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 8/30/2026 1100 UTC
UTC 12 13 14 15 16 17 18 19 20 21 22 23 00 01 02 03 04 05 06 07 08 09 10 11 12 Time (UTC)
PDT 05 06 07 08 09 10 11 12 13 14 15 16 17 18 19 20 21 22 23 00 01 02 03 04 05 Time (PDT)
TMP 54 54 54 56 58 60 63 66 68 70 72 74 73 73 72 70 67 65 63 62 60 59 58 57 56 Temperature(F)
TSD 2 2 2 2 2 1 1 1 1 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 SD of temp(F)
DPT 52 52 52 52 52 51 51 51 51 50 50 50 50 49 50 52 52 53 53 53 53 53 52 52 52 Dew point temp(F)
DSD 1 1 1 1 1 1 1 1 1 1 2 2 2 2 2 2 2 1 1 1 1 1 1 1 1 Dew point temp SD(F)
WBG 53 53 54 55 56 57 61 63 65 67 67 66 65 65 64 63 61 60 59 58 57 56 55 55 54 Wet bulb temp(F)
SKY 32 57 73 74 63 58 32 44 39 34 16 16 11 3 6 10 7 8 10 7 24 29 29 32 36 Sky cover(%)
SSD 32 31 26 25 23 27 33 36 41 38 29 32 26 6 23 20 8 10 26 12 37 38 39 38 39 Sky cover SD(%)
WDR 28 27 9 6 36 33 32 32 32 32 33 33 33 33 33 33 33 33 33 33 33 33 33 33 33 Wind dir (deg)
WSP 0 0 0 0 0 3 5 5 6 6 7 8 8 8 7 6 5 5 5 5 6 6 5 5 4 Wind spd (kts)
WSD 1 1 1 1 2 2 1 1 1 1 1 1 1 1 1 1 1 2 2 2 2 2 2 2 2 Wind spd SD(kts)
GST 2 2 2 2 3 5 6 7 8 9 10 12 13 12 11 9 8 7 7 7 7 7 7 6 5 Wind gust(kts)
GSD 2 1 1 1 1 1 1 1 2 2 2 2 2 2 2 2 3 3 3 3 3 3 3 2 2 Wind gust SD(kts)
P01 0 0 0 0 0 1 1 1 1 1 1 2 2 2 3 3 3 3 3 3 2 2 2 2 2 1-hr PoP(%)
P06 1 2 3 3 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 62 61 64 67 69 73 76 86 91 97104105107107107107107106106106105101100 98 96 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 -88130130130130130-88-88-88-88-88-88-88-88-88-88-88-88-88-88-88-88-88-88-88 Ceiling height*
MVC 7 10 13 15 14 12 7 4 1 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 2 Prob cig<=3000ft(%) MVFR
IFC 0 1 2 2 1 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 1 Prob cig<1000ft(%) IFR
LIC 0 0 1 1 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 Prob cig<500ft(%) LIFR
LCB 80 70 80 70 60100 90120190180180180110140140140130130130140120110110180140 Lowest cloud base*
VIS 100100100100100100100100100100100100100100100100100100100100100100100100100 Visibility*
MVV 0 0 2 2 1 1 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 Prob vsby<=5mi(%) MVFR
IFV 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 Prob vsby<3mi(%) IFR
LIV 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 Prob vsby<1mi(%) LIFR
MHT 6 5 6 9 17 25 34 38 39 41 41 40 38 34 21 9 5 5 5 5 5 4 4 4 4 MixHgt 100s feet AGL
TWD 32 33 35 36 34 34 34 34 34 34 34 35 35 35 35 35 35 35 35 35 35 35 35 35 34 Transport wind dir
TWS 3 3 3 3 4 5 5 6 6 6 7 8 9 10 10 9 9 9 7 6 6 6 5 5 4 Transport wind spd(kts)
SOL 0 0 2 15 32 46 57 70 70 70 72 61 48 28 12 3 3 2 2 0 0 0 0 0 0 Solar rad (10s W/m2)
3-HOURLY TO 60 HOURS:
KPDX NBM V5.0 NBS GUIDANCE 8/30/2026 1100 UTC
DT /AUG 30 /AUG 31 /SEP 1 /SEP 2
UTC 15 18 21 00 03 06 09 12 15 18 21 00 03 06 09 12 15 18 21 00 03 06 09 Time (UTC)
PDT 08 11 14 17 20 23 02 05 08 11 14 17 20 23 02 05 08 11 14 17 20 23 02 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 74 55 84 60 73 Max/Min Temp(F)
XND 2 3 3 1 4 SD of max/min temps(F)
TMP 56 63 70 73 70 63 59 56 57 69 80 84 77 68 63 60 61 65 70 72 69 65 62 Temperature(F)
TSD 2 1 2 2 2 2 2 2 2 2 2 3 3 2 2 1 1 2 4 5 3 2 1 SD of temp(F)
DPT 52 51 50 50 52 53 53 52 52 52 52 50 54 56 56 55 55 55 55 54 56 56 55 Dew point temp(F)
DSD 1 1 1 2 2 1 1 1 2 2 2 2 2 2 2 1 1 1 2 3 2 2 2 Dew point temp SD(F)
WBG 55 61 67 65 63 59 56 54 56 65 73 72 68 63 60 58 58 63 66 66 63 60 59 Wet bulb temp(F)
SKY 74 32 34 11 10 10 29 36 29 21 16 39 28 55 42 70 87 81 68 70 83 81 85 Sky cover(%)
SSD 25 33 38 26 20 26 38 39 35 31 33 34 35 30 29 28 20 18 15 15 13 17 12 Sky cover SD(%)
WDR 6 32 32 33 33 33 33 33 33 33 29 30 31 30 24 19 19 21 23 23 25 20 19 Wind dir (deg)
WSP 0 5 6 8 6 5 6 4 2 4 5 5 4 1 3 4 6 7 8 7 6 6 11 Wind spd (kts)
WSD 1 1 1 1 1 2 2 2 2 2 2 2 3 2 3 3 2 2 3 3 3 3 3 Wind spd SD(kts)
GST 2 6 9 13 9 7 7 5 4 5 6 7 6 4 4 5 7 9 10 11 9 9 23 Wind gust(kts)
GSD 1 1 2 2 2 3 3 2 2 2 3 3 4 3 4 3 3 3 4 5 4 6 8 Wind gust SD(kts)
P06 1 2 3 3 2 0 0 0 2 13 31 6-hr PoP(%)
P12 1 3 2 0 13 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 1 1 0 0 1 3-hr Tstm prob(%)
T06 1 0 0 0 0 0 0 0 1 3 2 6-hr Tstm prob(%)
T12 1 0 0 0 3 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 1 3 3 8 9 32 32 36 Cond prob of rain(%)
S06 0 0 0 0 0 0 0 0 0 0 0 6-hr snow(1/10in)
SLV 67 76 97110110110100 96 93 88 96100100 99100100100100 97 95 85 79 80 Snow level 100s feet MSL
I06 0 0 0 0 0 0 0 0 0 0 0 6-hr ice(1/100in)
CIG 130-88-88-88-88-88-88-88-88-88-88-88-88-88-88-88 29-88-88-88 90 35 33 Ceiling height*
IFC 2 0 0 0 0 0 0 1 8 0 0 0 0 0 1 11 18 1 0 0 0 0 0 Prob cig<1000ft(%) IFR
LCB 70 90180110140130110140110100190180120110100150 29 29 40 44 42 35 26 Lowest cloud base*
VIS 100100100100100100100100100100100100100100100100100100100100100100100 Visibility*
IFV 0 0 0 0 0 0 0 0 1 0 0-99-99-99-99-99-99-99-99-99-99-99-99 Prob vsby<3mi(%) IFR
MHT 9 34 41 38 9 5 4 4 5 19 35 38 10 7 7 10 17 29 42 47 24 11 18 MixHgt 100s feet AGL
TWD 36 34 34 35 35 35 35 34 36 7 24 31 33 32 30 24 21 20 22 23 24 21 20 Transport wind dir
TWS 3 5 6 9 9 7 6 4 4 5 5 5 7 7 5 4 6 7 8 7 6 7 11 Transport wind spd(kts)
SOL 15 57 70 48 3 2 0 0 16 58 80 48 4 2 0 0 12 45 72 62 10 5 0 Solar rad (10s W/m2)
DAILY TO 7 DAYS:
KPDX NBM V5.0 NBE GUIDANCE 8/30/2026 1100 UTC
MON 31| TUE 01| WED 02| THU 03| FRI 04| SAT 05| SUN 06| MON CLIMO
UTC 00 12| 00 12| 00 12| 00 12| 00 12| 00 12| 00 12| 00 Time (UTC)
PDT 17 05 17 05 17 05 17 05 17 05 17 05 17 05 17 Time (PDT)
FHR 13 25| 37 49| 61 73| 85 97|109 121|133 145|157 169|181 Forecast Hour
TXN 74 55| 84 60| 73 59| 67 56| 68 55| 71 55| 74 57| 74 53 78 Max/Min Temp(F)
XND 2 3| 3 1| 4 2| 5 2| 4 3| 6 4| 5 3| 6 SD of max/min temps(F)
TMP 73 56| 84 60| 72 61| 64 58| 66 57| 70 57| 73 58| 73 Temperature(F)
TSD 2 2| 3 1| 5 1| 4 2| 4 3| 6 3| 6 4| 6 SD of temp(F)
DPT 50 52| 50 55| 54 55| 57 55| 54 54| 54 54| 54 54| 55 Dew point temp(F)
DSD 2 1| 2 1| 3 2| 3 2| 4 2| 3 3| 4 3| 4 Dew point temp SD(F)
WBG 65 54| 72 58| 66 58| 62 57| 63 55| 64 55| 66 57| 67 Wet bulb temp(F)
SKY 11 36| 39 70| 70 75| 83 78| 66 71| 66 63| 26 50| 29 Sky cover(%)
SSD 26 39| 34 28| 15 25| 19 15| 32 30| 23 26| 25 26| 27 Sky cover SD(%)
WDR 33 33| 30 19| 23 17| 18 16| 19 17| 26 5| 31 33| 30 Wind dir (deg)
WSP 8 4| 5 4| 7 9| 10 9| 7 4| 4 3| 4 3| 5 Wind spd (kts)
WSD 1 2| 2 3| 3 2| 3 3| 3 3| 3 2| 3 2| 3 Wind spd SD(kts)
GST 13 5| 7 5| 11 17| 18 15| 10 5| 5 3| 6 4| 6 Wind gust(kts)
GSD 2 2| 3 3| 5 5| 7 7| 5 5| 4 2| 4 3| 4 Wind gust SD(kts)
P12 1 3| 2 0| 13 36| 84 93| 75 71| 49 35| 23 27| 28 11 0 12-hr PoP(%)
Q12 0 0| 0 0| 0 0| 37 45| 22 18| 13 9| 0 5| 8 12-hr QPF(.01in)
Q24 0| 0| 0| 82| 40| 22| 5| 26 24-hr QPF(.01in)
DUR 0 0| 0 0| 0 0| 5 6| 4 4| 3 3| 0 1| 3 Duration of precip(hrs)
T12 1 0| 0 0| 3 3| 11 17| 15 12| 11 6| 6 3| 4 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 1| 9 24| 97 72| 70 47| 55 21| 19 16| 16 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 107 96|101 102| 95 78| 79 68| 71 69| 75 76| 80 82| 85 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 45 4| 66 1| 48 4| 18 0| 44 6| 37 2| 35 3| 40 Solar rad (10s W/m2)
DAY 8, 9 AND 10:
KPDX NBM V5.0 NBX GUIDANCE 8/30/2026 1100 UTC
MON 07 |TUE 08 |WED 09 |THU 10
UTC 12 |00 12 |00 12 |00 Time (UTC)
PDT 05 |17 05 |17 05 |17 Time (PDT)
FHR 193|205 217|229 241|253 Forecast Hour
TXN 58| 76 59| 77 59| 78 Max/Min Temp(F)
XND 3| 6 3| 8 3| 8 SD of max/min temps(F)
TMP 58| 75 59| 77 60| 78 Temperature(F)
TSD 3| 6 3| 7 3| 7 SD of temp(F)
DPT 55| 56 55| 57 55| 57 Dew point temp(F)
DSD 2| 4 2| 5 3| 5 Dew point temp SD(F)
WBG 57| 68 57| 69 58| 70 Wet bulb temp(F)
SKY 55| 32 43| 27 50| 22 Sky cover(%)
SSD 26| 13 18| 17 19| 11 Sky cover SD(%)
WDR 0| 33 34| 32 36| 32 Wind dir (deg)
WSP 3| 5 4| 6 4| 5 Wind spd (kts)
WSD 3| 3 3| 3 3| 3 Wind spd SD(kts)
GST 4| 7 5| 9 5| 8 Wind gust(kts)
GSD 5| 5 5| 4 5| 4 Wind gust SD(kts)
P12 21| 17 15| 18 13| 12 12-hr PoP(%)
Q12 0| 0 0| 3 1| 0 12-hr QPF(.01in)
Q24 8| 0| 4| 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 9| 18 12| 14 10| 10 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 86| 92 95| 97 92| 95 Snow level 100s feet MSL
I12 0| 0 0| 0 0| 0 12-hr ice(1/100in)
SOL 30| 31 18| 32 18| 32 Solar rad (10s W/m2)
STANDARD DEVIATION AND THRESHOLD PROBABILITIES:
KPDX NBM V5.0 NBP GUIDANCE 8/30/2026 0700 UTC
MON 31| TUE 01| WED 02| THU 03| FRI 04| SAT 05| SUN 06| MON 07| TUE 08
UTC 00 12| 00 12| 00 12| 00 12| 00 12| 00 12| 00 12| 00 12| 00 12 Time (UTC)
PDT 17 05| 17 05| 17 05| 17 05| 17 05| 17 05| 17 05| 17 05| 17 05 Time (PDT)
FHR 17 29| 41 53| 65 77| 89 101|113 125|137 149|161 173|185 197|209 221 Forecast Hour
TXNMN 74 56| 84 60| 73 59| 67 56| 68 55| 71 55| 74 57| 74 58| 76 58 Mean min/max temp(F)
TXNSD 2 3| 3 1| 4 1| 5 3| 4 3| 6 4| 5 3| 6 3| 6 3 SD min/max temp(F)
TXNP1 72 53| 81 58| 68 57| 62 51| 63 50| 65 50| 67 51| 68 55| 68 55 10th percentile min/max temp(F)
TXNP2 73 55| 83 59| 70 58| 64 55| 65 52| 67 55| 70 56| 71 57| 72 57 25th percentile min/max temp(F)
TXNP5 73 57| 84 60| 72 59| 67 56| 68 56| 70 56| 74 58| 73 58| 75 58 50th percentile min/max temp(F)
TXNP7 74 59| 86 61| 75 60| 71 57| 70 57| 73 58| 78 59| 77 59| 80 59 75th percentile min/max temp(F)
TXNP9 76 59| 87 61| 79 61| 74 58| 73 58| 78 60| 81 60| 81 61| 83 61 90th percentile min/max temp(F)
WSPP1 6 0| 3 0| 4 5| 5 0| 2 0| 0 0| 0 0| 0 0| 0 0 10th percentile wnd(kts)
WSPP2 7 3| 4 0| 5 7| 7 4| 4 2| 2 0| 2 0| 3 0| 3 0 25th percentile wnd(kts)
WSPP5 8 4| 5 3| 7 8| 8 6| 6 4| 4 3| 4 3| 5 3| 5 3 50th percentile wnd(kts)
WSPP7 9 5| 6 5| 8 9| 10 9| 8 6| 6 4| 5 4| 7 5| 6 5 75th percentile wnd(kts)
WSPP9 9 5| 8 6| 10 11| 11 11| 10 7| 8 5| 7 6| 9 7| 9 7 90th percentile wnd(kts)
W24P1 9 | 7 | 8 | 10 | 6 | 6 | 6 | 6 | 6 10th percentile 24hr sustained wnd exceedance(kts)
W24P2 10 | 8 | 10 | 13 | 9 | 7 | 7 | 7 | 7 25th percentile 24hr sustained wnd exceedance(kts)
W24P5 11 | 9 | 11 | 14 | 11 | 9 | 8 | 9 | 8 50th percentile 24hr sustained wnd exceedance(kts)
W24P7 11 | 10 | 13 | 16 | 14 | 11 | 9 | 11 | 10 75th percentile 24hr sustained wnd exceedance(kts)
W24P9 12 | 12 | 14 | 18 | 16 | 13 | 11 | 13 | 13 90th percentile 24hr sustained wnd exceedance(kts)
G24P1 14 | 11 | 12 | 19 | 10 | 9 | 9 | 9 | 9 10th percentile 24hr wnd gust exceedance(kts)
G24P2 15 | 12 | 15 | 22 | 14 | 10 | 11 | 11 | 11 25th percentile 24hr wnd gust exceedance(kts)
G24P5 17 | 14 | 18 | 25 | 19 | 14 | 13 | 14 | 13 50th percentile 24hr wnd gust exceedance(kts)
G24P7 18 | 16 | 20 | 29 | 23 | 18 | 15 | 18 | 17 75th percentile 24hr wnd gust exceedance(kts)
G24P9 19 | 19 | 24 | 34 | 27 | 21 | 18 | 21 | 21 90th percentile 24hr wnd gust exceedance(kts)
Q24P1 0| 0| 0| 28| 0| 0| 0| 0| 0 10th percentile 24hr QPF(1/100in)
Q24P2 0| 0| 0| 79| 15| 0| 0| 0| 0 25th percentile 24hr QPF(1/100in)
Q24P5 0| 0| 0| 97| 56| 8| 0| 0| 0 50th percentile 24hr QPF(1/100in)
Q24P7 0| 0| 4| 117| 82| 41| 9| 11| 0 75th percentile 24hr QPF(1/100in)
Q24P9 0| 0| 16| 147| 99| 70| 47| 46| 25 90th percentile 24hr QPF(1/100in)
S24P1 0| 0| 0| 0| 0| 0| 0| 0| 0 10th percentile 24hr snow accum(1/10in)
S24P2 0| 0| 0| 0| 0| 0| 0| 0| 0 25th percentile 24hr snow accum(1/10in)
S24P5 0| 0| 0| 0| 0| 0| 0| 0| 0 50th percentile 24hr snow accum(1/10in)
S24P7 0| 0| 0| 0| 0| 0| 0| 0| 0 75th percentile 24hr snow accum(1/10in)
S24P9 0| 0| 0| 0| 0| 0| 0| 0| 0 90th percentile 24hr snow accum(1/10in)
I24P1 0| 0| 0| 0| 0| 0| 0| 0| 0 10th percentile 24hr ice accum(1/100in)
I24P2 0| 0| 0| 0| 0| 0| 0| 0| 0 25th percentile 24hr ice accum(1/100in)
I24P5 0| 0| 0| 0| 0| 0| 0| 0| 0 50th percentile 24hr ice accum(1/100in)
I24P7 0| 0| 0| 0| 0| 0| 0| 0| 0 75th percentile 24hr ice accum(1/100in)
I24P9 0| 0| 0| 0| 0| 0| 0| 0| 0 90th percentile 24hr ice accum(1/100in)
SLPP1 014 012|006 010|008 008|007 008|009 011|010 011|011 014|012 013|010 011 10th percentile MSLP(mb)
SLPP2 014 012|007 011|009 010|008 010|011 012|012 013|013 015|014 015|012 014 25th percentile MSLP(mb)
SLPP5 015 013|008 012|010 011|010 012|012 014|014 016|015 017|016 017|015 017 50th percentile MSLP(mb)
SLPP7 016 013|009 013|011 012|011 013|013 015|016 018|017 019|018 019|018 020 75th percentile MSLP(mb)
SLPP9 016 014|010 014|012 013|012 014|015 017|017 019|018 021|019 021|019 022 90th percentile MSLP(mb)