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WHAT: Extremely hot daytime temperatures combined with warm overnight low temperatures will produce cumulative heat stress.
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WHERE: Portions of southeast Montana and north central Wyoming.
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WHEN: Until midnight MDT Wednesday Night.
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IMPACTS: Heat related illnesses increase significantly during extreme heat events.
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ADDITIONAL DETAILS: Dangerously hot conditions with temperatures of 104 to 112 today. Highs temperatures Monday through Wednesday will range from 100 to 105. Overnight lows will remain well above normal.
* WHAT...Extremely hot daytime temperatures combined with warm overnight low temperatures will produce cumulative heat stress. * WHERE...Portions of southeast Montana and north central Wyoming. * WHEN...Until midnight MDT Wednesday Night. * IMPACTS...Heat related illnesses increase significantly during extreme heat events. * ADDITIONAL DETAILS...Dangerously hot conditions with temperatures of 104 to 112 today. Highs temperatures Monday through Wednesday will range from 100 to 105. Overnight lows will remain well above normal.
Drink plenty of fluids, stay in an air-conditioned room, stay out of the sun, plan outdoor activities during the early morning and late evening hours, and check up on relatives and neighbors. Do not leave young children and pets in unattended vehicles. Car interiors will reach lethal temperatures in a matter of minutes.
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IMPACTS: Low humidities, hot temperatures, and gusty winds will create erratic fire behavior and new fire starts.
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AFFECTED AREA: In North Central WY Fire Zone,274. In South Central MT Fire Zones,123,124,125,126,127 128,129. In Southeast MT Fire Zones,130,131,132. In Southeast MT and Northwest SD Fire Zone,133.
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COUNTIES AFFECTED: In Central MT,Golden Valley,Musselshell,Wheatland. In North Central WY,Sheridan. In Northwest SD,Harding. In South Central MT,Big Horn,Carbon,Park,Stillwater Sweet Grass,Yellowstone. In Southeast MT,Carter,Custer,Fallon,Powder River Rosebud,Treasure. In Southwest MT,Gallatin.
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WIND: South 10 to 20 mph with gusts up to 35 mph.
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HUMIDITY: Minimums of 5 to 10 percent.
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TEMPERATURES: 105 to 112.
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COLD FRONT: Arrives over south central Montana this evening, bringing a shift to breezy northwest winds. The front will reach far southeast Montana early Monday morning. Before the frontal passage, a southeasterly low level jet will produce gusty ridgetop winds (up to 40 mph) and a slow humidity recovery over southeast Montana tonight.
* IMPACTS: Low humidities, hot temperatures, and gusty winds will create erratic fire behavior and new fire starts. * AFFECTED AREA: In North Central WY Fire Zone...274. In South Central MT Fire Zones...123...124...125...126...127 128...129. In Southeast MT Fire Zones...130...131...132. In Southeast MT and Northwest SD Fire Zone...133. * COUNTIES AFFECTED: In Central MT...Golden Valley...Musselshell...Wheatland. In North Central WY...Sheridan. In Northwest SD...Harding. In South Central MT...Big Horn...Carbon...Park...Stillwater Sweet Grass...Yellowstone. In Southeast MT...Carter...Custer...Fallon...Powder River Rosebud...Treasure. In Southwest MT...Gallatin. * WIND: South 10 to 20 mph with gusts up to 35 mph. * HUMIDITY: Minimums of 5 to 10 percent. * TEMPERATURES: 105 to 112. * COLD FRONT: Arrives over south central Montana this evening, bringing a shift to breezy northwest winds. The front will reach far southeast Montana early Monday morning. Before the frontal passage, a southeasterly low level jet will produce gusty ridgetop winds (up to 40 mph) and a slow humidity recovery over southeast Montana tonight.
A Red Flag Warning means that critical fire weather conditions are either occurring now, or will shortly. A combination of strong winds, low relative humidity, and warm temperatures can contribute to extreme fire behavior.
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