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Crabgrass/Annual Bluegrass Preemergence Timer (GDD 32)
through Sat, Apr. 10. 2021

 

GDD Total: 777 (Base 32) through Sat, Apr. 10, 2021

  

Indianapolis, IN

       

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 2021 & 2020

2021Lo
(F)
Hi
(F)
GDD
22
GDD
32
GDD
42
GDD
50
GDD
55
02-15 11° 16° 4 0 0 0 0
02-16 18° 4 0 0 0 0
02-17 -5° 22° 4 0 0 0 0
02-18 15° 26° 4 0 0 0 0
02-19 22° 4 0 0 0 0
02-20 12° 31° 4 0 0 0 0
02-21 20° 41° 13 0 0 0 0
02-22 34° 41° 28 6 0 0 0
02-23 37° 52° 51 18 3 0 0
02-24 36° 57° 75 33 7 0 0
02-25 27° 45° 90 37 7 0 0
02-26 25° 46° 103 41 7 0 0
2021Lo
(F)
Hi
(F)
GDD
22
GDD
32
GDD
42
GDD
50
GDD
55
02-27 40° 56° 129 57 13 0 0
02-28 42° 60° 159 76 23 2 0
02-29 n/a n/a n/a n/a n/a n/a n/a
03-01 29° 43° 173 80 23 2 0
03-02 23° 44° 184 81 23 2 0
03-03 30° 61° 207 95 26 2 0
03-04 32° 48° 225 103 26 2 0
03-05 23° 47° 239 106 26 2 0
03-06 25° 47° 253 110 26 2 0
03-07 23° 51° 268 115 26 2 0
03-08 32° 65° 295 132 33 2 0
03-09 40° 66° 326 153 44 5 0
2021Lo
(F)
Hi
(F)
GDD
22
GDD
32
GDD
42
GDD
50
GDD
55
03-10 52° 68° 364 182 63 15 5
03-11 50° 65° 400 207 78 23 8
03-12 38° 57° 426 223 84 23 8
03-13 37° 50° 447 234 85 23 8
03-14 32° 54° 468 245 86 23 8
03-15 32° 46° 485 252 86 23 8
03-16 36° 49° 505 262 86 23 8
03-17 41° 61° 534 282 96 24 8
03-18 36° 55° 558 295 99 24 8
03-19 30° 47° 575 302 99 24 8
03-20 26° 58° 595 312 100 24 8
03-21 32° 65° 622 329 107 24 8
2021Lo
(F)
Hi
(F)
GDD
22
GDD
32
GDD
42
GDD
50
GDD
55
03-22 40° 66° 653 350 118 27 8
03-23 47° 65° 687 375 132 33 9
03-24 55° 71° 729 406 153 46 17
03-25 43° 60° 758 425 163 48 17
03-26 46° 61° 790 447 174 51 17
03-27 43° 74° 826 473 190 60 20
03-28 38° 58° 852 489 196 60 20
03-29 29° 58° 874 501 198 60 20
03-30 45° 73° 911 528 215 69 24
03-31 38° 55° 935 542 220 69 24
04-01 28° 37° 946 543 220 69 24
04-02 22° 48° 959 546 220 69 24
2021Lo
(F)
Hi
(F)
GDD
22
GDD
32
GDD
42
GDD
50
GDD
55
04-03 32° 65° 985 563 226 69 24
04-04 44° 73° 1022 589 243 77 28
04-05 48° 77° 1063 620 264 90 36
04-06 52° 77° 1106 653 286 105 45
04-07 55° 78° 1150 687 311 121 57
04-08 57° 65° 1189 716 330 132 63
04-09 51° 78° 1232 749 352 147 73
04-10 54° 66° 1270 777 370 157 77
04-11 47° 54° 1298 795 379 157 77
04-12 46° 65° 1332 819 392 163 78
04-13 42° 59° 1360 837 401 163 78
04-14 42° 59° 1389 856 409 164 78
2021Lo
(F)
Hi
(F)
GDD
22
GDD
32
GDD
42
GDD
50
GDD
55
04-15 41° 62° 1418 875 419 165 78
04-16 41° 63° 1448 895 429 167 78
04-17 42° 62° 1478 915 439 169 78
2020Lo
(F)
Hi
(F)
GDD
22
GDD
32
GDD
42
GDD
50
GDD
55
02-15 10° 41° 4 0 0 0 0
02-16 32° 46° 21 7 0 0 0
02-17 31° 45° 37 13 0 0 0
02-18 31° 49° 54 21 0 0 0
02-19 24° 38° 63 21 0 0 0
02-20 21° 31° 67 21 0 0 0
02-21 14° 34° 70 21 0 0 0
02-22 21° 47° 82 23 0 0 0
02-23 32° 52° 102 33 0 0 0
02-24 38° 44° 121 42 0 0 0
02-25 35° 42° 137 48 0 0 0
02-26 27° 35° 147 48 0 0 0
2020Lo
(F)
Hi
(F)
GDD
22
GDD
32
GDD
42
GDD
50
GDD
55
02-27 22° 35° 153 48 0 0 0
02-28 21° 30° 157 48 0 0 0
02-29 16° 36° 161 48 0 0 0
03-01 26° 59° 181 59 0 0 0
03-02 48° 54° 210 77 9 1 0
03-03 40° 54° 235 93 14 1 0
03-04 36° 53° 257 105 17 1 0
03-05 30° 58° 279 117 19 1 0
03-06 29° 42° 293 120 19 1 0
03-07 22° 48° 306 123 19 1 0
03-08 32° 65° 332 140 25 1 0
03-09 51° 63° 368 165 41 8 2
2020Lo
(F)
Hi
(F)
GDD
22
GDD
32
GDD
42
GDD
50
GDD
55
03-10 39° 56° 393 181 46 8 2
03-11 39° 46° 414 191 47 8 2
03-12 43° 59° 443 210 56 9 2
03-13 37° 56° 467 225 60 9 2
03-14 34° 41° 483 230 60 9 2
03-15 32° 44° 499 236 60 9 2
03-16 37° 46° 519 246 60 9 2
03-17 38° 52° 542 259 64 9 2
03-18 39° 51° 565 272 66 9 2
03-19 47° 66° 599 297 81 16 4
03-20 34° 67° 628 315 90 17 4
03-21 30° 35° 638 316 90 17 4
2020Lo
(F)
Hi
(F)
GDD
22
GDD
32
GDD
42
GDD
50
GDD
55
03-22 28° 38° 650 317 90 17 4
03-23 36° 43° 667 325 90 17 4
03-24 36° 50° 688 336 91 17 4
03-25 36° 60° 714 352 97 17 4
03-26 44° 65° 747 374 109 21 4
03-27 52° 58° 780 397 122 26 4
03-28 56° 71° 821 429 144 39 12
03-29 53° 65° 858 456 161 49 17
03-30 42° 57° 886 474 169 49 17
03-31 38° 44° 905 483 169 49 17
04-01 40° 52° 929 497 173 49 17
04-02 34° 59° 954 511 177 49 17
2020Lo
(F)
Hi
(F)
GDD
22
GDD
32
GDD
42
GDD
50
GDD
55
04-03 44° 66° 987 534 191 54 17
04-04 46° 58° 1017 554 200 56 17
04-05 42° 53° 1042 570 206 56 17
04-06 41° 68° 1074 592 218 60 17
04-07 57° 79° 1120 628 244 78 30
04-08 58° 79° 1167 665 271 97 44
04-09 37° 55° 1191 679 275 97 44
04-10 32° 49° 1210 687 275 97 44
04-11 39° 62° 1239 706 284 98 44
04-12 49° 61° 1272 729 297 103 44
04-13 37° 54° 1295 743 300 103 44
04-14 31° 44° 1311 749 300 103 44
2020Lo
(F)
Hi
(F)
GDD
22
GDD
32
GDD
42
GDD
50
GDD
55
04-15 30° 46° 1327 755 300 103 44
04-16 27° 48° 1342 760 300 103 44
04-17 36° 48° 1362 770 300 103 44
04-18 32° 55° 1384 781 302 103 44
04-19 40° 61° 1412 800 310 103 44
04-20 37° 64° 1441 818 319 104 44
04-21 43° 55° 1468 835 326 104 44
04-22 36° 71° 1499 857 337 107 44
04-23 53° 61° 1534 882 352 114 46
04-24 47° 67° 1569 907 367 121 48
04-25 50° 67° 1605 933 384 129 51
04-26 43° 62° 1636 953 394 132 51
2020Lo
(F)
Hi
(F)
GDD
22
GDD
32
GDD
42
GDD
50
GDD
55
04-27 36° 67° 1665 973 403 133 51
04-28 55° 77° 1709 1007 427 149 62
04-29 52° 66° 1746 1034 444 158 66
04-30 44° 51° 1772 1049 450 158 66
05-01 41° 67° 1804 1071 462 162 66
05-02 56° 82° 1850 1108 489 181 80
05-03 53° 73° 1892 1139 510 194 88
05-04 47° 65° 1925 1163 523 199 89
05-05 41° 58° 1952 1180 531 199 89
05-06 39° 59° 1980 1197 538 199 89
05-07 42° 66° 2011 1219 550 203 89
05-08 37° 55° 2035 1233 553 203 89
2020Lo
(F)
Hi
(F)
GDD
22
GDD
32
GDD
42
GDD
50
GDD
55
05-09 29° 55° 2055 1243 553 203 89
05-10 40° 61° 2084 1261 562 204 89
05-11 39° 49° 2105 1273 564 204 89
05-12 35° 60° 2131 1289 569 204 89
05-13 41° 60° 2159 1307 577 204 89
05-14 53° 77° 2202 1340 600 219 99
05-15 63° 74° 2248 1376 626 237 112
05-16 56° 80° 2294 1412 653 255 125
05-17 65° 75° 2342 1449 680 274 140
05-18 57° 66° 2381 1479 700 286 146
05-19 57° 66° 2421 1508 719 297 152
05-20 54° 58° 2454 1532 733 303 153
2020Lo
(F)
Hi
(F)
GDD
22
GDD
32
GDD
42
GDD
50
GDD
55
05-21 54° 62° 2490 1558 748 311 156
05-22 58° 74° 2534 1592 773 327 167
05-23 62° 79° 2583 1630 801 347 182
05-24 62° 85° 2634 1671 832 370 201
05-25 66° 86° 2688 1716 867 397 222
05-26 67° 87° 2743 1761 901 424 244
05-27 68° 81° 2796 1803 934 448 263
05-28 67° 80° 2847 1845 965 472 282
05-29 64° 76° 2895 1882 993 491 297
05-30 55° 72° 2937 1914 1015 505 305
05-31 53° 70° 2976 1944 1035 517 312
06-01 49° 74° 3016 1974 1055 529 319
2020Lo
(F)
Hi
(F)
GDD
22
GDD
32
GDD
42
GDD
50
GDD
55
06-02 61° 88° 3069 2017 1087 554 339
06-03 69° 88° 3126 2063 1124 582 362
06-04 67° 83° 3179 2107 1157 608 383
06-05 67° 87° 3234 2151 1192 634 404
06-06 69° 89° 3291 2198 1229 663 428
06-07 59° 84° 3340 2238 1259 685 445
06-08 62° 88° 3393 2281 1292 710 465
06-09 71° 84° 3449 2327 1327 738 488
06-10 68° 85° 3503 2371 1361 764 509
06-11 60° 81° 3551 2409 1390 784 524
06-12 58° 85° 3601 2449 1419 806 541
06-13 61° 74° 3646 2484 1444 823 553
2020Lo
(F)
Hi
(F)
GDD
22
GDD
32
GDD
42
GDD
50
GDD
55
06-14 54° 76° 3689 2517 1467 838 563
06-15 51° 79° 3732 2550 1490 853 573
06-16 59° 83° 3781 2589 1519 874 589
06-17 60° 84° 3831 2629 1550 896 606
06-18 62° 86° 3883 2671 1582 920 625
06-19 65° 89° 3938 2716 1616 947 647
06-20 68° 91° 3996 2763 1654 976 671
06-21 66° 79° 4046 2803 1684 998 689
06-22 65° 85° 4099 2846 1717 1023 708
06-23 66° 78° 4148 2886 1747 1045 725
06-24 61° 80° 4197 2925 1775 1066 741
06-25 61° 84° 4247 2965 1806 1088 758
2020Lo
(F)
Hi
(F)
GDD
22
GDD
32
GDD
42
GDD
50
GDD
55
06-26 66° 90° 4304 3011 1842 1116 781
06-27 69° 79° 4355 3053 1874 1140 800
06-28 70° 82° 4409 3097 1908 1166 821
06-29 69° 86° 4465 3142 1943 1193 844
06-30 70° 85° 4521 3188 1979 1221 866
07-01 69° 88° 4577 3234 2015 1249 890
07-02 68° 89° 4634 3281 2052 1278 913
07-03 68° 90° 4691 3328 2089 1307 937
07-04 71° 91° 4749 3377 2128 1338 963
07-05 70° 91° 4808 3426 2166 1369 989
07-06 71° 91° 4867 3475 2205 1400 1015
07-07 71° 88° 4925 3522 2243 1429 1040
2020Lo
(F)
Hi
(F)
GDD
22
GDD
32
GDD
42
GDD
50
GDD
55
07-08 71° 90° 4983 3571 2282 1460 1065
07-09 70° 90° 5041 3619 2320 1490 1090
07-10 74° 84° 5098 3666 2356 1519 1114
07-11 67° 87° 5153 3711 2391 1546 1136
07-12 65° 82° 5204 3752 2423 1569 1154
07-13 60° 82° 5253 3791 2451 1590 1170
07-14 60° 86° 5304 3832 2482 1613 1188
07-15 63° 88° 5358 3875 2516 1638 1208
07-16 71° 79° 5411 3918 2549 1663 1228
07-17 65° 88° 5465 3963 2584 1690 1250
07-18 70° 90° 5523 4011 2621 1720 1275
07-19 72° 88° 5581 4058 2659 1749 1299
2020Lo
(F)
Hi
(F)
GDD
22
GDD
32
GDD
42
GDD
50
GDD
55
07-20 69° 84° 5635 4103 2694 1776 1321
07-21 68° 86° 5691 4148 2729 1803 1343
07-22 69° 84° 5745 4193 2764 1830 1365
07-23 72° 86° 5802 4240 2800 1859 1389
07-24 64° 85° 5855 4282 2833 1883 1408
07-25 63° 87° 5908 4326 2866 1909 1429
07-26 67° 91° 5965 4373 2903 1938 1453
07-27 72° 89° 6024 4421 2942 1968 1478
07-28 69° 85° 6079 4466 2977 1995 1500
07-29 65° 87° 6133 4510 3011 2021 1521
07-30 68° 76° 6182 4550 3041 2043 1538
07-31 66° 80° 6233 4591 3072 2066 1556
2020Lo
(F)
Hi
(F)
GDD
22
GDD
32
GDD
42
GDD
50
GDD
55
08-01 66° 75° 6282 4629 3100 2086 1571
08-02 62° 80° 6331 4668 3129 2107 1587
08-03 64° 78° 6380 4707 3158 2128 1604
08-04 62° 74° 6426 4744 3184 2147 1617
08-05 52° 74° 6467 4775 3205 2160 1625
08-06 56° 77° 6512 4809 3230 2176 1636
08-07 56° 80° 6558 4845 3256 2194 1649
08-08 56° 83° 6605 4883 3284 2214 1664
08-09 63° 87° 6659 4926 3317 2239 1684
08-10 68° 85° 6713 4971 3351 2266 1706
08-11 68° 82° 6766 5014 3385 2291 1726
08-12 66° 83° 6819 5057 3417 2316 1746
2020Lo
(F)
Hi
(F)
GDD
22
GDD
32
GDD
42
GDD
50
GDD
55
08-13 64° 85° 6872 5099 3450 2340 1765
08-14 69° 85° 6926 5144 3484 2367 1787
08-15 65° 87° 6980 5188 3519 2393 1808
08-16 68° 83° 7034 5232 3552 2419 1829
08-17 62° 83° 7085 5272 3583 2441 1847
08-18 61° 77° 7132 5310 3611 2461 1861
08-19 55° 79° 7177 5345 3635 2478 1873
08-20 56° 80° 7223 5381 3661 2496 1886
08-21 57° 83° 7271 5418 3689 2515 1901
08-22 59° 86° 7321 5459 3719 2538 1918
08-23 64° 86° 7374 5502 3752 2563 1938
08-24 69° 90° 7432 5549 3790 2592 1962
2020Lo
(F)
Hi
(F)
GDD
22
GDD
32
GDD
42
GDD
50
GDD
55
08-25 71° 91° 7491 5599 3830 2624 1989
08-26 70° 89° 7549 5647 3867 2654 2014
08-27 73° 83° 7605 5692 3903 2681 2036
08-28 75° 84° 7662 5740 3940 2711 2061
08-29 68° 83° 7716 5783 3974 2736 2081
08-30 56° 77° 7760 5817 3998 2752 2093
08-31 60° 83° 7809 5857 4028 2774 2109
09-01 67° 80° 7861 5898 4059 2797 2127
09-02 70° 78° 7913 5940 4091 2821 2146
09-03 67° 85° 7967 5984 4125 2847 2167
09-04 57° 78° 8012 6019 4150 2864 2180
09-05 52° 83° 8057 6055 4176 2882 2192
2020Lo
(F)
Hi
(F)
GDD
22
GDD
32
GDD
42
GDD
50
GDD
55
09-06 56° 79° 8103 6090 4201 2899 2204
09-07 69° 86° 8158 6135 4236 2926 2227
09-08 67° 89° 8214 6182 4272 2955 2250
09-09 62° 88° 8267 6225 4305 2980 2270
09-10 65° 75° 8315 6263 4333 3000 2285
09-11 64° 76° 8363 6301 4362 3020 2300
09-12 65° 83° 8415 6343 4394 3044 2319
09-13 65° 80° 8466 6383 4424 3066 2336
09-14 55° 77° 8510 6417 4448 3082 2347
09-15 51° 77° 8552 6449 4470 3096 2357
09-16 45° 81° 8593 6481 4491 3110 2365
09-17 50° 79° 8636 6513 4514 3124 2374
2020Lo
(F)
Hi
(F)
GDD
22
GDD
32
GDD
42
GDD
50
GDD
55
09-18 50° 66° 8672 6539 4530 3132 2377
09-19 42° 69° 8705 6562 4543 3137 2377
09-20 42° 74° 8741 6588 4559 3145 2381
09-21 44° 76° 8779 6616 4577 3155 2385
09-22 45° 77° 8818 6645 4596 3166 2391
09-23 49° 74° 8857 6675 4616 3178 2398
09-24 54° 77° 8901 6709 4639 3194 2409
09-25 51° 77° 8943 6741 4662 3208 2418
09-26 57° 75° 8987 6775 4685 3224 2429
09-27 60° 80° 9035 6812 4713 3243 2444
09-28 52° 67° 9072 6840 4731 3253 2448
09-29 44° 63° 9104 6861 4742 3256 2448
2020Lo
(F)
Hi
(F)
GDD
22
GDD
32
GDD
42
GDD
50
GDD
55
09-30 48° 72° 9142 6889 4760 3266 2453

 

Latest Updates

February 19th, 2021Welcome to the 2021 GDD Tracking Season

Despite the frigid temperatures covering most of the country this week, GDDtracker started counting on February 15. As temperatures warm and snow fall melts the first two models that gather the most attention are the Proxy/Primo timer for scheduling annual bluegrass seedhead suppression applications and the crabgrass preemergence application timer. As the season progresses the early season DMI timer and the Smith-Kerns dollar spot prediction model gather views. Further information on all models can be found under the "About" tab at the top of the screen. Thanks for your continued use and support of GDDtracker and best wishes for a successful 2021 growing season!