“Flashback” to 2020

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Relative Flowering Times for Broadleaf Weeds (GDD 50)
through Mon, Apr. 20. 2020

 

GDD Total: 20 (Base 50) through Mon, Apr. 20, 2020

  

East Lansing, MI

       

Late Season (Biennials and Perennials)

1401

Mid Season and Late Season (SA and Perennials)

601

Mid Season (Perennials)

201

Early and Mid Season (WA and Perennials)

21

Early Season (WA)

5

 

Generously Supported By:



Tabular Data

Daily GDD accumulation for various base temperature models in 2021 & 2020

2021Lo
(F)
Hi
(F)
GDD
22
GDD
32
GDD
42
GDD
50
GDD
55
02-15 12° 3 0 0 0 0
02-16 -2° 17° 3 0 0 0 0
02-17 -16° 20° 3 0 0 0 0
02-18 22° 3 0 0 0 0
02-19 10° 26° 3 0 0 0 0
02-20 25° 3 0 0 0 0
02-21 31° 3 0 0 0 0
02-22 28° 35° 12 0 0 0 0
02-23 34° 43° 29 6 0 0 0
02-24 31° 44° 44 12 0 0 0
02-25 17° 37° 49 12 0 0 0
02-26 18° 40° 56 12 0 0 0
2021Lo
(F)
Hi
(F)
GDD
22
GDD
32
GDD
42
GDD
50
GDD
55
02-27 33° 48° 75 21 0 0 0
02-28 34° 55° 97 33 2 0 0
02-29 n/a n/a n/a n/a n/a n/a n/a
03-01 20° 36° 103 33 2 0 0
03-02 14° 40° 108 33 2 0 0
03-03 31° 51° 127 42 2 0 0
03-04 24° 34° 134 42 2 0 0
03-05 20° 42° 143 42 2 0 0
03-06 22° 40° 152 42 2 0 0
03-07 17° 39° 158 42 2 0 0
03-08 32° 61° 182 57 7 0 0
03-09 31° 63° 207 72 12 0 0
2021Lo
(F)
Hi
(F)
GDD
22
GDD
32
GDD
42
GDD
50
GDD
55
03-10 43° 69° 242 96 26 6 1
03-11 41° 63° 272 116 36 9 1
03-12 30° 52° 290 125 36 9 1
03-13 20° 52° 305 129 36 9 1
03-14 31° 46° 321 136 36 9 1
03-15 22° 38° 329 136 36 9 1
03-16 30° 44° 344 141 36 9 1
03-17 26° 58° 364 151 36 9 1
03-18 31° 43° 380 156 36 9 1
03-19 25° 48° 394 161 36 9 1
03-20 22° 57° 412 168 36 9 1
03-21 27° 65° 435 182 40 9 1
2021Lo
(F)
Hi
(F)
GDD
22
GDD
32
GDD
42
GDD
50
GDD
55
03-22 38° 68° 467 203 51 12 1
03-23 47° 71° 503 230 68 21 5
03-24 51° 67° 541 257 86 30 10
03-25 45° 56° 569 276 94 30 10
03-26 36° 49° 590 286 95 30 10
03-27 35° 55° 613 299 98 30 10
03-28 34° 52° 634 310 99 30 10
03-29 27° 51° 651 317 99 30 10
03-30 44° 69° 685 342 113 37 11
03-31 32° 51° 705 351 113 37 11
04-01 25° 36° 713 351 113 37 11
04-02 19° 46° 723 351 113 37 11
2021Lo
(F)
Hi
(F)
GDD
22
GDD
32
GDD
42
GDD
50
GDD
55
04-03 31° 64° 749 367 119 37 11
04-04 33° 68° 777 385 127 37 11
04-05 47° 63° 810 408 140 42 11
04-06 43° 78° 848 436 158 52 16
04-07 55° 79° 893 472 183 69 29
04-08 58° 73° 937 505 207 85 39
04-09 52° 70° 976 535 226 96 46
04-10 44° 73° 1013 561 243 105 49
04-11 48° 58° 1044 582 254 108 49
04-12 43° 61° 1074 602 264 110 49
04-13 37° 60° 1100 619 270 110 49
04-14 35° 50° 1121 629 271 110 49
2021Lo
(F)
Hi
(F)
GDD
22
GDD
32
GDD
42
GDD
50
GDD
55
04-15 34° 45° 1138 637 271 110 49
04-16 37° 57° 1164 652 276 110 49
04-17 32° 58° 1186 665 279 110 49
04-18 35° 59° 1212 680 284 110 49
04-19 39° 57° 1238 696 290 110 49
04-20 32° 39° 1251 700 290 110 49
04-21 25° 42° 1263 702 290 110 49
04-22 25° 52° 1280 708 290 110 49
04-23 34° 61° 1306 724 296 110 49
04-24 40° 58° 1333 741 303 110 49
04-25 36° 57° 1357 755 307 110 49
04-26 37° 64° 1386 774 316 110 49
2021Lo
(F)
Hi
(F)
GDD
22
GDD
32
GDD
42
GDD
50
GDD
55
2020Lo
(F)
Hi
(F)
GDD
22
GDD
32
GDD
42
GDD
50
GDD
55
02-15 31° 0 0 0 0 0
02-16 26° 36° 9 0 0 0 0
02-17 19° 33° 13 0 0 0 0
02-18 27° 36° 23 0 0 0 0
02-19 16° 28° 23 0 0 0 0
02-20 11° 22° 23 0 0 0 0
02-21 11° 31° 23 0 0 0 0
02-22 24° 43° 35 2 0 0 0
02-23 31° 48° 52 9 0 0 0
02-24 32° 43° 68 15 0 0 0
02-25 30° 36° 79 16 0 0 0
02-26 23° 30° 83 16 0 0 0
2020Lo
(F)
Hi
(F)
GDD
22
GDD
32
GDD
42
GDD
50
GDD
55
02-27 20° 23° 83 16 0 0 0
02-28 15° 26° 83 16 0 0 0
02-29 16° 33° 86 16 0 0 0
03-01 20° 45° 97 17 0 0 0
03-02 35° 50° 117 28 1 0 0
03-03 30° 44° 132 33 1 0 0
03-04 27° 45° 146 37 1 0 0
03-05 23° 49° 160 41 1 0 0
03-06 28° 35° 170 41 1 0 0
03-07 18° 46° 180 41 1 0 0
03-08 35° 61° 206 57 7 0 0
03-09 48° 58° 237 78 18 3 0
2020Lo
(F)
Hi
(F)
GDD
22
GDD
32
GDD
42
GDD
50
GDD
55
03-10 35° 53° 259 89 20 3 0
03-11 31° 41° 273 94 20 3 0
03-12 38° 53° 296 107 23 3 0
03-13 34° 49° 316 116 23 3 0
03-14 28° 37° 326 117 23 3 0
03-15 25° 43° 338 119 23 3 0
03-16 21° 44° 349 120 23 3 0
03-17 32° 48° 367 128 23 3 0
03-18 28° 45° 382 133 23 3 0
03-19 33° 51° 402 143 23 3 0
03-20 27° 61° 424 155 25 3 0
03-21 23° 33° 430 155 25 3 0
2020Lo
(F)
Hi
(F)
GDD
22
GDD
32
GDD
42
GDD
50
GDD
55
03-22 18° 38° 436 155 25 3 0
03-23 30° 39° 449 158 25 3 0
03-24 28° 44° 463 162 25 3 0
03-25 32° 56° 485 173 27 3 0
03-26 44° 53° 511 190 33 3 0
03-27 36° 51° 532 201 35 3 0
03-28 41° 49° 555 214 38 3 0
03-29 43° 57° 583 232 46 3 0
03-30 38° 43° 602 240 46 3 0
03-31 36° 41° 618 247 46 3 0
04-01 38° 48° 639 258 47 3 0
04-02 33° 60° 663 272 51 3 0
2020Lo
(F)
Hi
(F)
GDD
22
GDD
32
GDD
42
GDD
50
GDD
55
04-03 34° 63° 689 288 57 3 0
04-04 41° 55° 715 304 63 3 0
04-05 34° 54° 738 316 66 3 0
04-06 32° 62° 762 331 70 3 0
04-07 44° 73° 799 358 87 11 3
04-08 46° 65° 833 381 101 17 4
04-09 34° 47° 851 390 101 17 4
04-10 32° 41° 866 395 101 17 4
04-11 28° 57° 886 405 101 17 4
04-12 45° 61° 917 426 112 20 4
04-13 33° 54° 938 437 113 20 4
04-14 28° 38° 949 438 113 20 4
2020Lo
(F)
Hi
(F)
GDD
22
GDD
32
GDD
42
GDD
50
GDD
55
04-15 26° 35° 958 438 113 20 4
04-16 22° 40° 967 438 113 20 4
04-17 31° 37° 979 440 113 20 4
04-18 30° 54° 999 450 113 20 4
04-19 39° 59° 1026 467 120 20 4
04-20 29° 58° 1047 479 122 20 4
04-21 30° 47° 1064 486 122 20 4
04-22 24° 39° 1074 486 122 20 4
04-23 34° 44° 1091 493 122 20 4
04-24 38° 53° 1114 506 125 20 4
04-25 35° 55° 1137 519 128 20 4
04-26 42° 61° 1167 539 138 22 4
2020Lo
(F)
Hi
(F)
GDD
22
GDD
32
GDD
42
GDD
50
GDD
55
04-27 31° 62° 1191 553 142 22 4
04-28 43° 70° 1226 578 157 28 6
04-29 54° 62° 1262 604 173 36 9
04-30 44° 53° 1289 620 180 36 9
05-01 38° 65° 1318 640 189 38 9
05-02 52° 76° 1360 672 211 52 18
05-03 53° 71° 1400 702 231 64 25
05-04 37° 57° 1425 717 236 64 25
05-05 39° 52° 1449 731 240 64 25
05-06 33° 61° 1474 745 245 64 25
05-07 39° 61° 1502 764 253 64 25
05-08 31° 42° 1517 769 253 64 25
2020Lo
(F)
Hi
(F)
GDD
22
GDD
32
GDD
42
GDD
50
GDD
55
05-09 26° 51° 1533 775 253 64 25
05-10 38° 56° 1558 790 258 64 25
05-11 34° 46° 1576 798 258 64 25
05-12 31° 58° 1599 811 260 64 25
05-13 30° 62° 1623 825 265 64 25
05-14 47° 65° 1657 849 279 70 26
05-15 59° 72° 1700 882 302 85 36
05-16 51° 68° 1738 910 319 95 40
05-17 52° 57° 1770 932 332 100 40
05-18 55° 61° 1806 958 348 107 43
05-19 56° 64° 1844 986 366 118 48
05-20 54° 69° 1884 1016 386 129 55
2020Lo
(F)
Hi
(F)
GDD
22
GDD
32
GDD
42
GDD
50
GDD
55
05-21 53° 72° 1925 1047 406 142 63
05-22 60° 68° 1967 1079 428 156 72
05-23 59° 76° 2012 1114 454 173 84
05-24 63° 86° 2065 1157 486 198 104
05-25 64° 86° 2118 1200 520 223 124
05-26 65° 88° 2173 1245 554 250 146
05-27 67° 84° 2226 1288 588 276 166
05-28 69° 76° 2277 1329 618 298 184
05-29 58° 72° 2320 1362 641 313 194
05-30 53° 68° 2358 1390 660 323 199
05-31 41° 65° 2389 1411 671 327 199
06-01 43° 72° 2425 1437 687 335 202
2020Lo
(F)
Hi
(F)
GDD
22
GDD
32
GDD
42
GDD
50
GDD
55
06-02 61° 88° 2478 1480 720 359 222
06-03 67° 82° 2531 1523 753 384 242
06-04 59° 85° 2581 1563 783 406 259
06-05 58° 86° 2631 1603 813 428 276
06-06 60° 80° 2679 1641 841 448 291
06-07 52° 75° 2721 1673 862 462 299
06-08 55° 84° 2768 1710 890 481 314
06-09 60° 91° 2822 1754 923 507 334
06-10 66° 86° 2876 1798 957 533 356
06-11 59° 76° 2921 1833 983 550 368
06-12 54° 70° 2961 1863 1002 562 375
06-13 47° 66° 2996 1888 1017 569 377
2020Lo
(F)
Hi
(F)
GDD
22
GDD
32
GDD
42
GDD
50
GDD
55
06-14 43° 70° 3030 1912 1032 575 378
06-15 45° 77° 3069 1941 1050 586 384
06-16 52° 82° 3113 1975 1075 603 395
06-17 56° 84° 3161 2013 1103 622 410
06-18 55° 85° 3210 2052 1131 643 426
06-19 61° 89° 3263 2095 1164 668 446
06-20 64° 90° 3318 2140 1199 695 468
06-21 69° 83° 3371 2183 1233 721 488
06-22 64° 86° 3424 2226 1266 746 508
06-23 60° 70° 3468 2260 1289 761 519
06-24 56° 75° 3512 2293 1313 777 529
06-25 57° 80° 3558 2330 1340 795 543
2020Lo
(F)
Hi
(F)
GDD
22
GDD
32
GDD
42
GDD
50
GDD
55
06-26 57° 82° 3606 2368 1367 815 557
06-27 66° 85° 3659 2411 1401 840 578
06-28 60° 84° 3709 2451 1430 862 595
06-29 64° 86° 3762 2494 1463 887 615
06-30 66° 87° 3816 2538 1498 913 636
07-01 63° 87° 3870 2582 1531 939 657
07-02 64° 89° 3924 2626 1566 966 678
07-03 68° 91° 3982 2674 1604 995 703
07-04 69° 88° 4038 2720 1640 1023 726
07-05 63° 90° 4093 2765 1674 1050 748
07-06 68° 92° 4151 2813 1712 1080 772
07-07 67° 92° 4208 2860 1750 1109 797
2020Lo
(F)
Hi
(F)
GDD
22
GDD
32
GDD
42
GDD
50
GDD
55
07-08 68° 89° 4265 2907 1787 1138 821
07-09 69° 92° 4324 2956 1825 1169 847
07-10 69° 77° 4375 2997 1857 1192 865
07-11 62° 84° 4426 3038 1888 1215 883
07-12 61° 79° 4474 3076 1916 1235 898
07-13 58° 79° 4521 3113 1942 1254 912
07-14 58° 82° 4569 3151 1970 1274 927
07-15 66° 88° 4624 3196 2005 1301 949
07-16 67° 77° 4674 3236 2035 1323 966
07-17 61° 83° 4724 3276 2066 1345 983
07-18 65° 88° 4778 3320 2100 1372 1004
07-19 70° 81° 4832 3364 2133 1397 1025
2020Lo
(F)
Hi
(F)
GDD
22
GDD
32
GDD
42
GDD
50
GDD
55
07-20 66° 80° 4883 3405 2165 1420 1043
07-21 65° 80° 4933 3445 2195 1442 1060
07-22 70° 83° 4988 3490 2230 1469 1082
07-23 65° 81° 5039 3531 2260 1492 1100
07-24 59° 81° 5087 3569 2289 1512 1115
07-25 60° 86° 5138 3610 2320 1535 1133
07-26 67° 91° 5195 3657 2357 1564 1157
07-27 68° 86° 5250 3702 2392 1591 1179
07-28 63° 85° 5302 3744 2424 1615 1198
07-29 67° 86° 5357 3789 2458 1642 1220
07-30 61° 80° 5405 3827 2487 1663 1235
07-31 58° 80° 5453 3865 2514 1682 1249
2020Lo
(F)
Hi
(F)
GDD
22
GDD
32
GDD
42
GDD
50
GDD
55
08-01 60° 77° 5499 3901 2541 1700 1263
08-02 64° 75° 5546 3938 2568 1719 1277
08-03 63° 77° 5594 3976 2596 1739 1292
08-04 57° 70° 5635 4007 2617 1752 1300
08-05 50° 74° 5675 4037 2637 1765 1307
08-06 51° 77° 5717 4069 2659 1779 1316
08-07 51° 80° 5761 4103 2683 1794 1327
08-08 55° 83° 5808 4140 2710 1813 1341
08-09 67° 87° 5863 4185 2745 1840 1363
08-10 69° 89° 5920 4232 2782 1869 1387
08-11 65° 82° 5972 4274 2814 1893 1406
08-12 55° 85° 6020 4312 2841 1913 1421
2020Lo
(F)
Hi
(F)
GDD
22
GDD
32
GDD
42
GDD
50
GDD
55
08-13 56° 85° 6069 4350 2870 1934 1436
08-14 61° 86° 6120 4392 2902 1957 1455
08-15 63° 87° 6173 4435 2935 1982 1475
08-16 65° 81° 6224 4476 2966 2005 1493
08-17 59° 82° 6273 4515 2994 2026 1508
08-18 54° 75° 6315 4547 3017 2040 1518
08-19 50° 76° 6356 4578 3038 2053 1526
08-20 56° 83° 6404 4616 3065 2073 1540
08-21 61° 86° 6455 4657 3097 2096 1559
08-22 59° 87° 6506 4698 3128 2119 1577
08-23 62° 86° 6558 4740 3160 2143 1596
08-24 65° 90° 6614 4786 3196 2171 1619
2020Lo
(F)
Hi
(F)
GDD
22
GDD
32
GDD
42
GDD
50
GDD
55
08-25 70° 82° 6668 4830 3230 2197 1640
08-26 69° 89° 6725 4877 3267 2226 1664
08-27 74° 90° 6785 4927 3307 2258 1691
08-28 70° 82° 6839 4971 3341 2285 1712
08-29 62° 76° 6886 5008 3368 2304 1726
08-30 53° 71° 6926 5038 3388 2315 1733
08-31 55° 79° 6972 5073 3413 2333 1745
09-01 62° 79° 7020 5112 3442 2353 1761
09-02 60° 79° 7068 5150 3470 2373 1776
09-03 58° 84° 7117 5189 3499 2394 1792
09-04 51° 72° 7157 5219 3518 2406 1798
09-05 53° 76° 7199 5251 3541 2420 1808
2020Lo
(F)
Hi
(F)
GDD
22
GDD
32
GDD
42
GDD
50
GDD
55
09-06 47° 73° 7237 5279 3559 2430 1813
09-07 62° 79° 7286 5318 3587 2451 1829
09-08 55° 61° 7322 5344 3603 2459 1832
09-09 54° 62° 7358 5370 3619 2467 1834
09-10 53° 61° 7392 5394 3634 2473 1836
09-11 50° 67° 7429 5421 3651 2482 1840
09-12 55° 75° 7472 5454 3674 2497 1850
09-13 58° 70° 7515 5486 3696 2512 1859
09-14 49° 64° 7549 5511 3711 2518 1861
09-15 47° 71° 7586 5538 3728 2527 1865
09-16 54° 77° 7630 5572 3752 2543 1876
09-17 50° 65° 7666 5598 3768 2551 1879
2020Lo
(F)
Hi
(F)
GDD
22
GDD
32
GDD
42
GDD
50
GDD
55
09-18 41° 58° 7694 5616 3775 2551 1879
09-19 33° 62° 7719 5631 3781 2551 1879
09-20 38° 68° 7750 5652 3792 2554 1879
09-21 42° 72° 7785 5677 3807 2561 1881
09-22 47° 74° 7824 5706 3826 2572 1887
09-23 51° 78° 7867 5738 3848 2586 1896
09-24 55° 77° 7910 5772 3872 2602 1907
09-25 51° 80° 7954 5806 3895 2617 1917
09-26 58° 80° 8001 5843 3923 2637 1931
09-27 63° 72° 8046 5878 3948 2654 1944
09-28 51° 62° 8081 5902 3962 2660 1945
09-29 49° 63° 8114 5926 3976 2666 1946
2020Lo
(F)
Hi
(F)
GDD
22
GDD
32
GDD
42
GDD
50
GDD
55
09-30 48° 61° 8147 5949 3988 2670 1946

 

Latest Updates

February 19th, 2021Welcome to the 2021 GDD Tracking Season

Despite the frigid temperatures covering most of the country this week, GDDtracker started counting on February 15. As temperatures warm and snow fall melts the first two models that gather the most attention are the Proxy/Primo timer for scheduling annual bluegrass seedhead suppression applications and the crabgrass preemergence application timer. As the season progresses the early season DMI timer and the Smith-Kerns dollar spot prediction model gather views. Further information on all models can be found under the "About" tab at the top of the screen. Thanks for your continued use and support of GDDtracker and best wishes for a successful 2021 growing season!