Isdalstø, Norway

1. Thu6 PM56°4 mph
2. 7 PM54°3 mph
3. 8 PM51°1 mph
4. 9 PM50°2 mph
5. 10 PM49°3 mph
6. 11 PM49°5 mph
7. Fri12 AM49°4 mph
8. 1 AM49°5 mph
9. 2 AM49°6 mph
10. 3 AM50°7 mph
11. 4 AM51°8 mph
12. 5 AM51°9 mph
13. 6 AM52°3%11 mph
14. 7 AM53°15%11 mph
15. 8 AM53°19%12 mph
16. 9 AM54°24%13 mph
17. 10 AM54°37%12 mph
18. 11 AM55°62%13 mph
19. 12 PM55°87%13 mph
20. 1 PM54°91%11 mph
21. 2 PM54°85%8 mph
22. 3 PM54°89%4 mph
23. 4 PM54°67%2 mph
24. 5 PM54°47%4 mph
25. 6 PM54°30%4 mph
26. 7 PM54°10%3 mph
27. 8 PM53°6%3 mph
28. 9 PM53°3%2 mph
29. 10 PM53°1%3 mph
30. 11 PM52°1%4 mph
31. Sat12 AM51°3%3 mph
32. 1 AM51°2%2 mph
33. 2 AM50°1%3 mph
34. 3 AM49°0%3 mph
35. 4 AM48°2%3 mph
36. 5 AM48°1%4 mph
37. 6 AM47°4 mph
38. 7 AM47°5 mph
39. 8 AM47°6 mph
40. 9 AM49°6 mph
41. 10 AM52°6%8 mph
42. 11 AM54°24%12 mph
43. 12 PM55°31%13 mph
44. 1 PM55°19%10 mph
45. 2 PM56°16%10 mph
46. 3 PM56°16%11 mph
47. 4 PM56°12%10 mph
48. 5 PM56°6%9 mph

Scroll sideways for more hours. Pick an hour for every number.

1. TodaySep 2456°49°Partly cloudy0%wind 5 mph · gusts 11 mph
2. FriSep 2555°48°Heavy rain91%0.27 inwind 13 mph · gusts 27 mph
3. SatSep 2656°54°Partly cloudy31%wind 13 mph · gusts 27 mph
4. SunSep 2761°57°Cloudy30%0.04 inwind 15 mph · gusts 25 mph
5. MonSep 2858°50°Heavy rain80%0.44 inwind 11 mph
6. TueSep 2960°54°Cloudy34%wind 5 mph
7. WedSep 3069°59°Cloudy32%wind 11 mph
8. ThuOct 168°55°Partly cloudy40%wind 9 mph
9. FriOct 261°56°Rain showers36%0.17 inwind 8 mph
10. SatOct 360°55°Rain44%0.23 inwind 7 mph
11. SunOct 458°53°Cloudy44%0.04 inwind 7 mph
12. MonOct 5~55°46°Model mean
13. TueOct 6~57°47°Model mean
14. WedOct 7~56°48°Model mean
15. ThuOct 8~56°51°Model mean0.20 in
16. FriOct 9~59°55°Model mean

• Feels like56°
• WindW 4 mphgusts 11 mph
• Humidity73%
• Dew point47°
• Pressure30.07 inHg
• UV index0 · Lowclear-sky peak 2 Friday
• Sunrise and sunsetSunrise · Sunset
• Moonrise7:00 PMMoonset 4:06 AM
• Moon phaseWaxing gibbous95% lit

Each line is one model’s own forecast at its own grid cell: three kilometers for HRRR, a quarter of a degree for the global models, which can sit a few hundred meters above or below the town. Where they agree the forecast is settled; where they part is where it is not.

NWS gridGFSGEFS ± spreadECMWFECMWF AI

A ~ marks a high or low read from six-hourly steps, which miss the true extreme by a degree or two.

ECMWF ensemble meteogram

10 daysTemperature plume

None of these is a measurement. Each is a rating of the forecast ahead, and of what is happening at the point right now, against what the activity or the ailment is known to mind, and each names the figure that decided it. An ailment or a pest is rated as a risk, low to extreme; an activity, a chore or a journey as a condition, poor to ideal.

Each rating says which span it is for: the rest of today’s daylight, tonight, or the next 24 hours.

Tonight has no dark, clear hour without a bright moon in this forecast. Rated poor.

Dark is the sun 18 degrees below the horizon; where it never gets that low, 12 degrees, marked nautical. Clear is sky cover of 20% or less. A bright moon is one above the horizon with a quarter or more of its disc lit. Transparency is estimated from surface humidity (70% and 85% mark fair and poor) and visibility, since the forecast carries no haze or high cloud moisture; seeing is not rated. Dew is the air within 2 °C of its dew point. Excellent is four or more clear moonless hours with good transparency; good is three; fair is one, or two clear hours.

Hours fit for spraying, and the days dry enough for fieldwork and hay, read from this forecast’s wind, gusts, humidity, temperature and rain.

Spraying windows

• Tue 2 PM to 8 PM 6 hours, every hour within the rules
• Wed 2 AM to 8 AM 6 hours, every hour within the rules
• Thu 2 AM to 4 AM 2 hours, every hour within the rules
• Sun 2 PM to 4 PM 2 hours, every hour within the rules

Good Marginal No

Field days

Spraying: sustained wind 3 to 10 mph, the range US extension services and most labels give; gusts no more than 15 mph (this page’s limit); delta T (air minus wet-bulb temperature) 2 to 8 °C preferred and 8 to 10 °C marginal, from GRDC guidance, with the wet bulb by Stull’s formula; no hour at a 30% chance of rain or 0.25 mm forecast during the rain-free time. Follow the product label, which overrides all of this. Field days: dry is no daytime hour at a 30% chance and under 1 mm all day, wet is 6 mm (0.25 in) or more; soil moisture is not in the forecast, so ground still wet from earlier rain is not accounted for. Hay drying marks a dry day with humidity down to 50% and a breeze of 5 mph or more.

1. Tonight49° · SE 1–9 mph

   Partly cloudy. Low near 10°C. Southeast wind 2 to 15 km/h. Chance of precipitation is 0%.

2. Friday55° · 91% · SSE 2–13 mph

   Heavy rain. High near 13°C. Southsoutheast wind 3 to 21 km/h. Chance of precipitation is 91%. Precipitation around 7 mm.

3. Friday Night48° · 30% · SE 2–4 mph

   Cloudy. Low near 9°C. Southeast wind 4 to 7 km/h. Chance of precipitation is 30%.

4. Saturday56° · 31% · SSE 4–12 mph

   Partly cloudy. High near 13°C. Southsoutheast wind 7 to 20 km/h. Chance of precipitation is 31%.

5. Saturday Night54° · 12% · S 6–11 mph

   Cloudy. Low near 12°C. South wind 10 to 18 km/h. Chance of precipitation is 12%.

6. Sunday61° · 14% · SSE 11–15 mph

   Cloudy. High near 16°C. Southsoutheast wind 18 to 24 km/h. Chance of precipitation is 14%.

7. Sunday Night57° · 72% · SSE 11–11 mph

   Rain. Low near 14°C. Southsoutheast wind 17 to 18 km/h. Chance of precipitation is 72%. Precipitation around 6 mm.

8. Monday58° · 80% · SSE 6–9 mph

   Heavy rain. High near 14°C. Southsoutheast wind 10 to 15 km/h. Chance of precipitation is 80%. Precipitation around 6 mm.

9. Monday Night50° · 34% · SE 4 mph

   Cloudy. Low near 10°C. Southeast wind around 7 km/h. Chance of precipitation is 34%.

10. Tuesday60° · 6% · ESE 3–5 mph

    Cloudy. High near 16°C. Eastsoutheast wind 5 to 8 km/h. Chance of precipitation is 6%.

11. Tuesday Night54° · 26% · E 3–9 mph

    Cloudy. Low near 12°C. East wind 5 to 15 km/h. Chance of precipitation is 26%.

12. Wednesday69° · 26% · E 11–11 mph

    Cloudy. High near 20°C. East wind 17 to 18 km/h. Chance of precipitation is 26%.

13. Wednesday Night59° · 32% · E 9 mph

    Cloudy. Low near 15°C. East wind around 14 km/h. Chance of precipitation is 32%.

14. Thursday68° · 40% · ESE 9–9 mph

    Partly cloudy. High near 20°C. Eastsoutheast wind 14 to 15 km/h. Chance of precipitation is 40%.

15. Thursday Night55° · 36% · ESE 7–7 mph

    Partly cloudy. Low near 13°C. Eastsoutheast wind 11 to 12 km/h. Chance of precipitation is 36%.

16. Friday61° · 30% · SE 7–8 mph

    Rain showers. High near 16°C. Southeast wind 12 to 13 km/h. Chance of precipitation is 30%. Precipitation around 3 mm.

17. Friday Night56° · 36% · ESE 6 mph

    Rain. Low near 14°C. Eastsoutheast wind around 10 km/h. Chance of precipitation is 36%. Precipitation around 3 mm.

18. Saturday60° · 30% · SE 6–7 mph

    Rain. High near 15°C. Southeast wind 10 to 11 km/h. Chance of precipitation is 30%. Precipitation around 3 mm.

19. Saturday Night55° · 44% · SSE 6–7 mph

    Rain. Low near 13°C. Southsoutheast wind 9 to 11 km/h. Chance of precipitation is 44%. Precipitation around 3 mm.

20. Sunday58° · 28% · SSE 7–7 mph

    Cloudy. High near 15°C. Southsoutheast wind 11 to 12 km/h. Chance of precipitation is 28%.

Climate of Isdalstø: normals, records and every month

The forecast office edits about sixty fields for every cell of its grid. The common ones are above; these are the rest, as the daily extreme, for anyone who needs the mixing height, the fire danger or the swell.