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Spring Frost/Freeze Information from National Weather Service Wilmington

 

…FROST/FREEZE HEADLINE INFORMATION…

A temperature of 32 degrees fahrenheit has officially been recorded
as late as May 25th in Cincinnati, May 16th at Columbus and May
21st at Dayton. However, elements such as topography, urban or
rural setting and placement of the recording instrument can create
wide variations in temperatures across an area.

National Weather Service temperatures are officially taken at an
elevation of five feet above the ground, but the temperature at
ground level may be colder. On typical spring nights when frost
occurs, the temperatures at the five foot level may read 36 degrees
while at ground level it is actually the 32 degrees needed to form
frost.

The following reference table will give an idea as to when the last
freezing temperatures might occur, based on the last 30 years of
climatological data (1981 to 2010) at each of the listed locations.

Location Avg date Last 32F in one Last 32F in nine
last 32F year out of ten years out of ten
in Spring (10% probability) (90% probability)

..Southwest Ohio
Cincinnati (KLUK) Apr 17 Apr 3 May 1
Hamilton (KHAO) Apr 19 Apr 4 May 4
Milford Apr 20 Apr 4 May 4
Wilmington Apr 20 Apr 5 May 4

..Central Ohio
Circleville Apr 21 Apr 6 May 5
Columbus (KCMH) Apr 16 Apr 1 May 1
Delaware Apr 25 Apr 11 May 9
Lancaster Apr 19 Apr 5 May 6
Logan May 2 Apr 19 May 18
London Apr 27 Apr 14 May 9
Marysville Apr 19 Apr 4 May 4
Newark Apr 28 Apr 16 May 14
Washington CH Apr 18 Apr 4 May 3

..Miami Valley
Bellefontaine Apr 25 Apr 10 May 11
Celina Apr 22 Apr 8 May 6
Dayton (KDAY) Apr 19 Apr 5 May 3
Eaton Apr 22 Apr 9 May 6
Greenville Apr 23 Apr 9 May 7
Kenton Apr 23 Apr 9 May 8
Springfield Apr 25 Apr 12 May 9
Xenia Apr 17 Apr 2 May 2

..South Central Ohio
Chillicothe Apr 21 Apr 7 May 6
Hillsboro Apr 17 Apr 3 May 1
Portsmouth Apr 17 Apr 1 May 4

..Kentucky
Carrollton Apr 16 Mar 31 May 3
Covington (KCVG) Apr 16 Apr 2 May 2
Falmouth Apr 21 Apr 5 May 8
Maysville Apr 18 Apr 4 May 1
Warsaw Apr 23 Apr 7 May 8
Williamston Apr 14 Mar 29 Apr 30

..Indiana
Brookville Apr 21 Apr 7 May 5
Milan Apr 28 Apr 13 May 16
Richmond Apr 23 Apr 9 May 8
Vevay Apr 15 Mar 31 Apr 30

Frost/freeze headlines have been initiated for areas roughly along
and south of I-70. This includes areas along and south of a Wayne
County Indiana to Fairfield County Ohio line.

For the remainder of the area, an exact start date for frost/freeze
headlines will be determined based on vegetation status and expected
weather conditions.

 

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Soil Moisture Condition Monitoring Weekly Report: Near Normal

United States Drought Monitor

Station Number: OH-HM-24
Station Name: Cheviot 3.4 W
Report Date: 4/4/2020
Submitted: 4/04/2020 6:44 AM
Scale Bar: Near Normal
Description:

Only 0.25 inches of rain in the past week with generally low humidity, mild temperatures, and rapid drying. Swales are still moist but normal for spring. Waterways have returned to pool stage. Cherry trees in full bloom and crabapples showing first bloom.

Categories:
General Awareness
Business & Industry
Plants & Wildlife

–

This report is specifically for the Arbor Doctor’s location 3.4 miles west of Cheviot, OH, in the western suburbs of Cincinnati in southwest Ohio. This location is also an official cooperative observation site for the National Weather Service listed as Cheviot 3W.

What is the Condition Monitoring Report? See these links for more information:

Explanation of scale bar>>>

Search condition monitoring reports for the entire US>>>  

CoCoRaHS Condition Monitoring Report Map>>> 

Please remember to water…correctly!

Water once per week, one inch per week, under the entire branch spread, in the absence of rain, May through November. Either rainfall or your watering should equal the one inch per week. Put out a sprinkler and a straight sided soup can or rain gauge and measure one inch per week.

11-inch capacity rain gauge  

Taylor rain gauge   

Watering: How and when.

Watering Trees and Shrubs.

 

Soil Moisture Index:

Meteorological Versus Astronomical Seasons. Spring is here!

Spring: March 1-May 31; Summer: June 1-August 31; Fall: September 1-November 30; Winter: December 1-February 28 (29)

You may have noticed that Arbor Doctor, meteorologists and climatologists define seasons differently from “regular” or astronomical spring, summer, fall, and winter. So, why do  meteorological and astronomical seasons begin and end at different times? Read more here>>>

 Spring leaf out (click on map to enlarge):

Comparison of 2020 spring leaf out to average from 1981-2010

Spring bloom index (Click on map to enlarge):

Comparison of 2020 spring bloom to average from 1981-2010
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The Super Outbreak of Tornadoes – April 3-4, 1974

Tornado number 43, the Sayler Park F5, is the only tornado I ever personally witnessed. I was in third grade. Map by Dr. T. Fujita, University of Chicago

April 3 is an infamous day in Cincinnati, Xenia, Louisville, and many other locations in the United States. On this date in 1974 one of the largest tornado outbreaks in US history rampaged across the eastern US.

There were six F5 tornadoes that day, more than in any one day in any outbreak in US history. The US can go several years between F5, or now EF5, tornadoes. Two of the F5 tornadoes hit Xenia, OH, and the west side of Cincinnati.

The Xenia tornado was thought to be one of the strongest ever to hit the US. The west side Cincinnati tornado was actually a tri-state tornado, first touching down near Rising Sun, Indiana, then crossing the Ohio River and moving through Boone County, Kentucky, then crossing the Ohio River again and tearing the heart out of Sayler Park, then moving along South Road in Green Township before roping out and lifting in Dent.

The Sayler Park tornado was the only tornado I ever personally witnessed, viewing it from my family’s house in Westwood. The devastation on that day was sobering. Nobody who lived through it will ever forget that day.

More information and multiple photos here>>>

Observations

Local/National Analysis

Aerial Damage Photos

Ground Damage Photos

Xenia F5 Track Map