Snow Showers and Squalls for Great Lakes and Northern Plains; Critical Fire Weather for Southern California

Winter continues across most of the country with below normal temperatures and gusty winds. Snow showers and squalls will affect the Great Lakes and northern Plains as a couple of cold fronts cross these regions. Winds and dry weather will keep fire weather concerns at critical levels for Southern California through the end of the week. A powerful storm will affect Alaska with heavy snow and winds Read More >

CIGS	VSBY	AAR	Type Approaches	Impact
>040	>10	130+	Visuals
012*-040	>10	112-118	Instrument
012*-040	<10	90-108	Instruments	MIT, TBFM (scheduling/metering)
<012*	>1/2	90-98	Instruments	MIT, TBFM (scheduling/metering)
002-009	½ - 3	78-96	Instruments	MIT, TBFM (metering/scheduling)
<002	<1/2	54-60	Instruments	Tower requires additional spacing on arrival runways due to Tower Departure rule (2 increasing to 3). CATII and CATIII ILS approaches; MIT, GDP, Potential GS

*D10 varies this threshold between 020-012 depending on traffic volume and other operational conditions.

Wind Speed/Direction		AAR	Type Approaches	Impact
25-30kts sustained from 280-300	Xwind	84-114	Visuals	MIT, TBFM (metering/scheduling)
>35kts sustained from 280-300	NW Flow Event	24-48	Instrument/Visuals	GDP, MIT, Potential GS
Gusts >45kts from 280-300	Xwind/NW Flow	24	Instrument/Visuals	Potential GS

S4 VMC: 13R (6MIT), 18R, 17C, 17L = 130/90

S4 LVMC: 13R (6MIT), 18R, 17C, 17L= 116/90

S4 IMC: 13R (6MIT), 18R, 17C, 17L= 108/90

S3 IMC: 18R, 17C, 17L = 98/90

S3 LIMC: 18R, 17C, 17L = 90/90

N4 VMC: 36L, 35C, 35R, 31R (6MIT) = 124/90

N4 LVMC: 36L, 35C, 35R, 31R (6MIT) = 112/90

N4 IMC: 36L, 35C, 35R, 31R (6MIT) = 108/90

N3 IMC: 36L, 35C, 35R = 94/90

N3 LIMC: 36L, 35C, 35R = 88/90

NW2VMC/IMC: 31R, 31L = 48/48 (5MIT on ea)

NW2LIMC: 31R = 24 (Single RWY)

Snow Showers and Squalls for Great Lakes and Northern Plains; Critical Fire Weather for Southern California

DFW Tracon Weather Impacts