Overcast today, a wet weekend ahead - WRCBtv.com | Chattanooga News, Weather & Sports

Overcast today, a wet weekend ahead

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CHATTANOOGA, TN (WRCB) -- Good Thursday.  Well, if you don't like the forecast...wait about 5 minutes.  It's sure to change.

While the weekend forecast has been a bit "iffy" to say the least, it is starting to come into focus a bit.

There are 3 weather features that will play a part in our forecast for the next few days.

Feature #1... A trough of low pressure over the northern Gulf.  This will shoot some lots of clouds into the area again today, but (like yesterday) the chance of rain is very small.  This same low will add energy to the next feature we will talk about, a cold front.

Feature #2...A cold front currently bringing snow to parts of the Plains and the Midwest.  This front will begin to approach our area by Friday evening.  As it does, it will draw up energy from the low over the northern Gulf and begin to produce showers over the area Friday night.  This rain will last on and off through the day Saturday.  I do not expect severe weather, but heavy rain and localized flooding are certainly possible.  2" of rain are expected through the weekend at least.

Feature #3...A cut-off area of low pressure.  This low is associated with the cold front, but will act almost as a separate weather maker for us.  The cold front will pass through Saturday evening, and we will even see some dry weather moving in Saturday night and into the first part of Sunday.  The cut-off low will then move through Sunday afternoon, and bring us another round of rainfall.  The problem with a cut-off low is it is "cut off" from the jet stream which pushes areas of low pressure across the country, and can sit over an area for a few days.  We may see this low sitting over us through the first part of next week, producing more rain all the while.

Temps this weekend will be cooler, with highs in the 60s and lows in the low 50s.     David Karnes

Download the WRCB weather app for the 10 day forecast and the interactive radar for your smartphone or tablet.


Thursday:

8am...Overcast, 59

Noon...Overcast, 72

5pm...Overcast, 76

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