Frigid Cold in the East; Snow Continues in the Great Lakes

A frigid cold airmass will continue to bring colder weather across the eastern two thirds of the country early this week. Record low temperatures are expected to be tied or broken across the Southeast and Florida. Periods snow will continue downwind of the Great Lakes and in portions of interior New England through Tuesday afternoon, with several inches of snowfall accumulation expected. Read More >

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Aviation Forecast Discussion

.AVIATION... 12Z TAFS: MVFR to LIFR conditions will continue through the morning thanks to areas of low clouds and fog at GEG/SFF/COE/MWH/PUW/LWS. Slow improvement expected through the day with VFR possible toward 20–03Z. EAT is expected to be VFR. Areas of showers developing around 06-12Z Wednesday from central WA to north ID. .FORECAST CONFIDENCE AND/OR ALTERNATE SCENARIOS: High confidence in degraded conditions at GEG/SFF/COE/MWH/PUW/LWS. Low to moderate confidence in timing of improvement at these Same sites. Moderate to high confidence in VFR at EAT. ----------------------- Confidence descriptors: Low - Less than a 30 percent chance Moderate - 30 to 70 percent chance High - Greater than a 70 percent chance For additional probabilistic information for NWS Spokane airports, please refer to the Aviation Dashboard on our webpage: https:/www.weather.gov/otx/avndashboard &&

Latest GEG Terminal Aerodrome Forecast (TAF)

FTUS44 KGEG 111739
KGEG 111736Z 1118/1218 16005KT 1/4SM FG VV001
     FM111900 13005KT 1SM BR OVC003
     FM112100 VRB04KT P6SM BKN010
     FM120400 04006KT P6SM SCT020 OVC150 PROB30 1206/1209 -RA
     FM120900 04006KT P6SM SCT020 BKN040 OVC060 PROB30 1209/1215
      -RA
     FM121500 04006KT P6SM BKN050 OVC100

Latest Area Terminal Aerodrome Forecasts (TAFs)

FTUS44 KSFF 111739
KSFF 111736Z 1118/1218 00000KT 3/4SM BR OVC004
     FM111900 VRB03KT P6SM BKN010
     FM112100 06004KT P6SM SCT020
     FM120200 05005KT P6SM BKN180
     FM120500 05005KT P6SM FEW030 BKN100 OVC150 PROB30 1206/1209
      -RA
     FM120900 05005KT P6SM SCT025 BKN040 OVC060 PROB30 1209/1215
      -RA

FTUS46 KOTX 111736
TAFCOE
TAF
KCOE 111736Z 1118/1218 15003KT P6SM FEW015 SCT200
     FM120100 06007KT P6SM BKN150 OVC200
     FM120900 02010KT P6SM BKN050 OVC100
      PROB30 1209/1212 -RA OVC050
     FM121200 02012KT P6SM SCT030 OVC050
      PROB30 1212/1215 -RA
     FM121500 02012KT P6SM BKN050 OVC080=

FTUS54 KPUW 111739
KPUW 111736Z 1118/1218 VRB04KT P6SM BKN025
     FM111900 VRB04KT P6SM SCT025
     FM112300 12008KT P6SM FEW100 BKN200
     FM120300 10013KT P6SM SCT100 BKN150 OVC200
     FM120700 10013KT P6SM OVC070
     FM121100 12010KT P6SM SCT080 OVC120

FTUS46 KOTX 111736
TAFLWS
TAF
KLWS 111736Z 1118/1218 00000KT 1 1/2SM BR OVC003
     FM111930 VRB02KT 3SM BR BKN008
     FM112100 VRB03KT P6SM FEW015 BKN200
     FM120300 16004KT P6SM SCT050 BKN150 OVC200
     FM120600 11006KT P6SM OVC090
     FM121000 11006KT P6SM OVC140=

FTUS44 KMWH 111739
KMWH 111736Z 1118/1218 02007KT 1/4SM FG VV002
     FM111900 02006KT 2SM BR OVC004
     FM112100 02008KT P6SM FEW010 BKN200
     FM120300 02007KT P6SM SCT100 BKN140 OVC180
     FM120700 01006KT P6SM SCT060 BKN080 OVC100 PROB30 1208/1214
      -RA
     FM121500 02005KT P6SM OVC120

FTUS80 KEAT 111739 RRA
KEAT 111736Z 1118/1218 10005KT 1/4SM FG VV001
     FM111900 10007KT 1 1/2SM BR BKN003
     FM112030 10007KT P6SM FEW008 SCT200
     FM120100 10005KT P6SM SCT160 BKN200
     FM120600 30005KT P6SM BKN100 OVC140 PROB30 1208/1214 -RA
      BKN080 OVC100
     FM121600 30005KT P6SM OVC120

FTUS80 KSEA 111742 RRC
KSEA 111739Z 1118/1224 01005KT P6SM FEW010 FEW220
     FM112100 35006KT P6SM SCT050 BKN250
     FM120700 05003KT P6SM OVC120
     FM121200 11004KT P6SM VCSH OVC050
     FM121800 11007KT 6SM BR VCSH OVC040

FTUS44 KBOI 111721
KBOI 111720Z 1118/1218 13003KT P6SM SKC
     FM112100 VRB04KT P6SM FEW200
     FM120300 13005KT P6SM SCT150

FTUS54 KPDT 111721 RRA
KPDT 111720Z 1118/1218 VRB05KT P6SM BKN060 OVC250
     FM112000 33005KT P6SM FEW080 SCT150 BKN250
     FM120200 02005KT P6SM FEW080 BKN150 OVC250
     FM121000 08005KT P6SM OVC050
      TEMPO 1211/1215 6SM BR OVC009

FTUS80 KALW 111721
KALW 111720Z 1118/1218 19005KT P6SM FEW030 OVC040
     FM111900 32005KT P6SM FEW080 SCT150 BKN250
     FM120200 18004KT P6SM FEW080 BKN150 OVC250

FTUS80 KPSC 111721 RRO
KPSC 111720Z 1118/1218 36003KT 1/2SM FG VV002
     FM111900 33003KT 6SM BR BKN250
     FM120300 33003KT 6SM BR BKN100 OVC250
      TEMPO 1211/1215 4SM BR OVC050

FTUS80 KYKM 111721 RRS
KYKM 111720Z 1118/1218 VRB02KT P6SM BKN250
     FM120100 27004KT 6SM BR SCT035 BKN150 OVC250
     FM121500 28003KT 1/2SM FG OVC009

FTUS54 KDLS 111721
KDLS 111720Z 1118/1218 VRB03KT 6SM BR SCT007 OVC009
     FM111900 VRB03KT P6SM SCT025 BKN050
     FM120000 12003KT P6SM BKN100 OVC250

FTUS46 KPDT 111720
TAFBDN
TAF
KBDN 111720Z 1118/1218 20007KT P6SM FEW050 FEW250
     FM112200 21006KT P6SM BKN120 OVC250=

FTUS80 KMSO 111736 RRD
KMSO 111734Z 1118/1218 30004KT P6SM SCT050
     FM120500 00000KT 5SM BR BKN100
     FM120800 VRB03KT 3SM BR VCSH OVC060
     FM121400 VRB03KT 5SM BR SCT005 BKN120

FTUS43 KBTM 111736
KBTM 111734Z 1118/1218 30002KT P6SM BKN050
     FM112000 27008KT P6SM SCT120
     FM112300 16004KT P6SM SCT100
     FM120700 VRB03KT P6SM BKN100

FTUS80 KSMN 111736 RRF
KSMN 111734Z 1118/1218 00000KT P6SM BKN080
     FM120400 VRB03KT P6SM BKN120

FTUS80 KGPI 111736 RRB
KGPI 111734Z 1118/1218 00000KT P6SM BKN050
     FM112100 VRB03KT P6SM SCT050
     FM120800 00000KT P6SM OVC050
     FM121100 00000KT 5SM -RA OVC030

Raw METARs for WFO OTX CWA and Surrounding Areas

--TAFs--	Time	T	Td	RH	HI	WC	Dir	Wind	G	PK	Vis	Wx	Pcp	Clouds
KGEG	1810Z	39	39	100		35	190	6			1	BR		OVC002
KSFF	1810Z	43	41	93		39	250	6			8			CLR
KCOE	1810Z	46	45	93		44	240	5			10			FEW012
KPUW	1810Z	52	45	77				calm			10			CLR
KLWS	1814Z	45	45	100				calm			1 1/2	BR		OVC002
KMWH	1805Z	37	37	100		30	50	10			1	BR		OVC002
KEAT	1811Z	38	38	100			120	3			1/4	FG		VV001
--WA--	Time	T	Td	RH	HI	WC	Dir	Wind	G	PK	Vis	Wx	Pcp	Clouds
KS52	1755Z	37				31	130	8			10			BKN100 BKN120
KOMK	1805Z	39	37	93			80	3			10			OVC011
KS10
KEPH	1805Z	39	37	93		34	40	7			6	BR		OVC005
K63S	1755Z	41	41	100				calm			7			OVC018
KDEW	1810Z	41	39	93				calm			4	BR		OVC005
KSKA	1815Z	41	39	93		38	200	5			1 3/8	BR		OVC002
--ID--	Time	T	Td	RH	HI	WC	Dir	Wind	G	PK	Vis	Wx	Pcp	Clouds
K65S	1755Z	45	41	87				calm			10			FEW034
KSZT	1750Z	45	41	87		42	260	6			10			OVC022
KMLP	1810Z	36	34	93		32	210	5			10			BKN007
-PDT TAFs-	Time	T	Td	RH	HI	WC	Dir	Wind	G	PK	Vis	Wx	Pcp	Clouds
KPDT	1805Z	54	43	67				calm			10			CLR
KALW	1805Z	54	43	67			290	6			10			CLR
KPSC	1810Z	43	42	97			320	3			2 1/2	BR		OVC002
KYKM	1805Z	45	37	76				calm			10			CLR
KRDM	1805Z	55	37	51			200	8			10			CLR
KBDN	1755Z	48	37	66				calm			10			CLR
-MSO TAFs-	Time	T	Td	RH	HI	WC	Dir	Wind	G	PK	Vis	Wx	Pcp	Clouds
KMSO	1810Z	43	41	93			160	3			10			FEW002
KBTM	1810Z	54	30	41			240	12	17		10			SCT050
KSMN	1810Z	45	28	53				calm			10			BKN075
KGPI	1810Z	41	39	93				calm			10			FEW050
KHRF	1755Z	55	43	63			340	3			10			SCT060
-Misc-	Time	T	Td	RH	HI	WC	Dir	Wind	G	PK	Vis	Wx	Pcp	Clouds
KSEA	1805Z	50	43	76		47	30	7			10			CLR
KSMP	1756Z	38	31	76				calm			10			CLR
KELN	1805Z	46	36	66				calm			10			CLR
KRLD	1755Z	41	41	100				calm			1 1/4	BR		OVC002
KGIC	1755Z	48	43	82			60	3			10			CLR
KHRI	1805Z	52	45	77			340	6			10			CLR
KP69	1752Z	50	48	93				calm

Lowest Expected Flight Category Forecasts - EXPERIMENTAL

•This site is for informational purposes. It should be used with other preflight information sources needed to satisfy all the requirements of 14 CFR 91.103. It is NOT designed to be used as a primary or sole source of information for preflight action. Refer to Flight Service for more information.

0-1 hr Ceiling Forecast	0-1 hr Visibility Forecast

1-2 hr Ceiling Forecast	1-2 hr Visibility Forecast

2-3 hr Ceiling Forecast	2-3 hr Visibility Forecast

3-4 hr Ceiling Forecast	3-4 hr Visibility Forecast

4-5 hr Ceiling Forecast	4-5 hr Visibility Forecast

5-6 hr Ceiling Forecast	5-6 hr Visibility Forecast

6-12 hr Ceiling Forecast	6-12 hr Visibility Forecast

12-18 hr Ceiling Forecast	12-18 hr Visibility Forecast

18-24 hr Ceiling Forecast	18-24 hr Visibility Forecast

HREF Ceiling Probabilities - EXPERIMENTAL

•These plots are produced by HREF ensemble guidance and are for informational purposes. It should be used with other preflight information sources needed to satisfy all the requirements of 14 CFR 91.103. It is NOT designed to be used as a primary or sole source of information for preflight action. Refer to Flight Service for more information.

0-1 hr Probability of Ceiling < 1000 ft	0-1 hr Probability of Ceiling < 2000 ft	0-1 hr Probability of Ceiling < 3000 ft

1-2 hr Probability of Ceiling < 1000 ft	1-2 hr Probability of Ceiling < 2000 ft	1-2 hr Probability of Ceiling < 3000 ft

2-3 hr Probability of Ceiling < 1000 ft	2-3 hr Probability of Ceiling < 2000 ft	2-3 hr Probability of Ceiling < 3000 ft

3-4 hr Probability of Ceiling < 1000 ft	3-4 hr Probability of Ceiling < 2000 ft	3-4 hr Probability of Ceiling < 3000 ft

4-5 hr Probability of Ceiling < 1000 ft	4-5 hr Probability of Ceiling < 2000 ft	4-5 hr Probability of Ceiling < 3000 ft

5-6 hr Probability of Ceiling < 1000 ft	5-6 hr Probability of Ceiling < 2000 ft	5-6 hr Probability of Ceiling < 3000 ft

6-12 hr Probability of Ceiling < 1000 ft	6-12 hr Probability of Ceiling < 2000 ft	6-12 hr Probability of Ceiling < 3000 ft

12-18 hr Probability of Ceiling < 1000 ft	12-18 hr Probability of Ceiling < 2000 ft	12-18 hr Probability of Ceiling < 3000 ft

18-24 hr Probability of Ceiling < 1000 ft	18-24 hr Probability of Ceiling < 2000 ft	18-24 hr Probability of Ceiling < 3000 ft

HREF Visibility Probabilities - EXPERIMENTAL

0-1 hr Probability of Visibility < 0.25 mi	0-1 hr Probability of Visibility < 0.5 mi	0-1 hr Probability of Visibility < 1 mi

1-2 hr Probability of Visibility < 0.25 mi	1-2 hr Probability of Visibility < 0.5 mi	1-2 hr Probability of Visibility < 1 mi

2-3 hr Probability of Visibility < 0.25 mi	2-3 hr Probability of Visibility < 0.5 mi	2-3 hr Probability of Visibility < 1 mi

3-4 hr Probability of Visibility < 0.25 mi	3-4 hr Probability of Visibility < 0.5 mi	3-4 hr Probability of Visibility < 1 mi

4-5 hr Probability of Visibility < 0.25 mi	4-5 hr Probability of Visibility < 0.5 mi	4-5 hr Probability of Visibility < 1 mi

5-6 hr Probability of Visibility < 0.25 mi	5-6 hr Probability of Visibility < 0.5 mi	5-6 hr Probability of Visibility < 1 mi

6-12 hr Probability of Visibility < 0.25 mi	6-12 hr Probability of Visibility < 0.5 mi	6-12 hr Probability of Visibility < 1 mi

12-18 hr Probability of Visibility < 0.25 mi	12-18 hr Probability of Visibility < 0.5 mi	12-18 hr Probability of Visibility < 1 mi

18-24 hr Probability of Visibility < 0.25 mi	18-24 hr Probability of Visibility < 0.5 mi	18-24 hr Probability of Visibility < 1 mi


0-1 hr Probability of Visibility < 2 mi	0-1 hr Probability of Visibility < 4 mi

1-2 hr Probability of Visibility < 2 mi	1-2 hr Probability of Visibility < 4 mi

2-3 hr Probability of Visibility < 2 mi	2-3 hr Probability of Visibility < 4 mi

3-4 hr Probability of Visibility < 2 mi	3-4 hr Probability of Visibility < 4 mi

4-5 hr Probability of Visibility < 2 mi	4-5 hr Probability of Visibility < 4 mi

5-6 hr Probability of Visibility < 2 mi	5-6 hr Probability of Visibility < 4 mi

6-12 hr Probability of Visibility < 2 mi	6-12 hr Probability of Visibility < 4 mi

12-18 hr Probability of Visibility < 2 mi	12-18 hr Probability of Visibility < 4 mi

18-24 hr Probability of Visibility < 2 mi	18-24 hr Probability of Visibility < 4 mi