Japanese
Skip Navigation About Us Access Links Site Map
Home
Weather/Earthquakes
Services
Publications/Periodicals
News Releases
For NMHSs
Home > Weather and Earthquakes > One-week Forecasts

One-week Forecasts: Niigata

Get more information on this area
Prefecture

Updated at 05:00 JST, 17 December 2017

Date 17
Sun
18
Mon
19
Tue
20
Wed
21
Thu
22
Fri
23
Sat
Niigata

HEAVY SNOWSTORMS SNOW THROUGHOUT THE DAY CLOUDY, OCCASIONAL SCATTERED SHOWERS OR SNOW FLURRIES CLOUDY, SNOW FLURRIES OR OCCASIONAL SCATTERED SHOWERS CLOUDY, OCCASIONAL SCATTERED SHOWERS OR SNOW FLURRIES CLOUDY, OCCASIONAL SCATTERED SHOWERS OR SNOW FLURRIES MOSTLY CLOUDY
Probability of
precipitation (%)
-/80/60/50 50/50/80/80 80 60 50 50 40
Reliability / / A C C C C
Niigata High (°C) 4
6
9
(7 – 11)
5
(4 – 7)
8
(6 – 10)
7
(5 – 9)
7
(5 – 10)
Low (°C) / -1
3
(2 – 5)
1
(0 – 3)
0
(-1 – 2)
2
(0 – 4)
1
(-1 – 2)
Normal Precipitation Low High
Niigata 34 – 57 mm 2.1°C 8.0°C

One-week forecasts for individual prefectures are issued at 11:00 and 17:00 JST every day. The latest daily forecasts are displayed in the columns for the first and second days. The probability of precipitation for today and tomorrow is displayed with six hours as a unit (i.e., 00 – 06/06 – 12/12 – 18/18 – 24 JST).
Figures shown in parentheses in the low and high temperature rows indicate the ranges of error in degrees Celsius. The reliability for the day is represented as A, B or C in descending order of expected accuracy. The results of precipitation forecast accuracy verification for the period from 1 April 2002 to 31 March 2007 indicate an average accuracy of 86% for A, 72% for B and 56% for C.
Values in the normal precipitation column represent the range of normal cumulative precipitation amounts for the coming seven days, while the figures in the normal low/high temperature columns represent those for the fourth day of the period.