a climate study of daily temperature change from the previous day
DESCRIPTION
A Climate Study of Daily Temperature Change From the Previous Day. By Matt Masek 14 th High Plains AMS/NWA Conference. Outline. Data Monthly Statistics Effects of Precipitation Strong Frontal Passages Extreme Values Final Thoughts. Data. North Platte (LBF) Daily Observation - PowerPoint PPT PresentationTRANSCRIPT
A Climate Study of Daily Temperature Change
From the Previous DayBy Matt Masek
14th High Plains AMS/NWA Conference
Outline
• Data• Monthly Statistics• Effects of Precipitation• Strong Frontal Passages• Extreme Values• Final Thoughts
Data
• North Platte (LBF) Daily Observation• 111 Years or 40,542 Days– July 1, 1899 (June 30,1899) to June 30, 2010
• Day 2 Compared To Day 1 (D2-D1=X)– Highs– Lows– Average Temperature (no rounding)
• X can be Positive, Negative, or 0 (Equal)
High TemperaturesMonth Total Days Positive D2-D1 Negative D2-D1 Equal D2-D1
Jan 3,441 1,697 49.3% 1,579 45.9% 165 4.8%
Feb 3,135 1,605 51.2% 1,410 45.0% 120 3.8%
Mar 3,441 1,809 52.6% 1,516 44.1% 116 3.4%
Apr 3,330 1,763 52.9% 1,457 43.8% 110 3.3%
May 3,441 1,840 53.5% 1,446 42.0% 155 4.5%
Jun 3,330 1,751 52.6% 1,389 41.7% 190 5.7%
Jul 3,441 1,768 51.4% 1,475 42.9% 198 5.8%
Aug 3,441 1,743 50.7% 1,469 42.7% 229 6.7%
Sep 3,330 1,666 50.0% 1,512 45.4% 152 4.6%
Oct 3,441 1,728 50.2% 1,587 46.1% 126 3.7%
Nov 3,330 1,624 48.8% 1,578 47.4% 128 3.8%
Dec 3,441 1,632 47.4% 1,644 47.8% 165 4.8%
Yr Total 40,542 20,626 50.9% 18,062 44.6% 1,854 4.6%
January February March April May June July August September October November December0.0%
10.0%
20.0%
30.0%
40.0%
50.0%
60.0%
49.3%51.2%
52.6% 52.9% 53.5% 52.6% 51.4% 50.7% 50.0% 50.2%48.8%
47.4%45.9% 45.0% 44.1% 43.8%
42.0% 41.7% 42.8% 42.7%45.4% 46.1%
47.4%
47.8%
4.8% 3.8% 3.4% 3.3% 4.5% 5.7% 5.8% 6.7%4.6% 3.7% 3.8% 4.8%
High Temperatures Day 2 Compared to Day 1
Day2 > Day1 Day2 < Day1 Day2 = Day1
Low TemperaturesMonth Total Days Positive D2-D1 Negative D2-D1 Equal D2-D1
Jan 3,441 1,523 44.3% 1,708 49.6% 210 6.1%
Feb 3,135 1,415 45.1% 1,514 48.3% 206 6.6%
Mar 3,441 1,568 45.6% 1,667 48.4% 206 6.0%
Apr 3,330 1,522 45.7% 1,623 48.7% 185 5.6%
May 3,441 1.568 45.6% 1,674 48.6% 199 5.8%
Jun 3,330 1,533 46.0% 1,573 47.2% 224 6.7%
Jul 3,441 1,526 44.3% 1,600 46.5% 315 9.2%
Aug 3,441 1,485 43.2% 1,676 48.7% 280 8.1%
Sep 3,330 1,395 41.9% 1,733 52.0% 202 6.1%
Oct 3,441 1,447 42.1% 1,772 51.5% 222 6.5%
Nov 3,330 1,402 42.1% 1,710 51.4% 218 6.5%
Dec 3,441 1,479 43.0% 1,752 50.9% 210 6.1%
Yr Total 40,542 17,863 44.1% 20,002 49.3% 2,677 6.6%
January February March April May June July August September October November December0.0%
10.0%
20.0%
30.0%
40.0%
50.0%
60.0%
44.3% 45.1% 45.6% 45.7% 45.6% 46.0%44.3% 43.2%
41.9% 42.1% 42.1% 43.0%
49.6%48.3% 48.4% 48.7% 48.6%
47.2% 46.5%48.7%
52.0% 51.5% 51.4% 50.9%
6.1% 6.6% 6.0% 5.6% 5.8% 6.7%9.2% 8.1%
6.1% 6.5% 6.5% 6.1%
Low Temperatures Day 2 Compared to Day 1
Day2 > Day1 Day2 < Day1 Day2 = Day1
Average TemperaturesMonth Total Days Positive D2-D1 Negative D2-D1 Equal D2-D1
Jan 3,441 1,776 51.6% 1,582 46.0% 83 2.4%
Feb 3,135 1,620 51.7% 1,422 45.4% 93 3.0%
Mar 3,441 1,844 53.6% 1,517 44.1% 80 2.3%
Apr 3,330 1,777 53.4% 1,460 43.8% 93 2.8%
May 3,441 1,816 52.6% 1,497 43.5% 128 3.7%
Jun 3,330 1,774 53.3% 1,434 43.1% 122 3.7%
Jul 3,441 1,719 50.0% 1,568 45.6% 154 4.5%
Aug 3,441 1,648 47.9% 1,634 47.5% 159 4.6%
Sep 3,330 1,626 48.8% 1,581 47.5% 123 3.7%
Oct 3,441 1,685 49.0% 1,656 48.1% 100 2.9%
Nov 3,330 1,588 47.7% 1,630 48.9% 112 3.4%
Dec 3,441 1,642 47.7% 1,687 49.0% 112 3.3%
Yr Total 40,542 20,515 50.6% 18,668 46.6% 1,359 3.4%
January February March April May June July August September October November December0.0%
10.0%
20.0%
30.0%
40.0%
50.0%
60.0%
51.6% 51.7%53.6% 53.4% 52.8% 53.3%
50.0%47.9% 48.8% 49.0%
47.7% 47.7%46.0% 45.4%
44.1% 43.8% 43.5% 43.1%45.6%
47.5% 47.5% 48.1%
48.9% 49.0%
2.4% 3.0% 2.3% 2.8% 3.7% 3.7% 4.5% 4.6% 3.7% 2.9% 3.4% 3.3%
Average Temperatures Day 2 Compared to Day 1
Day2 > Day1 Day2 < Day1 Day2 = Day1
Precipitation
• Compare Day 1 Received Rain• Compare Day 2 Received Rain• Both Day 1 & Day 2 Received Rain
• Positive• Negative• Neutral (Equal to 0)
High TemperaturesMonth Total Days Positive D2-D1 Negative D2-D1 Equal D2-D1
Jan 3,441 1,697 49.3% 1,579 45.9% 165 4.8%
Feb 3,135 1,605 51.2% 1,410 45.0% 120 3.8%
Mar 3,441 1,809 52.6% 1,516 44.1% 116 3.4%
Apr 3,330 1,763 52.9% 1,457 43.8% 110 3.3%
May 3,441 1,840 53.5% 1,446 42.0% 155 4.5%
Jun 3,330 1,751 52.6% 1,389 41.7% 190 5.7%
Jul 3,441 1,768 51.4% 1,475 42.9% 198 5.8%
Aug 3,441 1,743 50.7% 1,469 42.7% 229 6.7%
Sep 3,330 1,666 50.0% 1,512 45.4% 152 4.6%
Oct 3,441 1,728 50.2% 1,587 46.1% 126 3.7%
Nov 3,330 1,624 48.8% 1,578 47.4% 128 3.8%
Dec 3,441 1,632 47.4% 1,644 47.8% 165 4.8%
Yr Total 40,542 20,626 50.9% 18,062 44.6% 1,854 4.6%
Positive Day 2 High Temp with PrecipMonth Total Days Positive Day 1 Rain Positive Day 2 Rain Positive Both Rain
Jan 1,697 567 33.4% 375 22.1% 228 13.4%
Feb 1,605 617 38.4% 360 22.4% 237 14.8%
Mar 1,809 737 40.7% 441 24.4% 285 15.8%
Apr 1,763 736 41.7% 511 29.0% 302 17.1%
May 1,840 891 48.4% 730 39.7% 451 24.5%
Jun 1,751 846 48.3% 708 40.4% 439 25.1%
Jul 1,768 769 43.5% 644 36.4% 353 20.0%
Aug 1,743 688 39.5% 570 32.7% 303 17.4%
Sep 1,666 575 34.5% 381 22.9% 211 12.7%
Oct 1,728 489 28.3% 260 15.0% 163 9.4%
Nov 1,624 473 29.1% 263 16.2% 158 9.7%
Dec 1,632 503 30.8% 296 18.1% 186 11.4%
Yr Total 20,626 7,891 38.3% 5,539 26.9% 3,316 16.1%
January February March April May June July August September October November December0.0%
10.0%
20.0%
30.0%
40.0%
50.0%
60.0%
70.0%
33.4%
38.4%40.7% 41.7%
48.4% 48.3%
43.5%
39.5%
34.5%
28.3% 29.1%30.8%
22.1% 22.4%24.4%
29.0%
39.7% 40.4%
36.4%
32.7%
22.9%
15.0% 16.2%18.1%
13.4% 14.8% 15.8% 17.1%
24.5% 25.1%
20.0%17.4%
12.7%9.4% 9.7%
11.4%
Positive Day 2 High TemperaturesDay 1 with Rain, Day 2 with Rain, Both Day 1 & 2 with Rain
Day1 Received Precipitation Day2 Received Precipitation Both Day 1 & 2 Received Precipitation
Negative Day 2 High Temp with PrecipMonth Total Days Negative Day 1 Rain Negative Day 2 Rain Negative Both Rain
Jan 1,579 549 34.8% 747 47.3% 385 24.4%
Feb 1,410 529 37.5% 795 56.4% 404 28.7%
Mar 1,516 607 40.0% 914 60.3% 475 31.3%
Apr 1,457 642 44.1% 887 60.9% 494 33.9%
May 1,446 767 53.0% 925 64.0% 559 38.7%
Jun 1,389 724 52.1% 830 59.8% 500 36.0%
Jul 1,475 691 46.8% 829 56.2% 457 31.0%
Aug 1,469 660 44.9% 768 52.3% 422 28.7%
Sep 1,512 538 35.6% 729 48.2% 374 24.7%
Oct 1,587 410 25.8% 630 39.7% 264 16.6%
Nov 1,578 453 28.7% 671 42.5% 313 19.8%
Dec 1,644 531 32.3% 749 45.6% 356 21.7%
Yr Total 18,062 7,101 39.3% 9,474 52.5% 5,003 27.7%
January February March April May June July August September October November December0.0%
10.0%
20.0%
30.0%
40.0%
50.0%
60.0%
70.0%
34.8%37.5%
40.0%
44.1%
53.0% 52.1%
46.8%44.9%
35.6%
25.8%28.7%
32.3%
47.3%
56.4%
60.3% 60.9%64.0%
59.8%
56.2%
52.3%
48.2%
39.7%42.5%
45.6%
24.4%
28.7%31.3%
33.9%
38.7%36.0%
31.0%28.7%
24.7%
16.6%19.8%
21.7%
Negative Day 2 High TemperaturesDay 1 with Rain, Day 2 with Rain, Both Day 1 & 2 with Rain
Day1 Received Precipitation Day2 Received Precipitation Both Day 1 & 2 Received Precipitation
Equal Day 2 High Temp with PrecipMonth Total Days Equal Day 1 Rain Equal Day 2 Rain Equal Both Rain
Jan 165 58 35.2% 54 32.7% 32 19.4%
Feb 120 50 41.7% 47 39.2% 34 28.3%
Mar 116 53 45.7% 43 37.1% 28 24.1%
Apr 110 55 50.0% 45 40.9% 28 25.5%
May 155 69 44.5% 86 55.5% 46 29.7%
Jun 190 97 51.1% 103 54.2% 62 32.6%
Jul 198 85 42.9% 82 41.4% 38 19.2%
Aug 229 93 40.6% 90 39.3% 55 24.0%
Sep 152 35 23.0% 40 26.3% 16 10.5%
Oct 126 34 27.0% 28 22.2% 18 14.3%
Nov 128 33 25.8% 28 21.9% 16 12.5%
Dec 165 52 31.5% 47 28.5% 24 14.5%
Yr Total 1,854 714 38.5% 693 37.4% 397 21.4%
January February March April May June July August September October November December0.0%
10.0%
20.0%
30.0%
40.0%
50.0%
60.0%
70.0%
35.2%
41.7%
45.7%
50.0%
44.5%
51.1%
42.9%40.6%
23.0%
27.0% 25.8%
31.5%32.7%
39.2%37.1%
40.9%
55.5%
54.2%
41.4%39.3%
26.3%
22.2% 21.9%
28.5%
19.4%
28.3%24.1% 25.5%
29.7%32.6%
19.2%
24.0%
10.5%
14.3%12.5%
14.5%
Equal Day 2 High TemperaturesDay 1 with Rain, Day 2 with Rain, Both Day 1 & 2 with Rain
Day1 Received Precipitation Day2 Received Precipitation Both Day 1 & 2 Received Precipitation
Positive Day 2 Low Temp with PrecipMonth Total Days Positive Day 1 Rain Positive Day 2 Rain Positive Both Rain
Jan 1,523 306 20.1% 434 28.5% 174 11.4%
Feb 1,415 323 22.8% 445 31.4% 187 13.2%
Mar 1,568 371 23.7% 578 36.9% 229 14.6%
Apr 1,522 392 25.8% 631 41.5% 259 17.0%
May 1,568 562 35.8% 815 52.0% 392 25.0%
Jun 1,533 596 38.9% 744 48.5% 387 25.2%
Jul 1,526 535 35.1% 680 44.6% 320 21.0%
Aug 1,485 476 32.1% 627 42.2% 291 19.6%
Sep 1,395 274 19.6% 444 31.8% 170 12.2%
Oct 1,447 184 12.7% 376 26.0% 122 8.4%
Nov 1,402 227 16.2% 384 27.4% 140 10.0%
Dec 1,479 284 19.2% 431 29.1% 171 11.6%
Yr Total 17,863 4,530 25.4% 6,589 36.9% 2,842 15.9%
January February March April May June July August September October November December0.0%
10.0%
20.0%
30.0%
40.0%
50.0%
60.0%
70.0%
20.1%22.8% 23.7%
25.8%
35.8%38.9%
35.1%32.1%
19.6%
12.7%16.2%
19.2%
28.5%31.4%
36.9%
41.5%
52.0%48.5%
44.6%42.2%
31.8%
26.0%27.4%
29.1%
11.4%13.2% 14.6%
17.0%
25.0% 25.2%
21.0% 19.6%
12.2%8.4%
10.0%11.6%
Positive Day 2 Low TemperaturesDay 1 with Rain, Day 2 with Rain, Both Day 1 & 2 with Rain
Day1 Received Precipitation Day2 Received Precipitation Both Day 1 & 2 Received Precipitation
Negative Day 2 Low Temp with PrecipMonth Total Days Negative Day 1 Rain Negative Day 2 Rain Negative Both Rain
Jan 1,708 799 46.8% 666 39.0% 429 25.1%
Feb 1,514 794 52.4% 682 45.0% 443 29.3%
Mar 1,667 933 56.0% 723 43.4% 500 30.0%
Apr 1,623 937 57.7% 720 44.4% 499 30.7%
May 1,674 1,061 63.4% 803 48.0% 584 34.9%
Jun 1,573 945 60.1% 770 49.0% 530 33.7%
Jul 1,600 848 53.0% 716 44.8% 429 26.8%
Aug 1,676 840 50.1% 679 40.5% 417 24.9%
Sep 1,733 796 45.9% 630 36.4% 387 22.3%
Oct 1,772 689 38.9% 482 27.2% 281 15.9%
Nov 1,710 671 39.2% 514 30.1% 315 18.4%
Dec 1,752 738 42.1% 600 34.2% 365 20.8%
Yr Total 20,002 10,051 50.2% 7,985 39.9% 5,179 25.9%
January February March April May June July August September October November December0.0%
10.0%
20.0%
30.0%
40.0%
50.0%
60.0%
70.0%
46.8%
52.4%
56.0%57.7%
63.4%60.1%
53.0%50.1%
45.9%
38.9% 39.2%42.1%
39.0%
45.0%43.4% 44.4%
48.0% 49.0%
44.8%
40.5%
36.4%
27.2%30.1%
34.2%
25.1%
29.3% 30.0% 30.7%
34.9% 33.7%
26.8%24.9%
22.3%
15.9%18.4%
20.8%
Negative Day 2 Low TemperaturesDay 1 with Rain, Day 2 with Rain, Both Day 1 & 2 with Rain
Day1 Received Precipitation Day2 Received Precipitation Both Day 1 & 2 Received Precipitation
Equal Day 2 Low Temp with PrecipMonth Total Days Equal Day 1 Rain Equal Day 2 Rain Equal Both Rain
Jan 210 69 32.9% 76 36.2% 42 20.0%
Feb 206 79 38.3% 75 36.4% 45 21.8%
Mar 206 93 45.1% 97 47.1% 59 28.6%
Apr 185 104 56.2% 92 49.7% 66 35.7%
May 199 104 52.3% 123 61.8% 80 40.2%
Jun 224 126 56.3% 127 56.7% 84 37.5%
Jul 315 162 51.4% 159 50.5% 99 31.4%
Aug 280 125 44.6% 122 43.6% 72 25.7%
Sep 202 78 38.6% 76 37.6% 44 21.8%
Oct 222 60 27.0% 60 27.0% 42 18.9%
Nov 218 61 28.0% 64 29.4% 32 14.7%
Dec 210 64 30.5% 61 29.0% 30 14.3%
Yr Total 2,677 1,125 42.0% 1,132 42.3% 695 26.0%
January February March April May June July August September October November December0.0%
10.0%
20.0%
30.0%
40.0%
50.0%
60.0%
70.0%
32.9%
38.3%45.1%
56.2%
52.3%
56.3% 51.4%
44.6%
38.6%
27.0%
28.0%
30.5%
36.2%
36.4%
47.1% 49.7%
61.8%
56.7%
50.5%
43.6%
37.6%
27.0%
29.4%
29.0%
20.0% 21.8%
28.6%
35.7%
40.2%
37.5%
31.4%
25.7%21.8%
18.9%
14.7% 14.3%
Equal Day 2 Low TemperaturesDay 1 with Rain, Day 2 with Rain, Both Day 1 & 2 with Rain
Day1 Received Precipitation Day2 Received Precipitation Both Day 1 & 2 Received Precipitation
Positive Day 2 Avg Temp with PrecipMonth Total Days Positive Day 1 Rain Positive Day 2 Rain Positive Both Rain
Jan 1,776 504 28.4% 419 23.6% 212 11.9%
Feb 1,620 546 33.7% 396 24.4% 229 14.1%
Mar 1,844 650 35.2% 502 27.2% 269 14.6%
Apr 1,777 661 37.2% 561 31.6% 295 16.6%
May 1,816 796 43.8% 783 43.1% 423 23.3%
Jun 1,774 800 45.1% 786 44.3% 457 25.8%
Jul 1,719 686 39.9% 677 39.4% 355 20.7%
Aug 1,648 602 36.5% 595 36.1% 296 18.0%
Sep 1,626 477 29.3% 435 26.8% 204 12.5%
Oct 1,685 385 22.8% 308 18.3% 160 9.5%
Nov 1,588 389 24.5% 294 18.5% 145 9.1%
Dec 1,642 438 26.7% 349 21.3% 185 11.3%
Yr Total 20,515 6,934 33.8% 6,105 29.8% 3,230 15.7%
January February March April May June July August September October November December0.0%
10.0%
20.0%
30.0%
40.0%
50.0%
60.0%
70.0%
28.4%
33.7%35.2%
37.2%
43.8% 45.1%
39.9%36.5%
29.3%
22.8%24.5%
26.7%
23.6% 24.4%27.2%
31.6%
43.1%44.3%
39.4%
36.1%
26.8%
18.3% 18.5%21.3%
11.9%14.1% 14.6%
16.6%
23.3%25.8%
20.7%18.0%
12.5%9.5% 9.1%
11.3%
Positive Day 2 Average TemperaturesDay 1 with Rain, Day 2 with Rain, Both Day 1 & 2 with Rain
Day1 Received Precipitation Day2 Received Precipitation Both Day 1 & 2 Received Precipitation
Negative Day 2 Avg Temp with PrecipMonth Total Days Negative Day 1 Rain Negative Day 2 Rain Negative Both Rain
Jan 1,582 636 40.2% 727 46.0% 413 26.1%
Feb 1,422 611 43.0% 771 54.2% 428 30.1%
Mar 1,517 715 47.1% 868 57.2% 505 33.3%
Apr 1,460 728 49.9% 839 57.5% 504 34.5%
May 1,497 865 57.8% 898 60.0% 590 39.4%
Jun 1,434 810 56.5% 807 56.3% 516 36.0%
Jul 1,568 774 49.4% 811 51.7% 451 28.8%
Aug 1,634 777 47.6% 761 46.6% 445 27.2%
Sep 1,581 631 39.9% 685 43.3% 381 24.1%
Oct 1,656 519 31.3% 590 35.6% 276 16.7%
Nov 1,630 545 33.4% 649 39.8% 332 20.4%
Dec 1,687 619 36.7% 717 42.5% 367 21.8%
Yr Total 18,668 8,230 44.1% 9,123 48.9% 5,208 27.9%
January February March April May June July August September October November December0.0%
10.0%
20.0%
30.0%
40.0%
50.0%
60.0%
70.0%
40.2%43.0%
47.1%49.9%
57.8%
56.5%
49.4%47.6%
39.9%
31.3%33.4%
36.7%
46.0%
54.2%57.2% 57.5%
60.0%
56.3% 51.7%
46.6%43.3%
35.6%
39.8%42.5%
26.1%
30.1%33.3% 34.5%
39.4%36.0%
28.8%27.2%
24.1%
16.7%
20.4% 21.8%
Negative Day 2 Average TemperaturesDay 1 with Rain, Day 2 with Rain, Both Day 1 & 2 with Rain
Day1 Received Precipitation Day2 Received Precipitation Both Day 1 & 2 Received Precipitation
Equal Day 2 Avg Temp with PrecipMonth Total Days Equal Day 1 Rain Equal Day 2 Rain Equal Both Rain
Jan 83 34 41.0% 30 36.1% 20 24.1%
Feb 93 39 41.9% 35 37.6% 18 19.4%
Mar 80 32 40.0% 28 35.0% 14 17.5%
Apr 93 44 47.3% 43 46.2% 25 26.9%
May 128 66 51.6% 60 46.9% 43 33.6%
Jun 122 57 46.7% 48 39.3% 28 23.0%
Jul 154 85 55.2% 67 43.5% 42 27.3%
Aug 159 62 39.0% 72 45.3% 39 24.5%
Sep 123 40 32.5% 30 24.4% 16 13.0%
Oct 100 29 29.0% 20 20.0% 9 9.0%
Nov 112 25 22.3% 19 17.0% 10 8.9%
Dec 112 29 25.9% 26 23.2% 14 12.5%
Yr Total 1,359 542 39.9% 478 35.2% 278 20.5%
January February March April May June July August September October November December0.0%
10.0%
20.0%
30.0%
40.0%
50.0%
60.0%
70.0%
41.0% 41.9%40.0%
47.3%
51.6%
46.7%
55.2%
39.0% 32.5%
29.0%
22.3%25.9%
36.1%37.6%
35.0%
46.2% 46.9%
39.3%
43.5%
45.3%
24.4%
20.0%17.0%
23.2%24.1%
19.4% 17.5%
26.9%
33.6%
23.0%
27.3%24.5%
13.0%
9.0% 8.9%12.5%
Equal Day 2 Average TemperaturesDay 1 with Rain, Day 2 with Rain, Both Day 1 & 2 with Rain
Day1 Received Precipitation Day2 Received Precipitation Both Day 1 & 2 Received Precipitation
Frontal Passage
• Cold Front– Day 2 High within 1 degree of Day 1 Low– 573 Frontal Passages
• Warm Front– Day 2 Low within 1 degree of Day 1 High– 95 Frontal Passages
Cold Front (Change in Max Temp)Month -40+ -30 to -39 -20 to -29 -10 to -19 0 to -9 Total Tot %
January 1 16 20 24 11 72 12.6%
February 2 7 15 33 20 77 13.4%
March 1 7 19 22 20 69 12.0%
April 0 4 16 23 12 55 9.6%
May 0 1 7 11 9 28 4.9%
June 0 0 5 8 2 15 2.6%
July 0 0 1 6 0 7 1.2%
August 0 0 5 4 0 9 1.6%
September 0 3 13 13 5 34 5.9%
October 0 4 8 16 10 38 6.6%
November 0 2 15 29 27 73 12.7%
December 2 7 15 35 37 96 16.8%
Year Total 6 51 139 224 153 573
Warm Front (Change in Max Temp)Month 0 to 9 10 to 19 20 to 29 30 to 39 40+ Total Tot %
January 4 7 3 1 0 15 15.8%
February 5 3 2 1 0 11 11.6%
March 2 3 3 1 0 9 9.5%
April 1 3 2 0 0 6 6.3%
May 3 5 2 1 0 11 11.6%
June 0 0 1 0 0 1 1.1%
July 0 1 0 0 0 1 1.1%
August 0 0 0 0 0 0 0.0%
September 2 3 1 0 0 6 6.3%
October 1 3 4 1 0 9 9.5%
November 7 6 1 0 0 14 14.7%
December 6 2 3 1 0 12 12.6%
Year Total 31 36 22 6 0 95
January February March April May June July August September October November December0.0%
2.0%
4.0%
6.0%
8.0%
10.0%
12.0%
14.0%
16.0%
18.0%
20.0%
12.6%13.4%
12.0%
9.6%
4.9%
2.6%
1.2% 1.6%
5.9%6.6%
12.7%
16.8%15.8%
11.6%
9.5%
6.3%
11.6%
1.1% 1.1% 0.0%
6.3%
9.5%
14.7%
12.6%
Cold Frontal Passages & Warm Frontal Passages
Cold Front Passages (573 Fronts) Warm Front Passages (95 Fronts)
January February March April May June July August September October November December0.0%
2.0%
4.0%
6.0%
8.0%
10.0%
12.0%
14.0%
16.0%
18.0%
20.0%
12.6%13.4%
12.0%
9.6%
4.9%
2.6%
1.2% 1.6%
5.9%6.6%
12.7%
16.8%15.8%
11.6%
9.5%
6.3%
11.6%
1.1% 1.1% 0.0%
6.3%
9.5%
14.7%
12.6%
Cold Frontal Passages & Warm Frontal Passages
Cold Front Passages (573 Fronts) Warm Front Passages (95 Fronts)
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Extreme Daily Changes (Day 2 compared to Day 1)
High Temp Change Low Temp Change Ave Temp Change
Below -49.5 2 0 0
-49.5 to -40 28 0 0
-39.5 to -30 213 6 9
-29.5 to -20 139 171 311
-19.5 to -10 5,031 2,524 3,411
-9 .5 to 0 13,244 19,978 17,655
0.5 to 10 15,319 15,080 18,170
10.5 to 20 4,556 2,591 2,243
20.5 to 30 676 181 97
30.5 to 40 68 10 5
Above 40 7 1 0
-50 -47 -44 -41 -38 -35 -32 -29 -26 -23 -20 -17 -14 -11 -8 -5 -2 1 4 7 10 13 16 19 22 25 28 31 34 37 40 43 46 490
500
1000
1500
2000
2500
3000
Day 2 Temperature Change from Day 1
Highs
-50 -47 -44 -41 -38 -35 -32 -29 -26 -23 -20 -17 -14 -11 -8 -5 -2 1 4 7 10 13 16 19 22 25 28 31 34 37 40 43 46 490
500
1000
1500
2000
2500
3000
Day 2 Temperature Change from Day 1
Lows
-50 -47 -44 -41 -38 -35 -32 -29 -26 -23 -20 -17 -14 -11 -8 -5 -2 1 4 7 10 13 16 19 22 25 28 31 34 37 40 43 46 490
500
1000
1500
2000
2500
3000
Day 2 Temperature Change from Day 1
Average T
-50 -47 -44 -41 -38 -35 -32 -29 -26 -23 -20 -17 -14 -11 -8 -5 -2 1 4 7 10 13 16 19 22 25 28 31 34 37 40 43 46 490
500
1000
1500
2000
2500
3000
Day 2 Temperature Change from Day 1
Lows Highs Average T
Final Thoughts (Fun Facts)• High Temperatures– Average Daily Change
• If D2 Warmer → +7.7° (50.9%)• If D2 Colder → -8.8° (44.6%)
• Low Temperatures– Average Daily Change
• If D2 Warmer → +6.0° (44.1%)• If D2 Colder → -5.4° (49.3%)
• Average Temperatures– Average Daily Change
• If D2 Warmer → +5.2° (50.6%)• If D2 Colder → -5.7° (46.6%)
Final Thoughts
• Day 2 High Warmer than Day 1• Day 2 Low Cooler than Day 1• Precip on Day 1– Day 2 High More Likely to be Warmer– Day 2 Low More Likely to be Cooler
• Precip on Day 2– Day 2 High More Likely to be Cooler– Day 2 Low More Likely to be Warmer
• Many More Cold Fronts than Warm Fronts• Fronts Cause ± 10° to 19° Temp Change Most Often
Thank You
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