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Mount Lebanon, Pennsylvania 7 Day Weather Forecast
Wx Forecast - Wx Discussion - Wx Aviation
NWS Forecast for Mount Lebanon PA
National Weather Service Forecast for: Mount Lebanon PA
Issued by: National Weather Service Pittsburgh, PA
Updated: 12:21 am EDT Mar 31, 2025
 
Overnight

Overnight: A chance of showers and thunderstorms before 1am, then showers and possibly a thunderstorm between 1am and 5am, then a chance of showers and thunderstorms after 5am. Some of the storms could be severe.  Low around 58. Southwest wind around 14 mph, with gusts as high as 25 mph.  Chance of precipitation is 90%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.
Severe
T-Storms
Monday

Monday: Showers and thunderstorms likely, mainly before 2pm.  Mostly cloudy, with a high near 63. West wind around 14 mph, with gusts as high as 24 mph.  Chance of precipitation is 70%. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.
Showers
Likely
Monday
Night
Monday Night: Mostly cloudy, with a low around 32. Northwest wind 10 to 14 mph.
Mostly Cloudy
Tuesday

Tuesday: Mostly sunny, with a high near 51. Northwest wind 7 to 9 mph.
Mostly Sunny
Tuesday
Night
Tuesday Night: Partly cloudy, with a low around 39. North wind 5 to 9 mph becoming east after midnight.
Partly Cloudy
Wednesday

Wednesday: Showers likely, with thunderstorms also possible after 5pm.  Mostly cloudy, with a high near 68. Chance of precipitation is 60%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.
Showers
Likely
Wednesday
Night
Wednesday Night: Showers likely, mainly after 2am.  Mostly cloudy, with a low around 60. Chance of precipitation is 70%.
Showers
Likely
Thursday

Thursday: Showers.  High near 72. Chance of precipitation is 80%.
Showers
Thursday
Night
Thursday Night: Showers.  Low around 54. Chance of precipitation is 90%.
Showers
Lo 58 °F Hi 63 °F Lo 32 °F Hi 51 °F Lo 39 °F Hi 68 °F Lo 60 °F Hi 72 °F Lo 54 °F

Hazardous Weather Outlook
Severe Thunderstorm Watch
 

Overnight
 
A chance of showers and thunderstorms before 1am, then showers and possibly a thunderstorm between 1am and 5am, then a chance of showers and thunderstorms after 5am. Some of the storms could be severe. Low around 58. Southwest wind around 14 mph, with gusts as high as 25 mph. Chance of precipitation is 90%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.
Monday
 
Showers and thunderstorms likely, mainly before 2pm. Mostly cloudy, with a high near 63. West wind around 14 mph, with gusts as high as 24 mph. Chance of precipitation is 70%. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.
Monday Night
 
Mostly cloudy, with a low around 32. Northwest wind 10 to 14 mph.
Tuesday
 
Mostly sunny, with a high near 51. Northwest wind 7 to 9 mph.
Tuesday Night
 
Partly cloudy, with a low around 39. North wind 5 to 9 mph becoming east after midnight.
Wednesday
 
Showers likely, with thunderstorms also possible after 5pm. Mostly cloudy, with a high near 68. Chance of precipitation is 60%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.
Wednesday Night
 
Showers likely, mainly after 2am. Mostly cloudy, with a low around 60. Chance of precipitation is 70%.
Thursday
 
Showers. High near 72. Chance of precipitation is 80%.
Thursday Night
 
Showers. Low around 54. Chance of precipitation is 90%.
Friday
 
A chance of showers before 2pm. Mostly cloudy, with a high near 64. Chance of precipitation is 50%.
Friday Night
 
Showers likely. Mostly cloudy, with a low around 49. Chance of precipitation is 70%.
Saturday
 
Showers. High near 62. Chance of precipitation is 80%.
Saturday Night
 
Showers likely. Mostly cloudy, with a low around 49. Chance of precipitation is 70%.
Sunday
 
Showers likely. Mostly cloudy, with a high near 62. Chance of precipitation is 60%.

 

Forecast from NOAA-NWS for Mount Lebanon PA.

Weather Forecast Discussion
595
FXUS61 KPBZ 310427 AAA
AFDPBZ

Area Forecast Discussion...UPDATED
National Weather Service Pittsburgh PA
1227 AM EDT Mon Mar 31 2025

.SYNOPSIS...
Above normal temperatures continue with severe thunderstorms
possible tonight into early Monday. A brief bit of drier and
cooler weather is expected Tuesday. Heavy rainfall is expected
across the Ohio River Valley late week.

&&

.NEAR TERM /UNTIL 6 AM THIS MORNING/...
KEY MESSAGES:

- Line of showers and storms tonight into early Monday with a
  few possibly severe
-------------------------------------------------------------------

A line of showers and thunderstorms continue to track across the
area overnight. Recent satellite images show cloud tops warming
with this convection, with a gradual weakening trend. There is
still shear in place, though recent mesoanalysis shows this is
beginning to diminish across the Upper Ohio Valley region.
Cancelled the Severe Thunderstorm Watch west of where the
current line is, as the severe potential has ended. Will monitor
trends over the next couple of hours for futher adjustments.

&&

.SHORT TERM /6 AM THIS MORNING THROUGH 6 PM TUESDAY/...
KEY MESSAGES:

- Cold front expected to cross the region slowly on Monday
-------------------------------------------------------------------

By 6am Monday morning, showers and storm will likely still be
advancing through the region. The cold front may be positioned
over central Ohio, a noted delay due to the upper-level wind
field running parallel along the front.

If the front progressives faster, this could set up a favorable
time window for much of our region to avoid the brunt of any
severe weather early on Monday. Model consensus is very strong
in showing most of the destabilization Monday well east of the
ridges towards the I-81 corridor. This leaves a non-zero but low
chance that impactful severe storms can fire along the front
bright and early Monday morning as the front crosses the
remainder of our region. Confidence is high that by 6pm the
front will be at least passed counties northwest and west
of Allegheny County (Mercer/Venango/Lawrence/Columbiana).

Temperatures will remain well above normal Monday after within
the warm sector.

&&

.LONG TERM /TUESDAY NIGHT THROUGH SUNDAY/...
KEY MESSAGES:

- A cool-down is most likely Monday night into Tuesday.
- Above average temperatures Wednesday through Friday.
- Potential for heavy rain Thursday into Saturday
-------------------------------------------------------------------

Dry and cooler conditions settle in Tuesday behind the cold
front. Both are rather short-lived as another system climbs
through the Upper Midwest on Wednesday dragging a warm front
back through the region. This ushers in the return of above
normal temperatures and rainfall.

There looks to be potential for a boundary to stall across the
Ohio Valley beginning late-week and lasting into the weekend.
The exact placement and any further wobbling of this stationary
boundary will be very important to the expected impacts but it
looks likely that somewhere in the OH Valley is in for rounds of
rainfall and the possibility of high water impacts. It remains
very early to say exactly where these impacts will be greatest
but clustered analysis. Long-range ensembles yield several days
next week where the chance to see >1 inch of rainfall in 24hrs
is above 30% in our region. There is also a noted 50% chance of
some rivers reaching `Action` stage, including downtown
Pittsburgh.

&&

.AVIATION /06Z MONDAY THROUGH FRIDAY/...
First area of showers and thunderstorms will move through all
ports early in the forecast period. This will bring tempo
restrictions to vis/cigs. MVFR cigs are generally favored
through the rest of the forecast period. Another round of
scattered showers are possible during the morning and early
afternoon hours with the passage of the cold front. Showers look
to be non-restrictive.

Wind gusts should strengthen during the morning hours, with
gusts of 20 to 25 mph possible. Winds will be backing rapidly
once the cold front crosses, so a switch from southwest to
northwest should be expected.

Outlook...
VFR returns Tuesday under high pressure. Low pressure may bring
another round of rain and restrictions Wednesday into Thursday
with an unsettled pattern continuing to close out the week.

&&

.PBZ WATCHES/WARNINGS/ADVISORIES...
PA...None.
OH...None.
WV...None.

&&

$$

SYNOPSIS...Hefferan/MLB
NEAR TERM...WM
SHORT TERM...88/AK
LONG TERM...88/AK
AVIATION...22/MLB
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Forecast Discussion from: NOAA-NWS Script developed by: El Dorado Weather






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