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StormTracker blog

Scattered thunderstorms will continue to move east this morning, but more storms will develop later this afternoon. Some of those storms could become severe. High near 86* with a southeast wind at 10-25 mph. Tonight, thunderstorms with heavy rainfall possible. Low near 67* with a southeast wind at 5-15 mph. Storm chances continue through Saturday with severe weather possible as well. We'll dry out for the end of the weekend, but more storms are possible next week. Stay tuned for updates throughout the day on the severe weather potential.

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January 12, 2013

Temperature   Observed Time Record Year Normal Normal Departure Last Year High 12° 1240 AM 49° 1987 18° -6° 7° Low 0° 1159 PM -38° 1912 0° 0° -1° Average 6°       9° -3° 3°
Precipitation   Observed Record Year Normal Normal Departure Last Year Precipitation 0.07 0.47 1988 0.02 0.05 T Month to Date 0.29 0.30     -0.01 0.12 SINCE DEC 1 0.66 1.13     -0.47 0.48 Since Jan. 1 0.29 0.30     -0.01 0.12
Snow   Observed Record Year Normal Normal Departure Last Year Snowfall 0.7 6.7 1988 0.4 0.3 Month to Date 1.7     4.8 3.1 SINCE DEC 1 6.8     6.0 9.2 SINCE JUL 1 15.2     4.6 9.4 Snow Depth
Degree Days Heating   Observed Normal Normal Departure Last Year Heating 59 56 3 62 Month to Date 576 668 -92 455 SINCE DEC 1 2127 2246 -119 1679 SINCE JUL 1 4036 4208 -172 3225
Degree Days Cooling   Observed Normal Normal Departure Last Year Cooling 0 0 0 0 Month to Date 0 0 0 0 SINCE DEC 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: 0.9 Conditions LIGHT SNOW HAZE BLOWING SNOW	Climate Normals for Today   Average Record Year Temperature High 18° 48° 1987 Temperature Low 0° -37° 1916     January 13 2013 Sunrise 809 AM CST Sunset 503 PM CST January 14 2013 Sunrise 809 AM CST Sunset 505 PM CST
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.