Up to a foot of snow buries Oklahoma, Arkansas, Kansas and Texas

Chicago escaped the latest spring storm rather unscathed compared to some of our neighbors to the south.   Up to a foot of new snowfall is being reported this Sunday morning across portions of four southern states   The snow extended as far south as north Texas where some suburban residents of Dallas awoke to over a half foot of snow. 

Here are some of the storm totals                                    Below:  Fayetteville, Arkansas at 8:15 this AM

03 21 2010 0815_s fayetteville ar.jpg12.0″  Fayetteville, AR

12.0″  Fort Scott, KS

12.0″  Jerico Springs, MO

12.0″  Siloan Springs, OK

11.5″  Westville, OK

 8.3″   Carbondale, KS

 8.0″   Plano, TX

 8.0″   Miami, OK

 8.0″   Sadalaia, MO

 5.6″   McKinney, TX

 

Below:  Winter Storm Warnings are still in effect this Sunday morning from Kansas City, Missouri to Dallas, TX 

3.21alerts_national_650.jpg

 

 

Snow should disappear in the Chicago area as temperatures rebound quickly

After a mostly cloudy cool day Sunday, astronomical spring will shift
in gear Monday and with winds shifting to the southwest temperatures
are expected to return to the 60-degree level by Tuesday afternoon.
This means the thin layer of snow deposited over much of the area
Saturday–greatest amounts were between 2 and 3 inches–will probably
be gone, perhaps as soon as Monday.

Heavy snows to the south

As
a strong low pressure system tracks east out of the southern plains,
Winter Storm Warnings were posted for eastern Oklahoma, southeast
Kansas, Southwest Missouri and northwestern Arkansas where
Saturday-Sunday snowstorm totals of 6 to 12 inches were forecast. The
cold air was to moderate, with primarily rain expected as the low
center tracks east reaching the mid-Atlantic coast Tuesday.

Warmup next weekend

Wednesday
through Friday northeastern Illinois temperatures are expected to
average a little above seasonal norms with 60-degree readings marking
the return of strong southerly winds the start of next weekend.

The spectacle of a double rainbow

Dear Tom,
On March 11, I saw a large rainbow with another one that was very dim surrounding it. Were my eyes playing tricks on me?

–Terry Sandhill
Dear Terry,
The spectacle of a double rainbow — so-called primary and secondary (or supernumerary) — is a grand sight and several were seen across northern Illinois and Indiana on March 11.
Rainbows form when sunlight passes into raindrops and, after reflection within the drops and refraction, leaves the raindrops and returns to our eyes separated into the colors of the spectrum. The color sequence in the primary rainbow, from the outside inward, is red, yellow, green and blue. A secondary, and fainter, rainbow forms above the primary when some of the light is reflected twice within each raindrop. The supernumerary color sequence is reversed because of the double reflection.

4PM Storm Update

Snow continues to fall across much of the Chicago area this afternoon.  The snow is not as intense, or as heavy as it was earlier today, and is mixing with rain over some southern suburbs. 

While some accumulation has been noted this afternoon, it appears that a good portion of the snow is melting, especially on road surfaces and sidewalks.

This Evening:   The snow or snow/rain mix is expected to decrease in intensity.  Any additional accumulation should be 1″ or less. 

Overnight:  The snow should taper to flurries or sprinkles.   Surface temperatures will fall below 32F away from Lake Michigan, leading to some re-freeze.   Be on the lookout for icy patches on sidewalks, secondary roads and bridges if you are going to be out and about tonight. 

A few recent snowfall totals:

3.0″  Cary

2.5″  De Kalb

1.5″  Batavia

1.1″  Chicago-O-Hare

1.1″  Chicago- Midway

 

12:30PM Storm Update

The steady snow that has encompaseed much of the Chicago area this morning will become more intermittent this afternoon as the atmospheric forcing that is driving the precipitation begins to weaken. 

North of I-80:   Total snow accumulation of 1″ to 3″ is expected on grassy areas/rooftops.   Pavement (sidewalks and roads) should remain generally wet with some slush.

South of I-80:  Little or no accumulation is expected (under 1″). 

Tonight:   All of the snow and rain should taper or end with little or no additional accumulation expected. 

 

Below:  The short term snowfall forecast from NCEP’s (National Center for Environmental Prediction) RUC model.  Note that the additional snowfall accumulation this afternoon across northern Illinois should be around 1″ or less, while the heaviest snows (perhaps in excess to 8″!) are expected to fall from Kansas City to Tulsa.  
snwtot_nc_12.pngGraphic courtesy of NOAA/NCEP