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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 29, 2013

Temperature   Observed Time Record Year Normal Normal Departure Last Year High 42° 219 PM 76° 1986 44° -2° 46° Low 13° 643 AM -15° 1969 25° -12° 33° Average 28°       35° -7° 40°
Precipitation   Observed Record Year Normal Normal Departure Last Year Precipitation T 0.73 1989 0.04 -0.04 0.32 Month to Date 1.38 1.21     0.17 0.78 SINCE MAR 1 1.38 1.21     0.17 0.78 Since Jan. 1 3.57 2.52     1.05 2.31
Snow   Observed Record Year Normal Normal Departure Last Year Snowfall 0.0 4.0 1940 0.2 0.2 Month to Date 14.6     8.8 5.8 SINCE MAR 1 14.6     8.8 5.8 SINCE JUL 1 51.7     6.8 4.9 Snow Depth
Degree Days Heating   Observed Normal Normal Departure Last Year Heating 37 30 7 25 Month to Date 1402 1093 309 700 SINCE MAR 1 1402 1093 309 700 SINCE JUL 1 7993 7771 222 6127
Degree Days Cooling   Observed Normal Normal Departure Last Year Cooling 0 0 0 0 Month to Date 0 0 0 6 SINCE MAR 1 0 0 0 6 SINCE JAN 1 0 0 0 6
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: 0.7 Conditions LIGHT RAIN FOG FOG W/VISIBILITY <= 1/4 MILE HAZE	Climate Normals for Today   Average Record Year Temperature High 45° 78° 1967 Temperature Low 26° -14° 1969     March 30 2013 Sunrise 710 AM CDT Sunset 754 PM CDT March 31 2013 Sunrise 708 AM CDT Sunset 755 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.