740 FNUS55 KMSO 212040 FWFMSO Fire Weather Planning Forecast for Wrn Montana and N Cntrl Idaho National Weather Service Missoula MT 240 PM MDT TUE JUL 21 2015 ...Isolated Wednesday morning lightning west central MT followed by very lower RH in afternoon NW MT... ...Increasing thunderstorm threat southwest MT Wednesday afternoon and Thursday... .DISCUSSION... Idaho: An area of moisture will move across the Clearwater/Nez Perce early Wednesday and possible produce isolated thunderstorms. A drier air mass should move back over the much the area Wednesday afternoon, except the eastern Clearwater where some moisture and instability will linger. A weather disturbance will brush the area Thursday and produce more instability and moisture, especially the eastern half of the clearwater/Nez Perce. A drier westerly flow is expected Friday. Montana: An area of moisture is expected to move across west central Montana early Wednesday producing isolated thunderstorms. A much drier air mass should move over northwest Montana Wednesday afternoon. A rather moist and unstable atmosphere is expected from about the Bitterroots eastwards across the Beaverhead/Deerlodge both Wednesday and Thursday. A drier westerly flow should return Friday. Follow us on Twitter at https://twitter.com/NWSMissoula IDZ102-103-222045- PALOUSE/HELLS CANYON-CLEARWATER/NEZ PERCE- 140 PM PDT TUE JUL 21 2015 .Tonight... * Sky/Weather.........Partly cloudy. Slight chance of thunderstorms after midnight. * Min Temperature.....50-60. * Max Humidity........64-74 percent valleys and 54-64 percent ridges. * 20-Foot Winds....... * Lower Elevation......West 5-10 mph. * Ridge Top............Northwest 5-10 mph becoming southwest up to 5 mph late in the night. * LAL.................2. * CWR (> 0.10 Inch)...10 percent. .Wednesday... * Sky/Weather.........Partly cloudy. Chance of showers and thunderstorms...mainly eastern part near Bitterroot Mountains. * Max Temperature.....80-90 valleys and 70-75 ridges. * Min Humidity........13-23 percent valleys and 20-30 percent ridges. * 20-Foot Winds....... * Lower Elevation......West 5-15 mph. * Ridge Top............West 5-15 mph. * Haines Index........3 very low. * LAL.................1 in the Palouse/Hells Canyon...and 2 in the Clearwater/Nez Perce. * CWR (> 0.10 Inch)...10 percent. .Wednesday Night... * Sky/Weather.........Partly cloudy. Chance of showers and thunderstorms...mainly late. * Min Temperature.....53-63 valleys and 43-53 ridges. * Max Humidity........64-74 percent. * 20-Foot Winds....... * Lower Elevation......West 5-10 mph. * Ridge Top............West 5-15 mph becoming northwest up to 5 mph after midnight. * LAL.................1 in the Palouse/Hells Canyon...and 2 in the Clearwater/Nez perce. * CWR (> 0.10 Inch)...10 percent. .Thursday... * Sky/Weather.........Partly cloudy. Chance of showers and thunderstorms...mainly east part. * Max Temperature.....80-85 valleys and 70-75 ridges. * Min Humidity........12-22 percent valleys and 25-35 percent ridges. * 20-Foot Winds....... * Lower Elevation......Becoming upslope/upvalley 4-8 mph in the afternoon. * Ridge Top............Southwest up to 5 mph increasing to 10-15 mph in the afternoon. * Haines Index........3 very low. * LAL.................2 in the Palouse/Hells Canyon...and 3 in the Clearwater/Nez perce. * CWR (> 0.10 Inch)...20 percent. .Friday...Partly cloudy. Lows 50-60. Highs 80-90. West winds 10-15 mph. .Saturday...Partly cloudy. Slight chance of showers and thunderstorms late. Lows 55-65. Highs 80-90. Southwest winds 10-15 mph. .Sunday...Partly cloudy with slight chance of showers and thunderstorms. Lows 55-65. Highs 75-85. West winds 10-15 mph. .Monday...Partly cloudy. Slight chance of showers and thunderstorms. Lows 50-60. Highs 75-85. .Tuesday...Mostly clear. Lows 50-60. Highs 80-90. $$ MTZ104-105-222045- KOOTENAI-FLATHEAD/GLACIER PARK- 240 PM MDT TUE JUL 21 2015 .Tonight... * Sky/Weather.........Partly cloudy. * Min Temperature.....48-53 valleys and 59-64 ridges. * Max Humidity........81-91 percent valleys and 45-55 percent ridges. * 20-Foot Winds....... * Lower Elevation......South 5-10 mph. * Ridge Top............Southwest 5-15 mph. * LAL.................1. * CWR (> 0.10 Inch)...0 percent. .Wednesday... * Sky/Weather.........Partly cloudy. * Max Temperature.....75-80 valleys and 65-70 ridges. * Min Humidity........10-15 percent valleys and 17-27 percent ridges. * 20-Foot Winds....... * Lower Elevation......Becoming southwest 10-15 mph in the afternoon. * Ridge Top............Southwest 15-25 mph. * Haines Index........4 low. * LAL.................1. * CWR (> 0.10 Inch)...0 percent. .Wednesday Night... * Sky/Weather.........Partly cloudy. Slight chance of showers. * Min Temperature.....45-55. * Max Humidity........80-90 percent valleys and 62-72 percent ridges. * 20-Foot Winds....... * Lower Elevation......Southwest 5-15 mph in the evening becoming downslope/downvalley 2-5 mph. * Ridge Top............West 10-20 mph. * LAL.................1. * CWR (> 0.10 Inch)...10 percent. .Thursday... * Sky/Weather.........Partly cloudy. * Max Temperature.....75-80 valleys and 65-70 ridges. * Min Humidity........15-25 percent valleys and 25-35 percent ridges. * 20-Foot Winds....... * Lower Elevation......Variable less than 7 mph becoming southwest 5-15 mph. * Ridge Top............Southwest 5-15 mph. * Haines Index........3 very low. * LAL.................1. * CWR (> 0.10 Inch)...0 percent. .Friday...Partly cloudy. Lows 45-55. Highs 70-80. Southwest winds 5-15 mph. .Saturday...Partly cloudy with slight chance of showers and thunderstorms. Lows 50-60. Highs 75-85. Southwest winds 10-20 mph. .Sunday...Partly cloudy with chance of showers and thunderstorms. Lows 50-60. Highs 70-80. Southwest winds 10-15 mph. .Monday...Partly cloudy. Chance of showers and slight chance of thunderstorms. Lows 45-55. Highs 70-80. .Tuesday...Partly cloudy. Slight chance of showers and thunderstorms. Lows 45-55. Highs 75-85. $$ MTZ106-108-222045- WEST LOLO-EAST LOLO- 240 PM MDT TUE JUL 21 2015 .Tonight... * Sky/Weather.........Partly cloudy. Slight chance of thunderstorms after midnight. * Min Temperature.....50-60. * Max Humidity........66-76 percent valleys and 49-59 percent ridges. * 20-Foot Winds....... * Lower Elevation......West 5-10 mph. * Ridge Top............Southwest 5-15 mph. * LAL.................2. * CWR (> 0.10 Inch)...20 percent. .Wednesday... * Sky/Weather.........Partly cloudy. Chance of showers and thunderstorms. * Max Temperature.....80-85 valleys and 65-75 ridges. * Min Humidity........11-16 percent valleys and 20-30 percent ridges. * 20-Foot Winds....... * Lower Elevation......Becoming 5-15 mph in the afternoon. * Ridge Top............West 5-15 mph. * Haines Index........4 low. * LAL.................2. * CWR (> 0.10 Inch)...10 percent. .Wednesday Night... * Sky/Weather.........Partly cloudy. Chance of showers and thunderstorms. * Min Temperature.....45-55. * Max Humidity........62-72 percent. * 20-Foot Winds....... * Lower Elevation......West 5-15 mph in the evening becoming downslope/downvalley 2-5 mph. * Ridge Top............West 5-15 mph. * LAL.................2. * CWR (> 0.10 Inch)...20 percent. .Thursday... * Sky/Weather.........Partly cloudy. Chance of showers and thunderstorms. * Max Temperature.....80-85 valleys and 65-75 ridges. * Min Humidity........15-21 percent valleys and 24-34 percent ridges. * 20-Foot Winds....... * Lower Elevation......Variable less than 7 mph...becoming west 5-15 mph. * Ridge Top............West 5-15 mph. * Haines Index........4 low. * LAL.................3. * CWR (> 0.10 Inch)...20 percent. .Friday...Partly cloudy. Lows 45-55. Highs 75-85. West winds 10-15 mph. .Saturday...Partly Cloudy. Slight chance of showers and thunderstorms. Lows 50-60. Highs 80-90. Southwest winds 10-20 mph. .Sunday...Partly cloudy with chance of showers and thunderstorms. Lows 55-65. Highs 75-85. Southwest winds 10-15 mph. .Monday...Partly cloudy. Chance of showers and thunderstorms. Lows 50-60. Highs 70-80. .Tuesday...Partly cloudy. Chance of showers and slight chance of thunderstorms. Lows 45-55. Highs 75-85. $$ MTZ107-222045- SALISH AND KOOTENAI RESERVATION- 240 PM MDT TUE JUL 21 2015 .Tonight... * Sky/Weather.........Clear then becoming partly cloudy. Slight chance of light showers or a thunderstorm towards morning. * Min Temperature.....55-60. * Max Humidity........64-74 percent valleys and 51-61 percent ridges. * 20-Foot Winds....... * Lower Elevation......West 10-15 mph early in the evening becoming downslope/downvalley 2-5 mph. * Ridge Top............West 5-15 mph becoming southwest up to 5 mph after midnight. * LAL.................2. * CWR (> 0.10 Inch)...10 percent. .Wednesday... * Sky/Weather.........Mostly cloudy then becoming mostly sunny. Chance of showers or a thunderstorm in the morning. * Max Temperature.....80-85 valleys and 65-70 ridges. * Min Humidity........9-14 percent valleys and 11-21 percent ridges. * 20-Foot Winds....... * Lower Elevation......Becoming west 5-15 mph in the afternoon. * Ridge Top............West 10-20 mph. * Haines Index........4 low. * LAL.................2. * CWR (> 0.10 Inch)...10 percent. .Wednesday Night... * Sky/Weather.........Mostly clear. Slight chance of showers and thunderstorms late. * Min Temperature.....45-55. * Max Humidity........62-72 percent valleys and 54-64 percent ridges. * 20-Foot Winds....... * Lower Elevation......West 5-15 mph in the evening becoming downslope/downvalley 2-5 mph. * Ridge Top............West 10-20 mph decreasing to 5-10 mph after midnight. * LAL.................2. * CWR (> 0.10 Inch)...10 percent. .Thursday... * Sky/Weather.........Partly cloudy. Chance of showers and thunderstorms...mainly south part. * Max Temperature.....80-85 valleys and 60-65 ridges. * Min Humidity........15-20 percent valleys and 20-30 percent ridges. * 20-Foot Winds....... * Lower Elevation......Variable less than 7 mph. * Ridge Top............West 5-15 mph. * Haines Index........3 very low. * LAL.................3. * CWR (> 0.10 Inch)...10 percent. .Friday...Partly cloudy. Lows 45-55. Highs 75-85. Southwest winds 10-15 mph. .Saturday...Partly Cloudy. Slight chance of showers and thunderstorms. Lows 55-65. Highs 80-90. Southwest winds 10-20 mph. .Sunday...Partly cloudy with chance of showers and thunderstorms. Lows 55-65. Highs 75-85. Southwest winds 10-15 mph. .Monday...Partly cloudy. Chance of showers and thunderstorms. Lows 55-65. Highs 75-85. .Tuesday...Partly cloudy. Chance of showers and slight chance of thunderstorms. Lows 45-55. Highs 80-90. $$ MTZ109-222045- BITTERROOT- 240 PM MDT TUE JUL 21 2015 .Tonight... * Sky/Weather.........Partly cloudy then becoming mostly cloudy. Chance of showers and slight chance of thunderstorms early this evening south part and the entire area after midnight. * Min Temperature.....55-60. * Max Humidity........71-81 percent valleys and 55-65 percent ridges. * 20-Foot Winds....... * Lower Elevation......Northwest 5-10 mph in the evening becoming downslope/downvalley 1-3 mph. * Ridge Top............North 5-10 mph becoming southwest up to 5 mph late in the night. * LAL.................2. * CWR (> 0.10 Inch)...20 percent. .Wednesday... * Sky/Weather.........Mostly cloudy. Showers likely and chance of thunderstorms. * Max Temperature.....75-85 valleys and 65-70 ridges. * Min Humidity........21-31 percent valleys and 31-41 percent ridges. * 20-Foot Winds....... * Lower Elevation......Variable less than 7 mph. * Ridge Top............West 5-15 mph. * Haines Index........3 very low. * LAL.................3. * CWR (> 0.10 Inch)...40 percent. .Wednesday Night... * Sky/Weather.........Mostly cloudy. Chance of showers and thunderstorms. * Min Temperature.....45-55. * Max Humidity........77-87 percent. * 20-Foot Winds....... * Lower Elevation......West 5-15 mph in the evening becoming downslope/downvalley 2-5 mph...then becoming variable less than 5 mph early in the morning. * Ridge Top............West 5-15 mph becoming southwest up to 5 mph after midnight. * LAL.................3. * CWR (> 0.10 Inch)...40 percent. .Thursday... * Sky/Weather.........Mostly cloudy. Showers likely and chance of thunderstorms. * Max Temperature.....75-80 valleys and 65-70 ridges. * Min Humidity........31-41 percent. * 20-Foot Winds....... * Lower Elevation......Variable less than 7 mph. * Ridge Top............Southwest up to 5 mph increasing to 10-15 mph in the afternoon. * Haines Index........4 low. * LAL.................3. * CWR (> 0.10 Inch)...40 percent. .Friday...Partly cloudy. Lows 45-55. Highs 75-85. West winds 10-15 mph. .Saturday...Partly Cloudy. Slight chance of showers and thunderstorms. Lows 50-60. Highs 75-85. Southwest winds 10-15 mph. .Sunday...Partly cloudy with chance of showers and thunderstorms. Lows 50-60. Highs 75-85. Southwest winds 10-15 mph. .Monday...Cooler. Partly cloudy. Chance of showers and thunderstorms. Lows 50-60. Highs 65-75. .Tuesday...Partly cloudy. Chance of showers and slight chance of thunderstorms. Lows 45-55. Highs 70-80. $$ MTZ110-111-222045- DEERLODGE/WEST BEAVERHEAD-EAST BEAVERHEAD- 240 PM MDT TUE JUL 21 2015 .Tonight... * Sky/Weather.........Partly cloudy then becoming mostly cloudy. Isolated showers and thunderstorms this evening and again towards morning. * Min Temperature.....45-55. * Max Humidity........84-94 percent valleys and 64-74 percent ridges. * 20-Foot Winds....... * Lower Elevation......West 5-10 mph becoming variable less than 5 mph after midnight. * Ridge Top............West 5-10 mph becoming south after midnight. * LAL.................2. * CWR (> 0.10 Inch)...10 percent. .Wednesday... * Sky/Weather.........Mostly cloudy. Showers likely and chance of thunderstorms. * Max Temperature.....70-80 valleys and 65-70 ridges. * Min Humidity........28-38 percent valleys and 34-44 percent ridges. * 20-Foot Winds....... * Lower Elevation......Variable less than 7 mph...becoming southwest 5-15 mph * Ridge Top............Southwest 5-15 mph. * Haines Index........3 very low. * LAL.................4. * CWR (> 0.10 Inch)...50 percent. .Wednesday Night... * Sky/Weather.........Mostly cloudy. Showers likely and chance of thunderstorms. * Min Temperature.....45-55. * Max Humidity........83-93 percent. * 20-Foot Winds....... * Lower Elevation......Southwest 5-10 mph. * Ridge Top............Southwest 5-10 mph. * LAL.................3. * CWR (> 0.10 Inch)...40 percent. .Thursday... * Sky/Weather.........Mostly cloudy. Showers likely and chance of thunderstorms. * Max Temperature.....68-78 valleys and 60-65 ridges. * Min Humidity........36-46 percent. * 20-Foot Winds....... * Lower Elevation......Variable less than 7 mph. * Ridge Top............Southwest 5-15 mph. * Haines Index........4 low. * LAL.................4. * CWR (> 0.10 Inch)...50 percent. .Friday...Partly cloudy with a slight chance of showers. Lows 45-55. Highs 70-80. Southwest winds 10-15 mph. .Saturday...Partly cloudy with slight chance of showers and thunderstorms. Lows 45-55. Highs 75-85. Southwest winds 10-15 mph. .Sunday...Partly cloudy with slight chance of showers and thunderstorms. Lows 50-60. Highs 75-85. Southwest winds 10-15 mph. .Monday...Partly cloudy. Chance of showers and slight chance of thunderstorms. Lows 50-60. Highs 70-80. .Tuesday...Partly cloudy. Chance of showers and slight chance of thunderstorms. Lows 45-55. Highs 70-80. $$