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StormTracker blog

A mix of sun and clouds developing today with a high in the upper 70s to low 80s. The wind south at 10-20 mph (a bit lighter this morning). Scattered Thunderstorms redeveloping this afternoon and evening. Some storms may be locally severe. Tonight, some scattered thunderstorms with a low in mid to upper 50s. On and off again showers expected Sunday through Tuesday with cooler temperatures.

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March 12, 2013

Temperature   Observed Time Record Year Normal Normal Departure Last Year High 25° 318 PM 62° 1910 34° -9° 56° Low 7° 1159 PM -25° 1896 18° -11° 35° Average 16°       26° -10° 46°
Precipitation   Observed Record Year Normal Normal Departure Last Year Precipitation 0.05 0.70 1977 0.04 0.01 0.30 Month to Date 0.64 0.47     0.17 0.38 SINCE MAR 1 0.64 0.47     0.17 0.38 Since Jan. 1 2.83 1.78     1.05 1.91
Snow   Observed Record Year Normal Normal Departure Last Year Snowfall 0.6 5.1 1928 0.3 0.3 Month to Date 6.5     4.3 2.2 SINCE MAR 1 6.5     4.3 2.2 SINCE JUL 1 43.6     2.3 1.3 Snow Depth
Degree Days Heating   Observed Normal Normal Departure Last Year Heating 49 39 10 19 Month to Date 546 504 42 460 SINCE MAR 1 546 504 42 460 SINCE JUL 1 7137 7182 -45 5887
Degree Days Cooling   Observed Normal Normal Departure Last Year Cooling 0 0 0 0 Month to Date 0 0 0 0 SINCE MAR 1 0 0 0 0 SINCE JAN 1 0 0 0 0
Wind   Observed Highest Speed 3 Highest Direction 3 Highest Gust Speed 3 Highest Guest Direction 3	Relative Humidity   Observed Time Highest 3 3 Lowest 3 3 Average 3
Forecast Skycover POSSIBLE SUNSHINE: MM AVERAGE SKY COVER: 0.6 Conditions LIGHT SNOW FOG HAZE	Climate Normals for Today   Average Record Year Temperature High 34° 64° 1911 Temperature Low 18° -28° 1896     March 13 2013 Sunrise 743 AM CDT Sunset 730 PM CDT March 14 2013 Sunrise 741 AM CDT Sunset 732 PM CDT
Source: National Weather Service Climate Report

Wind (mph)	Temperature (Fahrenheit)
0	35°	30°	25°	20°	15°	10°	5°	0°	-5°	-10°	-15°	-20°	-25°	-30°	-35°	-40°	-45°
5	31	25	9	13	7	-1	-5	-11	-16	-22	-28	-34	-40	-46	-52	-57	-72
10	27	21	15	9	3	-4	-10	-16	-22	-28	-35	-41	-47	-53	-59	-66	-77
15	25	19	13	6	0	-7	-13	-19	-26	-35	-39	-45	-51	-58	-64	-71	-81
20	24	17	11	4	-2	-9	-15	-22	-29	-35	-37	-44	-55	-61	-68	-74	-84
25	23	16	9	3	-4	-11	-17	-24	-31	-37	-44	-51	-58	-64	-71	-78	-87
30	22	15	8	1	-5	-12	-19	-26	-33	-39	-46	-53	-60	-67	-73	-80	-89
35	21	14	7	0	-7	-14	-21	-28	-34	-41	-48	-55	-62	-69	-76	-82	-91
40	20	13	6	-1	-8	-15	-22	-29	-36	-43	-50	-57	-64	-71	-78	-84	-93
45	19	12	5	-2	-9	-16	-23	-30	-37	-44	-51	-58	-65	-72	-79	-86	-93
50	19	12	4	-3	-10	-17	-24	-31	-38	-45	-52	-60	-67	-74	-81	-89	-95
55	18	11	4	-3	-11	-18	-25	-32	-39	-46	-54	-61	-68	-75	-82	-89	-97
60	17	10	3	-4	-11	-19	-26	-33	-40	-48	-55	-62	-69	-76	-84	-91	-98

	Increasing Danger (Frostbite in 30 min.)
	Heightened Danger (Frostbite in 10 min.)
	Great Danger (Frostbite in 5 min.)

Differences Between the new and old systems

• Wind speed is now calculated for 5 feet off the ground. Wind speed was previously based on observations at 33 feet.
• The calm wind threshold was lowered to 3mph.
• A consistent standard for skin tissue resistance is now in use.
• Measurements are based on how wind affects the human face, typically the most exposed portion of the body.
• The table incorporates the theory that heat is lost from the body depending on its surroundings
• The sun's impact is not factored into the wind chill temperature formula.