Alton, Illinois Weather Conditions

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Current Conditions

  • 37°
  • Overcast
  • Wind: West 17 mph
  • Humidity: 74%
  • Visibility: 10.0 miles
  • Dew Point: 29°
  • Pressure: 29.81 in. 0
  • Heat Index: 27

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Next 12 Hours

2  am
5  am
8  am
11  am
2  pm
Overcast
Overcast
Snow Showers
Snow Showers
Snow Showers
Snow Showers
Snow Showers
Snow Showers
Partly Cloudy
Partly Cloudy
32°
31°
26°
29°
28°
Forecast data from the National Digital Forecast Database.

5 Day Forecast

  • Monday
  • Snow Showers
  • High: 29 °
  • Low: 14 °
  • Snow Showers
  • Tuesday
  • Overcast
  • High: 22 °
  • Low: 10 °
  • Overcast
  • Wednesday
  • Partly Cloudy
  • High: 23 °
  • Low: 12 °
  • Partly Cloudy
  • Thursday
  • Partly Cloudy
  • High: 31 °
  • Low: 18 °
  • Partly Cloudy
  • Friday
  • Partly Cloudy
  • High: 35 °
  • Low: 21 °
  • Partly Cloudy

Forecast for Alton, Illinois

Updated: 10:00 PM CST on January 07, 2016

  • Monday

    Windy with on and off snow showers during the morning. High 29F. Winds WNW at 20 to 30 mph. Chance of snow 50%. Winds could occasionally gust over 40 mph.

  • Monday Night

    Cloudy skies. Windy in the evening. A few flurries or snow showers possible. Low 14F. Winds NW at 20 to 30 mph.

  • Tuesday

    Cloudy. High 22F. Winds NW at 15 to 25 mph.

  • Tuesday Night

    Mostly clear skies in the evening then becoming cloudy overnight. Low around 10F. Winds NW at 10 to 20 mph.

  • Wednesday

    Cloudy skies early, followed by partial clearing. High 23F. Winds NW at 10 to 20 mph.

  • Wednesday Night

    A few clouds from time to time. A few flurries or snow showers possible. Low 12F. Winds N at 5 to 10 mph.

  • Thursday

    Partly cloudy skies. High 31F. Winds NE at 5 to 10 mph.

  • Thursday Night

    A few clouds. Low 18F. Winds light and variable.

  • Friday

    Partly cloudy skies in the morning will give way to cloudy skies during the afternoon. High near 35F. Winds WSW at 5 to 10 mph.

  • Friday Night

    Partly cloudy skies. Low 21F. Winds N at 5 to 10 mph.

  • Saturday

    Sunny. High 28F. Winds NNE at 10 to 15 mph.

  • Saturday Night

    Partly cloudy. Low 16F. Winds ENE at 5 to 10 mph.

  • Sunday

    Partly cloudy in the morning followed by periods of snow showers later in the day. High 32F. Winds SE at 10 to 20 mph. Chance of snow 50%. 1 to 3 inches of snow expected.

  • Sunday Night

    Occasional snow showers. Low 24F. Winds SSE at 10 to 15 mph. Chance of snow 50%. About one inch of snow expected.

  • Monday

    Cloudy skies early, then partly cloudy in the afternoon. High 37F. Winds WSW at 10 to 15 mph.

  • Monday Night

    Mostly clear skies. Low 27F. Winds W at 5 to 10 mph.

  • Tuesday

    A few clouds from time to time. High 43F. Winds W at 5 to 10 mph.

  • Tuesday Night

    Mostly clear skies. Low 29F. Winds light and variable.

  • Wednesday

    Sunshine and clouds mixed. High 44F. Winds W at 5 to 10 mph.

  • Wednesday Night

    Partly cloudy during the evening. A few snow showers developing later during the night. Low 28F. Winds light and variable. Chance of snow 30%.

Personal Weather Stations

Personal Weather Stations [Add your weather station!]

Location: Alton Amtrak, Alton, IL

Updated: 1:46 AM CST

Temperature: 36.3 °F Dew Point: 29 °F Humidity: 75% Wind: SE at 5.4 mph Pressure: 29.78 in Hourly Precipitation: 0.00 in Windchill: 32 °F Graphs

Location: Alton - Beacon, Alton, IL

Updated: 1:46 AM CST

Temperature: 37.0 °F Dew Point: 33 °F Humidity: 85% Wind: WSW at 2.0 mph Pressure: 29.81 in Hourly Precipitation: 0.00 in Windchill: 37 °F Graphs

Location: Alton - Christian Hill Area, Alton, IL

Updated: 1:45 AM CST

Temperature: 35.6 °F Dew Point: 32 °F Humidity: 87% Wind: NNW at 6.0 mph Pressure: 29.79 in Hourly Precipitation: 0.00 in Windchill: 31 °F Graphs

Location: Milton Road, Alton, IL

Updated: 1:45 AM CST

Temperature: 36.0 °F Dew Point: 30 °F Humidity: 80% Wind: West at 6.2 mph Pressure: 29.79 in Hourly Precipitation: 0.00 in Windchill: 31 °F Graphs

Location: Alton - Richland Woods, Alton, IL

Updated: 1:46 AM CST

Temperature: 36.5 °F Dew Point: 32 °F Humidity: 83% Wind: SW at 3.0 mph Pressure: 29.82 in Hourly Precipitation: 0.00 in Windchill: 36 °F Graphs

Location: Milton Area - Oscar, Alton, IL

Updated: 1:40 AM CST

Temperature: 37.4 °F Dew Point: 32 °F Humidity: 82% Wind: NW at 4.0 mph Pressure: 29.78 in Hourly Precipitation: 0.00 in Windchill: 34 °F Graphs

Location: Brecht Ln, Godfrey, IL

Updated: 1:40 AM CST

Temperature: 35.1 °F Dew Point: 31 °F Humidity: 85% Wind: Calm Pressure: 29.66 in Hourly Precipitation: - Windchill: 35 °F Graphs

Location: Godfrey River Aire Subdivision, Godfrey, IL

Updated: 1:46 AM CST

Temperature: 35.2 °F Dew Point: 31 °F Humidity: 84% Wind: Calm Pressure: 29.78 in Hourly Precipitation: 0.00 in Windchill: 35 °F Graphs

Location: Rosewood Heights, East Alton, IL

Updated: 1:46 AM CST

Temperature: 37.5 °F Dew Point: 29 °F Humidity: 72% Wind: WNW at 2.0 mph Pressure: 29.78 in Hourly Precipitation: 0.00 in Windchill: 38 °F Graphs

Location: Wood River (East End), Wood River, IL

Updated: 1:43 AM CST

Temperature: 37.2 °F Dew Point: 31 °F Humidity: 78% Wind: West at 4.2 mph Pressure: 29.76 in Hourly Precipitation: - Windchill: 34 °F Graphs

Location: Whispering Oaks Drive, Bethalto, IL

Updated: 1:45 AM CST

Temperature: 39.2 °F Dew Point: 28 °F Humidity: 63% Wind: North at - Pressure: 29.91 in Hourly Precipitation: - Windchill: 39 °F Graphs

Location: The Landing at Old Jamestown, Florissant, MO

Updated: 1:46 AM CST

Temperature: 37.6 °F Dew Point: 29 °F Humidity: 70% Wind: SSW at 2.0 mph Pressure: 29.41 in Hourly Precipitation: 0.00 in Windchill: 38 °F Graphs

Location: Jersey County along IL 111, Brighton, IL

Updated: 1:46 AM CST

Temperature: 36.1 °F Dew Point: 30 °F Humidity: 77% Wind: Calm Pressure: 29.50 in Hourly Precipitation: 0.00 in Windchill: 36 °F Graphs

Location: Riverside at Albers Pointe, Florissant, MO

Updated: 1:46 AM CST

Temperature: 35.8 °F Dew Point: 31 °F Humidity: 81% Wind: WSW at 2.0 mph Pressure: 29.79 in Hourly Precipitation: 0.00 in Windchill: 36 °F Graphs

Location: Fox Lake Meadows, Florissant, MO

Updated: 1:34 AM CST

Temperature: 36.3 °F Dew Point: 30 °F Humidity: 76% Wind: WNW at 12.5 mph Pressure: 29.77 in Hourly Precipitation: - Windchill: 28 °F Graphs

Location: Jost Farm, Florissant, MO

Updated: 1:45 AM CST

Temperature: 36.7 °F Dew Point: 24 °F Humidity: 59% Wind: West at 6.9 mph Pressure: 30.05 in Hourly Precipitation: 0.00 in Windchill: 31 °F Graphs

Location: Grand Ave, Edwardsville, IL

Updated: 1:46 AM CST

Temperature: 38.3 °F Dew Point: 33 °F Humidity: 81% Wind: Calm Pressure: 29.53 in Hourly Precipitation: 0.00 in Windchill: 38 °F Graphs

Location: Southland Estates, Jerseyville, IL

Updated: 1:46 AM CST

Temperature: 35.8 °F Dew Point: 28 °F Humidity: 72% Wind: WNW at 10.7 mph Pressure: 29.63 in Hourly Precipitation: 0.00 in Windchill: 28 °F Graphs

Location: Riverwood Place, Florissant, MO

Updated: 1:46 AM CST

Temperature: 36.3 °F Dew Point: 28 °F Humidity: 73% Wind: North at 1.0 mph Pressure: 29.84 in Hourly Precipitation: 0.00 in Windchill: 36 °F Graphs

Location: 27th Street, Granite City, IL

Updated: 1:45 AM CST

Temperature: 44.6 °F Dew Point: 31 °F Humidity: 59% Wind: North at - Pressure: 29.88 in Hourly Precipitation: 0.00 in Windchill: 45 °F Graphs

Location: Steven Drive, Bunker Hill, IL

Updated: 1:45 AM CST

Temperature: 36.0 °F Dew Point: 30 °F Humidity: 78% Wind: North at - Pressure: 29.08 in Hourly Precipitation: - Windchill: 36 °F Graphs

Location: Nickel Plate Trail, Edwardsville, IL

Updated: 1:45 AM CST

Temperature: 38.5 °F Dew Point: 31 °F Humidity: 75% Wind: West at 5.0 mph Pressure: 29.80 in Hourly Precipitation: 0.00 in Windchill: 35 °F Graphs

Location: EAST GRANITE, Granite City, IL

Updated: 1:33 AM CST

Temperature: 38.3 °F Dew Point: 32 °F Humidity: 78% Wind: NW at 7.8 mph Pressure: 29.78 in Hourly Precipitation: - Windchill: 33 °F Graphs

Location: Dunlap Lake, Edwardsville, IL

Updated: 1:40 AM CST

Temperature: 38.6 °F Dew Point: 31 °F Humidity: 74% Wind: SSW at 8.0 mph Pressure: 29.80 in Hourly Precipitation: 0.00 in Windchill: 33 °F Graphs

Location: Duke St, Edwardsville, IL

Updated: 1:46 AM CST

Temperature: 38.7 °F Dew Point: 30 °F Humidity: 71% Wind: West at 7.6 mph Pressure: 30.06 in Hourly Precipitation: 0.00 in Windchill: 33 °F Graphs

Location: Lake of Dreams, Jerseyville, IL

Updated: 1:23 AM CST

Temperature: 36.0 °F Dew Point: 30 °F Humidity: 78% Wind: West at 12.5 mph Pressure: 29.66 in Hourly Precipitation: - Windchill: 28 °F Graphs

Location: Roland Boulevard, Saint Louis, MO

Updated: 1:46 AM CST

Temperature: 41.4 °F Dew Point: 31 °F Humidity: 67% Wind: North at - Pressure: 29.67 in Hourly Precipitation: 0.00 in Windchill: 41 °F Graphs

MSN Maps of:

Temp: Dew Point: Humidity Wind Pressure Hr Precip -

NWS Forecaster Discussion




Area forecast discussion...updated aviation 
National Weather Service St Louis MO 
1141 PM CST sun Feb 7 2016 


Update: 
issued at 936 PM CST sun Feb 7 2016 


Isolated-scattered very light rain showers and sprinkles have 
affected portions of the area this evening. Looking 
upstream...radar imagery shows streaks of snow across the mid- 
Missouri Valley. This activity is expected to move south and east 
into our region overnight tonight. Some uptick in the intensity 
still seems probable with some of the snow showers briefly 
reducing visibilities very late tonight/early Monday morning. 
Pinpointing where and when is still futile even at this range...so 
maintained high chance pops beginning late tonight and lasting 
into Monday. 


Gosselin 


&& 


Short term: (through Monday afternoon) 
issued at 320 PM CST sun Feb 7 2016 


Between a passage of the initial cold front thru the region by early 
this afternoon and/or thickening cloud cover, temps have largely 
already hit their daily maxes and will either stagnate or slowly 
begin to fall, after having resulted in another mild day, with Max 
temps in the upper 40s to mid 50s. 


A strengthening upper low over The Arrowhead region of Minnesota will 
help govern the tracks of various disturbances around it over the 
next couple of days as it digs the flow to be more from the N-NW. 


The first few disturbances are starting to come into focus now 
and we can, with some degree of confidence, focus on the tracks and 
timing. The first is over northwest MO and is helping to kick off 
some pcpn echo over the MO-Iowa border just downstream from it. This 
is liquid pcpn. This disturbance will essentially drop straight 
southward, with some east movement, and should help to perhaps kick 
off light rain or sprinkles this evening for parts of central and 
southeast MO, and perhaps into far southern Illinois. The pcpn-type is 
expected to remain liquid with temps still in the 40s for most areas 
during this time. 


The second disturbance is located near Sioux Falls, South Dakota (kfsd), and 
will have more of a true southeast movement to it, likely tracking thru The 
Heart of our County Warning Area from late this evening thru the overnight. This 
will have better coverage pcpn with it, and due to its forward 
speed, now looks like it will outrun the surface cold air a bit and 
probably begin as rain showers for an hour or so, then changing to 
snow showers. Overall preferred warmer MOS temps but diffs were 
very small, and temps by daybreak at most locations will be at or 
below freezing. 


The third disturbance is more directly associated with the storm 
center over the Minnesota arrowhead, and as that digs, will track more S 
initially then southeast late, and will likely affect areas near the MS 
river and east during Monday morning and early afternoon. 
Pcpn-types here will be all snow, with temps probably not rising from 
previous nighttime mins at all, and probably losing a few degrees by 
mid-afternoon. 


Low level cold air advection will strengthen significantly after midnight tonight 
and will remain decently strong thru the day on Monday, and will 
also be accompanied by an increase in northwest wind and gusts to 35mph 
most locations with some 40mph possible in northeast and central MO. 


The wind combined with the scattered snow showers that will be 
ongoing will result in rapidly fluctuating visibilities, but lower 
liquid to snow ratios than one might expect for cold air like this, 
due to the well sifted nature of any snow that does accumulate, and 
leaned strongly towards 12-15:1 versus te model suggested 20:1. 
Snow accums for most locations should be just a dusting of snow, but 
where discrete snow bands can set up and persist for a period of 
time, we could see localized accums of an inch or more. Any 
identification of the location of these discrete snow bands will 
likely have to be now-casted, with the forecast amounts strongly 
weighted towards the median, and not the exception. 


Due to the anticipated localized nature of any accums beyond a 
dusting, no winter headlines will be issued at this time. 


Tes 


Long term: (monday night through next sunday) 
issued at 320 PM CST sun Feb 7 2016 


Deep cyclonic flow and additional, yet sheared, disturbances will 
only allow the threat for snow showers to slowly retreat eastward 
and may allow flurries well into Tuesday. One trend that all of the 
models have settled on is for this Arctic airmass to build over our 
region first before heading east, and will thus prolong its presence 
here--likely into Thursday--as well as prolonging the moderately 
strong wind with gusts at times at least into Wednesday. This will 
create the threat for Wind Chill Advisory criteria (-15f) to be met 
late Tuesday night into Wednesday morning for some areas in northern 
MO and central Illinois. 


Otherwise, northwest flow aloft continues into next weekend. Very low 
confidence on any additional wx-making disturbances track/timing and 
have kept the forecast dry because of it. Something that could 
change in a couple of days, so stay tuned. Temps remain below 
average, though, with perhaps some recovery back to near average by 
Thursday-Friday. 


Of better confidence is another intrusion of Arctic air for late 
week, around Friday, and may continue into early next week. And 
that gets ME to my next item: models have, for some time, been 
advertising a system that will affect US in mid-February, but true 
to form for our region, can't make up their mind on how much cold 
air will be here and what form most of the pcpn will take. 
Something to watch and stay tuned for as we move thru the upcoming 
week. 


Tes 


&& 


Aviation: (for the 06z tafs through 06z Monday night) 
issued at 1136 PM CST sun Feb 7 2016 


Upper-level trough continues to dig southward and this will help 
bring both much colder air to the region but also some 
predominantly scattered snow showers through much of the period. 
These snow showers may briefly reduce visibilities and ceilings 
down into IFR. Otherwise...expect gusty northwest winds along with a 
high-end MVFR ceilings along with the snow showers/flurries. 




Specifics for kstl: 


Timing of MVFR ceilings and snow showers still appears to be in 
the predawn hours of Monday morning. Once again...some of these 
snow showers may be heavy enough at times through Monday morning 
to reduce visibilities and ceilings down to IFR. Best chances of 
these heavier snow showers/squalls for the terminal attm appear to 
be in the 1000 and 1600 UTC range give or take a couple of hours. 
Otherwise...northwest winds will pick up with gusts near 30 knots along 
with ceilings between 2500 and 3000 ft above ground level. 


Gosselin 


&& 


Lsx watches/warnings/advisories: 
MO...none. 
Illinois...none. 
&& 


$$ 


Weather forecast office lsx 






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