Excessive Rainfall and Potential Tropical Cyclone in the South; Severe Thunderstorms in the Midwest

Excessive rainfall may produce locally considerable flash flooding over parts of the northwestern Gulf Coast, lower Mississippi River Valley, and Deep South through Thursday. Potential Tropical Cyclone One is forecast to become a tropical storm (Arthur) as it moves along or just off the northwestern Gulf coast through Wednesday. An outbreak of severe weather is forecast in the Midwest Wednesday. Read More >

Current conditions at

Mondell Field (KECS)

Lat: 43.89° N Lon: 104.32° W Elev: 4173 ft.

Mostly Cloudy

82°F

28°C

Humidity 15%
Wind Speed NW 13 G 20 mph
Barometer 29.64 in
Dewpoint 30°F (-1°C)
Visibility 10.00 mi
Heat Index80°F (27°C)
Last update 16 Jun 4:55 pm MDT
Detailed forecast for

Newcastle

Late This Afternoon
Mostly sunny. Near steady temperature in the upper 80s. Northwest winds 15 to 20 mph with gusts up to 30 mph.
Tonight
Mostly clear in the evening, then partly cloudy with a slight chance of showers after midnight. Lows in the upper 50s. Northwest winds 10 to 20 mph with gusts up to 35 mph. Chance of rain 20 percent.
Wednesday
Mostly sunny and windy. Highs in the lower 70s. Northwest winds 25 to 35 mph with gusts up to 45 mph.
Wednesday Night
Partly cloudy and breezy. Lows in the upper 40s. Northwest winds 15 to 25 mph with gusts up to 45 mph, diminishing to 5 to 10 mph with gusts up to 20 mph after midnight.
Thursday
Mostly sunny in the morning, then partly cloudy with a chance of showers in the afternoon. Highs in the mid 70s. Northwest winds 10 to 15 mph with gusts up to 25 mph. Chance of rain 30 percent.
Thursday Night
Mostly clear. Lows in the upper 40s. Northeast winds 5 to 10 mph. Gusts up to 20 mph in the evening.
Juneteenth
Mostly sunny. Highs in the lower 80s.
Friday Night
Mostly clear in the evening, then becoming partly cloudy. Lows in the mid 50s.
Saturday
Mostly cloudy in the morning, then partly cloudy with a chance of showers and thunderstorms in the afternoon. Breezy with highs in the lower 80s. Chance of rain 50 percent.
Saturday Night
Showers likely with a chance of thunderstorms in the evening, then showers likely with a slight chance of thunderstorms after midnight. Breezy with lows in the lower 50s. Chance of rain 70 percent.
Sunday
Showers likely. A chance of thunderstorms in the afternoon. Highs in the lower 70s. Chance of rain 70 percent.
Sunday Night
A slight chance of thunderstorms in the evening. Partly cloudy with a chance of showers. Lows in the upper 40s. Chance of rain 40 percent.
Monday
Becoming partly cloudy. A chance of showers. A slight chance of thunderstorms in the afternoon. Highs in the mid 70s. Chance of rain 50 percent.
Monday Night
Mostly clear in the evening, then becoming partly cloudy. A chance of showers. A chance of thunderstorms in the evening, then a slight chance of thunderstorms after midnight. Lows in the upper 40s. Chance of rain 50 percent.
Tuesday
Partly cloudy with a slight chance of showers in the morning, then mostly sunny with a chance of showers with a slight chance of thunderstorms in the afternoon. Highs in the upper 70s. Chance of rain 50 percent.



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330 PM MDT Tue Jun 16 2026
 
 

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