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Hazelwood, Missouri 7 Day Weather Forecast
Wx Forecast - Wx Discussion - Wx Aviation
NWS Forecast for 2 Miles WNW Hazelwood MO
National Weather Service Forecast for: 2 Miles WNW Hazelwood MO
Issued by: National Weather Service Saint Louis, MO
Updated: 11:07 am CST Jan 31, 2025
 
This
Afternoon
This Afternoon: A 30 percent chance of showers, mainly after 3pm.  Cloudy, with a high near 54. West wind 10 to 13 mph, with gusts as high as 21 mph.
Chance
Showers
Tonight

Tonight: A 20 percent chance of showers before 7pm.  Cloudy, then gradually becoming partly cloudy, with a low around 33. Northwest wind 5 to 11 mph becoming northeast after midnight. Winds could gust as high as 21 mph.
Slight Chance
Showers then
Mostly Cloudy
Saturday

Saturday: Partly sunny, with a high near 48. Northeast wind 5 to 11 mph becoming southeast in the afternoon. Winds could gust as high as 20 mph.
Partly Sunny

Saturday
Night
Saturday Night: Cloudy, with a low around 42. South wind 8 to 13 mph, with gusts as high as 23 mph.
Cloudy

Sunday

Sunday: Partly sunny, with a high near 63. Southwest wind 7 to 10 mph.
Partly Sunny

Sunday
Night
Sunday Night: Mostly cloudy, with a low around 41.
Mostly Cloudy

Monday

Monday: Partly sunny, with a high near 59.
Partly Sunny

Monday
Night
Monday Night: Partly cloudy, with a low around 35.
Partly Cloudy

Tuesday

Tuesday: Partly sunny, with a high near 48.
Partly Sunny

Hi 54 °F Lo 33 °F Hi 48 °F Lo 42 °F Hi 63 °F Lo 41 °F Hi 59 °F Lo 35 °F Hi 48 °F

Hazardous Weather Outlook
 

This Afternoon
 
A 30 percent chance of showers, mainly after 3pm. Cloudy, with a high near 54. West wind 10 to 13 mph, with gusts as high as 21 mph.
Tonight
 
A 20 percent chance of showers before 7pm. Cloudy, then gradually becoming partly cloudy, with a low around 33. Northwest wind 5 to 11 mph becoming northeast after midnight. Winds could gust as high as 21 mph.
Saturday
 
Partly sunny, with a high near 48. Northeast wind 5 to 11 mph becoming southeast in the afternoon. Winds could gust as high as 20 mph.
Saturday Night
 
Cloudy, with a low around 42. South wind 8 to 13 mph, with gusts as high as 23 mph.
Sunday
 
Partly sunny, with a high near 63. Southwest wind 7 to 10 mph.
Sunday Night
 
Mostly cloudy, with a low around 41.
Monday
 
Partly sunny, with a high near 59.
Monday Night
 
Partly cloudy, with a low around 35.
Tuesday
 
Partly sunny, with a high near 48.
Tuesday Night
 
A 20 percent chance of rain after midnight. Cloudy, with a low around 42.
Wednesday
 
A 40 percent chance of rain. Mostly cloudy, with a high near 57.
Wednesday Night
 
Rain likely and possibly a thunderstorm. Mostly cloudy, with a low around 43. Chance of precipitation is 60%.
Thursday
 
A 40 percent chance of rain. Partly sunny, with a high near 54.

 

Forecast from NOAA-NWS for 2 Miles WNW Hazelwood MO.

Weather Forecast Discussion
639
FXUS63 KLSX 311750
AFDLSX

Area Forecast Discussion...Updated Aviation
National Weather Service Saint Louis MO
1150 AM CST Fri Jan 31 2025

.KEY MESSAGES...

- Patchy dense fog may linger through the morning, but
  visibilities are expected to gradually improve. Some light
  showers are likely through the day.

- Dry, mild conditions are expected through the weekend, with well
  above normal temperatures expected Sunday.

- The weather turns cooler next week, though how much cooler is
  still very uncertain.

- Confidence is growing that precipitation will return near the
  middle of next week.


&&

.SHORT TERM... (Through Saturday Morning)
Issued at 349 AM CST Fri Jan 31 2025

In the immediate term, the primary forecast challenge continues to
be the persistence of widespread fog throughout the region, along
with another round of light to moderate rain across parts of
northeast Missouri and west-central Illinois.

At the present time, a low pressure system is in the process of
moving slowly northeast through the northern half of Missouri. In
the vicinity of the low, light winds, high humidity, and cold ground
temperatures have led to widespread fog development, with some bouts
of drizzle also ongoing. While widespread dense fog was observed
during the late evening yesterday with visibilities as low as 1/8
mile observed, there has been some modest improvement in many areas
during the very early morning hours. This improvement is most
pronounced across central/southeast Missouri so far, where a dry
slot and southwesterly surface winds are helping to erode the fog.
Visibilities are expected to gradually improve through the
morning from southwest to northeast as this dry slot expands. As
such, parts of the Dense Fog Advisory will likely be cancelled
early once it becomes clear that visibilities have improved for
good.

Meanwhile, a broad shield of mostly stratiform rain has developed
across northwest Missouri and northeast Kansas, associated with a
deformation zone along the northwest flank of the surface low. As
this band of rain slowly moves northeastward, a belt of roughly 1
to 2 inches of rain may lead to localized flooding issues across
parts of far northern Missouri, exacerbated by frozen soils in
those areas. This heavier rain is not likely to spread into our
forecast area of responsibility and local impacts are not
expected, but our northern fringes may see another round of
soaking rain through the morning hours. A Flood Watch has also
been issued just to our north (including Scotland/Clark counties
in Missouri), but we do not currently expect noteworthy local
flooding impacts farther south.

Through the day today a cold front will push south through the
area, bringing a modest cooldown and one more round of mostly
light showers. While we don`t expect significant precipitation
amounts, this will likely keep gloomy conditions in place through
the day in most areas. There are also hints of modest instability
developing in model sounding profiles, but probabilities of more
than 100 J/kg remain very low locally (20% or less). As such, the
potential for any thunderstorm activity remains very low for
today. Meanwhile, temperatures are expected to be quite variable
due to the combination of the cold front passage and persistent
cloud cover. Areas that remain south of the cold front will likely
see southwest winds through the afternoon and likewise may once
again warm well into the 50s to near 60, while areas behind the
front struggle into the 40s with northwesterly surface winds.

Overnight tonight through Saturday morning, winds are expected to
weaken quickly behind the front as high pressure settles into the
area. As such, we will need to keep an eye on the potential for
another round of fog, particularly across the Ozarks there there is
a more consistent signal in high resolution model guidance. However,
tonight`s fog setup is a bit different than the one that led to this
morning`s fog, and confidence is lower overall regarding the
potential coverage and density of this second round.

BRC

&&

.LONG TERM...  (Saturday Night through Thursday)
Issued at 349 AM CST Fri Jan 31 2025

By Saturday, zonal flow aloft is expected to develop across much of
the CONUS, and this is expected to persist through the middle of the
week. Meanwhile, persistent pressure falls across the central plains
will gradually re-establish southerly surface flow across the
Mississippi Valley, beginning from the southeast Saturday and
gradually veering to the southwest by Sunday. This will result in a
gradual warming trend over the weekend, particularly Sunday when
temperatures are likely to climb back into the 60s almost area-wide,
supported by narrow NBM/LREF ensemble temperature spreads.
Meanwhile, precipitation chances remain very low over the weekend,
although we may be struggle to emerge from cloud cover on Saturday.

From Monday onward, confidence in the day-to-day forecast details
begins to decrease due to a number of factors. While zonal flow
aloft is expected to persist, a passing shortwave near the US/Canada
border is expected to drive a cold front south and into our area,
where it will likely stall. Exactly where this boundary settles will
play a big role in our realized temperatures, and there remains
quite a bit of forecast variability among ensemble members regarding
exactly how far south it`ll reach. Due to there being a relatively
sharp temperature gradient along this front, forecast temperature
spreads are quite high (25th-75th percentile spreads of 10+
degrees), and this reduces confidence in our deterministic forecast
values. Still, the potential for precipitation remains low Monday
through much of the day Tuesday.

Beginning sometime late Tuesday through Wednesday, the upper flow
pattern is expected to gradually amplify as a broad trough digs into
the western CONUS, and potentially phases with another trough
digging into the Canadian Shield. This is likely to spread deep and
robust southwesterly flow aloft across much of the central CONUS and
Mississippi Valley, and transport deeper moisture into the area from
the south. In fact, all of the major ensemble suites
(NAEFS/GEFS/ECMWF) produce widespread ensemble mean PWAT values
exceeding the 90th percentile by Wednesday. Meanwhile, a cold front
remains likely to push through the area at some point mid-week,
although there remains considerable variability in timing. Between
the passing boundary and rich pre-frontal moisture in place,
confidence is increasing that we will see the return of
precipitation between late Tuesday and sometime Thursday, although
there remains very little confidence in potential timing and
amounts. Much of this uncertainty is once again wrapped up in the
timing of the cold front, and this also extends to forecast
temperatures. NBM/LREF forecast temperature spreads increase even
more during this period, with 25th-75th percentile spreads of 15-25
degrees Tuesday and Wednesday.

Beyond just the potential for precipitation, there is also a growing
signal for at least some modest instability to develop in the warm
sector, supporting at least a slight chance for thunderstorms
Wednesday through Thursday. Given the strong dynamics expected this
will need to be monitored closely, although confidence remains low
in the potential for strong/severe thunderstorms at this time.
Meanwhile, it does appear much more likely than not that the
majority of this precipitation will fall as rain, but the
considerable uncertainty in forecast temperatures does leave open a
bit of wiggle room for frozen precipitation types behind the passing
cold front.

BRC

&&

.AVIATION...  (For the 18z TAFs through 18z Saturday Afternoon)
Issued at 1149 AM CST Fri Jan 31 2025

MVFR to IFR ceilings will continue to blanket most of the region
through this evening, with IFR ceilings most prevalent at KUIN and
KCOU. A band of light showers/drizzle is expected to shift
southeastward through northeastern, central MO and west-central IL
this afternoon reducing visibilities at times, but precipitation
will likely either dissipate or become light enough to preclude
impacts at St. Louis metro terminals this evening.

Scattering/clearing of stratus will take place this evening from
north to south with flight conditions likely improving to VFR at all
terminals, although stratus may linger overnight across southeastern
MO/southwestern IL. Patchy fog is possible early Saturday morning,
with the greatest chance at KJEF where a TEMPO group has been
included. The coverage/continuity of MVFR stratus returning
northward on Saturday is not yet clear, with prevailing VFR flight
conditions seeming the most likely scenario at this point.

Pfahler

&&

.LSX WATCHES/WARNINGS/ADVISORIES...
MO...None.
IL...None.
&&

$$

WFO LSX
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Forecast Discussion from: NOAA-NWS Script developed by: El Dorado Weather






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