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

This week’s weatherCharlotte, NC

Rain is likely in Charlotte on Saturday

7 in 10 of NOAA’s 31 GEFS forecasts bring measurable rain to Charlotte Sat 8 p.m.–2 a.m. EDT; 3 in 10 bring a tenth of an inch or more.

NOAA GEFS, 31 forecasts · Mon 28 Sep 18Z run · updated Mon., Sept. 28, 7:03 p.m. EDT · times are Charlotte’s (EDT)

See it on the globe Official National Weather Service forecast

Quick answers

Will it rain in Charlotte this week?
The best chances of measurable rain: Saturday (7 in 10 forecasts, 8 p.m.–2 a.m.); Sunday, Oct. 4 (7 in 10 forecasts, 2–8 p.m.); Monday, Oct. 5 (7 in 10 forecasts, 8 a.m.–2 p.m.). Drier: Tue, Wed, Thu, Fri (fewer than 2 in 10 forecasts in any six hours). Times are EDT.
How much rain will Charlotte get this week?
By Mon., Oct. 5, 2 p.m. EDT (the end of the forecast), the middle forecast has 0.64 in of rain and melted snow, counting from Mon 8 p.m. 7 in 10 forecasts bring 0.5 in or more in total; 4 in 10 forecasts bring 1 in or more.
How windy will it get in Charlotte?
No strong gusts: fewer than 1 in 10 forecasts have gusts over 30 mph at any of the six-hourly times. The middle forecast’s strongest gust is 13 mph, Thu 2 a.m. Checked every six hours, so a brief peak can fall between.
How warm or cold will it be in Charlotte?
At the six-hourly times, the middle forecast runs from 57°F (Tue 8 a.m.) to 87°F (Thu 2 p.m.) EDT. The day’s real high and low can fall between those times.
Are any storms heading for Charlotte?
No storm Stormlines tracks has 1 in 10 forecasts passing its centre within 100 miles of Charlotte this week.

Chance of rain, six hours at a time

Mon 8 p.m.–2 a.m.: fewer than 1 in 10 forecasts with measurable rain; middle forecast almost noneTue 2–8 a.m.: fewer than 1 in 10 forecasts with measurable rain; middle forecast almost noneTue 8 a.m.–2 p.m.: fewer than 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.: fewer than 1 in 10 forecasts with measurable rain; middle forecast almost noneWed 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.: 1 in 10 forecasts with measurable rain; middle forecast almost noneFri 2–8 p.m.: 1 in 10 forecasts with measurable rain; middle forecast almost noneFri 8 p.m.–2 a.m.: 2 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.: 4 in 10 forecasts with measurable rain; middle forecast almost noneSat 2–8 p.m.: 6 in 10 forecasts with measurable rain; middle forecast 0.02 inSat 8 p.m.–2 a.m.: 7 in 10 forecasts with measurable rain; middle forecast 0.05 inSun 2–8 a.m.: 6 in 10 forecasts with measurable rain; middle forecast 0.03 inSun 8 a.m.–2 p.m.: 6 in 10 forecasts with measurable rain; middle forecast 0.02 inSun 2–8 p.m.: 7 in 10 forecasts with measurable rain; middle forecast 0.04 inSun 8 p.m.–2 a.m.: 7 in 10 forecasts with measurable rain; middle forecast 0.05 inMon 2–8 a.m.: 6 in 10 forecasts with measurable rain; middle forecast 0.09 inMon 8 a.m.–2 p.m.: 7 in 10 forecasts with measurable rain; middle forecast 0.05 in

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, EDT.

The week, day by day

DayChance of rainA tenth of an inch or moreTotal by day’s endStrongest gustTemperature
Mon 28 (rest of day)<1 in 10<1 in 10almost none · <1 in 109 mph66°F
Tue 29<1 in 10<1 in 10almost none · <1 in 109 mph57°F–85°F
Wed 30<1 in 10<1 in 10almost none · <1 in 107 mph61°F–86°F
Thu 1<1 in 10<1 in 10almost none · <1 in 1013 mph64°F–87°F
Fri 22 in 101 in 10almost none · <1 in 1010 mph67°F–87°F
Sat 37 in 103 in 100.11 in · 2 in 108 mph70°F–86°F
Sun 47 in 103 in 100.31 in · 3 in 1012 mph69°F–79°F
Mon 5 (part)7 in 105 in 100.64 in · 7 in 1010 mph67°F–72°F

Chances are the highest in any six hours of the day. “Total by day’s end” is the middle forecast’s running total since Mon 8 p.m., and the share of forecasts with 0.5 in 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 Charlotte

No storm Stormlines tracks has 1 in 10 forecasts passing its centre near Charlotte 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 Charlotte’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: see the National Weather Service forecast for warnings and decisions. How the forecasts are read: how to read the maps and the glossary.

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