Two Pacific Storms to Impact the Western U.S. This Week

Two Pacific storms will impact the western U.S. this week with low elevation rain, mountain snow, and gusty winds. The second storm arriving Tuesday night into Wednesday may bring heavy to excessive rainfall and possible flooding for coastal central and southern California, while heavy mountain snow is possible across the Sierra Nevada mountains. Read More >

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Aviation Forecast Discussion

.AVIATION... 18Z TAFS: Rain is filling in across North Idaho and Eastern WA with spotty activity across Central WA. This will result in gradually deterioration across far eastern Washington and north Idaho Sunday afternoon to 2k-3kft. The exception will be at KPUW and KLWS where easterly winds during the day may inhibit MVFR ceilings until after 00Z. Light southeast winds may also allow MVFR stratus to develop at KEAT Sunday morning between 18-22Z with scattered coverage noted on the area cams as of 17z. Rain will slowly taper off west to east but stall over KLWS-KPUW through the much of the period. Models suggest there could be some improvement briefly for KGEG-KSFF-KCOE following the rain but favorable boundary layer winds suggest any breaks will be brief with MVFR or lower ceilings redeveloping. FORECAST CONFIDENCE AND/OR ALTERNATE SCENARIOS: There is moderate confidence for ceilings to gradually to lower to MVFR at KGEG/KSFF/KCOE with lower confidence on the timing for the trend to MVFR for KPUW and KLWS. Low confidence in MVFR conditions for KEAT between 18-22Z with RRFS only indicating a 10% chance. Greatest uncertainty is whether there is a break in the MVFR cigs following the conclusion of the rain before low stratus develops 6-10z. RRFS carries a 50-70% chance for cigs to be 1k ft AGL or lower between KMWH-KGEG during in this time-frame and 40% around KPUW. With KMWH more likely to experience clearing aloft, fog will be favored versus low stratus. /sb ----------------------- 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)

FTUS80 KGEG 152300 AAA
KGEG 152257Z 1523/1618 15010KT 2SM -RA BR SCT008 BKN013 OVC035
     FM160100 20006KT 4SM -RA BR BKN008 OVC015
     FM160600 19006KT 6SM BR SCT008 BKN015
     FM161000 19006KT 4SM BR OVC007
     FM161700 18005KT 6SM BR BKN015 OVC050

Latest Area Terminal Aerodrome Forecasts (TAFs)

FTUS80 KSFF 152300 AAA
KSFF 152258Z 1523/1618 14005KT 3SM -RA BR SCT010 OVC017
     FM160400 18004KT 3SM -RA BR OVC017
     FM160600 22004KT P6SM OVC013
     FM161700 21004KT P6SM BKN019 OVC050

FTUS46 KOTX 151736
TAFCOE
TAF
KCOE 151736Z 1518/1618 10006KT P6SM -RA SCT030 OVC045
     FM152200 12005KT 6SM -RA OVC027
     FM160100 12005KT 4SM -RA OVC013
     FM160800 19006KT 6SM BR OVC010
     FM161600 20004KT P6SM OVC013=

FTUS54 KPUW 151739
KPUW 151736Z 1518/1618 14010G17KT 6SM -RA OVC060
     FM152300 16006KT 6SM -RA OVC027
     FM160500 VRB03KT 4SM -RA SCT010 OVC015
     FM160700 25004KT 3SM -RA BR SCT008 OVC013
     FM161000 23005KT 6SM -RA BR OVC015

FTUS46 KOTX 151736
TAFLWS
TAF
KLWS 151736Z 1518/1618 10006KT P6SM -RA OVC060
     FM152300 VRB04KT 6SM -RA OVC035
     FM160300 15004KT 5SM -RA OVC025
     FM160600 16004KT 6SM -RA OVC018
     FM161100 20004KT 4SM -RA OVC015=

FTUS80 KMWH 151739 RRA
KMWH 151736Z 1518/1618 15007KT P6SM SCT050 OVC090 PROB30 1518/1520
      -RA OVC050
     FM152000 19008KT P6SM -RA OVC035
     FM152300 16010KT P6SM OVC045
     FM160100 17009KT P6SM SCT060 BKN120
     FM160800 21004KT P6SM FEW050 SCT150
     FM160900 VRB03KT 4SM BCFG SCT002

FTUS80 KEAT 151745 CCA
KEAT 151742Z 1518/1618 14006KT P6SM SCT020 BKN060 PROB30 1518/1522
      P6SM -RA BKN020
     FM160300 VRB04KT P6SM FEW040 SCT070 BKN200
     FM160900 30005KT P6SM FEW070 BKN200

FTUS80 KSEA 152321 RRR
KSEA 152320Z 1600/1706 18008KT P6SM -SHRA FEW030 BKN100
     FM160500 16007KT P6SM BKN045
     FM161300 15006KT P6SM FEW025 BKN050
     FM161800 20005KT P6SM BKN070

FTUS80 KBOI 152239 AAA
KBOI 152237Z 1523/1618 14014G22KT P6SM BKN080
     FM160000 13008KT P6SM OVC080
     FM160500 VRB05KT P6SM OVC080
     FM161300 27004KT P6SM -RA OVC060

FTUS80 KPDT 152324 RRE
KPDT 152321Z 1600/1624 18006KT P6SM -SHRA OVC035
     FM160500 16005KT 6SM BR OVC030
     FM161200 25004KT P6SM OVC050
     FM161700 30003KT P6SM OVC100

FTUS80 KALW 152324
KALW 152321Z 1600/1624 17010KT P6SM -SHRA OVC040
     FM160400 17006KT P6SM OVC050
     FM162000 23004KT P6SM OVC050
     FM162300 22003KT P6SM OVC025

FTUS80 KPSC 152324 RRE
KPSC 152321Z 1600/1624 20005KT P6SM VCSH OVC050
     FM161200 VRB03KT P6SM OVC100
     FM161800 25004KT P6SM BKN250
     FM162300 22004KT P6SM BKN100

FTUS80 KYKM 152324 RRG
KYKM 152321Z 1600/1624 24004KT P6SM FEW050 SCT100
     FM161200 27003KT P6SM BKN250
     FM161800 VRB02KT P6SM FEW250

FTUS80 KDLS 152324 RRA
KDLS 152321Z 1600/1624 VRB03KT P6SM BKN050 OVC070 PROB30 1601/1606
      -RA
     FM161200 VRB02KT P6SM BKN100
     FM161800 32002KT P6SM BKN250

FTUS46 KPDT 152321
TAFBDN
TAF
KBDN 152321Z 1600/1624 21009KT P6SM SCT035 OVC050
     FM160200 VRB03KT P6SM SCT035 OVC050
     FM161200 17004KT P6SM OVC060
     FM161800 35006KT P6SM OVC100=

FTUS80 KMSO 152321 RRN
KMSO 152320Z 1600/1624 30006KT P6SM BKN070 BKN120
     FM161100 30002KT 5SM -RA BR BKN030 OVC050

FTUS80 KBTM 152321 RRC
KBTM 152320Z 1600/1624 19010G17KT P6SM SCT150
     FM160200 17005KT P6SM BKN120

FTUS80 KSMN 152321 RRR
KSMN 152320Z 1600/1624 18006KT P6SM BKN150
     FM160800 VRB05KT P6SM BKN100

FTUS80 KGPI 152321 RRH
KGPI 152320Z 1600/1624 16005KT 5SM -RA BKN035 OVC050
     FM160600 23002KT 3SM -RA BR BKN010 OVC030
     FM161000 00000KT 1/2SM -RA FG OVC005

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	2053Z	83	43	24	81		250	7			7			FEW150 BKN250
KSFF	2053Z	84	50	31	82		VRB	7			1 1/2	HZ		FEW030
KCOE	2056Z	82	54	38	81		VRB	5			3	HZ		OVC024
KPUW	2053Z
KLWS	2056Z	90	41	18	86		350	9			10			CLR
KMWH	2052Z	85	40	20	82		200	10			10			CLR
--WA--	Time	T	Td	RH	HI	WC	Dir	Wind	G	PK	Vis	Wx	Pcp	Clouds
KS52	2055Z	89	44	20	85		140	18	26		10			CLR
KOMK	2053Z	91	45	20	87		200	14	21		10			CLR
KS10
KEPH	2053Z	86	46	25	83		150	8	17		10			CLR
K63S	2055Z	84	61	45	84		170	7			8		0.56	CLR
KDEW	2053Z	83	50	32	81			calm			7			CLR
KSKA	1955Z	82	41	24	80		180	5			10			CLR
--ID--	Time	T	Td	RH	HI	WC	Dir	Wind	G	PK	Vis	Wx	Pcp	Clouds
K65S	2055Z	82	59	45	82		360	9			10			CLR
KSZT	2055Z	84	57	40	83		120	5			10			CLR
KMLP	2053Z	69	54	59				calm			10			BKN100
-PDT TAFs-	Time	T	Td	RH	HI	WC	Dir	Wind	G	PK	Vis	Wx	Pcp	Clouds
KPDT	2053Z	85	39	20	82		280	9			10			CLR
KALW	2053Z	85	36	17	82		170	3			10			CLR
KPSC	2053Z	90	32	13	86		230	13			10			CLR
KYKM	2053Z	85	43	23	82		150	10			10			CLR
KDLS	2053Z	82	48	31	81		310	23	32	35	10			CLR
KRDM	2056Z	86	36	17	83						10			CLR
KBDN	2055Z	88	34	15	84		20	13			10			CLR
-MSO TAFs-	Time	T	Td	RH	HI	WC	Dir	Wind	G	PK	Vis	Wx	Pcp	Clouds
KMSO	2053Z	95	56	27	93		310	14	20		10			CLR
KBTM	2053Z	87	52	30	85		140	10	21		10			CLR
KSMN	2056Z	95	53	24	92		100	8			10			CLR
KGPI	2055Z	88	58	36	87		VRB	3			10			CLR
KHRF	2055Z	90	57	33	89		360	13	22		10			CLR
-Misc-	Time	T	Td	RH	HI	WC	Dir	Wind	G	PK	Vis	Wx	Pcp	Clouds
KSEA	2053Z	67	49	53			220	6			10			SCT037 BKN042
KSMP	2056Z	60	49	67							10			CLR
KELN	2053Z	81	41	24	79			calm			10			CLR
KRLD	2055Z	91	37	15	87		210	8			10			CLR
KGIC	2055Z	77	46	34			40	6	9		10			SCT090 SCT120
K1S5	2055Z	85	50	29	83		110	3			10			CLR
KHRI	2053Z	87	40	19	84		270	12			9			CLR
KP69	2052Z	79	65	62				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