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Crabgrass/Annual Bluegrass Preemergence Timer (GDD 32)
through Mon, Jul. 27. 2015

 
  

MI

       

Generously Supported By:



Tabular Data

Daily GDD accumulation for various base temperature models in 2014 & 2015

2015Lo
(F)
Hi
(F)
GDD
22
GDD
32
GDD
42
GDD
50
GDD
55
02-19 -22° 0 0 0 0 0
02-20 -25° 13° 0 0 0 0 0
02-21 11° 27° 0 0 0 0 0
02-22 -2° 23° 0 0 0 0 0
02-23 -21° 12° 0 0 0 0 0
02-24 27° 0 0 0 0 0
02-25 -5° 19° 0 0 0 0 0
02-26 -4° 13° 0 0 0 0 0
02-27 -21° 19° 0 0 0 0 0
02-28 -0° 20° 0 0 0 0 0
03-01 23° 25° 2 0 0 0 0
03-02 11° 29° 2 0 0 0 0
2015Lo
(F)
Hi
(F)
GDD
22
GDD
32
GDD
42
GDD
50
GDD
55
03-03 22° 33° 8 0 0 0 0
03-04 29° 8 0 0 0 0
03-05 -5° 17° 8 0 0 0 0
03-06 -9° 23° 8 0 0 0 0
03-07 39° 10 0 0 0 0
03-08 19° 38° 16 0 0 0 0
03-09 13° 42° 22 0 0 0 0
03-10 22° 41° 31 0 0 0 0
03-11 24° 45° 44 3 0 0 0
03-12 20° 44° 54 3 0 0 0
03-13 23° 46° 67 6 0 0 0
03-14 34° 42° 83 11 0 0 0
2015Lo
(F)
Hi
(F)
GDD
22
GDD
32
GDD
42
GDD
50
GDD
55
03-15 19° 46° 93 12 0 0 0
03-16 36° 60° 119 28 6 0 0
03-17 27° 44° 133 32 6 0 0
03-18 25° 45° 146 35 6 0 0
03-19 29° 41° 159 38 6 0 0
03-20 28° 51° 177 46 6 0 0
03-21 30° 47° 193 52 6 0 0
03-22 22° 37° 201 52 6 0 0
03-23 26° 36° 210 52 6 0 0
03-24 18° 44° 219 52 6 0 0
03-25 31° 40° 232 56 6 0 0
03-26 28° 39° 244 57 6 0 0
2015Lo
(F)
Hi
(F)
GDD
22
GDD
32
GDD
42
GDD
50
GDD
55
03-27 19° 30° 247 57 6 0 0
03-28 11° 36° 249 57 6 0 0
03-29 19° 43° 258 57 6 0 0
03-30 34° 55° 280 70 8 0 0
03-31 36° 51° 302 82 10 0 0
04-01 26° 67° 327 96 15 0 0
04-02 43° 57° 354 114 23 0 0
04-03 31° 52° 374 124 23 0 0
04-04 22° 53° 389 129 23 0 0
04-05 34° 56° 412 142 25 0 0
04-06 33° 65° 439 159 33 0 0
04-07 37° 50° 461 171 34 0 0
2015Lo
(F)
Hi
(F)
GDD
22
GDD
32
GDD
42
GDD
50
GDD
55
04-08 37° 43° 479 179 34 0 0
04-09 36° 60° 505 195 41 0 0
04-10 38° 61° 533 212 48 0 0
04-11 32° 59° 557 226 52 0 0
04-12 36° 70° 588 247 63 3 0
04-13 46° 63° 620 270 75 8 0
04-14 32° 68° 648 288 83 8 0
04-15 39° 67° 679 309 95 11 0
04-16 45° 64° 712 332 107 15 0
04-17 36° 77° 747 356 122 22 2
04-18 46° 73° 784 384 140 32 6
04-19 43° 70° 819 408 154 38 8
2015Lo
(F)
Hi
(F)
GDD
22
GDD
32
GDD
42
GDD
50
GDD
55
04-20 41° 55° 845 424 160 38 8
04-21 38° 45° 864 434 160 38 8
04-22 34° 39° 879 438 160 38 8
04-23 31° 45° 895 444 160 38 8
04-24 27° 59° 916 455 161 38 8
04-25 39° 56° 941 471 166 38 8
04-26 32° 62° 966 486 171 38 8
04-27 40° 55° 992 501 177 38 8
04-28 34° 63° 1018 518 183 38 8
04-29 39° 65° 1048 538 193 40 8
04-30 37° 64° 1077 556 202 40 8
05-01 41° 74° 1112 582 217 48 10
2015Lo
(F)
Hi
(F)
GDD
22
GDD
32
GDD
42
GDD
50
GDD
55
05-02 40° 75° 1148 607 233 55 13
05-03 50° 81° 1191 641 256 71 23
05-04 57° 76° 1236 675 281 88 35
05-05 49° 58° 1268 697 293 91 35
05-06 53° 77° 1311 730 316 106 45
05-07 58° 86° 1360 770 345 128 62
05-08 64° 84° 1412 812 377 152 81
05-09 62° 70° 1456 846 401 168 92
05-10 50° 60° 1489 869 414 173 92
05-11 49° 68° 1526 895 431 182 95
05-12 47° 54° 1554 914 439 182 95
05-13 38° 60° 1581 931 446 182 95
2015Lo
(F)
Hi
(F)
GDD
22
GDD
32
GDD
42
GDD
50
GDD
55
05-14 39° 68° 1613 952 458 185 95
05-15 51° 68° 1650 980 475 195 100
05-16 55° 78° 1695 1015 500 212 112
05-17 65° 80° 1745 1055 530 234 129
05-18 56° 85° 1794 1093 559 255 144
05-19 41° 54° 1819 1108 564 255 144
05-20 35° 58° 1843 1123 568 255 144
05-21 40° 66° 1874 1144 579 258 144
05-22 43° 69° 1909 1168 594 264 146
05-23 37° 79° 1945 1194 610 272 149
05-24 52° 75° 1987 1226 632 286 157
05-25 64° 78° 2036 1265 661 307 174
2015Lo
(F)
Hi
(F)
GDD
22
GDD
32
GDD
42
GDD
50
GDD
55
05-26 63° 82° 2086 1306 691 330 191
05-27 59° 72° 2130 1340 715 346 202
05-28 53° 83° 2177 1376 742 364 215
05-29 62° 86° 2229 1418 774 388 235
05-30 49° 70° 2266 1446 791 398 239
05-31 46° 61° 2298 1467 803 401 239
06-01 40° 69° 2330 1490 815 405 239
06-02 40° 72° 2364 1514 829 412 240
06-03 46° 78° 2404 1544 849 424 248
06-04 54° 83° 2451 1580 876 442 261
06-05 60° 71° 2494 1614 899 458 272
06-06 54° 73° 2536 1645 921 471 280
2015Lo
(F)
Hi
(F)
GDD
22
GDD
32
GDD
42
GDD
50
GDD
55
06-07 54° 79° 2581 1680 946 488 292
06-08 65° 83° 2633 1722 978 512 311
06-09 55° 81° 2679 1758 1004 530 324
06-10 65° 85° 2732 1801 1037 555 344
06-11 58° 74° 2776 1835 1061 571 355
06-12 56° 67° 2815 1865 1080 583 361
06-13 58° 71° 2858 1897 1103 597 371
06-14 68° 79° 2910 1939 1135 621 390
06-15 64° 79° 2959 1979 1164 642 406
06-16 62° 80° 3008 2018 1193 664 423
06-17 55° 80° 3054 2054 1219 681 435
06-18 64° 81° 3105 2094 1250 704 453
2015Lo
(F)
Hi
(F)
GDD
22
GDD
32
GDD
42
GDD
50
GDD
55
06-19 52° 74° 3146 2125 1271 717 461
06-20 51° 82° 3190 2160 1295 733 472
06-21 65° 84° 3243 2203 1328 758 492
06-22 61° 85° 3294 2243 1359 781 510
06-23 62° 79° 3343 2282 1388 802 526
06-24 51° 82° 3387 2317 1412 819 537
06-25 65° 76° 3436 2356 1441 839 553
06-26 59° 78° 3483 2392 1468 858 567
06-27 59° 77° 3529 2428 1494 876 580
06-28 51° 80° 3572 2462 1517 891 590
06-29 56° 76° 3616 2496 1541 907 601
06-30 55° 70° 3656 2526 1561 920 609
2015Lo
(F)
Hi
(F)
GDD
22
GDD
32
GDD
42
GDD
50
GDD
55
07-01 55° 68° 3696 2555 1581 931 615
07-02 52° 74° 3736 2586 1601 944 622
07-03 49° 77° 3777 2617 1622 957 631
07-04 51° 85° 3823 2653 1648 975 644
07-05 55° 85° 3872 2691 1677 995 659
07-06 61° 89° 3925 2734 1710 1020 679
07-07 58° 77° 3970 2770 1735 1037 691
07-08 50° 70° 4008 2798 1753 1047 696
07-09 59° 80° 4055 2835 1780 1067 711
07-10 55° 80° 4101 2870 1806 1084 723
07-11 54° 83° 4147 2907 1832 1103 737
07-12 65° 87° 4202 2951 1867 1129 758
2015Lo
(F)
Hi
(F)
GDD
22
GDD
32
GDD
42
GDD
50
GDD
55
07-13 64° 85° 4255 2994 1900 1154 778
07-14 66° 75° 4303 3033 1928 1174 793
07-15 56° 76° 4347 3067 1952 1191 804
07-16 53° 79° 4391 3101 1976 1207 815
07-17 64° 87° 4444 3144 2009 1232 836
07-18 68° 88° 4501 3190 2046 1260 859
07-19 70° 70° 4549 3228 2074 1280 874
07-20 62° 84° 4600 3269 2105 1303 892
07-21 61° 81° 4649 3309 2134 1324 908
07-22 56° 82° 4696 3346 2161 1343 922
07-23 59° 86° 4746 3386 2191 1366 940
07-24 60° 88° 4798 3428 2223 1390 959
2015Lo
(F)
Hi
(F)
GDD
22
GDD
32
GDD
42
GDD
50
GDD
55
07-25 67° 89° 4854 3474 2259 1418 982
07-26 59° 88° 4906 3516 2291 1442 1000
07-27 63° 90° 4961 3560 2326 1468 1022
07-28 64° 90° 5016 3606 2361 1495 1044
07-29 69° 84° 5071 3650 2396 1522 1066
07-30 62° 83° 5122 3691 2427 1545 1084
07-31 63° 84° 5173 3733 2458 1568 1102
08-01 63° 85° 5225 3775 2490 1592 1121
08-02 65° 81° 5276 3816 2521 1616 1140
08-03 60° 81° 5325 3854 2550 1636 1155
2014Lo
(F)
Hi
(F)
GDD
22
GDD
32
GDD
42
GDD
50
GDD
55
02-19 24° 40° 16 0 0 0 0
02-20 28° 37° 27 1 0 0 0
02-21 27° 39° 38 2 0 0 0
02-22 21° 29° 41 2 0 0 0
02-23 15° 24° 41 2 0 0 0
02-24 14° 21° 41 2 0 0 0
02-25 11° 21° 41 2 0 0 0
02-26 -1° 15° 41 2 0 0 0
02-27 -20° 16° 41 2 0 0 0
02-28 -23° 18° 41 2 0 0 0
03-01 12° 23° 41 2 0 0 0
03-02 -2° 14° 41 2 0 0 0
2014Lo
(F)
Hi
(F)
GDD
22
GDD
32
GDD
42
GDD
50
GDD
55
03-03 -20° 11° 41 2 0 0 0
03-04 -2° 20° 41 2 0 0 0
03-05 10° 21° 41 2 0 0 0
03-06 -1° 27° 41 2 0 0 0
03-07 41° 41 2 0 0 0
03-08 17° 36° 46 2 0 0 0
03-09 35° 46 2 0 0 0
03-10 32° 45° 62 9 0 0 0
03-11 32° 42° 77 14 0 0 0
03-12 10° 35° 78 14 0 0 0
03-13 -12° 27° 78 14 0 0 0
03-14 22° 45° 90 16 0 0 0
2014Lo
(F)
Hi
(F)
GDD
22
GDD
32
GDD
42
GDD
50
GDD
55
03-15 24° 37° 98 16 0 0 0
03-16 22° 98 16 0 0 0
03-17 -4° 30° 98 16 0 0 0
03-18 16° 41° 105 16 0 0 0
03-19 33° 39° 119 20 0 0 0
03-20 14° 36° 122 20 0 0 0
03-21 40° 125 20 0 0 0
03-22 18° 35° 130 20 0 0 0
03-23 25° 130 20 0 0 0
03-24 -3° 28° 130 20 0 0 0
03-25 11° 27° 130 20 0 0 0
03-26 -5° 30° 130 20 0 0 0
2014Lo
(F)
Hi
(F)
GDD
22
GDD
32
GDD
42
GDD
50
GDD
55
03-27 30° 40° 143 23 0 0 0
03-28 32° 45° 160 30 0 0 0
03-29 21° 38° 167 30 0 0 0
03-30 11° 42° 172 30 0 0 0
03-31 18° 48° 183 31 0 0 0
04-01 29° 43° 197 35 0 0 0
04-02 42° 201 35 0 0 0
04-03 32° 37° 213 37 0 0 0
04-04 32° 42° 228 42 0 0 0
04-05 29° 41° 241 45 0 0 0
04-06 31° 56° 262 57 2 0 0
04-07 32° 54° 283 68 2 0 0
2014Lo
(F)
Hi
(F)
GDD
22
GDD
32
GDD
42
GDD
50
GDD
55
04-08 36° 59° 309 83 8 0 0
04-09 31° 58° 331 95 10 0 0
04-10 45° 63° 363 117 22 4 0
04-11 30° 66° 389 134 28 4 0
04-12 40° 69° 422 156 41 9 0
04-13 48° 68° 458 182 57 17 3
04-14 27° 64° 481 196 61 17 3
04-15 24° 33° 488 196 61 17 3
04-16 26° 49° 503 201 61 17 3
04-17 33° 65° 531 219 68 17 3
04-18 41° 61° 560 238 77 18 3
04-19 30° 62° 584 252 81 18 3
2014Lo
(F)
Hi
(F)
GDD
22
GDD
32
GDD
42
GDD
50
GDD
55
04-20 39° 76° 619 277 96 25 5
04-21 54° 79° 663 311 120 41 16
04-22 38° 56° 688 326 126 41 16
04-23 29° 57° 709 337 127 41 16
04-24 40° 59° 737 355 134 41 16
04-25 40° 62° 766 374 143 42 16
04-26 37° 57° 791 389 148 42 16
04-27 38° 57° 816 404 154 42 16
04-28 42° 57° 844 422 161 42 16
04-29 44° 66° 877 445 174 47 16
04-30 46° 58° 907 465 184 49 16
05-01 38° 48° 928 476 185 49 16
2014Lo
(F)
Hi
(F)
GDD
22
GDD
32
GDD
42
GDD
50
GDD
55
05-02 44° 51° 953 491 191 49 16
05-03 45° 58° 983 511 200 51 16
05-04 43° 57° 1011 529 208 51 16
05-05 41° 58° 1038 546 216 51 16
05-06 39° 64° 1068 566 225 52 16
05-07 43° 59° 1096 584 234 53 16
05-08 50° 88° 1143 621 260 72 30
05-09 57° 77° 1188 656 285 89 42
05-10 48° 69° 1224 682 302 97 45
05-11 43° 84° 1266 714 323 110 54
05-12 58° 75° 1311 749 348 127 66
05-13 54° 76° 1353 781 371 142 75
2014Lo
(F)
Hi
(F)
GDD
22
GDD
32
GDD
42
GDD
50
GDD
55
05-14 49° 59° 1385 803 383 146 75
05-15 37° 47° 1406 814 383 146 75
05-16 33° 50° 1425 823 383 146 75
05-17 36° 58° 1450 838 388 146 75
05-18 42° 68° 1483 861 401 151 75
05-19 44° 73° 1519 887 417 159 79
05-20 54° 82° 1565 923 443 177 92
05-21 63° 84° 1617 965 475 201 110
05-22 53° 72° 1657 995 495 213 117
05-23 47° 73° 1695 1023 513 223 122
05-24 45° 79° 1735 1053 533 234 129
05-25 47° 83° 1778 1086 556 250 139
2014Lo
(F)
Hi
(F)
GDD
22
GDD
32
GDD
42
GDD
50
GDD
55
05-26 53° 85° 1825 1123 583 269 153
05-27 69° 82° 1879 1167 617 294 174
05-28 60° 72° 1922 1200 640 310 185
05-29 50° 79° 1965 1233 663 324 194
05-30 53° 85° 2012 1270 690 343 208
05-31 59° 88° 2063 1311 721 367 226
06-01 58° 91° 2116 1354 754 392 246
06-02 72° 84° 2172 1400 790 420 270
06-03 61° 75° 2219 1437 817 438 283
06-04 57° 72° 2261 1469 839 453 293
06-05 46° 80° 2303 1501 861 466 301
06-06 48° 82° 2346 1534 884 481 311
2014Lo
(F)
Hi
(F)
GDD
22
GDD
32
GDD
42
GDD
50
GDD
55
06-07 52° 87° 2393 1571 911 501 325
06-08 62° 79° 2442 1610 940 521 341
06-09 56° 82° 2489 1647 966 540 355
06-10 58° 79° 2535 1683 993 559 369
06-11 57° 75° 2580 1718 1018 575 380
06-12 61° 80° 2628 1756 1046 596 395
06-13 52° 66° 2665 1783 1063 605 399
06-14 43° 79° 2704 1812 1082 616 405
06-15 54° 84° 2751 1849 1109 634 419
06-16 68° 89° 2807 1895 1145 663 443
06-17 67° 87° 2863 1941 1180 690 465
06-18 66° 75° 2911 1979 1209 711 480
2014Lo
(F)
Hi
(F)
GDD
22
GDD
32
GDD
42
GDD
50
GDD
55
06-19 62° 79° 2960 2018 1238 732 496
06-20 60° 66° 3001 2049 1259 745 504
06-21 59° 81° 3049 2087 1287 765 519
06-22 63° 83° 3100 2128 1318 788 538
06-23 66° 77° 3150 2168 1348 809 554
06-24 68° 81° 3202 2210 1380 834 573
06-25 66° 75° 3250 2248 1408 854 588
06-26 60° 79° 3298 2286 1436 873 603
06-27 61° 88° 3350 2328 1468 898 622
06-28 66° 86° 3404 2372 1502 924 643
06-29 73° 87° 3462 2420 1540 954 668
06-30 74° 92° 3523 2471 1581 987 696
2014Lo
(F)
Hi
(F)
GDD
22
GDD
32
GDD
42
GDD
50
GDD
55
07-01 67° 83° 3576 2514 1614 1012 716
07-02 61° 69° 3619 2547 1637 1027 727
07-03 55° 77° 3663 2581 1661 1043 738
07-04 50° 80° 3707 2615 1684 1058 748
07-05 49° 81° 3750 2648 1708 1073 758
07-06 61° 83° 3800 2688 1738 1095 775
07-07 70° 86° 3856 2734 1774 1124 798
07-08 65° 74° 3903 2771 1801 1143 813
07-09 60° 73° 3948 2806 1826 1160 824
07-10 53° 78° 3991 2839 1849 1175 834
07-11 53° 83° 4037 2875 1875 1193 848
07-12 60° 84° 4087 2915 1905 1215 864
2014Lo
(F)
Hi
(F)
GDD
22
GDD
32
GDD
42
GDD
50
GDD
55
07-13 68° 79° 4139 2957 1937 1239 883
07-14 59° 80° 4187 2995 1965 1259 898
07-15 56° 65° 4225 3023 1983 1269 903
07-16 53° 70° 4265 3053 2002 1280 910
07-17 47° 77° 4305 3083 2023 1292 917
07-18 49° 81° 4347 3115 2045 1307 927
07-19 54° 82° 4394 3152 2072 1325 940
07-20 59° 85° 4443 3191 2101 1347 957
07-21 58° 89° 4495 3233 2133 1370 975
07-22 64° 92° 4551 3279 2169 1398 998
07-23 59° 74° 4595 3313 2193 1415 1010
07-24 53° 76° 4638 3346 2216 1430 1019
2014Lo
(F)
Hi
(F)
GDD
22
GDD
32
GDD
42
GDD
50
GDD
55
07-25 49° 78° 4680 3378 2238 1443 1028
07-26 58° 79° 4726 3414 2264 1462 1041
07-27 59° 84° 4776 3454 2294 1483 1058
07-28 53° 68° 4815 3483 2313 1494 1064
07-29 50° 74° 4855 3513 2332 1506 1071
07-30 53° 78° 4898 3546 2356 1522 1081
07-31 52° 82° 4943 3581 2381 1539 1094
08-01 57° 83° 4992 3620 2409 1559 1109
08-02 55° 83° 5039 3657 2436 1578 1123
08-03 54° 88° 5088 3696 2466 1600 1139
08-04 62° 83° 5139 3737 2497 1622 1157
08-05 66° 78° 5189 3777 2527 1644 1174
2014Lo
(F)
Hi
(F)
GDD
22
GDD
32
GDD
42
GDD
50
GDD
55
08-06 59° 82° 5238 3816 2555 1665 1190
08-07 55° 84° 5285 3853 2583 1685 1204
08-08 58° 83° 5333 3891 2611 1705 1220
08-09 54° 82° 5380 3928 2638 1723 1233
08-10 58° 86° 5430 3968 2667 1745 1250
08-11 67° 79° 5480 4008 2698 1768 1268
08-12 58° 67° 5521 4039 2719 1780 1275
08-13 51° 78° 5563 4071 2741 1795 1285
08-14 48° 74° 5602 4100 2760 1806 1291
08-15 44° 77° 5641 4129 2779 1816 1296
08-16 53° 81° 5685 4163 2803 1833 1308
08-17 65° 76° 5734 4202 2832 1853 1323
2014Lo
(F)
Hi
(F)
GDD
22
GDD
32
GDD
42
GDD
50
GDD
55
08-18 58° 82° 5781 4239 2859 1873 1338
08-19 65° 76° 5830 4278 2888 1893 1353
08-20 65° 80° 5880 4318 2918 1916 1370
08-21 62° 78° 5928 4356 2946 1936 1385
08-22 67° 80° 5980 4398 2978 1960 1404
08-23 64° 84° 6032 4440 3010 1984 1424
08-24 65° 84° 6085 4483 3043 2009 1443
08-25 67° 83° 6138 4526 3076 2033 1463
08-26 64° 81° 6188 4566 3106 2056 1480
08-27 57° 80° 6234 4602 3132 2074 1493
08-28 50° 76° 6275 4633 3153 2087 1502
08-29 62° 77° 6323 4671 3181 2106 1516
2014Lo
(F)
Hi
(F)
GDD
22
GDD
32
GDD
42
GDD
50
GDD
55
08-30 70° 80° 6376 4714 3214 2131 1536
08-31 66° 84° 6429 4757 3247 2156 1556
09-01 64° 82° 6480 4798 3278 2180 1574
09-02 62° 83° 6531 4839 3309 2202 1592
09-03 55° 85° 6579 4877 3337 2222 1607
09-04 62° 82° 6629 4917 3366 2244 1624
09-05 66° 82° 6680 4958 3398 2268 1642
09-06 56° 76° 6725 4993 3423 2284 1654
09-07 48° 78° 6766 5024 3444 2298 1662
09-08 51° 79° 6809 5057 3467 2313 1673
09-09 56° 82° 6856 5094 3494 2332 1686
09-10 58° 76° 6901 5129 3519 2349 1698
2014Lo
(F)
Hi
(F)
GDD
22
GDD
32
GDD
42
GDD
50
GDD
55
09-11 50° 57° 6933 5151 3531 2353 1698
09-12 48° 55° 6962 5170 3540 2354 1698
09-13 46° 58° 6992 5190 3550 2356 1698
09-14 41° 62° 7022 5210 3560 2358 1698
09-15 43° 63° 7054 5232 3572 2361 1698
09-16 42° 66° 7086 5254 3584 2365 1698
09-17 37° 65° 7115 5273 3592 2366 1698
09-18 42° 64° 7146 5294 3604 2369 1698
09-19 44° 72° 7182 5320 3619 2377 1701
09-20 57° 76° 7227 5355 3644 2394 1713
09-21 47° 65° 7261 5379 3659 2400 1714
09-22 39° 64° 7290 5398 3668 2402 1714
2014Lo
(F)
Hi
(F)
GDD
22
GDD
32
GDD
42
GDD
50
GDD
55
09-23 42° 74° 7326 5424 3684 2410 1717
09-24 45° 76° 7365 5453 3703 2421 1723
09-25 46° 79° 7406 5484 3723 2433 1731
09-26 48° 78° 7446 5514 3744 2446 1739
09-27 49° 79° 7488 5546 3766 2460 1747
09-28 51° 78° 7531 5579 3789 2474 1757
09-29 47° 81° 7572 5610 3810 2488 1766
09-30 49° 57° 7603 5631 3821 2491 1766

 

Latest Updates

May 4th, 2015Early Season DMI Sprays Happening Now

The DMI timer has been sprinting across the Midwest region. Finally a string of warm weather has triggers alerts across Illinois and Ohio and closing in on Michigan.
 

March 23rd, 2015Crabgrass PRE Indicators Moving North

Last week started with a bang, but was mostly mild and steady. Evening winds helped things dry out here and there. Most accumulations are on pace with 2014 or slightly ahead now. Snow in Chicago today is a reminder that March is not over. Sign up for you automatic alerts using the link above.
 

March 16th, 2015Melting Snow, Clear Skies

What a difference a week makes. I think we can see spring from here. As the weather forecast from last week indicated, we made up for lost time across the Midwest last week. Most models are at or ahead of last year after being behind.
 

March 16th, 2015Mapping and Forecast Functions Restored

Well, that was fun. After a little bit of lost sleep (OK, actually several nights) the mapping and forecast functions have been restored. Thanks to the GDDTracker technical team for sticking with it to get this fixed.
 

March 10th, 2015Follow GDDTracker on Twitter.

We will be providing periodic updates and comments this spring via Twitter. If you would like to be part of that conversation, give us a follow @gddtracker.
 

March 9th, 2015Spring is on the way (we hope).

GDDTracker is reset for 2015. Although it's been abnormally cold for most the region it looks like things will warm up for most of this week and start melting some snow. Over the winter the NWS upgraded their forecast resolution (which is great), however, this is playing havoc with our mapping formulas. We are re-writing the code so we can properly provide forecasts by zip code. Stay tuned, hope to have this fixed soon.
 

March 2nd, 2014Ready, Set... Reset, Go!

The GDD totals were mistakenly reset on Jan 3rd instead of Feb 15th. This has been corrected. Some alerts may be resent due to the change. Thank you!
 

April 9th, 2013GDDTracker Expands Coverage

With initial funding provided by the Michigan State University and the Michigan Turfgrass Foundation, GDDTracker has been helping turf managers schedule Poa annua seedhead suppression applications throughout the Great Lakes states since 2004. Over the last couple years we've been considering several strategies for expanding the geographical reach of GDDTracker beyond our base region. After much consideration we have decided to expand coverage from Colorado to the atlantic coast. Historically the models we've used to schedule PGR applications to suppress Poa seedheads in our region have been successful but as we move outside of our immediate comfort zone users should keep in mind that the ultimate combination of personal observations, experience, and GDD models should all be considered when scheduling applications. Although GDDTracker started as a guide for scheduling PGR applications for Poa seedhead suppression, over the years we have added models for crabgrass preemergence, spring broadleaf, and others. As GDDTracker grows we will continue to move forward with additional models. We hope you find GDDTracker useful for your operation and as always your feedback is always encouraged.