Friday, December 6, 2013

NOWCAST and RAP Model

At 4:05pm
Temp: 27 degrees
Wx: Lt to Mod Snow
Location: Home
Snow-covered roads here in the 'burbs
Accumulation has exceeded an inch; 1.3" of sleet and snow in Valley Station
This is on top of nearly 0.25" ice.
Getting reports of 3-7" across SW and southern Indiana

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At 3:15pm
Temp: 28 degrees
Wx: Lt to Mod Snow
Location: Home (see below)
Pavement sleet/snow covered; have not checked main roads; traffic cams downtown showing snow-covered to slushy roads.

Snow is now becoming the dominant precipitation in Louisville. Actually, downtown experienced changeover about an hour ago. I just saw my changeover within the past several minutes and now is snowing moderately.
Forecast is still for 2-4"; however, with earlier changeover, I wouldn't be surprised to see some higher totals.

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At 2:00pm
Temp: 29 degrees
Wx: Moderate sleet
Location: Home (see below)
Pavement slick; minor sleet accumulation
Total Ice Accumulation 0.25" or less

During the last hour, more sleet began mixing with rain; as of this writing, primary precipitation is sleet.
Pavement is becoming slick due to sleet accumulation; secondary roads becoming slick; treated roadways wet, except where sleet is falling more heavily.
Bloomington IN 7.5"
Bedford IN 5.0"
Princeton IN 7.0" (north of Evansville)
Mt Carmel IL 12.0"

Corydon IN experiencing changeover to sleet and snow during last hour.

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At  12:15pm
Temp: 30 degrees
Wx: Lt rain w/sleet
Location: Home (see below)
Wet pavement, additional icing since last report
Total Ice accumulation - 0.2"

During the last hour, sleet began mixing in with the rain in Valley Station; PRP mostly rain with some sleet trying to mix in.
6" snow near Bloomington IN
In Cadiz, near Hopkinsville I-24 reporting accidents due to icing

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At 9:45am:
Temp: 29 degrees
Wx: Very light rain
Location: Valley Station 1 mile north of Gene Snyder Freeway
Wet pavement, thin coating of ice on tree limbs (c. 0.1"), ice on windshields.

15z RAP (Rapid-Refresh Model):
For Louisville, changeover to snow by 3pm
Accumulations vary across county from 2.3" in south part of county to near 4" in northern part by 10pm.
Sleet may begin to become predominant precip between noon and 1:00pm

Snowing now in Covington, Bloomington.
Freezing rain in Evansville.
Moderate sleet in Tell City

Next update in an hour.

MS


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