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StormTracker blog

Today will be a bit on the breezy side, but warm. High near 88* with a southeast wind at 10-25 mph. Tonight will be mostly cloudy, with an isolated storm possible. Low near 65* with a southeast wind at 10-20 mph. Thursday will start out nice, but showers and storms will develop during the afternoon. Some severe storms are possible. Storm chances will continue through Sunday with highs in the low to middle 80s.

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March 18, 2013

Temperature   Observed Time Record Year Normal Normal Departure Last Year High 32° 441 AM 78° 2012 37° -5° 78° Low 4° 1159 PM -19° 1923 21° -17° 60° Average 18°       29° -11° 69°
Precipitation   Observed Record Year Normal Normal Departure Last Year Precipitation 0.14 0.64 1968 0.05 0.09 0.00 Month to Date 1.38 0.74     0.64 0.38 SINCE MAR 1 1.38 0.74     0.64 0.38 Since Jan. 1 3.57 2.05     1.52 1.91
Snow   Observed Record Year Normal Normal Departure Last Year Snowfall 1.4 3.7 1932 0.3 1.1 Month to Date 14.6     6.3 8.3 SINCE MAR 1 14.6     6.3 8.3 SINCE JUL 1 51.7     4.3 7.4 Snow Depth
Degree Days Heating   Observed Normal Normal Departure Last Year Heating 47 36 11 0 Month to Date 859 729 130 526 SINCE MAR 1 859 729 130 526 SINCE JUL 1 7450 7407 43 5953
Degree Days Cooling   Observed Normal Normal Departure Last Year Cooling 0 0 0 4 Month to Date 0 0 0 4 SINCE MAR 1 0 0 0 4 SINCE JAN 1 0 0 0 4
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: 0.8 Conditions LT FREEZING RAIN HEAVY SNOW SNOW LIGHT SNOW FOG FOG W/VISIBILITY <= 1/4 MILE HAZE	Climate Normals for Today   Average Record Year Temperature High 38° 76° 2012 Temperature Low 21° -14° 1883     March 19 2013 Sunrise 732 AM CDT Sunset 739 PM CDT March 20 2013 Sunrise 730 AM CDT Sunset 740 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.