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Johnson City, Tennessee 7 Day Weather Forecast
Wx Forecast - Wx Discussion - Wx Aviation
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NWS Forecast for 2 Miles ENE Mountain Home TN
National Weather Service Forecast for:
2 Miles ENE Mountain Home TN
Issued by: National Weather Service Morristown, TN |
| Updated: 1:52 am EDT Jul 27, 2025 |
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Overnight
Mostly Cloudy
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Sunday
Patchy Fog
then Chance
T-storms
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Sunday
Night
Chance
T-storms then
Patchy Fog
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Monday
Chance
T-storms and
Patchy Fog
then T-storms
Likely
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Monday
Night
T-storms
Likely then
Chance
Showers and
Patchy Fog
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Tuesday
Chance
T-storms and
Dense Fog
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Tuesday
Night
Chance
T-storms then
Chance
Showers
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Wednesday
Chance
Showers then
Showers
Likely
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Wednesday
Night
Showers
Likely then
Chance
T-storms
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| Lo 73 °F |
Hi 91 °F |
Lo 72 °F |
Hi 91 °F |
Lo 71 °F |
Hi 94 °F |
Lo 71 °F |
Hi 95 °F |
Lo 70 °F |
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Hazardous Weather Outlook
Overnight
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Mostly cloudy, with a low around 73. Calm wind becoming southwest around 5 mph. |
Sunday
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A 40 percent chance of showers and thunderstorms, mainly after 2pm. Patchy fog between 7am and 8am. Otherwise, partly sunny and hot, with a high near 91. Heat index values as high as 96. Calm wind becoming west around 5 mph in the afternoon. |
Sunday Night
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A 30 percent chance of showers and thunderstorms, mainly before 8pm. Patchy fog after 5am. Otherwise, partly cloudy, with a low around 72. Calm wind. |
Monday
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A chance of showers and thunderstorms before 2pm, then showers likely and possibly a thunderstorm between 2pm and 5pm, then showers and thunderstorms likely after 5pm. Patchy fog before 7am. Otherwise, mostly sunny and hot, with a high near 91. Heat index values as high as 97. Calm wind becoming west around 5 mph in the afternoon. Chance of precipitation is 60%. |
Monday Night
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Showers and thunderstorms likely, mainly before 8pm. Patchy fog after 4am. Otherwise, partly cloudy, with a low around 71. Calm wind. Chance of precipitation is 60%. |
Tuesday
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A slight chance of showers, then a chance of showers and thunderstorms after 11am. Widespread dense fog, mainly before 7am. Otherwise, mostly sunny and hot, with a high near 94. Calm wind. Chance of precipitation is 40%. |
Tuesday Night
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A 30 percent chance of showers and thunderstorms before 2am. Partly cloudy, with a low around 71. Calm wind. |
Wednesday
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A chance of showers and thunderstorms between 8am and 2pm, then showers likely and possibly a thunderstorm after 2pm. Mostly sunny and hot, with a high near 95. Chance of precipitation is 60%. |
Wednesday Night
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Showers likely and possibly a thunderstorm before 8pm, then a chance of showers and thunderstorms between 8pm and 2am, then a slight chance of showers after 2am. Mostly cloudy, with a low around 70. Chance of precipitation is 60%. |
Thursday
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A slight chance of showers before 8am, then a chance of showers and thunderstorms between 8am and 2pm, then showers and possibly a thunderstorm after 2pm. High near 91. Chance of precipitation is 80%. |
Thursday Night
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Showers and possibly a thunderstorm. Low around 69. Chance of precipitation is 80%. |
Friday
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Showers likely and possibly a thunderstorm. Mostly cloudy, with a high near 85. Chance of precipitation is 70%. |
Friday Night
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A 50 percent chance of showers and thunderstorms. Mostly cloudy, with a low around 66. |
Saturday
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A 50 percent chance of showers and thunderstorms. Partly sunny, with a high near 80. |
Forecast from NOAA-NWS
for 2 Miles ENE Mountain Home TN.
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Weather Forecast Discussion
545
FXUS64 KMRX 270527
AFDMRX
Area Forecast Discussion
National Weather Service Morristown TN
127 AM EDT Sun Jul 27 2025
...New SHORT TERM, LONG TERM, AVIATION...
.SHORT TERM...
(Today and tonight)
Issued at 120 AM EDT Sun Jul 27 2025
Key Messages:
1. Heat Indices from around 100F to the lower 100s expected across
the central and southern east TN valley.
2. Isolated showers and storms.
Discussion:
Same story different day. Another day of hot and humid conditions
across the forecast area as the upper ridge continues to dominate,
while slowly retrograding westward. With a strong upper high and
gulf moisture in place, Heat Indices will range from near 100F to
the lower 100s across the central and southern TN valley. Isolated
showers and storms expected through the period, with highest chances
during peak heating and focused along the high terrain areas. The
main concern with showers or storms will be heavy downpours as PW
values remain in the upper quadrant of climatological norms.
The main concern throughout the short term is the heat and humidity
which will pose a health risk. Those spending time or working
outdoors are encouraged to remain hydrated, take frequent breaks in
shade or air conditioning, and plan to work during the cooler hours
of the day in the morning and late evening. Remember that heat index
values are calculated in the shade, they don`t account for direct
sunlight. Urban, paved areas also retain additional heat and can
often be much warmer than official temperature measurements. Heat
related illness and deaths are preventable; take precautions to
mitigate the risk to you and your loved ones.
&&
.LONG TERM...
(Monday through Saturday)
Issued at 120 AM EDT Sun Jul 27 2025
Key Messages:
1. Monday through Wednesday: Hot with diurnal convection expected,
best chances on Monday. Approaching Heat Advisory criteria each day.
2. Increasing chances for scattered convection midweek through the
end of the week as ridging weakens slightly and a front shifts
southward to our area.
Discussion:
For Monday, the NBM continues to advertise high-end chance and low-
end likely POPs from the central valley and northward. This is due
to northwest flow and associated impulses moving down into our area.
Northwest flow is due to the high to our southwest. These POPs may
end up being to high but not confident enough to make any changes
so will let them ride. A return to more isolated and scattered storm
chances Tuesday through Wednesday. Heat Indices will will approach
criteria each of these days. Advisory products may be needed as we
get closer in time.
Wednesday onward, models still showing a flattening ridge due to a
weak cold front moving down from the north. Therefore, highest POPs
of the period are in place on Thursday and Friday. "Cooler" weather
expected Friday and Saturday with highs in the mid to upper 80s by
Saturday.
Daily Record High Maximum Temperatures
Date Chattanooga Knoxville Tri-Cities Oak Ridge
07-27 104(1952) 103(1952) 99(1952) 102(1952)
07-28 106(1952) 103(1952) 102(1952) 105(1952)
07-29 105(1952) 101(1952) 102(1952) 103(1952)
07-30 99(1999) 98(1995) 96(1995) 100(1995)
07-31 99(1999) 99(1915) 95(1995) 100(1995)
08-01 99(2010) 97(1935) 95(1953) 97(1954)
08-02 100(2011) 97(2011) 96(2006) 96(2011)
&&
.AVIATION...
(06Z TAFS)
Issued at 120 AM EDT Sun Jul 27 2025
VFR can generally be expected with W to SWly winds Sunday
afternoon. TRI poses the best chance of experiencing a stray
shower or storm during the PM hours, so the inherited PROB30
remains. Like 24 hours ago, there is extensive cloud cover and
dissipating storms E and SE of TRI. Majority of the precipitation
should remain on the North Carolina side.
&&
.PRELIMINARY POINT TEMPS/POPS...
Chattanooga Airport, TN 95 76 96 77 / 30 10 40 0
Knoxville McGhee Tyson Airport, TN 94 76 95 75 / 30 20 40 10
Oak Ridge, TN 94 75 94 75 / 30 10 50 10
Tri Cities Airport, TN 90 72 90 71 / 40 30 50 20
&&
.MRX WATCHES/WARNINGS/ADVISORIES...
NC...NONE.
TN...NONE.
VA...NONE.
&&
$$
AVIATION...KS
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