Heat Wave Persists Over the Central U.S.; Significant Flooding Expected in the Northern Mid-Atlantic Tuesday

Dangerous and extreme heat will remain across portions of the Central U.S. this week, persisting across the Mid to Lower Mississippi Valleys, Gulf Coast, Southern Plains and portions of Texas. A heat wave over the Southwest will intensify late this week. Severe thunderstorms and flash flooding will spread from the Great Lakes/Ohio Valley to the Mid-Atlantic and Northeast the next few days. Read More >

Hazardous Weather Conditions

Hazardous Weather Outlook

Current conditions at

Jamestown, Chautauqua County/Jamestown Airport (KJHW)

Lat: 42.15°NLon: 79.27°WElev: 1722ft.

Thunderstorm in Vicinity

73°F

23°C

Humidity	90%
Wind Speed	S 8 mph
Barometer	29.79 in (1008.3 mb)
Dewpoint	70°F (21°C)
Visibility	10.00 mi
Last update	27 Jul 8:56 pm EDT

More Information:

Local Forecast Office More Local Wx 3 Day History Hourly Weather Forecast

Extended Forecast for

Sherman NY

Tonight
Low: 62 °F
Chance
T-storms then
Showers
Tuesday
High: 73 °F
Showers then
Chance
T-storms
Tuesday Night
Low: 58 °F
Showers
Likely
Wednesday
High: 69 °F
Showers
Likely
Wednesday Night
Low: 57 °F
Chance
Showers
Thursday
High: 71 °F
Slight Chance
Showers
Thursday Night
Low: 57 °F
Mostly Clear
Friday
High: 77 °F
Sunny
Friday Night
Low: 59 °F
Partly Cloudy

Detailed Forecast

Tonight

A chance of showers and thunderstorms, then showers and possibly a thunderstorm after 4am. Low around 62. South wind 6 to 10 mph, with gusts as high as 21 mph. Chance of precipitation is 80%. New rainfall amounts between a half and three quarters of an inch possible.

Tuesday

Showers and possibly a thunderstorm, mainly before 10am, then a chance of showers and thunderstorms after 10am. High near 73. Southwest wind 8 to 13 mph becoming northwest in the afternoon. Winds could gust as high as 25 mph. Chance of precipitation is 80%. New rainfall amounts between a quarter and half of an inch possible.

Tuesday Night

Showers likely and possibly a thunderstorm before 11pm, then a chance of showers and thunderstorms between 11pm and 2am, then showers likely and possibly a thunderstorm after 2am. Mostly cloudy, with a low around 58. Northwest wind around 11 mph, with gusts as high as 22 mph. Chance of precipitation is 70%. New rainfall amounts between a quarter and half of an inch possible.

Wednesday

Showers likely, with thunderstorms also possible after 2pm. Mostly cloudy, with a high near 69. Northwest wind 14 to 16 mph, with gusts as high as 26 mph. Chance of precipitation is 70%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.

Wednesday Night

A chance of showers and thunderstorms. Mostly cloudy, with a low around 57. North wind 9 to 11 mph, with gusts as high as 21 mph. Chance of precipitation is 50%. New precipitation amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.

Thursday

A slight chance of showers before 2pm. Mostly sunny, with a high near 71. North wind 9 to 11 mph. Chance of precipitation is 20%.

Thursday Night

Mostly clear, with a low around 57. Northwest wind around 5 mph becoming calm in the evening.

Friday

Sunny, with a high near 77. Calm wind becoming northwest 5 to 7 mph in the afternoon.

Friday Night

Partly cloudy, with a low around 59.

Saturday

Partly sunny, with a high near 79.

Saturday Night

A chance of showers. Mostly cloudy, with a low around 61. Chance of precipitation is 40%.