Spring 2021 Fog Observations

Date is based on local time zone (CST). Inside temperature (Inside T) is the temperature overnight on the date listed. Likewise the Min. T, Min. Visibility, and Max. RH is for the overnight/morning low visibility period, which is taken from the 3D-PAWS before 3/16 and from the CS125 on and after 3/16. Note that Fog Forecast is a next day forecast for the date listed. Fog Occ. is if fog occurred on that day. T stands for temperature and RH for relative humidity.

Date	Inside T	Min. T	Min. Visibility	Max. RH	Min WS	Forecast	Fog Occ.	Notes
2021/03/04	65-70 F	-1.5 C	35 km (18 mi)	92 %	1.5 m/s	Possible	No	Fog stayed to the south and west
2021/03/05	75-78 F	-2.5 C	15 km (9.5 mi)	94 %	1.0 m/s	Unlikely	No
2021/03/06	78-80 F	-2.9 C	13.7 km (8.5 mi)	95 %	1.0 m/s	Unlikely	No
2021/03/07	90-93 F	1.6 C	15 km (9.5 mi)	91 %	2.9 m/s	No chance	No	Inside temp. too hot
2021/03/08	64-66 F	-3.0 C	6.7 km (4.2 mi)	93 %	0.3 m/s	Possible	No	Not supercooled if fog forms.
2021/03/09	74-77 F	4.8 C	26.7 km (16 mi)	90 %	2.0 m/s	No chance	No
2021/03/10	61-63 F	-4.0 C	0.49 km (0.30 mi)	93 %	4.0 m/s	No change	No
2021/03/11	50-52 F	-3.5 C	0.52 km (0.32 mi)	102 %	4.6 m/s	Possible	Yes	Snow event with associated fog
2021/03/12	49-51 F	-10.2 C	32.8 km (22.6 mi)	93 %	0.1 m/s	No Chance	No
2021/03/13	65-72 F	-1.2 C	7.9 km (5.0 mi)	98 %	2.0 m/s	Unlikely	No
2021/03/14	65-72 F	-3.0 C	27.0 km (17.0 mi)	77 %	0.2 m/s	No Chance	No
2021/03/15	65-68 F	-2.3 C	75.0 km (46.0 mi)	74 %	1.3 m/s	No Chance	No
2021/03/16	74-75 F	-1.0 C	0.804 km (0.5 mi)	100 %	2.0 m/s	Possible	Yes	Fog with and after snow
2021/03/17	76-80 F	-0.5 C	5.2 km (3.2 mi)	98 %	0.2 m/s	Possible	Yes	Hydro 9:15 CST with web cam of cloud
2021/03/18	74-76 F	-4.0 C	18 km (10 mi)	95 %	0.3 m/s	Unlikely	No
2021/03/19	80-75 F	-2.0 C	38 km (24 mi)	90 %	2.1 m/s	No Chance	No	Front 12:05-12:15 UTC, Site Visit
2021/03/20	71-73 F	0.9 C	33.1 km (20.6 mi)	83 %	5.0 m/s	No Chance	No
2021/03/21	77-79 F	2.5 C	42.3 km (26.3 mi)	85 %	2.2 m/s	No Chance	No
2021/03/22	71-75 F	-3.9 C	16.8 km (10.4 mi)	95 %	0.5 m/s	Unlikely	No
2021/03/23	76-80 F	-5.7 C	45.5 km (28.1 mi)	95 %	0.5 m/s	No Chance	No
2021/03/24	68-72 F	-5.3 C	18.8 km (11.7 mi)	83 %	5.6 m/s	Unlikely	No
2021/03/25	68-70 F	-7.3 C	43.0 km (26.7 mi)	82 %	0.1 m/s	No Chance	No
2021/03/26	72-74 F	-2.0 C	27.5 km (17.1 mi)	96 %	2.9 m/s	Unlikely	No
2021/03/27	74-78 F	-0.3 C	10.7 km (6.7 mi)	94 %	0.6 m/s	No Chance	No
2021/03/28	79-83 F	-9.2 C	52.1 km (32.4 mi)	83 %	0.2 m/s	No Chance	No
2021/03/29	79-85 F	1.4 C	17.1 km (10.6 mi)	88 %	3.5 m/s	No Chance	No
2021/03/30	65-66 F	-4.6 C	1.6 km (1.0 mi)	64 %	7.0 m/s

Case 03/10 - 03/11

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