NBM Guidance for ILLINOIS VALLEY (K3S4)
42.1036N 123.6824W
Elevation 1394 ft
HOURLY TO 24 HOURS:
K3S4 NBM V5.0 NBH GUIDANCE 8/28/2026 1600 UTC
UTC 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 (UTC)
PDT 10 11 12 13 14 15 16 17 18 19 20 21 22 23 00 01 02 03 04 05 06 07 08 09 10 Time (PDT)
TMP 66 72 77 81 83 84 84 82 80 76 71 67 64 61 57 54 52 49 47 45 44 43 48 55 62 Temperature(F)
TSD 1 1 1 1 2 1 1 2 2 2 2 2 2 2 2 2 2 2 2 2 2 1 1 2 2 SD of temp(F)
DPT 51 51 50 48 46 46 46 47 46 46 47 48 48 48 48 48 47 46 45 45 44 43 47 47 46 Dew point temp(F)
DSD 3 2 3 3 3 3 4 4 4 4 3 3 2 2 2 2 2 2 2 2 2 2 2 2 2 Dew point temp SD(F)
WBG 61 66 70 72 73 73 71 70 68 65 62 60 57 56 54 51 49 47 46 45 43 44 48 53 57 Wet bulb temp(F)
SKY 7 3 0 2 5 8 22 31 28 13 22 22 16 14 11 15 8 24 20 19 18 17 15 10 10 Sky cover(%)
SSD 11 6 3 4 6 21 35 37 33 35 29 25 20 17 12 22 10 30 30 29 20 21 23 22 21 Sky cover SD(%)
WDR 2 2 2 5 24 25 25 24 25 25 24 24 32 35 35 35 35 36 0 1 0 0 2 2 2 Wind dir (deg)
WSP 2 3 3 3 3 4 5 6 5 4 3 2 2 1 1 1 1 1 1 1 1 1 2 3 4 Wind spd (kts)
WSD 1 1 1 1 2 2 2 2 1 1 1 1 1 2 2 2 2 1 1 1 1 1 1 1 1 Wind spd SD(kts)
GST 6 7 8 8 9 10 13 14 13 11 9 7 6 5 4 4 5 5 5 5 5 4 6 7 10 Wind gust(kts)
GSD 2 2 1 2 3 3 3 3 2 2 2 2 2 3 4 4 3 3 2 2 2 2 2 2 2 Wind gust SD(kts)
P01 0 0 0 0 0 0 0 0 0 1 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 1-hr PoP(%)
P06 0 1 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 12 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 83 83 84 85 88 89 88 87 86 85 85 85 85 85 84 84 83 82 80 79 78 83 84 83 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 27 8 4 3 3 4-88-88 Ceiling height*
MVC 23 20 16 13 12 14 14 14 17 18 22 26 28 26 27 23 29 32 35 37 39 36 32 29 23 Prob cig<=3000ft(%) MVFR
IFC 21 18 13 12 11 11 10 10 12 16 18 22 23 22 22 18 23 24 27 30 32 31 27 26 21 Prob cig<1000ft(%) IFR
LIC 14 9 7 5 4 3 2 3 4 6 10 13 13 13 14 13 15 16 19 22 24 23 19 15 9 Prob cig<500ft(%) LIFR
LCB 90250-88-88 44 60 60 50 49 42 41 46 40 39 38 40 33 23 8 4 3 3 4 14 20 Lowest cloud base*
VIS 60 70 80 90 90 90100100 80 80 70 80 90 90100 90 80 70 70 70 60 5 10 60 70 Visibility*
MVV 29 18 13 10 10 8 8 8 9 10 12 12 8 11 12 15 16 20 23 23 23 28 26 22 17 Prob vsby<=5mi(%) MVFR
IFV 14 7 5 4 3 2 3 2 2 4 6 5 4 6 6 8 10 12 12 13 14 19 17 14 11 Prob vsby<3mi(%) IFR
LIV 5 1 1 0 0 0 0 0 0 2 4 3 2 3 3 4 6 7 7 7 9 14 13 8 6 Prob vsby<1mi(%) LIFR
MHT 21 35 41 47 55 55 44 42 34 21 6 5 5 4 5 5 4 5 4 5 4 4 8 13 22 MixHgt 100s feet AGL
TWD 3 3 32 26 25 25 25 26 26 28 28 29 33 36 1 1 2 2 2 2 1 1 2 2 3 Transport wind dir
TWS 6 6 5 6 6 9 9 9 8 7 6 5 4 5 5 6 6 7 7 6 6 6 7 8 8 Transport wind spd(kts)
SOL 46 64 83 87 86 76 69 49 29 13 4 3 2 2 0 0 0 0 0 0 0 0 16 33 49 Solar rad (10s W/m2)
3-HOURLY TO 60 HOURS:
K3S4 NBM V5.0 NBS GUIDANCE 8/28/2026 1600 UTC
DT /AUG 29 /AUG 30 /AUG 31
UTC 21 00 03 06 09 12 15 18 21 00 03 06 09 12 15 18 21 00 03 06 09 12 15 Time (UTC)
PDT 14 17 20 23 02 05 08 11 14 17 20 23 02 05 08 11 14 17 20 23 02 05 08 Time (PDT)
FHR 05 08 11 14 17 20 23 26 29 32 35 38 41 44 47 50 53 56 59 62 65 68 71 Forecast Hour
TXN 43 84 42 89 48 Max/Min Temp(F)
XND 3 2 3 3 4 SD of max/min temps(F)
TMP 83 82 71 61 52 45 48 68 79 81 70 60 50 44 48 70 83 86 74 64 54 49 52 Temperature(F)
TSD 2 2 2 2 2 2 1 3 2 2 2 2 2 1 1 2 2 2 2 2 2 2 2 SD of temp(F)
DPT 46 47 47 48 47 45 47 46 40 37 38 41 42 42 45 45 38 33 34 37 38 37 40 Dew point temp(F)
DSD 3 4 3 2 2 2 2 2 2 3 3 3 3 3 2 2 3 3 4 4 3 3 3 Dew point temp SD(F)
WBG 73 70 62 56 49 45 48 63 70 67 59 53 47 43 47 63 71 69 60 54 48 45 48 Wet bulb temp(F)
SKY 5 31 22 14 8 19 15 2 0 0 2 3 9 9 12 1 1 1 2 1 2 6 5 Sky cover(%)
SSD 6 37 29 17 10 29 23 8 1 0 2 15 13 9 11 8 2 2 3 2 3 6 4 Sky cover SD(%)
WDR 24 24 24 35 35 1 2 2 2 3 1 2 1 1 3 3 1 0 3 5 6 7 7 Wind dir (deg)
WSP 3 6 3 1 1 1 2 5 5 6 7 7 5 3 3 6 4 4 4 4 1 0 0 Wind spd (kts)
WSD 2 2 1 2 2 1 1 1 2 2 2 2 1 1 1 2 1 1 2 2 2 1 1 Wind spd SD(kts)
GST 9 14 9 5 5 5 6 12 11 14 16 15 10 7 8 12 10 11 10 9 5 2 2 Wind gust(kts)
GSD 3 3 2 3 3 2 2 2 3 2 3 3 2 2 2 3 3 2 4 2 2 2 2 Wind gust SD(kts)
P06 0 1 0 0 0 0 1 2 0 0 0 6-hr PoP(%)
P12 1 0 3 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 15 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 88 87 85 85 83 79 84 81 79 82 77 72 72 71 74 78 83 88 95100100100100 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 4 4-88-88-88-88-88-88-88-88-88-88-88-88-88-88-88-88 Ceiling height*
IFC 11 10 18 22 23 30 27 16 13 9 13 13 15 21 24 16 11 9 14 16 28 29 30 Prob cig<1000ft(%) IFR
LCB 44 50 41 39 33 4 4260200170240130180 70120180170160200230210180160 Lowest cloud base*
VIS 90100 70 90 80 70 10 80 90100 80100100100 90100100100 90 90100 90 30 Visibility*
IFV 3 2 6 6 10 13 17 6 2 1 1 5 7 10 18 5 3 2 6 9 8 16 22 Prob vsby<3mi(%) IFR
MHT 55 42 6 4 4 5 8 31 52 57 14 5 4 5 8 22 37 48 11 5 4 5 3 MixHgt 100s feet AGL
TWD 25 26 28 36 2 2 2 2 0 1 1 2 2 2 4 3 3 2 4 5 6 6 5 Transport wind dir
TWS 6 9 6 5 6 6 7 8 6 9 11 9 9 8 8 9 6 7 9 6 5 5 4 Transport wind spd(kts)
SOL 86 49 4 2 0 0 16 62 87 57 6 3 0 0 8 51 87 65 22 11 0 0 4 Solar rad (10s W/m2)
DAILY TO 7 DAYS:
K3S4 NBM V5.0 NBE GUIDANCE 8/28/2026 1600 UTC
SAT 29 |SUN 30 |MON 31 |TUE 01 |WED 02 |THU 03 |FRI 04 |SAT 05 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 20| 32 44| 56 68| 80 92|104 116|128 140|152 164|176 188 Forecast Hour
TXN 43| 84 42| 89 48| 89 46| 79 43| 72 43| 74 41| 78 42 47 88 Max/Min Temp(F)
XND 3| 2 3| 3 4| 3 3| 5 2| 6 3| 7 4| 7 4 SD of max/min temps(F)
TMP 45| 81 44| 86 49| 81 47| 72 46| 67 47| 70 44| 75 45 Temperature(F)
TSD 2| 2 1| 2 2| 4 2| 5 2| 6 3| 7 3| 7 4 SD of temp(F)
DPT 45| 37 42| 33 37| 43 45| 48 45| 47 47| 46 42| 41 41 Dew point temp(F)
DSD 2| 3 3| 3 3| 4 3| 4 3| 6 4| 7 4| 7 4 Dew point temp SD(F)
WBG 45| 67 43| 69 45| 68 45| 65 45| 60 47| 62 44| 64 44 Wet bulb temp(F)
SKY 19| 0 9| 1 6| 16 37| 30 54| 72 73| 38 35| 11 21 Sky cover(%)
SSD 29| 0 9| 2 6| 27 10| 19 25| 20 19| 24 15| 8 30 Sky cover SD(%)
WDR 1| 3 1| 0 7| 26 14| 24 20| 24 20| 25 8| 30 7 Wind dir (deg)
WSP 1| 6 3| 4 0| 7 0| 8 0| 9 1| 6 0| 7 1 Wind spd (kts)
WSD 1| 2 1| 1 1| 1 0| 2 2| 3 3| 3 2| 3 2 Wind spd SD(kts)
GST 5| 14 7| 11 2| 15 1| 17 5| 21 6| 15 3| 16 4 Wind gust(kts)
GSD 2| 2 2| 2 2| 2 2| 3 6| 7 8| 5 4| 5 4 Wind gust SD(kts)
P12 1| 0 3| 0 0| 0 1| 25 24| 34 66| 55 32| 20 11 -99-99 12-hr PoP(%)
Q12 0| 0 0| 0 0| 0 0| 1 0| 6 28| 19 1| 0 0 12-hr QPF(.01in)
Q24 | 0| 0| 0| 1| 34| 20| 0 12 24-hr QPF(.01in)
DUR 0| 0 0| 0 0| 0 0| 1 0| 2 4| 4 1| 0 0 Duration of precip(hrs)
T12 0| 0 0| 0 0| 1 1| 13 7| 5 7| 12 9| 9 5 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 15| 0 0| 0 3| 22 18| 53 56| 41 13| 11 8 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 79| 82 71| 88 103|101 94| 87 81| 91 82| 79 74| 83 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 4| 52 2| 53 8| 46 6| 46 8| 31 0| 3 0| 45 7 Solar rad (10s W/m2)
DAY 8, 9 AND 10:
K3S4 NBM V5.0 NBX GUIDANCE 8/28/2026 1600 UTC
SUN 06| MON 07| TUE 08
UTC 00 12 |00 12 |00 12 Time (UTC)
PDT 17 05 |17 05 |17 05 Time (PDT)
FHR 200 212|224 236|248 260 Forecast Hour
TXN 83 45| 87 49| 90 50 Max/Min Temp(F)
XND 9 5| 8 6| 7 7 SD of max/min temps(F)
TMP 80 48| 84 50| 85 52 Temperature(F)
TSD 9 5| 8 6| 7 6 SD of temp(F)
DPT 40 41| 41 42| 42 43 Dew point temp(F)
DSD 7 5| 7 4| 6 4 Dew point temp SD(F)
WBG 67 45| 69 47| 71 48 Wet bulb temp(F)
SKY 10 23| 13 18| 8 25 Sky cover(%)
SSD 16 30| 26 6| 6 12 Sky cover SD(%)
WDR 33 9| 30 9| 29 7 Wind dir (deg)
WSP 5 0| 4 0| 5 0 Wind spd (kts)
WSD 3 1| 2 1| 2 1 Wind spd SD(kts)
GST 12 3| 12 2| 12 2 Wind gust(kts)
GSD 4 3| 3 3| 3 3 Wind gust SD(kts)
P12 13 5| 3 2| 3 2 12-hr PoP(%)
Q12 1 0| 0 0| 0 0 12-hr QPF(.01in)
Q24 1| 0| 0 24-hr QPF(.01in)
DUR 1 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 8 0| 3 0| 4 2 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 90 87| 93 92|100 98 Snow level 100s feet MSL
I12 0 0| 0 0| 0 0 12-hr ice(1/100in)
SOL 20 16| 31 17| 33 20 Solar rad (10s W/m2)
STANDARD DEVIATION AND THRESHOLD PROBABILITIES:
K3S4 NBM V5.0 NBP GUIDANCE 8/28/2026 1300 UTC
SAT 29| SUN 30| MON 31| TUE 01| WED 02| THU 03| FRI 04| SAT 05| SUN 06|
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 23| 35 47| 59 71| 83 95|107 119|131 143|155 167|179 191|203 215|227 Forecast Hour
TXNMN 45| 84 43| 89 48| 89 46| 79 43| 72 43| 74 41| 78 42| 83 45| 83 Mean min/max temp(F)
TXNSD 3| 2 3| 3 4| 3 3| 5 2| 6 3| 7 4| 7 4| 9 5| 9 SD min/max temp(F)
TXNP1 41| 82 40| 86 44| 85 42| 72 41| 66 40| 64 36| 70 37| 72 39| 72 10th percentile min/max temp(F)
TXNP2 42| 83 41| 88 45| 87 44| 76 42| 68 42| 69 39| 73 39| 77 41| 77 25th percentile min/max temp(F)
TXNP5 44| 84 43| 90 49| 89 46| 80 43| 71 43| 74 41| 77 42| 84 45| 84 50th percentile min/max temp(F)
TXNP7 49| 85 45| 91 52| 90 47| 83 45| 76 44| 78 42| 83 44| 91 50| 91 75th percentile min/max temp(F)
TXNP9 50| 86 47| 91 53| 92 49| 85 46| 79 45| 83 45| 88 48| 95 53| 95 90th percentile min/max temp(F)
WSPP1 0| 4 1| 3 0| 5 0| 5 0| 3 0| 3 0| 2 0| 2 0| 3 10th percentile wnd(kts)
WSPP2 0| 5 2| 4 0| 6 0| 6 0| 5 0| 4 0| 4 0| 3 0| 4 25th percentile wnd(kts)
WSPP5 1| 6 3| 4 0| 6 0| 7 1| 8 1| 5 1| 7 1| 5 0| 4 50th percentile wnd(kts)
WSPP7 2| 7 3| 5 2| 7 0| 8 2| 10 4| 7 2| 8 3| 7 2| 5 75th percentile wnd(kts)
WSPP9 2| 8 4| 6 3| 8 1| 10 5| 13 7| 9 3| 10 4| 9 3| 8 90th percentile wnd(kts)
W24P1 | 7 | 7 | 7 | 8 | 8 | 7 | 7 | 6 | 6 10th percentile 24hr sustained wnd exceedance(kts)
W24P2 | 7 | 8 | 7 | 8 | 9 | 9 | 7 | 7 | 7 25th percentile 24hr sustained wnd exceedance(kts)
W24P5 | 8 | 9 | 8 | 9 | 10 | 11 | 9 | 9 | 8 50th percentile 24hr sustained wnd exceedance(kts)
W24P7 | 9 | 10 | 9 | 10 | 11 | 13 | 11 | 11 | 10 75th percentile 24hr sustained wnd exceedance(kts)
W24P9 | 10 | 10 | 9 | 10 | 12 | 14 | 12 | 12 | 11 90th percentile 24hr sustained wnd exceedance(kts)
G24P1 | 15 | 17 | 15 | 17 | 17 | 16 | 16 | 15 | 14 10th percentile 24hr wnd gust exceedance(kts)
G24P2 | 16 | 18 | 16 | 18 | 19 | 19 | 17 | 16 | 15 25th percentile 24hr wnd gust exceedance(kts)
G24P5 | 17 | 19 | 17 | 19 | 20 | 23 | 19 | 19 | 17 50th percentile 24hr wnd gust exceedance(kts)
G24P7 | 19 | 21 | 19 | 20 | 22 | 27 | 23 | 22 | 19 75th percentile 24hr wnd gust exceedance(kts)
G24P9 | 20 | 22 | 21 | 22 | 24 | 31 | 28 | 24 | 23 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| 26| 4| 0| 0| 50th percentile 24hr QPF(1/100in)
Q24P7 | 0| 0| 0| 4| 70| 37| 0| 0| 75th percentile 24hr QPF(1/100in)
Q24P9 | 0| 0| 0| 19| 108| 94| 19| 2| 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 018|013 017|010 012|008 013|010 014|010 013|011 013|010 013|008 011|008 10th percentile MSLP(mb)
SLPP2 018|013 017|010 013|009 014|012 016|012 014|013 016|012 015|011 014|010 25th percentile MSLP(mb)
SLPP5 019|014 018|011 013|010 015|013 017|014 017|014 017|014 017|014 016|012 50th percentile MSLP(mb)
SLPP7 019|014 019|012 014|010 016|014 018|016 019|016 019|016 019|015 018|014 75th percentile MSLP(mb)
SLPP9 020|015 020|013 015|011 016|015 019|017 020|017 021|018 020|016 020|016 90th percentile MSLP(mb)