud as a percentage is derived from looking at cloud cover throughout the atmosphere and estimating how these combine when looked at from the ground.
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Cloud Amount

Here we try to capture the feel of the weather as an image – it will never be perfect but is useful for a quick overview.
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Weather

When we measure for forecast air pressure we are normally doing this relative to a certain height and most commonly relative to Mean Sea Level.
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Pressure