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Sep
23

Widespread Frost on the Way

By · September 23, 2012 at 8:04 pm

The entire Hoosier State will be under a Frost Advisory early in the morning with clear skies and calm winds expected to drop most outlying areas into the low to mid 30s. The city of Indianapolis may stay warmer (mid to upper 30s). It’s a good idea to protect your plants!

Here’s a look at our actual lows Sunday morning. We fell to 39 officially for Indy, making it the coldest since April 27th! Many outlying areas were cold enough for a patchy frost…but widespread frost will be likely for Monday morning.

It is unusually early to get frost in September! The chart below (thanks to the National Weather Service in Indianapolis) shows a frost threshold of 36 degrees or lower.  Check your location to see just how early the frost will be:

Low Temperature of 36 degrees or lower (Patchy frost possible in outlying, low areas)

Location
Normal First Date
Latest Date
Earliest Date
Records To
Farmland
September 27
October 27, 1914
August 29, 1965
1893
Kokomo
September 28
October 28, 1941
September 8, 1986
1901
Elwood
September 29
October 26, 2005
September 13, 1964
1948
Martinsville
September 29
October 17, 1973
September 8, 1986
1950
West Lafayette
September 29
November 7, 1940
August 29, 1965
1901
Delphi
September 30
October 25, 1914
August 29, 1965
1893
Muncie
October 1
October 26, 1967
September 12, 1993
1965
Seymour
October 2
November 8, 1900
September 12, 1955
1893
Spencer
October 2
October 17, 1973
September 12, 1955
1949
Whitestown
October 2
October 27, 1914
September 3, 1908
1901
Winchester Airpt
October 2
October 25, 1990
August 14, 1964
1942
Frankfort
October 3
October 27, 2005
August 29, 1965
1914
Newcastle
October 3
October 18, 1954
September 8, 1956
1949
Rushville
October 3
October 25, 2005
August 30, 1946
1901
Shelbyville
October 3
October 29, 1897
September 6, 1924
1897
Shoals
October 4
October 27, 1914
September 10, 1924
1913
Anderson
October 5
October 26, 2005
September 8, 1956
1895
Terre Haute
October 5
October 27, 1956
September 14, 1964
1955
Columbus
October 6
November 6, 1919
September 6, 1924
1893
Greenfield
October 6
November 4, 1971
September 14, 1923
1903
Rockville
October 6
October 25, 2005
September 13, 1902
1893
Greencastle
October 7
November 4, 1971
September 14, 1923
1895
Indianapolis Airpt
October 7
October 28, 2005
September 23, 1995
1943
Washington
October 8
November 8, 1956
September 13, 1902
1897
Freelandville
October 9
November 8, 1956
September 22, 1983
1929
Crane Naval Dep
October 11
November 8, 1956
September 22, 1983
1942
Bloomington
October 13
November 5, 1971
September 13, 1899
1895

Some outlying areas could see their first FREEZE of the season, which is even more unusual this early.  Here’s the chart from the National Weather Service:

Low Temperature of 32 degrees or lower (Frost becomes widespread, with isolated pockets of hard freeze possible)

Location
Normal First Date
Latest Date
Earliest Date
Records To
Farmland
October 06
November 11, 1897
September 17, 1937
1893
Martinsville
October 06
October 28, 2005
September 14, 1964
1950
Delphi
October 08
October 29, 2005*
September 14, 1964
1893
Kokomo
October 08
November 12, 1919
September 20, 1991
1901
Spencer
October 08
November 02, 1984
September 20, 1991
1949
Elwood
October 09
November 04, 1971
September 18, 1959
1948
West Lafayette
October 09
November 13, 1946
September 18, 1959
1901
Whitestown
October 10
November 11, 1918
September 03, 1908
1901
Frankfort
October 11
November 16, 1922
September 12, 1955
1914
Newcastle
October 11
November 04, 1971
September 17, 1959
1949
Terre Haute
October 11
November 03, 1973
September 21, 1991
1955
Muncie
October 12
November 04, 1971
September 20, 1991
1965
Seymour
October 12
November 08, 1947
September 15, 1923
1893
Shoals
October 12
November 06, 1947
September 15, 1919
1913
Winchester Arpt
October 13
November 08, 1947
September 20, 1956
1942
Rockville
October 14
November 23, 1902
September 16, 1916
1893
Rushville
October 14
November 09, 2004
September 14, 1923
1901
Greenfield
October 15
November 20, 2001
September 14, 1923
1903
Shelbyville
October 15
November 11, 1897
September 14, 1923
1897
Indianapolis Arpt
October 16
November 08, 1956
September 30, 1993
1943
Anderson
October 17
November 20, 1985
September 19, 1901
1895
Columbus
October 19
November 12, 1919
September 14, 1902
1893
Greencastle
October 20
November 23, 1902
September 23, 1995
1895
Washington
October 20
November 15, 1970
September 24, 1928
1897
Crane Naval Dept
October 23
November 22, 1994
September 22, 1983
1942
Freelandville
October 23
November 20, 1985
September 25, 1950
1929
Bloomington
October 24
November 23, 1902
September 13, 1899
1895

Check out the maps below for forecast morning lows in cities and towns across the WTHR-TV viewing area. 38 for Indy would be one degree colder than Sunday’s low, but it won’t be a record. The record low for September 24th is 34 set in 1887.

We’ll rebound nicely through the day with highs reaching upper 60s by late afternoon thanks to mostly sunny skies and milder southwesterly winds.

Your WTHR-TV 7-day shows even warmer air moving in (along with clouds and rain) as a warm front moves through Monday night/early Tuesday. Rain is possible through the end of the week, though Thursday and Friday it could stay mainly to the south.

Finally, our WTHR Hoosier Pic at 6 from Marina Bolton who captured a great nature shot on the first full day of Fall! Share your pic here: https://www.facebook.com/ChikageWindlerFanPage or here: https://www.facebook.com/WTHR13?ref=ts

Have a great week!
-Chikage

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