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Crabgrass/Annual Bluegrass Preemergence Timer (GDD 32)
through Tue, Jun. 18. 2019

 

GDD Total: 1878 (Base 32) through Tue, Jun. 18, 2019

  

Grand Rapids, MI

       

Forecast »

Done

801

Late

500

Optimum

250

Early

171

Under

0

 

Generously Supported By:



Tabular Data

Daily GDD accumulation for various base temperature models in 2018 & 2019

2019Lo
(F)
Hi
(F)
GDD
22
GDD
32
GDD
42
GDD
50
GDD
55
02-15 19° 37° 6 0 0 0 0
02-16 17° 28° 7 0 0 0 0
02-17 15° 24° 7 0 0 0 0
02-18 14° 27° 7 0 0 0 0
02-19 28° 7 0 0 0 0
02-20 19° 35° 12 0 0 0 0
02-21 22° 35° 18 0 0 0 0
02-22 12° 36° 21 0 0 0 0
02-23 26° 37° 30 0 0 0 0
02-24 22° 44° 41 1 0 0 0
02-25 12° 20° 41 1 0 0 0
02-26 11° 19° 41 1 0 0 0
2019Lo
(F)
Hi
(F)
GDD
22
GDD
32
GDD
42
GDD
50
GDD
55
02-27 15° 25° 41 1 0 0 0
02-28 16° 27° 41 1 0 0 0
03-01 13° 32° 42 1 0 0 0
03-02 18° 31° 45 1 0 0 0
03-03 11° 21° 45 1 0 0 0
03-04 12° 45 1 0 0 0
03-05 11° 17° 45 1 0 0 0
03-06 23° 45 1 0 0 0
03-07 25° 45 1 0 0 0
03-08 35° 45 1 0 0 0
03-09 15° 37° 49 1 0 0 0
03-10 34° 39° 63 5 0 0 0
2019Lo
(F)
Hi
(F)
GDD
22
GDD
32
GDD
42
GDD
50
GDD
55
03-11 22° 33° 69 5 0 0 0
03-12 10° 42° 73 5 0 0 0
03-13 35° 44° 90 13 0 0 0
03-14 42° 57° 117 30 7 0 0
03-15 33° 40° 132 35 7 0 0
03-16 24° 34° 139 35 7 0 0
03-17 20° 38° 147 35 7 0 0
03-18 21° 41° 156 35 7 0 0
03-19 24° 45° 168 37 7 0 0
03-20 33° 41° 183 42 7 0 0
03-21 34° 41° 198 47 7 0 0
03-22 28° 40° 210 49 7 0 0
2019Lo
(F)
Hi
(F)
GDD
22
GDD
32
GDD
42
GDD
50
GDD
55
03-23 20° 45° 221 50 7 0 0
03-24 31° 52° 241 60 7 0 0
03-25 28° 45° 255 65 7 0 0
03-26 21° 46° 267 66 7 0 0
03-27 25° 53° 284 73 7 0 0
03-28 44° 59° 314 93 17 2 0
03-29 37° 55° 338 107 21 2 0
03-30 28° 45° 352 111 21 2 0
03-31 23° 32° 357 111 21 2 0
04-01 20° 42° 367 111 21 2 0
04-02 39° 54° 391 125 25 2 0
04-03 35° 49° 411 136 25 2 0
2019Lo
(F)
Hi
(F)
GDD
22
GDD
32
GDD
42
GDD
50
GDD
55
04-04 33° 46° 429 143 25 2 0
04-05 34° 55° 451 155 28 2 0
04-06 34° 63° 478 172 35 2 0
04-07 48° 71° 516 200 53 12 5
04-08 51° 64° 551 226 68 19 8
04-09 42° 59° 580 244 77 20 8
04-10 34° 42° 596 251 77 20 8
04-11 31° 46° 612 257 77 20 8
04-12 38° 50° 635 269 79 20 8
04-13 35° 44° 652 277 79 20 8
04-14 32° 37° 665 279 79 20 8
04-15 30° 48° 682 286 79 20 8
2019Lo
(F)
Hi
(F)
GDD
22
GDD
32
GDD
42
GDD
50
GDD
55
04-16 37° 61° 709 303 86 20 8
04-17 41° 59° 737 322 94 20 8
04-18 41° 62° 767 341 104 22 8
04-19 39° 52° 790 355 108 22 8
04-20 36° 69° 821 376 118 24 8
04-21 40° 73° 856 401 133 31 10
04-22 52° 78° 899 434 157 46 20
04-23 44° 68° 933 458 171 53 21
04-24 32° 64° 959 474 177 53 21
04-25 42° 70° 993 498 191 59 22
04-26 44° 59° 1023 518 201 61 22
04-27 33° 46° 1041 525 201 61 22
2019Lo
(F)
Hi
(F)
GDD
22
GDD
32
GDD
42
GDD
50
GDD
55
04-28 31° 56° 1062 537 202 61 22
04-29 40° 45° 1083 547 203 61 22
04-30 42° 44° 1104 558 204 61 22
05-01 43° 52° 1130 574 210 61 22
05-02 42° 48° 1153 588 213 61 22
05-03 46° 55° 1182 606 222 61 22
05-04 40° 65° 1212 627 232 64 22
05-05 39° 70° 1245 649 245 68 22
05-06 53° 63° 1280 675 260 76 25
05-07 46° 59° 1311 695 271 78 25
05-08 42° 58° 1339 713 279 78 25
05-09 49° 70° 1376 741 296 88 30
2019Lo
(F)
Hi
(F)
GDD
22
GDD
32
GDD
42
GDD
50
GDD
55
05-10 41° 54° 1402 757 302 88 30
05-11 36° 54° 1425 770 305 88 30
05-12 44° 56° 1453 788 313 88 30
05-13 46° 58° 1483 808 323 90 30
05-14 36° 67° 1513 828 333 92 30
05-15 46° 71° 1549 854 349 100 33
05-16 50° 73° 1589 883 369 112 39
05-17 56° 69° 1629 914 389 124 46
05-18 53° 76° 1672 946 412 139 56
05-19 56° 70° 1713 978 433 152 65
05-20 45° 54° 1741 995 441 152 65
05-21 40° 61° 1770 1014 450 153 65
2019Lo
(F)
Hi
(F)
GDD
22
GDD
32
GDD
42
GDD
50
GDD
55
05-22 50° 76° 1811 1045 471 166 73
05-23 57° 70° 1853 1077 493 180 82
05-24 50° 63° 1887 1101 507 186 83
05-25 60° 74° 1932 1137 532 203 95
05-26 60° 74° 1977 1171 557 220 107
05-27 50° 74° 2017 1201 577 232 114
05-28 57° 61° 2054 1228 594 241 118
05-29 55° 66° 2092 1257 612 251 123
05-30 53° 66° 2130 1284 630 261 128
05-31 49° 79° 2172 1316 652 275 137
06-01 58° 70° 2214 1348 674 289 145
06-02 50° 67° 2250 1375 690 297 149
2019Lo
(F)
Hi
(F)
GDD
22
GDD
32
GDD
42
GDD
50
GDD
55
06-03 41° 67° 2282 1396 702 301 149
06-04 47° 75° 2321 1425 721 312 155
06-05 62° 76° 2368 1463 748 332 169
06-06 60° 79° 2416 1500 776 351 184
06-07 56° 83° 2463 1538 803 371 199
06-08 56° 82° 2511 1575 831 390 213
06-09 62° 69° 2555 1609 855 406 224
06-10 54° 67° 2593 1638 873 416 229
06-11 48° 76° 2633 1668 893 428 236
06-12 59° 70° 2676 1700 916 443 246
06-13 51° 62° 2710 1725 930 450 247
06-14 45° 70° 2746 1751 946 457 250
2019Lo
(F)
Hi
(F)
GDD
22
GDD
32
GDD
42
GDD
50
GDD
55
06-15 61° 72° 2790 1785 970 474 262
06-16 57° 62° 2828 1812 988 483 266
06-17 55° 70° 2868 1843 1008 495 273
06-18 56° 78° 2913 1878 1033 512 285
06-19 60° 74° 2958 1913 1058 529 297
06-20 58° 71° 3001 1945 1081 544 307
06-21 53° 76° 3043 1978 1103 559 316
06-22 60° 76° 3089 2014 1129 577 329
06-23 63° 78° 3138 2052 1158 597 345
06-24 62° 77° 3186 2090 1186 617 360
06-25 60° 77° 3232 2127 1212 636 373
2018Lo
(F)
Hi
(F)
GDD
22
GDD
32
GDD
42
GDD
50
GDD
55
02-15 35° 40° 16 6 0 0 0
02-16 20° 35° 21 6 0 0 0
02-17 18° 32° 25 6 0 0 0
02-18 26° 39° 35 6 0 0 0
02-19 35° 48° 55 16 0 0 0
02-20 39° 60° 82 33 8 0 0
02-21 26° 37° 92 33 8 0 0
02-22 25° 38° 101 33 8 0 0
02-23 32° 42° 117 39 8 0 0
02-24 31° 41° 131 43 8 0 0
02-25 33° 44° 147 49 8 0 0
02-26 28° 49° 164 55 8 0 0
2018Lo
(F)
Hi
(F)
GDD
22
GDD
32
GDD
42
GDD
50
GDD
55
02-27 35° 58° 188 70 12 0 0
02-28 40° 57° 215 87 19 0 0
03-01 32° 41° 230 91 19 0 0
03-02 26° 44° 242 94 19 0 0
03-03 24° 44° 254 96 19 0 0
03-04 26° 43° 267 99 19 0 0
03-05 26° 37° 276 99 19 0 0
03-06 28° 36° 286 99 19 0 0
03-07 24° 31° 292 99 19 0 0
03-08 21° 30° 296 99 19 0 0
03-09 23° 34° 302 99 19 0 0
03-10 17° 36° 306 99 19 0 0
2018Lo
(F)
Hi
(F)
GDD
22
GDD
32
GDD
42
GDD
50
GDD
55
03-11 19° 39° 314 99 19 0 0
03-12 26° 38° 324 99 19 0 0
03-13 25° 31° 330 99 19 0 0
03-14 22° 38° 337 99 19 0 0
03-15 24° 35° 345 99 19 0 0
03-16 21° 40° 353 99 19 0 0
03-17 21° 51° 367 103 19 0 0
03-18 26° 54° 385 110 19 0 0
03-19 25° 44° 398 113 19 0 0
03-20 22° 39° 406 113 19 0 0
03-21 24° 41° 417 114 19 0 0
03-22 22° 44° 428 115 19 0 0
2018Lo
(F)
Hi
(F)
GDD
22
GDD
32
GDD
42
GDD
50
GDD
55
03-23 22° 45° 440 117 19 0 0
03-24 25° 40° 451 118 19 0 0
03-25 22° 41° 460 118 19 0 0
03-26 26° 55° 479 126 19 0 0
03-27 41° 49° 502 139 22 0 0
03-28 36° 50° 523 150 23 0 0
03-29 37° 51° 545 162 25 0 0
03-30 30° 45° 560 167 25 0 0
03-31 32° 45° 576 174 25 0 0
04-01 25° 33° 584 174 25 0 0
04-02 18° 42° 591 174 25 0 0
04-03 33° 37° 604 177 25 0 0
2018Lo
(F)
Hi
(F)
GDD
22
GDD
32
GDD
42
GDD
50
GDD
55
04-04 24° 33° 611 177 25 0 0
04-05 20° 37° 617 177 25 0 0
04-06 27° 35° 626 177 25 0 0
04-07 21° 29° 629 177 25 0 0
04-08 16° 38° 634 177 25 0 0
04-09 29° 39° 646 179 25 0 0
04-10 22° 43° 657 180 25 0 0
04-11 35° 53° 679 191 26 0 0
04-12 44° 64° 711 213 38 4 0
04-13 37° 44° 729 222 38 4 0
04-14 28° 38° 740 223 38 4 0
04-15 28° 34° 749 223 38 4 0
2018Lo
(F)
Hi
(F)
GDD
22
GDD
32
GDD
42
GDD
50
GDD
55
04-16 30° 33° 759 223 38 4 0
04-17 26° 33° 767 223 38 4 0
04-18 30° 41° 780 226 38 4 0
04-19 30° 51° 799 235 38 4 0
04-20 30° 59° 821 248 41 4 0
04-21 31° 59° 844 261 44 4 0
04-22 32° 65° 871 277 50 4 0
04-23 39° 73° 904 301 64 10 1
04-24 54° 62° 941 327 80 18 4
04-25 43° 59° 969 346 89 19 4
04-26 31° 62° 994 360 94 19 4
04-27 41° 57° 1021 378 101 19 4
2018Lo
(F)
Hi
(F)
GDD
22
GDD
32
GDD
42
GDD
50
GDD
55
04-28 35° 54° 1044 390 103 19 4
04-29 25° 59° 1064 400 103 19 4
04-30 28° 73° 1093 419 112 20 4
05-01 60° 83° 1142 458 142 41 21
05-02 66° 82° 1194 500 174 65 39
05-03 60° 68° 1235 532 195 79 48
05-04 51° 66° 1272 558 212 87 51
05-05 52° 80° 1316 592 236 103 62
05-06 51° 67° 1353 619 253 112 66
05-07 44° 72° 1389 646 269 120 70
05-08 53° 79° 1433 679 293 136 80
05-09 56° 79° 1478 715 318 153 93
2018Lo
(F)
Hi
(F)
GDD
22
GDD
32
GDD
42
GDD
50
GDD
55
05-10 54° 66° 1516 743 336 163 98
05-11 40° 50° 1539 756 339 163 98
05-12 41° 57° 1566 773 346 163 98
05-13 47° 64° 1600 796 359 169 98
05-14 51° 70° 1638 825 378 179 104
05-15 59° 76° 1684 860 404 197 116
05-16 52° 79° 1727 894 427 212 127
05-17 50° 80° 1771 927 450 227 137
05-18 50° 77° 1812 958 472 241 145
05-19 55° 64° 1849 986 489 250 149
05-20 50° 61° 1883 1009 503 256 150
05-21 49° 59° 1915 1032 515 260 150
2018Lo
(F)
Hi
(F)
GDD
22
GDD
32
GDD
42
GDD
50
GDD
55
05-22 52° 64° 1951 1058 531 268 153
05-23 48° 78° 1992 1089 552 281 161
05-24 52° 83° 2038 1124 577 298 174
05-25 63° 86° 2090 1167 610 323 193
05-26 69° 84° 2144 1211 644 349 214
05-27 62° 92° 2200 1256 679 377 237
05-28 65° 94° 2257 1304 717 406 261
05-29 69° 93° 2316 1353 756 437 287
05-30 70° 88° 2373 1400 793 466 311
05-31 72° 85° 2430 1446 829 495 335
06-01 66° 83° 2482 1489 862 519 354
06-02 57° 69° 2523 1520 883 532 362
2018Lo
(F)
Hi
(F)
GDD
22
GDD
32
GDD
42
GDD
50
GDD
55
06-03 59° 71° 2566 1553 906 547 372
06-04 54° 71° 2607 1583 927 560 380
06-05 56° 69° 2647 1614 947 572 387
06-06 46° 70° 2683 1640 963 580 390
06-07 54° 81° 2729 1675 989 598 403
06-08 59° 81° 2777 1714 1017 618 418
06-09 61° 71° 2821 1747 1041 634 429
06-10 59° 67° 2862 1778 1061 647 437
06-11 57° 80° 2909 1815 1088 665 451
06-12 60° 79° 2956 1853 1116 685 465
06-13 61° 78° 3004 1890 1144 705 480
06-14 56° 83° 3051 1928 1171 724 494
2018Lo
(F)
Hi
(F)
GDD
22
GDD
32
GDD
42
GDD
50
GDD
55
06-15 58° 83° 3099 1966 1199 744 509
06-16 67° 82° 3152 2008 1232 769 529
06-17 71° 92° 3212 2058 1271 801 556
06-18 74° 88° 3271 2107 1310 831 582
06-19 68° 73° 3319 2146 1339 852 597
06-20 61° 74° 3365 2181 1364 870 610
06-21 59° 75° 3409 2216 1389 886 621
06-22 58° 74° 3453 2250 1413 902 632
06-23 62° 73° 3499 2285 1438 920 645
06-24 62° 75° 3545 2321 1465 938 658
06-25 58° 77° 3591 2357 1490 956 671
06-26 55° 80° 3637 2393 1516 973 684
2018Lo
(F)
Hi
(F)
GDD
22
GDD
32
GDD
42
GDD
50
GDD
55
06-27 65° 78° 3686 2433 1546 995 700
06-28 60° 83° 3736 2472 1575 1016 717
06-29 64° 93° 3792 2518 1612 1045 740
06-30 79° 93° 3856 2573 1656 1081 771
07-01 75° 94° 3919 2625 1699 1116 801
07-02 69° 84° 3973 2669 1733 1142 822
07-03 61° 92° 4027 2714 1767 1168 843
07-04 73° 92° 4088 2765 1808 1201 871
07-05 75° 90° 4149 2815 1848 1233 899
07-06 60° 79° 4196 2853 1876 1253 913
07-07 54° 82° 4242 2888 1902 1271 926
07-08 55° 85° 4290 2927 1930 1291 941
2018Lo
(F)
Hi
(F)
GDD
22
GDD
32
GDD
42
GDD
50
GDD
55
07-09 59° 85° 4340 2966 1960 1313 958
07-10 70° 88° 4397 3013 1997 1342 982
07-11 61° 85° 4448 3054 2027 1365 1000
07-12 60° 83° 4498 3094 2057 1386 1017
07-13 68° 88° 4554 3140 2094 1415 1040
07-14 72° 80° 4608 3184 2128 1441 1061
07-15 65° 90° 4663 3230 2163 1468 1083
07-16 70° 89° 4721 3277 2201 1498 1108
07-17 62° 80° 4770 3316 2229 1518 1124
07-18 53° 80° 4814 3350 2253 1535 1135
07-19 55° 86° 4862 3388 2282 1555 1150
07-20 68° 84° 4916 3432 2315 1581 1171
2018Lo
(F)
Hi
(F)
GDD
22
GDD
32
GDD
42
GDD
50
GDD
55
07-21 66° 75° 4964 3471 2344 1601 1186
07-22 67° 75° 5013 3510 2373 1622 1202
07-23 66° 73° 5061 3547 2401 1642 1217
07-24 66° 84° 5114 3590 2434 1667 1237
07-25 64° 86° 5167 3633 2466 1691 1257
07-26 65° 78° 5216 3673 2496 1713 1273
07-27 58° 72° 5259 3706 2519 1728 1283
07-28 55° 78° 5304 3740 2544 1745 1295
07-29 54° 79° 5349 3775 2568 1762 1307
07-30 57° 82° 5396 3813 2596 1781 1321
07-31 59° 79° 5443 3850 2623 1800 1335
08-01 64° 83° 5494 3891 2654 1823 1353
2018Lo
(F)
Hi
(F)
GDD
22
GDD
32
GDD
42
GDD
50
GDD
55
08-02 65° 84° 5547 3933 2687 1848 1373
08-03 62° 84° 5597 3974 2717 1870 1390
08-04 59° 92° 5651 4017 2751 1896 1411
08-05 72° 90° 5710 4066 2790 1927 1437
08-06 69° 80° 5763 4109 2822 1952 1457
08-07 65° 83° 5815 4151 2854 1976 1476
08-08 66° 83° 5867 4194 2887 2000 1495
08-09 65° 84° 5920 4236 2919 2025 1515
08-10 64° 84° 5972 4278 2952 2049 1534
08-11 59° 87° 6023 4319 2983 2072 1552
08-12 61° 87° 6075 4362 3015 2096 1571
08-13 62° 87° 6128 4404 3048 2121 1591
2018Lo
(F)
Hi
(F)
GDD
22
GDD
32
GDD
42
GDD
50
GDD
55
08-14 60° 89° 6180 4447 3080 2145 1610
08-15 65° 88° 6235 4491 3114 2172 1632
08-16 67° 85° 6289 4535 3148 2197 1653
08-17 68° 78° 6340 4576 3180 2221 1671
08-18 64° 83° 6391 4618 3211 2244 1689
08-19 65° 83° 6443 4660 3243 2268 1708
08-20 64° 80° 6493 4700 3273 2290 1725
08-21 65° 78° 6542 4739 3302 2311 1741
08-22 55° 77° 6587 4773 3326 2328 1753
08-23 53° 80° 6631 4807 3351 2344 1764
08-24 56° 77° 6676 4842 3375 2360 1776
08-25 64° 76° 6723 4880 3403 2380 1790
2018Lo
(F)
Hi
(F)
GDD
22
GDD
32
GDD
42
GDD
50
GDD
55
08-26 68° 88° 6779 4926 3439 2408 1813
08-27 68° 87° 6835 4972 3475 2436 1836
08-28 66° 86° 6889 5016 3509 2462 1857
08-29 58° 71° 6932 5049 3532 2477 1867
08-30 50° 72° 6971 5078 3551 2488 1873
08-31 55° 81° 7018 5114 3577 2507 1887
09-01 69° 78° 7069 5156 3609 2530 1905
09-02 69° 85° 7124 5201 3644 2557 1927
09-03 69° 78° 7176 5242 3676 2581 1946
09-04 69° 88° 7233 5289 3712 2609 1970
09-05 70° 87° 7289 5335 3749 2638 1993
09-06 60° 71° 7333 5369 3772 2654 2004
2018Lo
(F)
Hi
(F)
GDD
22
GDD
32
GDD
42
GDD
50
GDD
55
09-07 55° 68° 7372 5399 3792 2665 2010
09-08 55° 69° 7412 5429 3812 2677 2017
09-09 52° 67° 7450 5456 3830 2687 2022
09-10 54° 72° 7491 5487 3851 2700 2030
09-11 51° 75° 7532 5519 3872 2713 2038
09-12 54° 80° 7577 5553 3897 2730 2050
09-13 54° 77° 7621 5587 3921 2746 2061
09-14 57° 81° 7668 5625 3948 2765 2075
09-15 56° 82° 7716 5662 3975 2784 2090
09-16 64° 86° 7768 5705 4008 2809 2109
09-17 62° 87° 7821 5748 4041 2834 2129
09-18 63° 79° 7870 5787 4070 2855 2145
2018Lo
(F)
Hi
(F)
GDD
22
GDD
32
GDD
42
GDD
50
GDD
55
09-19 56° 76° 7914 5821 4094 2871 2156
09-20 64° 82° 7965 5862 4125 2894 2174
09-21 56° 78° 8011 5897 4151 2912 2187
09-22 45° 64° 8043 5920 4163 2916 2187
09-23 44° 70° 8078 5945 4178 2923 2189
09-24 50° 72° 8117 5974 4197 2934 2195
09-25 65° 78° 8167 6013 4227 2956 2211
09-26 48° 65° 8202 6038 4242 2963 2213
09-27 47° 65° 8236 6062 4256 2969 2214
09-28 47° 59° 8267 6084 4267 2972 2214
09-29 40° 57° 8294 6101 4274 2972 2214
09-30 42° 50° 8318 6115 4278 2972 2214
2018Lo
(F)
Hi
(F)
GDD
22
GDD
32
GDD
42
GDD
50
GDD
55

 

Latest Updates

March 9th, 2018Note Regarding 2018 Alerts

We had an issue with the emailed alerts that should be resolved now, and apologize for any inconvenience. You may receive outdated alerts tomorrow (Saturday, March 10, 2018), so please check the details before taking any action. Thank you.


 

February 17th, 2018Welcome to a New GDD Season!

GDDTracker is ready for 2018 with GDD tracking that began on February 15. New this year will be the Smith-Kerns Dollar Spot Prediction Model which will be launching soon. Check back soon for additional details!
 

March 29th, 2017Timing crabgrass pre-emergence applications

Please note that Dr. Frank has written another helpful article available from the MSU Extension web site.

http://msue.anr.msu.edu/news/timing_crabgrass_pre_emergence_applications


 

March 9th, 2017Controlling Annual Bluegrass Seedheads: Spray Now or Wait?

Dr. Kevin Frank has posted a useful article at the MSU Extension website. Please note it is written specifically for Michigan but may apply to other midwest regions.

"Growing degree-days have accumulated quickly, but it may not yet be time to apply plant growth regulators to control annual bluegrass seedheads on golf courses.

Read more: http://msue.anr.msu.edu/news/controlling_annual_bluegrass_seedheads_spray_now_or_wait


 

February 26th, 2017Early Spring in Michigan: Boom or Bust?

Dr. Kevin Frank has posted a helpful article on the MSU Extension website. Much of the midwest is experiencing the same (very) early warm-up, so non-Michiganders may find it help as well!

http://msue.anr.msu.edu/news/is_an_early_spring_a_boom_or_bust_for_golf_course_turf
 

February 16th, 2017Missing weather data

All air temperature data has been accounted for now.