Zone 6 &7 Forecast Discussion: Cold Air Moving In, Stormy Pattern Continues. JT.

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Forecast Discussion:

EVENING – TONIGHT: We started the day across zones 6 and 7 with rain and some thunderstorms. However, the cold front has moved across the state and temperatures have responded. We have quickly fallen right at or below freezing in many locations!

TEMP

Any moisture that remains is changing over from rain to snow across Illinois. While a burst of intense snow is possible, very little to no accumulation is forecast this evening. The main story will be any wet surface will quickly freeze as temperatures drop, so that would make for some slippery conditions on any untreated roadways.

CURRENT

Overnight an area of high pressure will build into the region. As it does dry air will work in with it, so any remaining snow showers should come to an end by 10 pm to midnight across Illinois.

While winds overnight will be pretty strong with gusts of 25-35 mph possible, they look to really slacken up into Wednesday morning.

Lows overnight will be in the low 20’s to low 30’s.

WEDNESDAY: The area of high pressure looks to be in control through mid-day on Wednesday, but another clipper system will dive out of the northeast moving closer to the region through the day. So while we may start with some sunshine I think by afternoon clouds will be thickening up across the zones.

wedpressure

The daytime hours should be dry on Wednesday. However, by 7-8 PM Wednesday night some isolated to widely scattered showers will become possible across the zones.

wedpan

Highs on Wednesday will be in the mid 30’s north to upper 40’s south. Winds will be on the decrease through the day with sustained winds of 5-15 mph out of the southwest to southeast.

Wednesday night rain looks increasingly likely and by 1 AM better rain chances will be in places across zones 6 and 7.

thu1am

Through the overnight it currently looks like temperatures will remain above freezing and will support an all rain event across the forecast area. Lows overnight will be in the mid 30’s to low 40’s across the area.

By 4-8 AM Thursday a period of some heavy rain looks to move across portions of the zones. While models are a little different on placement, right now northern zone 6 into zone 7 looks to be the better areas of focus for that heavier rain.

THU4AM

I will mention these clipper systems do seem to have mind of their own. While I do not anticipated any major changes in the forecast, these systems do have a trend to shift southward. So it wouldn’t be totally surprising if the snowfall track ends up a bit south too. It’s something we will watch over the next 24-36 hours.

snow threat

THURSDAY: The area of low pressure will move off to the regions south through the day on Thursday. It looks like the majority of the rain will come to an end through the morning hours.

THU10AM

While .10-.30” of rainfall will be most common Wednesday night through Thursday. However, places that do get under the heavier areas of rain could see .40-60” locally.

24hqpfrv (1)

However, some isolated showers can’t be ruled out through the afternoon. I think better chances of rain will be across very southern zone 6 in the afternoon.

THU4PM

By late afternoon and into the evening most, if not all the rain will exit out of the zones.

Highs on Thursday will be in the upper 30’s to around 50 south.

thupan

Overnight Thursday into Friday another area of high pressure will build into Illinois. Lows overnight will be in the low 20’s north to mid 30’s south.

FRIDAY – SATURDAY AM: High pressure looks to remain in control through the daytime hours on Friday. This will lead to decreasing clouds through the day.

Highs on Friday will be in the mid 30’s to upper 40’s.

fripan

Through the end of the week and into the weekend we will continue on that active northwesterly flow aloft.

500GIF

This will usher in yet another clipper system from the northwest and by Friday night we will be watching another area of low pressure move closer to the region. By midnight precipitation will start to spread back into the forecast zones. Right now it looks like it will be rain. However, it is a forecast we will be watching closely and will iron out over the next few days.

FRIGIF
FRI 7 PM – SUN 1 AM

The good news is, most of the models do have it out of the zones by early Saturday. So the weekend looks to be mostly dry.

WEEKEND: An area of high pressure will build into the region on Saturday. While clouds may stick around for Saturday, it does look like we will clear out for Sunday. This should give us sunny to mostly sunny skies Sunday.

SUNPRESS

Temperatures will begin to moderate as well, especially on Sunday. Highs on Sunday will be near 50° north and into the low 60’s south!

7 DAY FORECAST

WEDNESDAY: A FEW AM SNOW SHOWERS WITH PARTLY SUNNY SKIES. CLOUDS INCREASING IN THE AFTERNOON, CHANCE OF RAIN AND/OR SNOW LATE. HIGHS IN THE MID 30’S NORTH TO UPPER 40’S SOUTH. WINDS FROM THE SOUTHWEST TO SOUTHEAST AROUND 5-15 MPH.

WEDNESDAY NIGHT: CLOUDY WITH A CHANCE OF SNOW, SOME RAIN POSSIBLE SOUTH. SOME SNOW ACCUMULATIONS POSSIBLE NORTH. LOWS IN THE UPPER 20’S NORTH TO UPPER 30’S SOUTH.

THURSDAY: CLOUDY WITH A CHANCE OF RAIN AND SNOW. LIKELY SEEING SNOW TO RAIN CHANGEVOER DURING THE DAY. HIGHS IN THE MID 30’S NORTH TO AROUND 50 SOUTH. EASTERLY WINDS AT 6-12 MPH, GUSTING TO 20 MPH.

THURSDAY NIGHT: PARTLY TO MOSTLY CLOUDY, RAIN AND SNOW ENDS. LOWS IN THE LOW 20’S NORTH TO MID 30’S SOUTH.

FRIDAY: DECREASING CLOUDS WITH HIGHS IN THE MID 30’S TO UPPER 40’S. EAST TO SOUTHEASTERLY WINDS AT 5-15 MPH.

FRIDAY NIGHT: MOSTLY CLOUDY WITH INCREASING CHANCE FOR RAIN AND/OR SNOW SHOWERS. LOWS IN THE UPPER 20’S NORTH TO AROUND 40 SOUTH.

SATURDAY: CLOUDY WITH A CHANCE OF RAIN. HIGHS IN THE LOW 40’S TO MID 50’S. WEST TO SOUTHWEST WINDS AT 6-12 MPH, GUSTING TO 25 MPH.

SATURDAY NIGHT: RAIN ENDS AND SKIES CLEAR. LOWS IN THE MID 20’S TO MID 30’S.

SUNDAY: SUNNY TO MOSTLY SUNNY, WARM. HIGHS IN THE UPPER 40’S NORTH TO LOW 60’S SOUTH.

SUNDAY NIGHT: MOSTLY CLOUDY WITH A CHANCE OF RAIN. LOWS IN THE UPPER 30’S TO MID 40’S.

MONDAY: MOSTLY CLOUDY WITH A 30% CHANCE FOR RAIN. HIGHS IN THE MID 50’S NORTH TO UPPER 60’S SOUTH.

MONDAY NIGHT: CLOUDY WITH A 40% CHANCE OF RAIN AND A FEW T’STORMS. LOWS IN THE 50’S.

TUESDAY: PARTLY TO MOSTLY CLOUDY, 30% CHANCE OF RAIN OR T’STORMS. HIGHS IN THE MID 60’S TO LOW 70’S.

TUESDAY NIGHT: CLOUDY WITH A 30% CHANCE OF RAIN AND STORMS. LOWS IN THE MID 50’S TO MID 60’S.