003 FNUS55 KMSO 071016 FWFMSO Fire Weather Planning Forecast for Wrn Montana and N Cntrl Idaho National Weather Service Missoula MT 416 AM MDT Wed Aug 7 2019 .DISCUSSION... Idaho: Significant changes to much cooler and wetter weather are on the way by Friday. But first, we will navigate through what are likely to be two of the hottest days in 2019 (today and Thursday) and follow this with a steadily increasing threat for showers and thunderstorms each day. There will be a very good chance for heavy rain with storms on Friday and Saturday with temperatures diving well below normal by Sunday. Montana: Significant changes to much cooler and wetter weather are on the way by Friday. But first, we will navigate through what are likely to be two of the hottest days in 2019 (today and Thursday) along with a steadily increasing threat for showers and thunderstorms each day. Today's threat will extend as far north as the Bitterroot NF and then into the Lolo NF by tomorrow. However, by Friday all districts will have the chance for thunderstorms. These storms are expected to be slow moving and possess an impressive amount of moisture. A similar threat is expected on Saturday with dramatically cooler conditions on Sunday. View Fire Weather Briefing videos on our YouTube channel at https://www.youtube.com/NWSMissoula IDZ102-103-081030- Palouse/Hells Canyon-Clearwater/Nez Perce- 316 AM PDT Wed Aug 7 2019 .TODAY... * Sky/Weather.........Mostly sunny. Patchy smoke. Slight chance of rain showers and thunderstorms. * Max Temperature.....93-103 valleys and 80-85 ridges. * Min Humidity........19-29 percent. * 20-Foot Winds....... * Lower Elevation......Becoming upslope/upvalley 4-8 mph late in the afternoon. * Ridge Top............South up to 5 mph becoming northwest 5-15 mph in the late morning and afternoon. * Haines Index........4 low. * LAL.................2. * CWR (> 0.10 Inch)...0 percent. .TONIGHT... * Sky/Weather.........Partly cloudy. Patchy smoke. Slight chance of rain showers and thunderstorms. * Min Temperature.....55-65. * Max Humidity........51-61 percent. * 20-Foot Winds....... * Lower Elevation......Downslope/downvalley 2-5 mph. * Ridge Top............Northwest 5-15 mph becoming northeast 5-10 mph in the late evening and early morning, then becoming southeast early in the morning. * LAL.................2. * CWR (> 0.10 Inch)...0 percent. .THURSDAY... * Sky/Weather.........Partly cloudy. Patchy smoke in the morning. Chance of rain showers and thunderstorms. * Max Temperature.....90-100 valleys and 75-85 ridges. * Min Humidity........22-32 percent valleys and 29-39 percent ridges. * 20-Foot Winds....... * Lower Elevation......Becoming upslope/upvalley 4-8 mph late in the afternoon. * Ridge Top............Southwest 10-20 mph. * Haines Index........4 low. * LAL.................2 in the Palouse/Hells Canyon...and 4 in the Clearwater/Nez Perce. * CWR (> 0.10 Inch)...0 percent in the Palouse/Hells Canyon...and 20 percent in the Clearwater/Nez Perce. .FRIDAY...Mostly cloudy with chance of rain showers and slight chance of thunderstorms. Lows 60-70. Highs 80-90. South winds 10-15 mph. .SATURDAY...Not as warm. Mostly cloudy with chance of rain showers and thunderstorms. Lows 55-65. Highs 70-80. East winds 10-15 mph. .SUNDAY...Mostly cloudy with chance of rain showers and slight chance of thunderstorms. Lows 50-60. Highs 65-75. West winds 10-15 mph. .MONDAY...Partly cloudy. Chance of rain showers. Lows 50-60. Highs 70-80. .TUESDAY...Mostly clear. Lows 50-60. Highs 75-85. $$ MTZ104-105-081030- Kootenai-Flathead/Glacier Park- 416 AM MDT Wed Aug 7 2019 .TODAY... * Sky/Weather.........Mostly sunny. Patchy smoke. * Max Temperature.....90-100 valleys and 73-83 ridges. * Min Humidity........13-23 percent valleys and 23-33 percent ridges. * 20-Foot Winds....... * Lower Elevation......Becoming upslope/upvalley 4-8 mph late in the afternoon. * Ridge Top............East 5-10 mph becoming southwest late in the morning, then becoming west 5-15 mph in the afternoon. * Haines Index........4 low. * LAL.................1. * CWR (> 0.10 Inch)...0 percent. .TONIGHT... * Sky/Weather.........Mostly clear. Patchy smoke. * Min Temperature.....50-60. * Max Humidity........59-69 percent valleys and 45-55 percent ridges. * 20-Foot Winds....... * Lower Elevation......Southwest 5-10 mph early in the evening becoming downslope/downvalley 2-5 mph. * Ridge Top............South 5-15 mph. * LAL.................1. * CWR (> 0.10 Inch)...0 percent. .THURSDAY... * Sky/Weather.........Mostly sunny. Patchy smoke in the morning. * Max Temperature.....90-100 valleys and 75-85 ridges. * Min Humidity........11-21 percent valleys and 22-32 percent ridges. * 20-Foot Winds....... * Lower Elevation......Becoming upslope/upvalley 4-8 mph late in the afternoon. * Ridge Top............South 5-10 mph becoming west 5-15 mph in the afternoon. * Haines Index........5 moderate. * LAL.................1. * CWR (> 0.10 Inch)...0 percent. .FRIDAY...Not as warm. Mostly cloudy with chance of rain showers and thunderstorms. Lows 60-70. Highs 70-80. Southwest winds 10-15 mph. .SATURDAY...Mostly cloudy with chance of rain showers and thunderstorms. Lows 55-65. Highs 70-80. East winds 10-15 mph. .SUNDAY...Cooler. Cloudy with rain showers and chance of thunderstorms. Lows 50-60. Highs 60-70. South winds 10-15 mph. .MONDAY...Mostly cloudy. Slight chance of rain showers. Lows 50-60. Highs 65-75. .TUESDAY...Partly cloudy. Lows 45-55. Highs 70-80. $$ MTZ106-108-081030- West Lolo-East Lolo- 416 AM MDT Wed Aug 7 2019 .TODAY... * Sky/Weather.........Mostly sunny. Patchy smoke. Slight chance of rain showers and thunderstorms. * Max Temperature.....88-98 valleys and 78-88 ridges. * Min Humidity........17-27 percent. * 20-Foot Winds....... * Lower Elevation......Becoming upslope/upvalley 4-8 mph late in the afternoon. * Ridge Top............South 5-10 mph becoming west 10-20 mph in the afternoon. * Haines Index........5 moderate. * LAL.................2. * CWR (> 0.10 Inch)...0 percent. .TONIGHT... * Sky/Weather.........Partly cloudy. Patchy smoke. Slight chance of rain showers and thunderstorms. * Min Temperature.....50-60. * Max Humidity........55-65 percent valleys and 45-55 percent ridges. * 20-Foot Winds....... * Lower Elevation......Northwest 5-10 mph. * Ridge Top............West 5-15 mph becoming south 5-10 mph early in the morning. * LAL.................2. * CWR (> 0.10 Inch)...0 percent. .THURSDAY... * Sky/Weather.........Partly cloudy. Patchy smoke in the morning. Slight chance of rain showers and thunderstorms in the afternoon. * Max Temperature.....85-95 valleys and 78-88 ridges. * Min Humidity........16-26 percent valleys and 23-33 percent ridges. * 20-Foot Winds....... * Lower Elevation......Becoming upslope/upvalley 4-8 mph late in the afternoon. * Ridge Top............South 5-10 mph becoming west 5-15 mph in the afternoon. * Haines Index........5 moderate. * LAL.................2. * CWR (> 0.10 Inch)...0 percent. .FRIDAY...Not as warm. Mostly cloudy with chance of rain showers and thunderstorms. Lows 60-70. Highs 70-80. Southwest winds 10-15 mph. .SATURDAY...Mostly cloudy with chance of rain showers and thunderstorms. Lows 55-65. Highs 70-80. East winds 10-15 mph. .SUNDAY...Cooler. Mostly cloudy with rain showers and chance of thunderstorms. Lows 50-60. Highs 60-70. Southwest winds 10-15 mph. .MONDAY...Mostly cloudy. Chance of rain showers. Lows 45-55. Highs 65-75. .TUESDAY...Mostly clear. Lows 45-55. Highs 70-80. $$ MTZ107-081030- Salish and Kootenai Reservation- 416 AM MDT Wed Aug 7 2019 .TODAY... * Sky/Weather.........Mostly sunny. Patchy smoke. * Max Temperature.....95-100 valleys and 70-75 ridges. * Min Humidity........14-24 percent valleys and 20-30 percent ridges. * 20-Foot Winds....... * Lower Elevation......Becoming upslope/upvalley 4-8 mph late in the afternoon. * Ridge Top............South 5-10 mph becoming west 10-20 mph in the afternoon. * Haines Index........4 low. * LAL.................1. * CWR (> 0.10 Inch)...0 percent. .TONIGHT... * Sky/Weather.........Mostly clear. Patchy smoke. Slight chance of rain showers and thunderstorms after midnight. * Min Temperature.....55-65. * Max Humidity........44-54 percent. * 20-Foot Winds....... * Lower Elevation......Downslope/downvalley 2-5 mph. * Ridge Top............Northwest 10-20 mph decreasing to 5-10 mph late in the evening, then becoming south after midnight. * LAL.................2. * CWR (> 0.10 Inch)...0 percent. .THURSDAY... * Sky/Weather.........Partly cloudy. Patchy smoke in the morning. Slight chance of rain showers and thunderstorms in the afternoon. * Max Temperature.....90-95 valleys and 70-75 ridges. * Min Humidity........18-28 percent. * 20-Foot Winds....... * Lower Elevation......Becoming upslope/upvalley 4-8 mph early in the afternoon, then becoming variable less than 7 mph late in the afternoon. * Ridge Top............Southeast 5-10 mph becoming northwest 5-15 mph in the afternoon. * Haines Index........5 moderate. * LAL.................2. * CWR (> 0.10 Inch)...0 percent. .FRIDAY...Not as warm. Mostly cloudy with chance of rain showers and thunderstorms. Lows 60-70. Highs 75-85. Southwest winds 10-15 mph. .SATURDAY...Mostly cloudy with chance of rain showers and thunderstorms. Lows 55-65. Highs 75-85. East winds 10-15 mph. .SUNDAY...Cooler. Cloudy with rain showers and chance of thunderstorms. Lows 55-65. Highs 65-75. Southwest winds 10-15 mph. .MONDAY...Mostly cloudy. Chance of rain showers. Lows 50-60. Highs 70-80. .TUESDAY...Mostly clear. Lows 50-60. Highs 75-85. $$ MTZ109-081030- Bitterroot- 416 AM MDT Wed Aug 7 2019 .TODAY... * Sky/Weather.........Partly cloudy. and patchy smoke. Slight chance of rain showers and thunderstorms. * Max Temperature.....90-95 valleys and 75-80 ridges. * Min Humidity........13-23 percent valleys and 22-32 percent ridges. * 20-Foot Winds....... * Lower Elevation......Becoming upslope/upvalley 4-8 mph in the afternoon. * Ridge Top............South up to 5 mph becoming northwest 5-15 mph in the late morning and afternoon. * Haines Index........4 low. * LAL.................2. * CWR (> 0.10 Inch)...0 percent. .TONIGHT... * Sky/Weather.........Partly cloudy. Patchy smoke. Slight chance of rain showers and thunderstorms. * Min Temperature.....50-60. * Max Humidity........62-72 percent valleys and 51-61 percent ridges. * 20-Foot Winds....... * Lower Elevation......North 5-10 mph in the evening becoming downslope/downvalley 2-5 mph. * Ridge Top............North 5-15 mph becoming east 5-10 mph after midnight, then becoming south early in the morning. * LAL.................2. * CWR (> 0.10 Inch)...0 percent. .THURSDAY... * Sky/Weather.........Mostly cloudy. Patchy smoke in the morning. Rain showers likely and chance of thunderstorms. * Max Temperature.....85-90 valleys and 70-75 ridges. * Min Humidity........19-29 percent valleys and 28-38 percent ridges. * 20-Foot Winds....... * Lower Elevation......Variable less than 7 mph. * Ridge Top............South 5-10 mph becoming southwest 5-15 mph late in the afternoon. * Haines Index........4 low. * LAL.................4. * CWR (> 0.10 Inch)...30 percent. .FRIDAY...Not as warm. Mostly cloudy with chance of rain showers and thunderstorms. Lows 55-65. Highs 70-80. Southwest winds 10-15 mph. .SATURDAY...Mostly cloudy with rain showers and chance of thunderstorms. Lows 50-60. Highs 70-80. Southeast winds 10-15 mph. .SUNDAY...Cooler. Mostly cloudy with rain showers likely and chance of thunderstorms. Lows 50-60. Highs 60-70. Southwest winds 10-15 mph. .MONDAY...Partly cloudy. Chance of rain showers. Lows 45-55. Highs 65-75. .TUESDAY...Mostly clear. Lows 45-55. Highs 70-80. $$ MTZ110-111-081030- Deerlodge/West Beaverhead-East Beaverhead- 416 AM MDT Wed Aug 7 2019 .TODAY... * Sky/Weather.........Partly cloudy. Isolated thunderstorms in the afternoon. * Max Temperature.....85-90 valleys and 70-80 ridges. * Min Humidity........14-24 percent valleys and 20-30 percent ridges. * 20-Foot Winds....... * Lower Elevation......Variable less than 7 mph. * Ridge Top............Northwest 5-15 mph. * Haines Index........4 low. * LAL.................2. * CWR (> 0.10 Inch)...10 percent. .TONIGHT... * Sky/Weather.........Mostly cloudy then becoming partly cloudy overnight. Patchy smoke. Slight chance of rain showers and isolated thunderstorms. Slight chance of rain after midnight. * Min Temperature.....43-53 valleys and 50-55 ridges. * Max Humidity........69-79 percent valleys and 55-65 percent ridges. * 20-Foot Winds....... * Lower Elevation......North 5-10 mph becoming south in the late evening and overnight. * Ridge Top............Northwest 5-15 mph becoming south 5-10 mph after midnight. * LAL.................3. * CWR (> 0.10 Inch)...10 percent. .THURSDAY... * Sky/Weather.........Partly cloudy. Patchy smoke in the morning. Rain showers likely and chance of thunderstorms. * Max Temperature.....80-85 valleys and 68-78 ridges. * Min Humidity........26-36 percent valleys and 32-42 percent ridges. * 20-Foot Winds....... * Lower Elevation......Variable less than 7 mph. * Ridge Top............Southwest 10-20 mph. * Haines Index........4 low. * LAL.................4. * CWR (> 0.10 Inch)...30 percent. .FRIDAY...Mostly cloudy with thunderstorms likely and chance of rain showers. Lows 50-60. Highs 70-80. Southwest winds 10-20 mph. .SATURDAY...Mostly cloudy with slight chance of rain showers and thunderstorms. Lows 50-60. Highs 70-80. Southeast winds 15-25 mph. .SUNDAY...Mostly cloudy with chance of rain showers and thunderstorms. Lows 45-55. Highs 65-75. Southwest winds 20-30 mph. .MONDAY...Partly cloudy. Chance of rain showers and slight chance of thunderstorms. Lows 40-50. Highs 65-75. .TUESDAY...Mostly clear. Lows 45-55. Highs 70-80. $$