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Nerd mode: every forecast, readouts, filters and range & bearing for weather enthusiasts

This week’s weatherBeijing, China

Rain is possible in Beijing on Tuesday

5 in 10 of NOAA’s 31 GEFS forecasts bring measurable rain to Beijing Tue 8 p.m.–2 a.m. GMT+8.

NOAA GEFS, 31 forecasts · Mon 28 Sep 18Z run · updated Tues., Sept. 29, 7:03 a.m. GMT+8 · times are Beijing’s (GMT+8)

See it on the globe For warnings, follow your national weather service.

Quick answers

Will it rain in Beijing this week?
The best chances of measurable rain: Tuesday (5 in 10 forecasts, 8 p.m.–2 a.m.); Saturday (4 in 10 forecasts, 2–8 p.m.). Drier: Wed, Thu, Fri, Sun, Mon (fewer than 2 in 10 forecasts in any six hours). Times are GMT+8.
How much rain will Beijing get this week?
By Tues., Oct. 6, 2 a.m. GMT+8 (the end of the forecast), the middle forecast has 1.6 mm of rain and melted snow, counting from Tue 8 a.m. Fewer than 1 in 10 forecasts bring 13 mm in total.
How windy will it get in Beijing?
Gusts over 48 km/h: 2 in 10 forecasts at Sat 8 p.m. GMT+8. The middle forecast’s strongest gust is 45 km/h, Wed 2 p.m. Checked every six hours, so a brief peak can fall between.
How warm or cold will it be in Beijing?
At the six-hourly times, the middle forecast runs from 13°C (Thu 2 a.m.) to 27°C (Tue 2 p.m.) GMT+8. The day’s real high and low can fall between those times.
Are any storms heading for Beijing?
No storm Stormlines tracks has 1 in 10 forecasts passing its centre within 160 kilometres of Beijing this week.

Chance of rain, six hours at a time

Tue 8 a.m.–2 p.m.: 1 in 10 forecasts with measurable rain; middle forecast almost noneTue 2–8 p.m.: fewer than 1 in 10 forecasts with measurable rain; middle forecast almost noneTue 8 p.m.–2 a.m.: 5 in 10 forecasts with measurable rain; middle forecast 0.3 mmWed 2–8 a.m.: fewer than 1 in 10 forecasts with measurable rain; middle forecast almost noneWed 8 a.m.–2 p.m.: fewer than 1 in 10 forecasts with measurable rain; middle forecast almost noneWed 2–8 p.m.: fewer than 1 in 10 forecasts with measurable rain; middle forecast almost noneWed 8 p.m.–2 a.m.: fewer than 1 in 10 forecasts with measurable rain; middle forecast almost noneThu 2–8 a.m.: fewer than 1 in 10 forecasts with measurable rain; middle forecast almost noneThu 8 a.m.–2 p.m.: fewer than 1 in 10 forecasts with measurable rain; middle forecast almost noneThu 2–8 p.m.: fewer than 1 in 10 forecasts with measurable rain; middle forecast almost noneThu 8 p.m.–2 a.m.: fewer than 1 in 10 forecasts with measurable rain; middle forecast almost noneFri 2–8 a.m.: fewer than 1 in 10 forecasts with measurable rain; middle forecast almost noneFri 8 a.m.–2 p.m.: fewer than 1 in 10 forecasts with measurable rain; middle forecast almost noneFri 2–8 p.m.: fewer than 1 in 10 forecasts with measurable rain; middle forecast almost noneFri 8 p.m.–2 a.m.: fewer than 1 in 10 forecasts with measurable rain; middle forecast almost noneSat 2–8 a.m.: 3 in 10 forecasts with measurable rain; middle forecast almost noneSat 8 a.m.–2 p.m.: 3 in 10 forecasts with measurable rain; middle forecast almost noneSat 2–8 p.m.: 4 in 10 forecasts with measurable rain; middle forecast almost noneSat 8 p.m.–2 a.m.: 3 in 10 forecasts with measurable rain; middle forecast almost noneSun 2–8 a.m.: 1 in 10 forecasts with measurable rain; middle forecast almost noneSun 8 a.m.–2 p.m.: fewer than 1 in 10 forecasts with measurable rain; middle forecast almost noneSun 2–8 p.m.: fewer than 1 in 10 forecasts with measurable rain; middle forecast almost noneSun 8 p.m.–2 a.m.: fewer than 1 in 10 forecasts with measurable rain; middle forecast almost noneMon 2–8 a.m.: fewer than 1 in 10 forecasts with measurable rain; middle forecast almost noneMon 8 a.m.–2 p.m.: fewer than 1 in 10 forecasts with measurable rain; middle forecast almost noneMon 2–8 p.m.: fewer than 1 in 10 forecasts with measurable rain; middle forecast almost noneMon 8 p.m.–2 a.m.: fewer than 1 in 10 forecasts with measurable rain; middle forecast almost none

Each bar is the share of the 31 forecasts with measurable rain or melted snow in that six hours; the darker the bar, the more forecasts agree. Local days, GMT+8.

The week, day by day

DayChance of rain2.5 mm or moreTotal by day’s endStrongest gustTemperature
Tue 29 (rest of day)5 in 10<1 in 100.3 mm · <1 in 1012 km/h18°C–27°C
Wed 30<1 in 10<1 in 100.3 mm · <1 in 1045 km/h15°C–19°C
Thu 1<1 in 10<1 in 100.3 mm · <1 in 1026 km/h13°C–22°C
Fri 2<1 in 10<1 in 100.3 mm · <1 in 1017 km/h13°C–22°C
Sat 34 in 101 in 101.5 mm · 1 in 1022 km/h14°C–20°C
Sun 41 in 10<1 in 101.5 mm · 1 in 1037 km/h13°C–21°C
Mon 5<1 in 10<1 in 101.6 mm · 1 in 1014 km/h13°C–22°C
Tue 6 (part)–––9 km/h15°C

Chances are the highest in any six hours of the day. “Total by day’s end” is the middle forecast’s running total since Tue 8 a.m., and the share of forecasts with 13 mm or more by then; totals aren’t added up day by day, because the middle forecast of each day isn’t the same forecast. Gusts and temperatures are read every six hours.

Storms near Beijing

No storm Stormlines tracks has 1 in 10 forecasts passing its centre near Beijing this week. Every storm we’re tracking →

About these numbers

They come from one source, NOAA’s Global Ensemble Forecast System (GEFS): 31 runs of the same model, each started slightly differently, read at Beijing’s coordinates on a grid about 55 km (35 miles) apart. “8 in 10 forecasts” means 8 in 10 of those runs. Nothing is adjusted for local effects such as coasts, lakes, hills or city heat, so the numbers can differ from your local official forecast, especially for snow and showers.

“Measurable rain” counts rain or melted snow in a six-hour period. Not an official forecast: follow your national weather service for warnings and decisions. How the forecasts are read: how to read the maps and the glossary.

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