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 Tue, Apr. 15. 2014

 

GDD Total: 196 (Base 32) through Tue, Apr. 15, 2014

  

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 2013 & 2014

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 35° 45° 506 204 61 17 3
04-17 25° 50° 521 209 61 17 3
04-18 30° 68° 548 226 67 17 3
04-19 39° 65° 578 246 77 19 3
2014Lo
(F)
Hi
(F)
GDD
22
GDD
32
GDD
42
GDD
50
GDD
55
04-20 35° 72° 610 268 89 22 3
04-21 38° 72° 643 291 102 27 3
04-22 41° 71° 677 315 116 33 4
2013Lo
(F)
Hi
(F)
GDD
22
GDD
32
GDD
42
GDD
50
GDD
55
02-19 17° 41° 0 0 0 0 0
02-20 15° 23° 0 0 0 0 0
02-21 19° 25° 0 0 0 0 0
02-22 20° 32° 4 0 0 0 0
02-23 26° 31° 11 0 0 0 0
02-24 21° 35° 17 0 0 0 0
02-25 10° 37° 19 0 0 0 0
02-26 20° 34° 24 0 0 0 0
02-27 33° 35° 36 2 0 0 0
02-28 29° 36° 47 3 0 0 0
03-01 17° 29° 48 3 0 0 0
03-02 28° 48 3 0 0 0
2013Lo
(F)
Hi
(F)
GDD
22
GDD
32
GDD
42
GDD
50
GDD
55
03-03 10° 31° 48 3 0 0 0
03-04 31° 48 3 0 0 0
03-05 10° 33° 48 3 0 0 0
03-06 27° 36° 57 3 0 0 0
03-07 19° 34° 61 3 0 0 0
03-08 12° 35° 63 3 0 0 0
03-09 19° 37° 69 3 0 0 0
03-10 37° 43° 86 10 0 0 0
03-11 34° 43° 103 16 0 0 0
03-12 29° 33° 112 16 0 0 0
03-13 23° 31° 117 16 0 0 0
03-14 18° 39° 124 16 0 0 0
2013Lo
(F)
Hi
(F)
GDD
22
GDD
32
GDD
42
GDD
50
GDD
55
03-15 32° 39° 137 20 0 0 0
03-16 25° 33° 144 20 0 0 0
03-17 22° 30° 148 20 0 0 0
03-18 21° 33° 153 20 0 0 0
03-19 21° 32° 157 20 0 0 0
03-20 14° 24° 157 20 0 0 0
03-21 14° 31° 158 20 0 0 0
03-22 25° 37° 167 20 0 0 0
03-23 27° 36° 176 20 0 0 0
03-24 26° 39° 187 21 0 0 0
03-25 31° 39° 200 24 0 0 0
03-26 30° 43° 215 28 0 0 0
2013Lo
(F)
Hi
(F)
GDD
22
GDD
32
GDD
42
GDD
50
GDD
55
03-27 29° 48° 231 35 0 0 0
03-28 29° 52° 249 43 0 0 0
03-29 24° 54° 267 50 0 0 0
03-30 24° 58° 285 59 0 0 0
03-31 36° 48° 305 69 0 0 0
04-01 27° 34° 314 69 0 0 0
04-02 22° 42° 324 69 0 0 0
04-03 22° 45° 336 71 0 0 0
04-04 25° 55° 354 79 0 0 0
04-05 31° 50° 372 88 0 0 0
04-06 35° 58° 397 102 5 0 0
04-07 34° 56° 419 115 7 0 0
2013Lo
(F)
Hi
(F)
GDD
22
GDD
32
GDD
42
GDD
50
GDD
55
04-08 31° 50° 438 123 7 0 0
04-09 40° 48° 460 136 9 0 0
04-10 37° 43° 478 144 9 0 0
04-11 35° 37° 492 147 9 0 0
04-12 33° 41° 507 153 9 0 0
04-13 35° 40° 523 158 9 0 0
04-14 30° 48° 540 165 9 0 0
04-15 43° 64° 571 187 21 4 0
04-16 42° 53° 597 202 27 4 0
04-17 40° 52° 621 216 30 4 0
04-18 44° 65° 653 239 43 8 0
04-19 35° 58° 678 253 47 8 0
2013Lo
(F)
Hi
(F)
GDD
22
GDD
32
GDD
42
GDD
50
GDD
55
04-20 28° 39° 690 255 47 8 0
04-21 25° 53° 706 261 47 8 0
04-22 33° 64° 733 278 54 8 0
04-23 42° 63° 764 299 65 11 0
04-24 34° 47° 782 307 65 11 0
04-25 36° 50° 803 319 66 11 0
04-26 33° 64° 830 335 73 11 0
04-27 43° 70° 864 360 87 17 2
04-28 50° 62° 899 384 102 24 3
04-29 47° 73° 937 412 120 34 8
04-30 57° 77° 982 448 145 51 21
05-01 60° 84° 1032 487 175 73 37
2013Lo
(F)
Hi
(F)
GDD
22
GDD
32
GDD
42
GDD
50
GDD
55
05-02 58° 81° 1079 525 202 92 52
05-03 54° 78° 1123 559 226 108 63
05-04 55° 76° 1167 592 250 124 73
05-05 50° 77° 1208 624 271 137 82
05-06 47° 78° 1249 654 291 150 89
05-07 47° 79° 1290 685 312 163 97
05-08 51° 80° 1333 719 336 178 108
05-09 51° 81° 1378 753 360 195 119
05-10 44° 61° 1408 773 371 197 119
05-11 39° 55° 1433 788 376 197 119
05-12 36° 45° 1451 796 376 197 119
05-13 29° 56° 1472 807 376 197 119
2013Lo
(F)
Hi
(F)
GDD
22
GDD
32
GDD
42
GDD
50
GDD
55
05-14 45° 74° 1509 835 394 207 123
05-15 59° 78° 1556 871 421 225 137
05-16 49° 82° 1600 905 444 241 148
05-17 51° 69° 1638 933 463 251 153
05-18 54° 82° 1684 970 489 270 166
05-19 55° 88° 1734 1009 519 291 183
05-20 68° 86° 1789 1055 554 319 205
05-21 65° 81° 1840 1095 585 341 223
05-22 59° 69° 1882 1127 607 355 232
05-23 44° 59° 1911 1147 616 357 232
05-24 36° 63° 1939 1164 623 357 232
05-25 39° 65° 1969 1184 634 359 232
2013Lo
(F)
Hi
(F)
GDD
22
GDD
32
GDD
42
GDD
50
GDD
55
05-26 41° 70° 2002 1208 647 364 233
05-27 48° 61° 2034 1230 659 368 233
05-28 52° 76° 2077 1262 681 383 242
05-29 62° 79° 2125 1301 710 403 258
05-30 67° 86° 2180 1345 745 430 279
05-31 68° 80° 2232 1387 777 454 298
06-01 66° 79° 2282 1428 807 476 316
06-02 49° 64° 2317 1452 822 483 317
06-03 40° 67° 2349 1474 833 487 317
06-04 46° 72° 2386 1501 851 496 322
06-05 56° 70° 2427 1532 872 509 330
06-06 55° 67° 2466 1561 890 520 335
2013Lo
(F)
Hi
(F)
GDD
22
GDD
32
GDD
42
GDD
50
GDD
55
06-07 49° 73° 2505 1590 910 531 342
06-08 49° 74° 2544 1620 929 542 348
06-09 55° 81° 2591 1656 955 561 361
06-10 62° 73° 2636 1692 981 578 374
06-11 57° 80° 2683 1728 1008 597 388
06-12 61° 79° 2731 1766 1036 617 403
06-13 62° 77° 2778 1803 1063 636 417
06-14 54° 78° 2822 1837 1087 652 428
06-15 55° 74° 2865 1870 1109 667 437
06-16 64° 80° 2915 1910 1139 689 454
06-17 58° 84° 2964 1949 1168 710 470
06-18 56° 72° 3006 1981 1190 724 479
2013Lo
(F)
Hi
(F)
GDD
22
GDD
32
GDD
42
GDD
50
GDD
55
06-19 46° 75° 3044 2009 1209 734 485
06-20 50° 83° 3089 2044 1233 751 496
06-21 61° 85° 3140 2085 1264 774 514
06-22 69° 86° 3196 2131 1300 802 537
06-23 69° 90° 3253 2178 1338 831 562
06-24 70° 86° 3309 2224 1374 859 585
06-25 67° 80° 3361 2266 1405 883 603
06-26 65° 85° 3414 2309 1438 908 623
06-27 68° 89° 3470 2355 1475 936 647
06-28 65° 81° 3521 2397 1506 959 665
06-29 62° 73° 3567 2432 1532 977 678
06-30 62° 82° 3617 2472 1562 999 695
2013Lo
(F)
Hi
(F)
GDD
22
GDD
32
GDD
42
GDD
50
GDD
55
07-01 54° 79° 3661 2507 1586 1015 706
07-02 56° 71° 3703 2538 1607 1029 714
07-03 58° 79° 3749 2575 1634 1047 728
07-04 59° 80° 3797 2612 1662 1067 743
07-05 63° 86° 3850 2655 1694 1092 762
07-06 66° 86° 3904 2699 1729 1118 784
07-07 71° 88° 3961 2747 1766 1147 808
07-08 72° 81° 4016 2791 1801 1174 830
07-09 67° 89° 4072 2837 1837 1202 853
07-10 63° 84° 4123 2879 1868 1225 871
07-11 57° 83° 4171 2917 1896 1245 886
07-12 55° 85° 4219 2954 1924 1265 901
2013Lo
(F)
Hi
(F)
GDD
22
GDD
32
GDD
42
GDD
50
GDD
55
07-13 58° 88° 4270 2995 1955 1288 919
07-14 62° 93° 4325 3040 1990 1315 941
07-15 69° 94° 4385 3090 2029 1347 967
07-16 73° 95° 4447 3142 2071 1381 996
07-17 75° 96° 4510 3195 2115 1416 1027
07-18 74° 96° 4573 3249 2158 1451 1057
07-19 79° 96° 4639 3304 2204 1489 1090
07-20 68° 88° 4695 3350 2240 1517 1113
07-21 58° 86° 4745 3390 2270 1539 1130
07-22 65° 86° 4798 3433 2303 1564 1150
07-23 58° 81° 4846 3471 2330 1584 1164
07-24 47° 76° 4885 3501 2350 1595 1171
2013Lo
(F)
Hi
(F)
GDD
22
GDD
32
GDD
42
GDD
50
GDD
55
07-25 50° 80° 4928 3534 2373 1610 1181
07-26 61° 76° 4975 3571 2400 1629 1195
07-27 56° 70° 5016 3601 2421 1642 1203
07-28 50° 67° 5053 3628 2437 1651 1206
07-29 56° 70° 5093 3659 2458 1663 1214
07-30 46° 81° 5135 3690 2479 1677 1222
07-31 62° 70° 5179 3724 2503 1693 1233
08-01 59° 80° 5226 3761 2531 1712 1248
08-02 56° 76° 5270 3795 2555 1728 1259
08-03 54° 80° 5315 3830 2579 1745 1270
08-04 53° 77° 5358 3863 2602 1760 1280
08-05 47° 72° 5395 3890 2620 1769 1285
2013Lo
(F)
Hi
(F)
GDD
22
GDD
32
GDD
42
GDD
50
GDD
55
08-06 64° 78° 5444 3929 2649 1790 1301
08-07 64° 81° 5495 3970 2679 1813 1318
08-08 56° 80° 5541 4006 2705 1831 1331
08-09 53° 82° 5586 4042 2731 1848 1344
08-10 57° 81° 5633 4078 2758 1867 1358
08-11 58° 79° 5679 4115 2784 1885 1371
08-12 64° 74° 5726 4152 2811 1904 1385
08-13 52° 69° 5765 4180 2830 1915 1391
08-14 45° 73° 5802 4207 2846 1924 1394
08-15 46° 77° 5841 4236 2866 1935 1401
08-16 50° 82° 5886 4271 2890 1952 1412
08-17 50° 84° 5931 4306 2915 1969 1424
2013Lo
(F)
Hi
(F)
GDD
22
GDD
32
GDD
42
GDD
50
GDD
55
08-18 51° 85° 5977 4342 2941 1987 1437
08-19 51° 85° 6023 4378 2967 2005 1450
08-20 59° 88° 6074 4419 2999 2028 1469
08-21 64° 91° 6130 4465 3034 2056 1491
08-22 63° 77° 6177 4503 3062 2075 1506
08-23 53° 83° 6224 4539 3088 2094 1519
08-24 52° 86° 6270 4576 3115 2112 1533
08-25 59° 90° 6323 4618 3148 2137 1553
08-26 70° 84° 6378 4664 3183 2164 1575
08-27 71° 89° 6437 4712 3221 2195 1600
08-28 71° 84° 6492 4758 3257 2222 1623
08-29 64° 88° 6546 4802 3291 2248 1644
2013Lo
(F)
Hi
(F)
GDD
22
GDD
32
GDD
42
GDD
50
GDD
55
08-30 68° 90° 6603 4848 3328 2277 1668
08-31 66° 80° 6654 4889 3359 2300 1686
09-01 62° 84° 6705 4930 3390 2323 1704
09-02 60° 71° 6748 4963 3413 2338 1714
09-03 53° 77° 6791 4996 3436 2353 1724
09-04 53° 82° 6836 5032 3461 2370 1736
09-05 49° 74° 6876 5061 3481 2382 1743
09-06 46° 81° 6917 5093 3502 2395 1751
09-07 63° 81° 6967 5133 3532 2417 1768
09-08 61° 78° 7015 5170 3560 2437 1783
09-09 59° 86° 7065 5210 3590 2459 1800
09-10 76° 94° 7129 5264 3633 2495 1830
2013Lo
(F)
Hi
(F)
GDD
22
GDD
32
GDD
42
GDD
50
GDD
55
09-11 67° 88° 7184 5309 3669 2522 1853
09-12 56° 78° 7229 5345 3694 2539 1865
09-13 47° 65° 7264 5369 3708 2546 1866
09-14 37° 70° 7295 5391 3720 2549 1866
09-15 48° 60° 7327 5413 3732 2553 1866
09-16 46° 62° 7359 5435 3744 2557 1866
09-17 36° 69° 7390 5455 3755 2560 1866
09-18 48° 81° 7433 5488 3778 2575 1876
09-19 61° 76° 7479 5525 3804 2593 1890
09-20 64° 72° 7526 5561 3830 2612 1903
09-21 53° 66° 7563 5588 3848 2621 1907
09-22 46° 55° 7592 5607 3856 2622 1907
2013Lo
(F)
Hi
(F)
GDD
22
GDD
32
GDD
42
GDD
50
GDD
55
09-23 38° 64° 7621 5626 3865 2623 1907
09-24 39° 69° 7653 5648 3877 2627 1907
09-25 43° 73° 7689 5674 3894 2635 1910
09-26 45° 76° 7728 5703 3912 2646 1916
09-27 45° 80° 7768 5733 3933 2658 1924
09-28 50° 82° 7812 5768 3957 2674 1935
09-29 53° 71° 7852 5797 3977 2686 1942
09-30 49° 72° 7891 5826 3996 2697 1948

 

Latest Updates

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.