NBM Guidance for PORTLAND (KPDX)
45.5958N 122.6092W
Elevation 26 ft
(Nearest NBM location, approximately 3.1 miles ENE)
HOURLY TO 24 HOURS:
KPDX NBM V5.0 NBH GUIDANCE 9/07/2026 2300 UTC
UTC 00 01 02 03 04 05 06 07 08 09 10 11 12 13 14 15 16 17 18 19 20 21 22 23 00 Time (UTC)
PDT 17 18 19 20 21 22 23 00 01 02 03 04 05 06 07 08 09 10 11 12 13 14 15 16 17 Time (PDT)
TMP 69 69 67 64 62 61 60 59 58 57 56 55 55 55 54 55 58 62 65 69 73 76 78 79 79 Temperature(F)
TSD 2 2 1 1 1 1 1 1 1 1 1 1 1 1 1 2 2 2 2 2 1 2 2 2 2 SD of temp(F)
DPT 52 52 53 54 54 55 55 54 54 54 53 53 52 52 52 52 53 53 54 54 54 53 53 53 54 Dew point temp(F)
DSD 1 1 2 2 2 1 1 1 1 1 1 1 1 1 1 1 1 1 2 2 2 2 3 3 3 Dew point temp SD(F)
WBG 64 62 63 59 59 58 58 57 56 56 54 54 53 53 53 55 57 59 63 67 70 70 70 70 70 Wet bulb temp(F)
SKY 11 5 7 6 7 4 4 4 3 1 3 4 12 24 32 27 17 7 6 10 8 7 5 4 3 Sky cover(%)
SSD 10 8 9 6 7 5 4 5 4 1 4 5 23 35 34 34 29 10 7 9 6 7 5 4 4 Sky cover SD(%)
WDR 32 32 32 33 34 34 33 33 33 32 34 35 34 34 34 33 33 33 33 33 33 34 34 34 34 Wind dir (deg)
WSP 3 3 0 0 3 3 4 4 4 4 4 4 4 3 3 4 4 4 5 6 7 8 8 8 8 Wind spd (kts)
WSD 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 1 1 1 1 1 1 2 1 1 Wind spd SD(kts)
GST 5 4 3 4 5 5 5 5 5 5 5 4 4 4 4 5 5 5 7 7 8 10 11 12 13 Wind gust(kts)
GSD 3 3 3 3 3 3 3 3 2 2 1 2 1 1 1 1 1 1 1 2 2 3 3 3 2 Wind gust SD(kts)
P01 0 1 0 1 1 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 1-hr PoP(%)
P06 1 0 0 0 6-hr PoP(%)
Q01 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 1-hr QPF (.01")
T01 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 1-hr tstm prob(%)
PZR 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 Cond prob ZR(%)
PSN 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 Cond prob Snow(%)
PPL 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 Cond prob Sleet/IP(%)
PRA 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 Cond prob of rain(%)
S01 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 1-hr snow(1/10in)
SLV 74 74 75 75 76 76 76 76 77 76 76 76 76 77 77 78 78 79 79 80 80 80 81 82 83 Snow level 100s feet MSL
I01 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 1-hr ice(1/100in)
CIG -88-88-88-88-88-88-88-88-88-88-88-88-88-88-88-88-88-88-88-88-88-88-88-88-88 Ceiling height*
MVC 0 0 0 0 0 0 0 0 0 0 0 0 0 5 9 12 9 5 1 0 0 0 0 0 0 Prob cig<=3000ft(%) MVFR
IFC 0 0 0 0 0 0 0 0 0 0 0 0 0 4 7 7 5 2 0 0 0 0 0 0 0 Prob cig<1000ft(%) IFR
LIC 0 0 0 0 0 0 0 0 0 0 0 0 0 3 4 4 2 0 0 0 0 0 0 0 0 Prob cig<500ft(%) LIFR
LCB 90 80 90 60-88-88240240270270270130140100100120120270280270270280280-88-88 Lowest cloud base*
VIS 100100100100100100100100100100100100100100100100100100100100100100100100100 Visibility*
MVV 0 0 0 0 0 0 0 0 0 1 1 2 3 3 5 5 4 1 0 0 0 0 0 0 0 Prob vsby<=5mi(%) MVFR
IFV 0 0 0 0 0 0 0 0 0 0 0 0 1 1 2 2 2 0 0 0 0 0 0 0 0 Prob vsby<3mi(%) IFR
LIV 0 0 0 0 0 0 0 0 0 0 0 0 0 0 1 1 0 0 0 0 0 0 0 0 0 Prob vsby<1mi(%) LIFR
MHT 42 35 16 6 4 4 5 4 4 4 4 4 4 4 4 6 8 12 16 21 28 31 34 33 28 MixHgt 100s feet AGL
TWD 34 35 35 35 35 35 35 35 34 34 35 36 35 35 35 36 36 1 0 2 2 2 2 1 0 Transport wind dir
TWS 5 5 6 6 7 7 8 6 6 5 5 4 4 4 4 4 4 4 5 6 7 8 8 9 9 Transport wind spd(kts)
SOL 44 24 8 3 2 2 1 0 0 0 0 0 0 0 0 15 30 45 58 74 78 76 71 61 48 Solar rad (10s W/m2)
3-HOURLY TO 60 HOURS:
KPDX NBM V5.0 NBS GUIDANCE 9/07/2026 2300 UTC
DT /SEP 8 /SEP 9 /SEP 10
UTC 03 06 09 12 15 18 21 00 03 06 09 12 15 18 21 00 03 06 09 12 15 18 21 Time (UTC)
PDT 20 23 02 05 08 11 14 17 20 23 02 05 08 11 14 17 20 23 02 05 08 11 14 Time (PDT)
FHR 04 07 10 13 16 19 22 25 28 31 34 37 40 43 46 49 52 55 58 61 64 67 70 Forecast Hour
TXN 54 80 56 84 59 Max/Min Temp(F)
XND 2 2 2 2 2 SD of max/min temps(F)
TMP 64 60 57 55 55 65 76 79 71 64 59 56 57 69 80 84 74 66 61 59 60 66 72 Temperature(F)
TSD 1 1 1 1 2 2 2 2 2 2 2 2 2 2 2 3 2 2 2 2 1 2 3 SD of temp(F)
DPT 54 55 54 52 52 54 53 54 54 54 53 51 51 53 53 53 55 56 55 54 55 56 55 Dew point temp(F)
DSD 2 1 1 1 1 2 2 3 2 2 2 2 2 3 3 3 3 3 2 1 1 2 3 Dew point temp SD(F)
WBG 59 58 56 53 55 63 70 70 63 59 56 54 55 66 73 72 66 61 59 56 58 64 69 Wet bulb temp(F)
SKY 6 4 1 12 27 6 7 3 9 7 3 8 13 5 6 4 12 15 7 24 38 61 45 Sky cover(%)
SSD 6 4 1 23 34 7 7 4 7 6 4 6 9 7 6 5 21 17 6 22 26 18 23 Sky cover SD(%)
WDR 33 33 32 34 33 33 34 34 34 33 33 34 36 34 33 33 33 33 35 36 35 32 32 Wind dir (deg)
WSP 0 4 4 4 4 5 8 8 6 5 6 5 4 4 5 6 3 0 0 0 0 4 7 Wind spd (kts)
WSD 2 2 2 2 2 1 1 1 1 2 2 2 2 2 2 2 2 2 3 2 2 2 3 Wind spd SD(kts)
GST 4 5 5 4 5 7 10 13 10 6 8 6 4 5 7 9 5 2 3 3 3 5 10 Wind gust(kts)
GSD 3 3 2 1 1 1 3 2 3 2 3 2 2 2 2 2 2 3 3 2 1 2 4 Wind gust SD(kts)
P06 1 0 0 0 0 0 0 0 0 0 0 6-hr PoP(%)
P12 1 0 0 0 0 12-hr PoP(%)
Q06 0 0 0 0 0 0 0 0 0 0 0 6-hr QPF(.01in)
Q12 0 0 0 0 0 12-hr QPF(.01in)
DUR 0 0 0 0 0 Duration of precip(hrs)
T03 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 3-hr Tstm prob(%)
T06 0 0 0 0 0 0 0 0 0 0 0 6-hr Tstm prob(%)
T12 0 0 0 0 0 12-hr Tstm prob(%)
PZR 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 Cond prob ZR(%)
PSN 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 Cond prob Snow(%)
PPL 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 Cond prob Sleet/IP(%)
PRA 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 Cond prob of rain(%)
S06 0 0 0 0 0 0 0 0 0 0 0 6-hr snow(1/10in)
SLV 75 76 76 76 78 79 80 83 84 86 86 87 89 91 94 95 96 98100110110110 89 Snow level 100s feet MSL
I06 0 0 0 0 0 0 0 0 0 0 0 6-hr ice(1/100in)
CIG -88-88-88-88-88-88-88-88-88-88-88-88-88-88-88-88-88-88-88-88-88-88-88 Ceiling height*
IFC 0 0 0 0 7 0 0 0 0 0 0 7 13 2 0 0 0 0 0 7 11 2 0 Prob cig<1000ft(%) IFR
LCB 60240270140120280280-88-88-88280270160-88-88-88-88-88-88-88100 70 40 Lowest cloud base*
VIS 100100100100100100100100100100100100100100100100100100100100100100100 Visibility*
IFV 0 0 0 1 2 0 0 0 0 0 0-99-99-99-99-99-99-99-99-99-99-99-99 Prob vsby<3mi(%) IFR
MHT 6 5 4 4 6 16 31 28 6 4 4 3 4 14 29 35 4 4 4 4 10 28 44 MixHgt 100s feet AGL
TWD 35 35 34 35 36 0 2 0 35 36 36 1 1 3 34 32 33 34 34 34 33 31 30 Transport wind dir
TWS 6 8 5 4 4 5 8 9 10 7 6 5 4 5 5 6 7 5 4 3 3 6 11 Transport wind spd(kts)
SOL 3 1 0 0 15 58 76 48 4 2 0 0 14 56 76 55 8 4 0 0 2 20 47 Solar rad (10s W/m2)
DAILY TO 7 DAYS:
KPDX NBM V5.0 NBE GUIDANCE 9/07/2026 2300 UTC
TUE 08 |WED 09 |THU 10 |FRI 11 |SAT 12 |SUN 13 |MON 14 |TUE 15 CLIMO
UTC 12| 00 12| 00 12| 00 12| 00 12| 00 12| 00 12| 00 12 Time (UTC)
PDT 05 17 05 17 05 17 05 17 05 17 05 17 05 17 05 Time (PDT)
FHR 13| 25 37| 49 61| 73 85| 97 109|121 133|145 157|169 181 Forecast Hour
TXN 54| 80 56| 84 59| 75 54| 70 55| 68 55| 72 55| 76 57 52 76 Max/Min Temp(F)
XND 2| 2 2| 2 2| 3 2| 3 2| 5 2| 6 3| 6 3 SD of max/min temps(F)
TMP 55| 79 56| 84 59| 71 54| 66 55| 64 55| 69 55| 74 57 Temperature(F)
TSD 1| 2 2| 3 2| 4 2| 4 2| 6 2| 7 3| 7 4 SD of temp(F)
DPT 52| 54 51| 53 54| 52 51| 49 52| 51 52| 50 49| 48 49 Dew point temp(F)
DSD 1| 3 2| 3 1| 4 1| 3 2| 3 2| 5 4| 5 4 Dew point temp SD(F)
WBG 53| 70 54| 72 56| 65 52| 60 54| 59 53| 63 53| 65 53 Wet bulb temp(F)
SKY 12| 3 8| 4 24| 27 39| 40 72| 51 51| 23 39| 19 35 Sky cover(%)
SSD 23| 4 6| 5 22| 31 27| 24 31| 32 30| 23 24| 28 30 Sky cover SD(%)
WDR 34| 34 34| 33 36| 32 9| 33 19| 27 18| 32 35| 34 2 Wind dir (deg)
WSP 4| 8 5| 6 0| 10 0| 4 4| 4 3| 5 5| 8 4 Wind spd (kts)
WSD 2| 1 2| 2 2| 2 2| 3 3| 3 3| 3 3| 3 3 Wind spd SD(kts)
GST 4| 13 6| 9 3| 15 3| 5 4| 6 3| 7 5| 12 5 Wind gust(kts)
GSD 1| 2 2| 2 2| 3 2| 3 4| 3 4| 5 4| 5 4 Wind gust SD(kts)
P12 1| 0 0| 0 0| 0 2| 4 22| 51 27| 18 12| 8 6 26 5 12-hr PoP(%)
Q12 0| 0 0| 0 0| 0 0| 0 0| 3 0| 0 0| 0 0 12-hr QPF(.01in)
Q24 | 0| 0| 0| 0| 3| 0| 0 30 24-hr QPF(.01in)
DUR 0| 0 0| 0 0| 0 0| 0 0| 1 0| 0 0| 0 0 Duration of precip(hrs)
T12 0| 0 0| 0 0| 1 0| 1 8| 23 8| 4 2| 2 3 12-hr Tstm prob(%)
PZR 0| 0 0| 0 0| 0 0| 0 0| 0 0| 0 0| 0 0 Cond prob ZR(%)
PSN 0| 0 0| 0 0| 0 0| 0 0| 0 0| 0 0| 0 0 Cond prob Snow(%)
PPL 0| 0 0| 0 0| 0 0| 0 0| 0 0| 0 0| 0 0 Cond prob Sleet/IP(%)
PRA 0| 0 0| 0 0| 0 3| 14 29| 35 8| 7 3| 4 3 Cond prob of rain(%)
S12 0| 0 0| 0 0| 0 0| 0 0| 0 0| 0 0| 0 0 12-hr snow(1/10in)
S24 | 0| 0| 0| 0| 0| 0| 0 24-hr snow(1/10in)
SLV 76| 83 87| 95 110| 76 63| 69 66| 71 71| 75 73| 80 82 Snow level 100s feet MSL
I12 0| 0 0| 0 0| 0 0| 0 0| 0 0| 0 0| 0 0 12-hr ice(1/100in)
SOL 3| 46 0| 50 3| 29 6| 31 2| 18 4| 41 5| 41 5 Solar rad (10s W/m2)
DAY 8, 9 AND 10:
KPDX NBM V5.0 NBX GUIDANCE 9/07/2026 2300 UTC
WED 16| THU 17| FRI 18
UTC 00 12 |00 12 |00 12 Time (UTC)
PDT 17 05 |17 05 |17 05 Time (PDT)
FHR 193 205|217 229|241 253 Forecast Hour
TXN 79 58| 79 59| 80 58 Max/Min Temp(F)
XND 7 3| 8 3| 7 4 SD of max/min temps(F)
TMP 78 58| 77 59| 78 58 Temperature(F)
TSD 8 3| 9 4| 9 3 SD of temp(F)
DPT 49 50| 50 51| 50 52 Dew point temp(F)
DSD 4 4| 4 4| 5 4 Dew point temp SD(F)
WBG 68 54| 68 55| 68 56 Wet bulb temp(F)
SKY 29 40| 16 35| 24 38 Sky cover(%)
SSD 32 31| 13 11| 13 9 Sky cover SD(%)
WDR 35 1| 1 2| 34 34 Wind dir (deg)
WSP 7 4| 6 3| 5 0 Wind spd (kts)
WSD 3 3| 3 3| 3 3 Wind spd SD(kts)
GST 9 4| 8 3| 7 3 Wind gust(kts)
GSD 6 4| 5 4| 5 3 Wind gust SD(kts)
P12 2 4| 4 2| 1 3 12-hr PoP(%)
Q12 0 0| 0 0| 0 0 12-hr QPF(.01in)
Q24 0| 0| 0 24-hr QPF(.01in)
DUR 0 0| 0 0| 0 0 Duration of precip(hrs)
PZR 0 0| 0 0| 0 0 Cond prob ZR(%)
PSN 0 0| 0 0| 0 0 Cond prob Snow(%)
PPL 0 0| 0 0| 0 0 Cond prob Sleet/IP(%)
PRA 1 2| 4 1| 1 5 Cond prob of rain(%)
S12 0 0| 0 0| 0 0 12-hr snow(1/10in)
S24 0| 0| 0 24-hr snow(1/10in)
SLV 87 87| 91 93| 95 95 Snow level 100s feet MSL
I12 0 0| 0 0| 0 0 12-hr ice(1/100in)
SOL 13 13| 26 15| 28 16 Solar rad (10s W/m2)
STANDARD DEVIATION AND THRESHOLD PROBABILITIES:
KPDX NBM V5.0 NBP GUIDANCE 9/07/2026 1900 UTC
TUE 08| WED 09| THU 10| FRI 11| SAT 12| SUN 13| MON 14| TUE 15| WED 16|
UTC 12| 00 12| 00 12| 00 12| 00 12| 00 12| 00 12| 00 12| 00 12| 00 Time (UTC)
PDT 05| 17 05| 17 05| 17 05| 17 05| 17 05| 17 05| 17 05| 17 05| 17 Time (PDT)
FHR 17| 29 41| 53 65| 77 89|101 113|125 137|149 161|173 185|197 209|221 Forecast Hour
TXNMN 56| 80 57| 84 60| 75 55| 70 56| 68 56| 72 56| 76 58| 79 58| 79 Mean min/max temp(F)
TXNSD 2| 2 2| 2 2| 3 2| 3 2| 5 2| 6 3| 6 3| 7 3| 7 SD min/max temp(F)
TXNP1 54| 78 54| 82 57| 72 53| 66 54| 62 53| 65 53| 68 54| 70 54| 70 10th percentile min/max temp(F)
TXNP2 54| 79 55| 83 58| 73 54| 68 55| 65 54| 68 54| 71 56| 75 56| 75 25th percentile min/max temp(F)
TXNP5 57| 80 59| 84 61| 75 55| 70 56| 68 56| 72 56| 77 57| 80 59| 80 50th percentile min/max temp(F)
TXNP7 58| 81 60| 86 62| 77 56| 72 57| 71 57| 77 58| 81 59| 84 61| 84 75th percentile min/max temp(F)
TXNP9 58| 82 60| 87 62| 79 57| 74 58| 74 58| 79 60| 85 62| 86 62| 86 90th percentile min/max temp(F)
WSPP1 0| 6 3| 3 0| 6 0| 0 0| 0 0| 0 0| 3 0| 0 0| 0 10th percentile wnd(kts)
WSPP2 3| 7 4| 4 0| 7 0| 3 0| 3 0| 3 0| 5 2| 3 0| 3 25th percentile wnd(kts)
WSPP5 3| 8 5| 6 0| 9 0| 4 3| 4 3| 5 4| 7 4| 6 3| 5 50th percentile wnd(kts)
WSPP7 4| 9 5| 7 3| 10 3| 6 5| 6 5| 7 5| 9 5| 8 6| 8 75th percentile wnd(kts)
WSPP9 5| 9 6| 8 4| 11 5| 7 7| 7 6| 9 8| 10 8| 10 8| 10 90th percentile wnd(kts)
W24P1 | 9 | 7 | 9 | 5 | 6 | 6 | 7 | 6 | 10th percentile 24hr sustained wnd exceedance(kts)
W24P2 | 10 | 7 | 10 | 7 | 7 | 7 | 8 | 8 | 25th percentile 24hr sustained wnd exceedance(kts)
W24P5 | 10 | 8 | 12 | 8 | 9 | 9 | 10 | 10 | 50th percentile 24hr sustained wnd exceedance(kts)
W24P7 | 11 | 9 | 14 | 10 | 10 | 11 | 13 | 12 | 75th percentile 24hr sustained wnd exceedance(kts)
W24P9 | 12 | 10 | 15 | 11 | 12 | 14 | 15 | 15 | 90th percentile 24hr sustained wnd exceedance(kts)
G24P1 | 15 | 11 | 14 | 8 | 10 | 10 | 10 | 9 | 10th percentile 24hr wnd gust exceedance(kts)
G24P2 | 15 | 11 | 17 | 10 | 12 | 12 | 12 | 12 | 25th percentile 24hr wnd gust exceedance(kts)
G24P5 | 17 | 13 | 19 | 13 | 14 | 14 | 17 | 16 | 50th percentile 24hr wnd gust exceedance(kts)
G24P7 | 18 | 15 | 22 | 15 | 17 | 17 | 22 | 20 | 75th percentile 24hr wnd gust exceedance(kts)
G24P9 | 20 | 16 | 24 | 18 | 20 | 22 | 25 | 24 | 90th percentile 24hr wnd gust exceedance(kts)
Q24P1 | 0| 0| 0| 0| 0| 0| 0| 0| 10th percentile 24hr QPF(1/100in)
Q24P2 | 0| 0| 0| 0| 0| 0| 0| 0| 25th percentile 24hr QPF(1/100in)
Q24P5 | 0| 0| 0| 0| 6| 0| 0| 0| 50th percentile 24hr QPF(1/100in)
Q24P7 | 0| 0| 0| 0| 26| 0| 0| 0| 75th percentile 24hr QPF(1/100in)
Q24P9 | 0| 0| 0| 22| 78| 24| 0| 0| 90th percentile 24hr QPF(1/100in)
S24P1 | 0| 0| 0| 0| 0| 0| 0| 0| 10th percentile 24hr snow accum(1/10in)
S24P2 | 0| 0| 0| 0| 0| 0| 0| 0| 25th percentile 24hr snow accum(1/10in)
S24P5 | 0| 0| 0| 0| 0| 0| 0| 0| 50th percentile 24hr snow accum(1/10in)
S24P7 | 0| 0| 0| 0| 0| 0| 0| 0| 75th percentile 24hr snow accum(1/10in)
S24P9 | 0| 0| 0| 0| 0| 0| 0| 0| 90th percentile 24hr snow accum(1/10in)
I24P1 | 0| 0| 0| 0| 0| 0| 0| 0| 10th percentile 24hr ice accum(1/100in)
I24P2 | 0| 0| 0| 0| 0| 0| 0| 0| 25th percentile 24hr ice accum(1/100in)
I24P5 | 0| 0| 0| 0| 0| 0| 0| 0| 50th percentile 24hr ice accum(1/100in)
I24P7 | 0| 0| 0| 0| 0| 0| 0| 0| 75th percentile 24hr ice accum(1/100in)
I24P9 | 0| 0| 0| 0| 0| 0| 0| 0| 90th percentile 24hr ice accum(1/100in)
SLPP1 020|018 020|016 017|014 015|010 012|011 014|012 013|011 013|012 013|012 10th percentile MSLP(mb)
SLPP2 021|019 021|017 017|015 016|012 014|014 017|014 015|012 014|012 015|014 25th percentile MSLP(mb)
SLPP5 021|019 022|018 018|015 017|013 016|016 019|016 017|014 016|014 017|015 50th percentile MSLP(mb)
SLPP7 022|020 022|018 019|016 018|015 017|017 020|018 018|015 018|016 019|017 75th percentile MSLP(mb)
SLPP9 022|020 023|019 020|017 020|016 019|018 022|019 020|018 019|018 021|019 90th percentile MSLP(mb)