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StormTracker blog

The forecast for Sunday is looking gray. Sunday will be mostly cloudy with a chance of scattered showers and thundershowers. Cool. Highs near 65*. Breezy. Winds Southeast at 10-20 mph. Memorial Day looks mostly cloudy with a high in the low 70s. Scattered showers and thundershowers are possible for the holiday.

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February 18, 2013

Temperature   Observed Time Record Year Normal Normal Departure Last Year High 30° 305 AM 52° 1981 25° 5° 39° Low -1° 1159 PM -31° 1966 7° -8° 13° Average 15°       16° -1° 26°
Precipitation   Observed Record Year Normal Normal Departure Last Year Precipitation 0.04 0.55 1991 0.03 0.01 0.00 Month to Date 1.22 0.33     0.89 0.02 SINCE DEC 1 2.56 1.86     0.70 0.96 Since Jan. 1 2.19 1.03     1.16 0.60
Snow   Observed Record Year Normal Normal Departure Last Year Snowfall 0.5 5.6 1991 0.3 0.2 Month to Date 14.4     4.1 0.3 SINCE DEC 1 28.7     6.5 2.2 SINCE JUL 1 37.1     5.1 2.0 Snow Depth
Degree Days Heating   Observed Normal Normal Departure Last Year Heating 50 49 1 39 Month to Date 920 940 -20 786 SINCE DEC 1 4144 4246 -102 3409 SINCE JUL 1 6053 6208 -155 4955
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: 1.0 Conditions HEAVY SNOW SNOW LIGHT SNOW FOG FOG W/VISIBILITY <= 1/4 MILE HAZE BLOWING SNOW	Climate Normals for Today   Average Record Year Temperature High 25° 52° 1930 Temperature Low 7° -29° 1929     February 19 2013 Sunrise 724 AM CST Sunset 558 PM CST February 20 2013 Sunrise 723 AM CST Sunset 600 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.