Frost Summary

Description:

This program produces a summary table of the dates of the first and last freeze for the temperature thresholds 36, 32, 28, 24, 20 and 16 degrees Fahrenheit. The methodology is similar to that described in the Frost Statistics help file.

Price

The price for this product is $0.50/summary.

Sample

Frost Summary

Station: NEWARK UNIVERSITY FA State: DE ID: 076410
Latitude: 39.67 degrees Longitude: -75.73 degrees Elevation: 90 feet
Station period of record: 08/01/1948 - 04/30/2002

CLIMOD Product: Frost Statistics Summary Creation Time: 08/01/2002 11:19 EDT
Spring/Fall Cutoff Date: August 1 Requested years: 1971- 2000 Distribution: Normal

Probability of Later Date in Spring Than Indicated
Temperature Earliest .90 .80 .70 .60 .50 .40 .30 .20 .10 Latest
36 04/04  04/17   04/22   04/25   04/28   05/01   05/03   05/06   05/10   05/14  05/18
32 04/04  04/07   04/11   04/13   04/16   04/18   04/20   04/22   04/25   04/29  05/08
28 03/20  03/26   03/30   04/02   04/05   04/07   04/10   04/13   04/16   04/20  05/01
24 03/03  03/10   03/14   03/17   03/20   03/22   03/25   03/27   03/30   04/04  04/10
20 02/12  02/23   02/28   03/04   03/07   03/10   03/14   03/17   03/21   03/26  04/07
16 02/04  02/06   02/12   02/17   02/21   02/25   03/01   03/05   03/10   03/17  04/07

Probability of Earlier Date in Fall Than Indicated
Temperature Earliest .10 .20 .30 .40 .50 .60 .70 .80 .90 Latest
36 09/24  09/30   10/04   10/07   10/09   10/12   10/14   10/17   10/20   10/24  11/04
32 10/03  10/10   10/15   10/18   10/21   10/23   10/26   10/29   11/01   11/05  11/08
28 10/14  10/19   10/25   10/30   11/02   11/05   11/09   11/12   11/17   11/22  12/03
24 10/21  11/05   11/10   11/14   11/17   11/20   11/23   11/26   11/29   12/04  12/15
20 11/06  11/16   11/23   11/28   12/02   12/06   12/10   12/14   12/19   12/25  01/01
16 11/21  12/04   12/10   12/14   12/18   12/22   12/25   12/29   01/03   01/09  01/16

Probability of Longer Than Indicated Freeze Free Period (days)
Temperature Longest .10 .20 .30 .40 .50 .60 .70 .80 .90 Shortest
36 193 182 175 171 166 163 159 155 150 144 138
32 212 205 199 194 191 187 183 179 175 169 147
28 246 234 226 220 216 211 207 202 196 188 176
24 262 257 251 247 244 240 237 233 229 223 208
20 306 289 281 276 271 267 262 258 252 244 234
16 338 323 314 308 302 297 292 287 281 272 246

Notes:
  • These tables present probabilities of observing a temperature as cold, or colder, later in the spring or earlier in the fall than the indicated date (month/day).
  • Temperature thresholds are in degrees Fahrenheit.

For additional assistance, you can contact the HPRCC.