| Background Information for this page | |||||
| Return to radar list for Hancock NH | |||||
| Weather data for Hancock NH. Forecast values begin July 31, 2011 | |||||
|
This table shows estimates of RELATIVE daily fireblight blossom
infection risk based on weather conditions.
Rating criteria are from the Cougarblight 2010 model developed in
Washington and Oregon by Dr. Timothy J. Smith. ABSOLUTE risk depends on the amount of fire blight bacteria in the area, the number of open flowers, and cultivar and rootstock susceptibility. Relative infection risk may be overstated for first few days of bloom because fire blight bacteria may not have been distributed to open flowers. Gray shading indicates dates when most trees will have lost open blossoms, and are therefore no longer susceptible to blossom infection. These dates included for later blooming cultivars and for late-blooming young trees. Absolute risk is much lower on these dates than during full bloom, but apple trees with open blossoms on these dates are susceptible to the risk rating shown. Fireblight infection can occur without rain if there is "heavy" dew. But heavy dew is not defined in weather reports. As a rough guess, if there is no rain on a day, but leaves are expected to be wet for at least 3 hours, then infection risk is reported with "if dew" attached. Infection potential may be overstated on days when the "if dew" tag is attached. |
|||||
| Fire blight risk categories vary by block history: | |||||
| I = No active fire blight within 1 mile of
the orchard this year or last year.
Requires 500 – 800 heat units for HIGH rating, 801 – 1000 for EXTREME!, and
1001+ for EXCEPTIONAL! II = Fire blight was present within 1 mile of the orchard last year, but not currently active in the area this year. Requires 200 – 350 heat units for HIGH rating, 351 – 500 for EXTREME!, and 501+ for EXCEPTIONAL! III = Active fire blight cankers within 1 mile of the orchard this year. Requires 100 – 200 heat units for HIGH rating, 200 – 300 for EXTREME!, and 301+ for EXCEPTIONAL! |
|||||
| If blossom infection occurred May 24, then blossom blight would be noticeable by May 31, and shoot blight by June 9. | |||||
| Range of potential open blossom dates for McIntosh and similar cultivars |
Cougarblight Heat Units, Inches Rain, & Leaf Wet Hours |
I - No
FB within one mile last year or this year |
II - FB within one mile last year, but not active within one mile this year | III - FB active within one mile of orchard this year. | |
| Mac King Bloom Sat, May 14 |
7 HU, 0.28'', 10 hrs | Low | Low | Caution | |
| Sun, May 15 | 10 HU, 1.27'', 24 hrs | Low | Low | Caution | |
| Mon, May 16 | 10 HU, 0.39'', 24 hrs | Low | Low | Caution | |
| Tue, May 17 | 11 HU, 0.51'', 24 hrs | Low | Low | Caution | |
| Wed, May 18 | 8 HU, 0.49'', 24 hrs | Low | Low | Caution | |
| Thu, May 19 | 15 HU, 0.14'', 24 hrs | Low | Low | Caution | |
| Fri, May 20 | 29 HU, 0.02'', 20 hrs | Low | Low | Caution | |
| Sat, May 21 | 51 HU, 0.23'', 23 hrs | Low | Low | Caution | |
| Sun, May 22 | 50 HU, 0.12'', 14 hrs | Low | Low | Caution | |
| Mon, May 23 | 50 HU, 0.20'', 22 hrs | Low | Low | Caution | |
| Tue, May 24 | 139 HU, 0.27'', 19 hrs | Low | Caution | HIGH | |
| Wed, May 25 | 212 HU, 0.0'', 10 hrs | Caution (if dew) | HIGH (if dew) | EXTREME! (if dew) | |
| Thu, May 26 | 468 HU, 0.0'', 3 hrs | Caution (if dew) | EXTREME! (if dew) | EXCEPTIONAL! (if dew) | |
| Fri, May 27 | 877 HU, 0.0'', 6 hrs | EXTREME! (if dew) | EXCEPTIONAL! (if dew) | EXCEPTIONAL! (if dew) | |
| Sat, May 28 | 871 HU, 0.05'', 18 hrs | EXTREME! | EXCEPTIONAL! | EXCEPTIONAL! | |
| Sun, May 29 | 1143 HU, 0.0'', 8 hrs | EXCEPTIONAL! (if dew) | EXCEPTIONAL! (if dew) | EXCEPTIONAL! (if dew) | |
| Mon, May 30 | 1269 HU, 0.0'', 0 hrs | Low | Low | Low | |
| Tue, May 31 | 1178 HU, 0.0'', 0 hrs | Low | Low | Low | |
| Wed, June 1 | 1387 HU, 0.36'', 10 hrs | EXCEPTIONAL! | EXCEPTIONAL! | EXCEPTIONAL! | |
| Thu, June 2 | 1030 HU, 0.02'', 5 hrs | EXCEPTIONAL! | EXCEPTIONAL! | EXCEPTIONAL! | |
| Fri, June 3 | 658 HU, 0.0'', 0 hrs | Low | Low | Low | |
| Sat, June 4 | 348 HU, 0.0'', 0 hrs | Low | Low | Low | |
| Sun, June 5 | 75 HU, 0.02'', 4 hrs | Low | Low | Caution | |
| Mon, June 6 | 245 HU, 0.0'', 10 hrs | Caution (if dew) | HIGH (if dew) | EXTREME! (if dew) | |
| Tue, June 7 | 602 HU, 0.0'', 0 hrs | Low | Low | Low | |
| Wed, June 8 | 1163 HU, 0.54'', 4 hrs | EXCEPTIONAL! | EXCEPTIONAL! | EXCEPTIONAL! | |
| Thu, June 9 | 1367 HU, 0.65'', 22 hrs | EXCEPTIONAL! | EXCEPTIONAL! | EXCEPTIONAL! | |
| Fri, June 10 | 1295 HU, 0.16'', 11 hrs | EXCEPTIONAL! | EXCEPTIONAL! | EXCEPTIONAL! | |
| Sat, June 11 | 930 HU, 0.97'', 22 hrs | EXTREME! | EXCEPTIONAL! | EXCEPTIONAL! | |
| Sun, June 12 | 354 HU, 0.0'', 24 hrs | Caution (if dew) | EXTREME! (if dew) | EXCEPTIONAL! (if dew) | |
| Mon, June 13 | 131 HU, 0.26'', 15 hrs | Low | Caution | HIGH | |
| Tue, June 14 | 26 HU, 0.11'', 24 hrs | Low | Low | Caution | |
| Wed, June 15 | 117 HU, 0.29'', 18 hrs | Low | Caution | HIGH | |
| Thu, June 16 | 446 HU, 0.0'', 10 hrs | Caution (if dew) | EXTREME! (if dew) | EXCEPTIONAL! (if dew) | |
| Fri, June 17 | 475 HU, 0.25'', 13 hrs | Caution | EXTREME! | EXCEPTIONAL! | |
| Sat, June 18 | 671 HU, 0.06'', 18 hrs | HIGH | EXCEPTIONAL! | EXCEPTIONAL! | |
| Sun, June 19 | 647 HU, 0.0'', 8 hrs | HIGH (if dew) | EXCEPTIONAL! (if dew) | EXCEPTIONAL! (if dew) | |
| Mon, June 20 | 478 HU, 0.0'', 0 hrs | Low | Low | Low | |
| Tue, June 21 | 702 HU, 0.0'', 0 hrs | Low | Low | Low | |
| Wed, June 22 | 534 HU, 2.05'', 14 hrs | HIGH | EXCEPTIONAL! | EXCEPTIONAL! | |
| Thu, June 23 | 477 HU, 0.41'', 24 hrs | Caution | EXTREME! | EXCEPTIONAL! | |
| Fri, June 24 | 319 HU, 0.35'', 24 hrs | Caution | HIGH | EXCEPTIONAL! | |
| Sat, June 25 | 75 HU, 0.23'', 24 hrs | Low | Low | Caution | |
| Sun, June 26 | 118 HU, 0.01'', 15 hrs | Low | Caution | HIGH | |
| Mon, June 27 | 398 HU, 0.0'', 10 hrs | Caution (if dew) | EXTREME! (if dew) | EXCEPTIONAL! (if dew) | |
| Tue, June 28 | 654 HU, 0.50'', 7 hrs | HIGH | EXCEPTIONAL! | EXCEPTIONAL! | |
| Wed, June 29 | 800 HU, 0.0'', 11 hrs | HIGH (if dew) | EXCEPTIONAL! (if dew) | EXCEPTIONAL! (if dew) | |
| Thu, June 30 | 860 HU, 0.0'', 0 hrs | Low | Low | Low | |
| Fri, July 1 | 683 HU, 0.0'', 0 hrs | Low | Low | Low | |
| Sat, July 2 | 670 HU, 0.0'', 8 hrs | HIGH (if dew) | EXCEPTIONAL! (if dew) | EXCEPTIONAL! (if dew) | |
| Sun, July 3 | 610 HU, 0.05'', 13 hrs | HIGH | EXCEPTIONAL! | EXCEPTIONAL! | |
| Mon, July 4 | 882 HU, 0.19'', 17 hrs | EXTREME! | EXCEPTIONAL! | EXCEPTIONAL! | |
| Tue, July 5 | 1203 HU, 0.0'', 10 hrs | EXCEPTIONAL! (if dew) | EXCEPTIONAL! (if dew) | EXCEPTIONAL! (if dew) | |
| Wed, July 6 | 1396 HU, 0.36'', 7 hrs | EXCEPTIONAL! | EXCEPTIONAL! | EXCEPTIONAL! | |
| Thu, July 7 | 1544 HU, 0.0'', 10 hrs | EXCEPTIONAL! (if dew) | EXCEPTIONAL! (if dew) | EXCEPTIONAL! (if dew) | |
| Fri, July 8 | 1241 HU, 0.21'', 8 hrs | EXCEPTIONAL! | EXCEPTIONAL! | EXCEPTIONAL! | |
| Sat, July 9 | 1026 HU, 0.0'', 10 hrs | EXCEPTIONAL! (if dew) | EXCEPTIONAL! (if dew) | EXCEPTIONAL! (if dew) | |
| Sun, July 10 | 902 HU, 0.0'', 0 hrs | Low | Low | Low | |
| Mon, July 11 | 1323 HU, 0.0'', 0 hrs | Low | Low | Low | |
| Tue, July 12 | 1843 HU, 0.0'', 0 hrs | Low | Low | Low | |
| Wed, July 13 | 1850 HU, 0.47'', 7 hrs | EXCEPTIONAL! | EXCEPTIONAL! | EXCEPTIONAL! | |
| Thu, July 14 | 1652 HU, 0.0'', 10 hrs | EXCEPTIONAL! (if dew) | EXCEPTIONAL! (if dew) | EXCEPTIONAL! (if dew) | |
| Fri, July 15 | 1231 HU, 0.0'', 0 hrs | Low | Low | Low | |