NWS Wilmington Ohio Spring Frost/Freeze Program Start Dates
PUBLIC INFORMATION STATEMENT
NATIONAL WEATHER SERVICE WILMINGTON OH
320 PM EDT MON APR 6 2009
WHEN DOES THE LAST FREEZE OF THE SEASON NORMALLY OCCUR?
A TEMPERATURE OF 32 DEGREES FAHRENHEIT HAS OFFICIALLY BEEN RECORDED
AS LATE AS MAY 25TH IN CINCINNATI...MAY 16TH AT COLUMBUS AND MAY
22ND 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 AT LEAST 30 YEARS OF
CLIMATOLOGICAL DATA AT EACH OF THE LISTED LOCATIONS.
LOCATION AVG DATE LAST LAST 32F IN ONE LAST 32F IN NINE
32F IN SPRING YEAR OUT OF TEN YEARS OUT OF TEN
(10% PROBABILITY) (90% PROBABILITY)
..IN SOUTHWEST OHIO
CINCINNATI APR 21 APR 8 MAY 5
DAYTON APR 24 APR 2 MAY 9
HAMILTON APR 28 APR 14 MAY 11
HILLSBORO APR 23 APR 9 MAY 7
MILFORD APR 30 APR 17 MAY 18
WILMINGTON MAY 2 APR 16 MAY 18
XENIA APR 29 APR 15 MAY 12
..CENTRAL OHIO
CHILLICOTHE APR 22 APR 9 MAY 5
CIRCLEVILLE APR 30 APR 15 MAY 15
COLUMBUS APR 30 APR 15 MAY 15
DELAWARE MAY 3 APR 18 MAY 18
LANCASTER MAY 3 APR 20 MAY 16
LONDON MAY 2 APR 17 MAY 17
MARYSVILLE MAY 2 APR 17 MAY 17
NEWARK MAY 3 APR 18 MAY 19
WASHINGTON C.H. APR 26 APR 11 MAY 10
..WEST CENTRAL OHIO
BELLEFONTAINE MAY 3 APR 17 MAY 19
GREENVILLE MAY 3 APR 18 MAY 18
KENTON MAY 4 APR 20 MAY 18
SIDNEY MAY 5 APR 17 MAY 24
SPRINGFIELD APR 23 APR 8 MAY 9
URBANA MAY 3 APR 18 MAY 18
..SOUTH CENTRAL OHIO
PORTSMOUTH APR 14 APR 1 APR 26
WAVERLY MAY 3 APR 18 MAY 22
..IN KENTUCKY
CARROLLTON APR 21 APR 8 MAY 5
COVINGTON APR 21 APR 10 MAY 6
CYNTHIANA APR 25 APR 13 MAY 11
FALMOUTH APR 23 APR 11 MAY 21
MAYSVILLE APR 24 APR 2 MAY 9
WARSAW APR 27 APR 7 MAY 9
WILLIAMSTOWN APR 19 APR 6 MAY 5
..IN INDIANA
RICHMOND MAY 1 APR 14 MAY 18
VERSAILLES APR 28 APR 11 MAY 15
VEVAY APR 23 APR 6 MAY 10
DUE TO ABOVE NORMAL TEMPERATURES IN MARCH...THE GROWING SEASON HAS
ALREADY BEGUN ACROSS PARTS OF THE REGION. AFTER CONSULTATION WITH
SEVERAL COUNTY AGRICULTURE EXTENSION OFFICES...IT APPEARS THAT A
HARD FREEZE COULD ADVERSELY AFFECT SOME FRUIT TREES ABOUT AS FAR
NORTH AS INTERSTATE 70. AS A RESULT...FROST/FREEZE HEADLINES HAVE
BEGUN ACROSS THE WILMINGTON, OHIO FORECAST AREA FOR AREAS ALONG AND
SOUTH OF INTERSTATE 70. WEST CENTRAL OHIO AND THE NORTHERN PORTIONS
OF CENTRAL OHIO WILL BEGIN NO LATER THAN MAY 1ST.
.PLEASE VISIT OUR WEB SITE AT WWW.ERH.NOAA.GOV/ILN/SPRINGFRZMAP.HTM
FOR A GRAPHICAL PRESENTATION OF WHEN FROST/FREEZE HEADLINES WILL
BEGIN FOR YOUR COUNTY.
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NWS Wilmington Ohio Spring Frost/Freeze Program Start Dates