Welcome!

It appears to be your first time visiting GDDTracker
Please enter your zip code for a customized experience. Also, be sure and watch our video introduction video.

   
       

Crabgrass/Annual Bluegrass Preemergence Timer (GDD 32)
through Wed, Apr. 24. 2024

 

GDD Total: 813 (Base 32) through Wed, Apr. 24, 2024

  

Grand Rapids, MI

        

Forecast »

“Flashback” to 2023

4/18

4/19

4/20

4/21

4/22

4/23

4/24

4/25

4/26

4/27

4/28

4/29

4/30

Done

801

Late

500

Optimum

250

Early

171

Under

0

 

Generously Supported By:



Tabular Data

Daily GDD accumulation for various base temperature models in 2024 & 2023

2024Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
02-15 30° 36° 11 1 0 0 0
02-16 22° 29° 14 1 0 0 0
02-17 17° 27° 14 1 0 0 0
02-18 24° 33° 20 1 0 0 0
02-19 16° 41° 27 1 0 0 0
02-20 28° 52° 45 9 0 0 0
02-21 39° 62° 73 27 8 0 0
02-22 33° 56° 95 39 10 0 0
02-23 26° 44° 108 42 10 0 0
02-24 14° 31° 109 42 10 0 0
02-25 26° 47° 123 47 10 0 0
02-26 32° 61° 148 61 15 0 0
2024Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
02-27 53° 74° 189 93 36 14 8
02-28 21° 58° 207 100 36 14 8
02-29 19° 34° 211 100 36 14 8
03-01 27° 47° 226 105 36 14 8
03-02 39° 54° 251 120 41 14 8
03-03 39° 66° 281 140 51 16 8
03-04 51° 69° 320 168 70 26 13
03-05 44° 63° 351 190 81 30 13
03-06 35° 52° 373 202 83 30 13
03-07 32° 48° 391 210 83 30 13
03-08 38° 47° 412 221 84 30 13
03-09 32° 45° 429 227 84 30 13
2024Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
03-10 30° 37° 440 229 84 30 13
03-11 28° 60° 462 241 86 30 13
03-12 43° 68° 496 265 99 35 14
03-13 43° 70° 530 289 113 42 15
03-14 43° 56° 557 306 121 42 15
03-15 34° 50° 577 316 121 42 15
03-16 32° 53° 598 326 121 42 15
03-17 28° 38° 609 327 121 42 15
03-18 24° 33° 615 327 121 42 15
03-19 30° 44° 630 332 121 42 15
03-20 23° 36° 637 332 121 42 15
03-21 17° 35° 641 332 121 42 15
2024Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
03-22 26° 31° 648 332 121 42 15
03-23 26° 35° 657 332 121 42 15
03-24 25° 40° 667 333 121 42 15
03-25 33° 65° 694 350 128 42 15
03-26 40° 62° 723 369 137 43 15
03-27 32° 38° 736 372 137 43 15
03-28 28° 43° 749 375 137 43 15
03-29 24° 50° 764 380 137 43 15
03-30 35° 45° 782 388 137 43 15
03-31 37° 46° 802 397 137 43 15
04-01 35° 53° 824 410 139 43 15
04-02 38° 47° 845 420 140 43 15
2024Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
04-03 35° 42° 861 427 140 43 15
04-04 36° 45° 880 435 140 43 15
04-05 35° 49° 900 445 140 43 15
04-06 30° 56° 921 457 141 43 15
04-07 33° 60° 945 471 145 43 15
04-08 44° 71° 981 496 161 50 17
04-09 48° 65° 1015 521 175 56 19
04-10 38° 67° 1045 541 185 59 19
04-11 48° 55° 1075 560 194 60 19
04-12 45° 56° 1103 579 203 60 19
04-13 40° 58° 1130 596 210 60 19
04-14 51° 75° 1171 627 231 73 27
2024Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
04-15 47° 68° 1207 653 247 81 29
04-16 46° 69° 1242 678 262 89 32
04-17 57° 69° 1283 709 283 101 40
04-18 48° 54° 1313 728 293 103 40
04-19 42° 52° 1338 743 297 103 40
04-20 36° 45° 1356 751 297 103 40
04-21 34° 48° 1374 760 297 103 40
04-22 35° 63° 1402 777 305 103 40
04-23 48° 62° 1435 801 318 108 40
04-24 37° 53° 1458 813 321 108 40
04-25 29° 56° 1478 824 321 108 40
04-26 33° 67° 1506 842 329 108 40
2024Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
04-27 55° 76° 1550 875 353 123 50
04-28 64° 79° 1599 915 382 145 67
04-29 63° 71° 1644 950 407 162 79
04-30 51° 64° 1680 975 423 169 81
05-01 48° 72° 1718 1003 441 179 86
2023Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
02-15 37° 52° 23 13 3 0 0
02-16 23° 37° 31 13 3 0 0
02-17 17° 26° 31 13 3 0 0
02-18 19° 38° 37 13 3 0 0
02-19 35° 46° 55 21 3 0 0
02-20 26° 40° 67 22 3 0 0
02-21 27° 38° 77 23 3 0 0
02-22 26° 31° 84 23 3 0 0
02-23 28° 37° 94 23 3 0 0
02-24 20° 27° 95 23 3 0 0
02-25 22° 32° 100 23 3 0 0
02-26 26° 38° 110 23 3 0 0
2023Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
02-27 24° 36° 118 23 3 0 0
02-28 32° 42° 133 28 3 0 0
02-29 n/a n/a n/a n/a n/a n/a n/a
03-01 33° 48° 152 36 3 0 0
03-02 32° 40° 166 40 3 0 0
03-03 30° 35° 176 40 3 0 0
03-04 30° 45° 192 46 3 0 0
03-05 32° 49° 210 55 3 0 0
03-06 32° 42° 225 60 3 0 0
03-07 30° 45° 241 65 3 0 0
03-08 26° 44° 254 68 3 0 0
03-09 31° 42° 268 73 3 0 0
2023Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
03-10 30° 38° 280 75 3 0 0
03-11 23° 38° 289 75 3 0 0
03-12 25° 33° 296 75 3 0 0
03-13 25° 30° 301 75 3 0 0
03-14 18° 36° 306 75 3 0 0
03-15 18° 44° 315 75 3 0 0
03-16 37° 50° 337 86 4 0 0
03-17 31° 49° 355 94 4 0 0
03-18 16° 30° 356 94 4 0 0
03-19 16° 34° 359 94 4 0 0
03-20 31° 47° 376 101 4 0 0
03-21 33° 53° 397 112 5 0 0
2023Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
03-22 39° 48° 419 124 7 0 0
03-23 36° 46° 438 133 7 0 0
03-24 31° 45° 454 139 7 0 0
03-25 32° 37° 466 141 7 0 0
03-26 31° 48° 484 149 7 0 0
03-27 35° 49° 504 159 7 0 0
03-28 28° 47° 519 164 7 0 0
03-29 24° 38° 528 164 7 0 0
03-30 17° 44° 537 164 7 0 0
03-31 41° 57° 564 181 14 0 0
04-01 34° 57° 588 195 18 0 0
04-02 26° 49° 603 200 18 0 0
2023Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
04-03 44° 57° 631 218 26 0 0
04-04 43° 51° 656 233 31 0 0
04-05 44° 70° 691 258 46 7 2
04-06 33° 46° 709 266 46 7 2
04-07 31° 51° 728 274 46 7 2
04-08 35° 58° 752 289 50 7 2
04-09 36° 65° 780 307 59 8 2
04-10 43° 67° 813 330 72 13 2
04-11 52° 71° 853 360 91 24 9
04-12 59° 77° 899 396 117 42 22
04-13 58° 79° 945 432 143 60 35
04-14 49° 83° 989 466 167 76 45
2023Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
04-15 59° 80° 1036 503 195 96 60
04-16 41° 68° 1069 526 207 100 60
04-17 33° 40° 1083 530 207 100 60
04-18 31° 46° 1100 537 207 100 60
04-19 32° 57° 1123 549 210 100 60
04-20 43° 75° 1160 577 227 109 64
04-21 44° 60° 1190 597 237 112 64
04-22 36° 51° 1211 608 239 112 64
04-23 35° 43° 1229 615 239 112 64
04-24 34° 48° 1247 624 239 112 64
04-25 33° 47° 1266 632 239 112 64
04-26 30° 50° 1284 641 239 112 64
2023Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
04-27 30° 64° 1309 656 244 112 64
04-28 43° 60° 1338 675 253 113 64
04-29 42° 63° 1369 696 264 115 64
04-30 40° 47° 1390 707 265 115 64
05-01 36° 41° 1407 714 265 115 64
05-02 38° 44° 1426 723 265 115 64
05-03 41° 55° 1452 739 271 115 64
05-04 38° 63° 1480 757 279 116 64
05-05 49° 74° 1519 786 298 127 71
05-06 53° 68° 1558 815 317 138 76
05-07 56° 75° 1602 849 341 153 87
05-08 52° 61° 1636 873 355 160 88
2023Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
05-09 44° 72° 1672 899 371 168 92
05-10 45° 74° 1710 927 389 178 96
05-11 47° 81° 1752 959 411 192 105
05-12 55° 80° 1798 995 437 210 118
05-13 62° 74° 1844 1031 463 228 131
05-14 52° 65° 1880 1057 479 236 134
05-15 39° 71° 1914 1080 493 241 135
05-16 43° 72° 1949 1106 508 249 137
05-17 43° 64° 1980 1127 519 252 137
05-18 41° 70° 2013 1150 532 257 137
05-19 54° 66° 2051 1178 550 267 142
05-20 47° 67° 2086 1203 565 274 144
2023Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
05-21 45° 74° 2123 1230 582 283 148
05-22 46° 74° 2162 1258 601 293 154
05-23 50° 81° 2205 1292 624 309 164
05-24 51° 68° 2243 1320 642 319 169
05-25 43° 68° 2277 1344 656 324 170
05-26 37° 75° 2311 1367 670 330 171
05-27 44° 79° 2350 1397 689 342 177
05-28 50° 82° 2394 1430 713 357 188
05-29 52° 87° 2441 1468 740 377 202
05-30 59° 89° 2493 1510 772 401 221
05-31 66° 91° 2549 1556 808 429 244
06-01 65° 90° 2604 1601 843 456 266
2023Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
06-02 65° 91° 2661 1647 880 484 290
06-03 64° 89° 2715 1692 914 510 311
06-04 60° 81° 2763 1730 942 531 326
06-05 56° 82° 2810 1767 969 550 340
06-06 59° 79° 2857 1804 996 569 354
06-07 48° 75° 2897 1834 1016 581 361
06-08 48° 75° 2936 1863 1035 592 367
06-09 49° 75° 2976 1893 1055 604 374
06-10 51° 80° 3020 1927 1079 620 385
06-11 56° 67° 3060 1957 1099 632 392
06-12 52° 63° 3096 1982 1115 639 395
06-13 49° 66° 3131 2008 1130 647 397
2023Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
06-14 49° 72° 3170 2037 1149 657 403
06-15 51° 73° 3210 2067 1169 669 410
06-16 55° 74° 3252 2099 1191 684 419
06-17 49° 79° 3295 2131 1214 698 429
06-18 51° 85° 3341 2168 1240 717 442
06-19 60° 86° 3392 2209 1271 740 460
06-20 60° 89° 3444 2251 1303 764 479
06-21 64° 90° 3499 2296 1338 791 501
06-22 64° 85° 3552 2339 1371 816 521
06-23 64° 82° 3603 2380 1402 839 539
06-24 64° 86° 3656 2423 1435 864 559
06-25 66° 84° 3710 2466 1469 889 580
2023Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
06-26 62° 69° 3753 2500 1492 905 590
06-27 59° 72° 3797 2533 1516 920 601
06-28 53° 81° 3842 2568 1541 937 613
06-29 64° 88° 3895 2612 1574 963 633
06-30 66° 85° 3949 2656 1608 989 654
07-01 67° 81° 4001 2698 1640 1013 673
07-02 68° 76° 4051 2738 1670 1035 690
07-03 66° 84° 4104 2781 1703 1060 710
07-04 61° 88° 4156 2823 1735 1084 729
07-05 69° 90° 4213 2870 1772 1113 753
07-06 67° 80° 4265 2912 1804 1137 772
07-07 57° 80° 4311 2948 1830 1155 785
2023Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
07-08 62° 70° 4355 2982 1854 1171 796
07-09 54° 80° 4401 3017 1880 1188 809
07-10 58° 85° 4450 3056 1909 1209 825
07-11 64° 82° 4500 3097 1939 1232 842
07-12 57° 77° 4546 3132 1965 1249 855
07-13 60° 74° 4591 3168 1990 1266 867
07-14 60° 84° 4641 3208 2020 1288 884
07-15 68° 80° 4693 3250 2052 1313 903
07-16 63° 77° 4741 3288 2080 1333 918
07-17 61° 74° 4787 3323 2106 1350 931
07-18 56° 77° 4831 3358 2130 1367 942
07-19 56° 82° 4878 3395 2157 1386 956
2023Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
07-20 62° 81° 4928 3435 2187 1407 973
07-21 61° 80° 4976 3473 2215 1428 988
07-22 58° 82° 5024 3511 2243 1448 1003
07-23 61° 76° 5071 3547 2270 1466 1017
07-24 59° 82° 5120 3586 2299 1487 1033
07-25 60° 86° 5171 3627 2330 1510 1051
07-26 65° 79° 5221 3667 2360 1532 1068
07-27 67° 87° 5276 3713 2395 1560 1090
07-28 71° 88° 5334 3761 2433 1589 1115
07-29 69° 83° 5388 3805 2467 1616 1136
07-30 63° 79° 5437 3844 2496 1637 1152
07-31 55° 80° 5483 3879 2522 1654 1165
2023Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
08-01 55° 80° 5528 3915 2547 1672 1177
08-02 66° 83° 5580 3957 2579 1696 1196
08-03 62° 83° 5631 3998 2610 1719 1214
08-04 63° 84° 5683 4040 2642 1742 1233
08-05 63° 79° 5732 4079 2671 1764 1249
08-06 61° 67° 5774 4111 2693 1778 1258
08-07 62° 78° 5822 4149 2721 1798 1273
08-08 58° 81° 5870 4186 2749 1817 1288
08-09 60° 80° 5918 4224 2777 1837 1303
08-10 62° 80° 5967 4263 2806 1858 1319
08-11 56° 82° 6014 4301 2833 1878 1333
08-12 65° 79° 6064 4341 2863 1900 1350
2023Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
08-13 60° 79° 6112 4379 2891 1920 1365
08-14 62° 76° 6159 4416 2918 1939 1379
08-15 61° 75° 6205 4452 2944 1957 1392
08-16 51° 78° 6247 4484 2966 1971 1401
08-17 60° 74° 6292 4519 2991 1988 1413
08-18 54° 72° 6334 4551 3013 2001 1422
08-19 51° 77° 6376 4583 3035 2015 1431
08-20 65° 86° 6429 4626 3068 2041 1451
08-21 63° 81° 6479 4666 3098 2062 1468
08-22 62° 77° 6526 4703 3125 2082 1482
08-23 66° 91° 6582 4749 3161 2110 1505
08-24 76° 92° 6644 4801 3203 2144 1534
2023Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
08-25 69° 77° 6696 4842 3235 2167 1553
08-26 63° 75° 6743 4880 3262 2187 1567
08-27 53° 73° 6784 4911 3283 2200 1575
08-28 50° 75° 6825 4941 3304 2212 1583
08-29 55° 74° 6867 4974 3326 2227 1592
08-30 55° 72° 6909 5005 3348 2240 1601
08-31 46° 74° 6947 5033 3366 2250 1606
09-01 48° 79° 6988 5065 3387 2264 1614
09-02 56° 79° 7033 5100 3412 2281 1626
09-03 64° 87° 7087 5144 3446 2307 1647
09-04 69° 89° 7144 5190 3483 2335 1671
09-05 72° 91° 7203 5240 3522 2367 1697
2023Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
09-06 69° 81° 7257 5283 3556 2392 1718
09-07 61° 72° 7301 5318 3580 2409 1729
09-08 56° 66° 7340 5346 3599 2419 1735
09-09 49° 73° 7378 5375 3617 2430 1740
09-10 49° 74° 7418 5405 3637 2442 1747
09-11 56° 64° 7456 5433 3655 2452 1752
09-12 53° 67° 7494 5461 3673 2462 1757
09-13 48° 65° 7529 5486 3688 2469 1759
09-14 45° 69° 7564 5511 3703 2476 1761
09-15 46° 71° 7601 5537 3720 2484 1765
09-16 50° 71° 7639 5566 3738 2494 1770
09-17 56° 68° 7679 5596 3758 2506 1777
2023Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
09-18 48° 66° 7714 5620 3773 2513 1779
09-19 44° 67° 7747 5644 3786 2519 1779
09-20 57° 78° 7793 5679 3812 2536 1792
09-21 56° 80° 7838 5715 3837 2554 1804
09-22 57° 81° 7886 5752 3865 2573 1819
09-23 56° 76° 7930 5786 3889 2589 1830
09-24 50° 75° 7970 5817 3909 2602 1837
09-25 53° 70° 8010 5846 3929 2613 1844
09-26 60° 73° 8054 5881 3953 2630 1855
09-27 59° 64° 8094 5911 3973 2642 1862
09-28 58° 64° 8133 5940 3992 2652 1868
09-29 55° 67° 8171 5968 4010 2663 1873
2023Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
09-30 49° 78° 8213 6000 4032 2677 1882

 

Latest Updates

March 18th, 2024Timing crabgrass preemergence applications in spring

Don't miss this update from from Kevin Frank regarding timing of crabgrass preemergence herbicides.


 

February 12th, 2024Welcome to the 2024 GDD Tracking Season

2024 might be the year that if you blinked you missed winter. We've already experienced some very unseasonably warm weather in February with temperatures in the 60's. Temperatures are remaining relatively mild but I wouldn't be surprised if winter resurfaced yet as we move through the rest of February and March. GDDTracker starts counting on February 15. Spring is typically the time of year when GDDTracker receives the most attention for alerting turfgrass managers of optimal application timing windows for suppressing annual bluegrass seedheads and crabgrass preemergence applications. However, there are many models you may find helpful throughout the season including the early season DMI timer and Smith-Kerns dollar spot prediction model. To learn about all the available models, click on the "About" tab at the top of the screen. Thanks for your continued support and use of GDDTracker and best wishes for a fantastic 2024!
 

 

© Copyright 2004-2024, Department of Crop and Soil Sciences, Michigan State University.
Weather data and programming assistance provided by Enviro-Weather and NWS
All Rights Reserved. Custom web development by Dynamite Inc.