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MSU Proxy/Primo Seedhead Timer (GDD 32)
through Wed, Mar. 12. 2025

 

GDD Total: 141 (Base 32) through Wed, Mar. 12, 2025

  

Valparaiso, IN

        

Forecast »

“Flashback” to 2024

3/6

3/7

3/8

3/9

3/10

3/11

3/12

3/13

3/14

3/15

3/16

3/17

3/18

Done

651

Over

501

Target

220

Close

121

Under

0

 

Generously Supported By:



Tabular Data

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

2025Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
02-15 25° 36° 9 0 0 0 0
02-16 16° 30° 9 0 0 0 0
02-17 -1° 14° 9 0 0 0 0
02-18 -2° 13° 9 0 0 0 0
02-19 6° 19° 9 0 0 0 0
02-20 1° 24° 9 0 0 0 0
02-21 8° 30° 9 0 0 0 0
02-22 11° 35° 11 0 0 0 0
02-23 21° 44° 21 0 0 0 0
02-24 34° 54° 43 12 2 0 0
02-25 33° 56° 65 25 4 0 0
02-26 31° 49° 83 33 4 0 0
2025Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
02-27 33° 51° 103 43 4 0 0
02-28 30° 59° 126 55 7 0 0
02-29 n/a n/a n/a n/a n/a n/a n/a
03-01 17° 39° 132 55 7 0 0
03-02 13° 35° 134 55 7 0 0
03-03 26° 42° 146 57 7 0 0
03-04 39° 49° 167 69 9 0 0
03-05 28° 51° 185 76 9 0 0
03-06 25° 39° 195 77 9 0 0
03-07 29° 37° 207 78 9 0 0
03-08 31° 47° 223 85 9 0 0
03-09 31° 56° 245 96 10 0 0
2025Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
03-10 35° 66° 274 115 19 1 0
03-11 35° 53° 295 127 21 1 0
03-12 33° 59° 319 141 25 1 0
03-13 33° 67° 347 159 33 1 0
03-14 47° 74° 386 187 51 11 6
03-15 55° 69° 426 217 71 23 13
03-16 35° 44° 443 225 71 23 13
03-17 28° 56° 463 235 71 23 13
03-18 44° 67° 497 258 85 29 13
03-19 46° 60° 528 279 96 32 13
2024Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
02-15 32° 43° 16 6 0 0 0
02-16 23° 31° 21 6 0 0 0
02-17 12° 24° 21 6 0 0 0
02-18 17° 42° 28 6 0 0 0
02-19 21° 47° 40 8 0 0 0
02-20 26° 55° 59 16 0 0 0
02-21 39° 64° 89 36 10 2 0
02-22 39° 52° 112 50 13 2 0
02-23 31° 47° 129 56 13 2 0
02-24 20° 32° 133 56 13 2 0
02-25 30° 58° 155 68 15 2 0
02-26 34° 69° 184 88 25 4 0
2024Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
02-27 55° 68° 224 117 44 15 6
02-28 25° 62° 245 128 46 15 6
02-29 20° 41° 254 128 46 15 6
03-01 28° 43° 267 132 46 15 6
03-02 37° 56° 292 147 50 15 6
03-03 40° 70° 325 170 63 20 6
03-04 52° 71° 365 200 83 32 13
03-05 38° 62° 393 218 91 32 13
03-06 37° 49° 414 229 92 32 13
03-07 33° 50° 434 239 92 32 13
03-08 42° 53° 460 254 98 32 13
03-09 32° 44° 476 261 98 32 13
2024Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
03-10 30° 41° 490 264 98 32 13
03-11 27° 63° 513 278 101 32 13
03-12 41° 68° 546 300 114 36 13
03-13 45° 71° 582 327 130 45 16
03-14 43° 69° 616 351 144 51 17
03-15 36° 44° 634 358 144 51 17
03-16 34° 60° 659 374 149 51 17
03-17 31° 41° 673 378 149 51 17
03-18 28° 33° 681 378 149 51 17
03-19 27° 56° 701 387 149 51 17
03-20 28° 43° 714 391 149 51 17
03-21 23° 39° 724 391 149 51 17
2024Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
03-22 31° 49° 742 399 149 51 17
03-23 28° 37° 753 400 149 51 17
03-24 28° 49° 769 406 149 51 17
03-25 40° 68° 801 428 161 54 17
03-26 37° 57° 826 443 166 54 17
03-27 31° 43° 841 448 166 54 17
03-28 26° 51° 857 454 166 54 17
03-29 32° 58° 880 467 169 54 17
03-30 40° 64° 910 487 179 56 17
03-31 37° 54° 934 501 183 56 17
04-01 45° 52° 960 517 189 56 17
04-02 36° 60° 986 533 195 56 17
2024Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
04-03 34° 38° 1000 537 195 56 17
04-04 36° 40° 1016 543 195 56 17
04-05 35° 45° 1035 552 195 56 17
04-06 31° 53° 1055 562 195 56 17
04-07 36° 56° 1079 576 199 56 17
04-08 45° 74° 1116 603 217 66 22
04-09 53° 67° 1154 631 234 76 26
04-10 42° 66° 1186 653 247 80 26
04-11 48° 56° 1216 673 257 82 26
04-12 46° 60° 1247 694 267 85 26
04-13 38° 69° 1279 716 279 88 26
04-14 56° 79° 1324 751 305 106 39
2024Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
04-15 49° 70° 1362 779 322 115 44
04-16 51° 76° 1403 810 344 129 52
04-17 62° 67° 1446 843 367 144 62
04-18 46° 64° 1479 866 380 149 62
04-19 43° 56° 1507 884 387 149 62
04-20 35° 46° 1525 892 387 149 62
04-21 34° 45° 1543 900 387 149 62
04-22 37° 65° 1572 919 396 150 62
04-23 49° 55° 1602 939 407 153 62
04-24 36° 51° 1624 951 408 153 62
04-25 30° 58° 1645 963 410 153 62
04-26 39° 61° 1674 981 418 153 62
2024Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
04-27 58° 76° 1718 1016 443 170 74
04-28 62° 74° 1764 1052 469 188 87
04-29 61° 68° 1807 1084 492 202 96
04-30 47° 75° 1846 1113 511 213 102
05-01 58° 77° 1892 1149 536 231 115
05-02 51° 84° 1937 1184 562 248 127
05-03 53° 66° 1974 1211 579 257 132
05-04 50° 82° 2018 1245 603 273 142
05-05 49° 66° 2053 1271 618 281 145
05-06 46° 74° 2091 1298 636 290 150
05-07 56° 78° 2136 1333 661 307 162
05-08 52° 79° 2180 1367 684 323 172
2024Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
05-09 52° 70° 2219 1396 703 334 178
05-10 48° 66° 2254 1421 718 341 180
05-11 49° 64° 2288 1446 733 348 182
05-12 45° 82° 2330 1477 755 361 191
05-13 61° 80° 2378 1516 783 382 206
05-14 55° 66° 2417 1544 802 392 211
05-15 55° 68° 2456 1573 821 403 218
05-16 50° 75° 2497 1604 841 416 225
05-17 60° 79° 2544 1642 869 436 240
05-18 59° 84° 2594 1681 899 457 257
05-19 65° 79° 2644 1721 929 479 273
05-20 61° 89° 2697 1764 962 504 294
2024Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
05-21 62° 88° 2751 1808 995 530 314
05-22 65° 79° 2800 1848 1025 552 331
05-23 55° 80° 2846 1883 1050 569 343
05-24 61° 81° 2895 1922 1079 590 359
05-25 59° 72° 2938 1955 1103 605 370
05-26 53° 74° 2980 1987 1124 619 378
05-27 58° 72° 3023 2020 1147 634 388
05-28 54° 73° 3064 2051 1169 647 397
05-29 52° 67° 3102 2079 1186 657 401
05-30 45° 71° 3138 2105 1202 665 404
05-31 49° 79° 3180 2137 1224 679 413
06-01 59° 69° 3221 2169 1246 693 422
2024Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
06-02 57° 72° 3264 2201 1269 707 432
06-03 54° 86° 3312 2239 1297 727 447
06-04 67° 87° 3367 2284 1332 754 469
06-05 67° 79° 3418 2325 1363 777 487
06-06 65° 79° 3468 2365 1392 799 503
06-07 58° 78° 3514 2401 1418 817 516
06-08 55° 80° 3559 2436 1444 834 529
06-09 52° 79° 3603 2470 1467 850 539
06-10 52° 63° 3638 2495 1483 857 542
06-11 43° 77° 3676 2523 1501 867 547
06-12 60° 90° 3729 2567 1534 893 567
06-13 71° 90° 3788 2615 1573 923 593
2024Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
06-14 64° 85° 3841 2658 1606 948 613
06-15 59° 83° 3890 2697 1635 969 629
06-16 61° 92° 3945 2742 1669 996 650
06-17 76° 93° 4007 2794 1712 1030 680
06-18 75° 88° 4066 2843 1751 1061 706
06-19 75° 93° 4128 2896 1793 1096 735
06-20 70° 92° 4187 2945 1832 1127 761
06-21 67° 92° 4245 2992 1870 1156 786
06-22 73° 91° 4305 3042 1910 1188 813
06-23 66° 83° 4357 3085 1942 1213 832
06-24 60° 83° 4407 3124 1972 1234 849
06-25 69° 82° 4460 3168 2005 1260 869
2024Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
06-26 69° 81° 4514 3211 2038 1285 889
06-27 61° 73° 4559 3246 2063 1302 901
06-28 60° 77° 4605 3283 2090 1321 915
06-29 72° 89° 4664 3331 2129 1351 941
06-30 57° 77° 4709 3366 2154 1368 952
07-01 47° 75° 4748 3395 2173 1379 959
07-02 59° 83° 4797 3434 2202 1400 975
07-03 73° 86° 4855 3482 2239 1430 999
07-04 68° 81° 4907 3524 2272 1454 1019
07-05 62° 83° 4958 3565 2303 1477 1036
07-06 61° 79° 5006 3603 2331 1497 1052
07-07 60° 89° 5058 3645 2363 1521 1071
2024Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
07-08 68° 86° 5113 3690 2398 1548 1093
07-09 69° 76° 5163 3731 2428 1571 1110
07-10 65° 80° 5214 3771 2459 1593 1128
07-11 61° 80° 5263 3810 2488 1614 1143
07-12 64° 84° 5315 3852 2519 1638 1162
07-13 64° 88° 5369 3896 2554 1664 1184
07-14 67° 83° 5422 3939 2587 1689 1203
07-15 67° 87° 5477 3984 2622 1716 1226
07-16 67° 82° 5530 4027 2654 1741 1245
07-17 64° 79° 5580 4067 2684 1763 1262
07-18 59° 70° 5622 4100 2707 1778 1272
07-19 52° 75° 5664 4131 2729 1791 1281
2024Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
07-20 55° 78° 5709 4166 2754 1808 1292
07-21 58° 80° 5756 4203 2781 1827 1307
07-22 61° 80° 5805 4242 2810 1848 1323
07-23 62° 83° 5855 4283 2840 1871 1340
07-24 64° 77° 5904 4321 2868 1891 1355
07-25 60° 78° 5951 4358 2895 1910 1369
07-26 51° 80° 5994 4391 2919 1925 1380
07-27 56° 82° 6041 4428 2946 1944 1394
07-28 62° 80° 6090 4467 2975 1965 1410
07-29 70° 84° 6145 4512 3010 1992 1432
07-30 66° 88° 6200 4558 3045 2020 1454
07-31 68° 88° 6256 4604 3081 2048 1477
2024Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
08-01 71° 84° 6312 4649 3117 2075 1500
08-02 68° 82° 6365 4692 3150 2100 1519
08-03 66° 89° 6420 4737 3185 2127 1542
08-04 66° 88° 6475 4782 3220 2154 1564
08-05 70° 91° 6534 4831 3258 2185 1589
08-06 69° 81° 6586 4873 3291 2209 1609
08-07 64° 78° 6635 4912 3320 2230 1625
08-08 58° 82° 6683 4950 3348 2250 1640
08-09 62° 74° 6729 4986 3374 2268 1653
08-10 53° 74° 6770 5018 3395 2282 1661
08-11 52° 77° 6813 5050 3417 2296 1670
08-12 52° 77° 6855 5082 3440 2310 1680
2024Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
08-13 52° 82° 6900 5117 3465 2327 1692
08-14 55° 84° 6948 5155 3492 2347 1706
08-15 65° 74° 6995 5193 3520 2367 1721
08-16 67° 85° 7050 5237 3554 2393 1742
08-17 66° 76° 7099 5276 3583 2414 1758
08-18 65° 74° 7146 5313 3611 2433 1773
08-19 62° 73° 7192 5349 3637 2451 1786
08-20 50° 70° 7230 5377 3655 2461 1791
08-21 47° 74° 7269 5406 3673 2472 1796
08-22 48° 77° 7309 5436 3694 2484 1804
08-23 49° 80° 7352 5469 3717 2499 1813
08-24 55° 89° 7402 5509 3746 2521 1830
2024Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
08-25 67° 90° 7458 5555 3783 2549 1854
08-26 72° 93° 7518 5606 3823 2582 1881
08-27 73° 95° 7580 5658 3865 2616 1910
08-28 70° 85° 7635 5703 3900 2643 1932
08-29 68° 87° 7691 5748 3935 2670 1954
08-30 72° 90° 7750 5797 3974 2701 1980
08-31 67° 83° 7803 5840 4008 2726 2001
09-01 60° 76° 7849 5876 4033 2744 2013
09-02 49° 74° 7888 5905 4053 2755 2020
09-03 48° 76° 7928 5935 4073 2767 2027
09-04 48° 82° 7971 5969 4096 2783 2037
09-05 59° 86° 8022 6009 4127 2805 2054
2024Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
09-06 58° 75° 8066 6043 4151 2821 2066
09-07 49° 64° 8100 6068 4165 2828 2067
09-08 42° 70° 8135 6092 4179 2834 2068
09-09 48° 80° 8177 6124 4201 2848 2077
09-10 49° 82° 8220 6157 4224 2863 2087
09-11 49° 86° 8265 6192 4250 2880 2100
09-12 55° 88° 8315 6232 4279 2902 2116
09-13 59° 85° 8365 6272 4309 2924 2133
09-14 61° 89° 8417 6315 4342 2949 2153
09-15 60° 88° 8469 6357 4374 2973 2172
09-16 55° 89° 8519 6397 4404 2995 2189
09-17 52° 85° 8566 6433 4431 3013 2203
2024Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
09-18 51° 87° 8613 6471 4458 3033 2217
09-19 53° 89° 8662 6510 4487 3054 2233
09-20 61° 85° 8713 6550 4518 3076 2251
09-21 58° 91° 8765 6593 4550 3101 2270
09-22 63° 71° 8810 6628 4575 3118 2282
09-23 61° 66° 8852 6659 4597 3131 2290
09-24 62° 70° 8896 6693 4620 3147 2301
09-25 57° 74° 8939 6726 4644 3162 2312
09-26 49° 77° 8981 6758 4665 3176 2320
09-27 61° 73° 9026 6793 4690 3193 2332
09-28 61° 70° 9069 6826 4714 3208 2343
09-29 63° 76° 9117 6864 4742 3228 2358
2024Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
09-30 59° 76° 9162 6899 4767 3245 2370

 

Latest Updates

February 15th, 2025Welcome to the 2025 GDD Tracking Season

Although winter seems very much entrenched in the Great Lakes region with snow and frigid temperatures in the forecast, GDDTracker starts counting on February 15. Spring is when GDDTracker receives the most attention for alerting turfgrass managers of optimal application timing windows for suppressing annual bluegrass seedheads and crabgrass preemergence applications. Beyond the spring models, there are several models that may be helpful throughout the season including the early season dollar spot DMI timer and the 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 successful 2025!
 

March 18th, 2024Timing crabgrass preemergence applications in spring

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


 

 

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