NBM Guidance for GERBER RESERVOIR (GRBO3)
42.2060N 121.1380W
Elevation 4941 ft
HOURLY TO 24 HOURS:
GRBO3 NBM V5.0 NBH GUIDANCE 8/29/2026 1700 UTC
UTC 18 19 20 21 22 23 00 01 02 03 04 05 06 07 08 09 10 11 12 13 14 15 16 17 18 Time (UTC)
PDT 11 12 13 14 15 16 17 18 19 20 21 22 23 00 01 02 03 04 05 06 07 08 09 10 11 Time (PDT)
TMP 64 67 69 71 72 72 71 70 67 62 58 55 52 50 47 44 42 40 38 36 36 45 54 60 65 Temperature(F)
TSD 1 1 1 2 2 2 2 1 2 2 2 1 1 1 1 1 1 1 1 1 1 1 1 1 1 SD of temp(F)
DPT 40 38 35 32 30 29 28 27 24 25 26 27 29 29 30 30 30 29 29 27 28 32 32 31 29 Dew point temp(F)
DSD 2 2 2 3 2 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 2 2 2 3 Dew point temp SD(F)
WBG 58 60 62 62 61 59 59 57 55 51 48 46 45 43 42 40 38 36 36 33 34 41 49 52 56 Wet bulb temp(F)
SKY 0 0 0 0 0 0 0 0 4 1 3 7 6 3 4 5 5 4 2 3 8 0 0 0 2 Sky cover(%)
SSD 0 0 0 0 0 1 0 0 3 1 3 6 6 3 5 6 5 5 2 3 5 0 0 1 22 Sky cover SD(%)
WDR 25 25 26 26 26 27 28 29 30 32 33 35 35 36 1 1 1 2 1 2 2 4 5 11 16 Wind dir (deg)
WSP 5 6 7 8 8 8 9 8 6 5 4 4 4 3 2 2 2 2 2 2 2 2 1 1 2 Wind spd (kts)
WSD 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 0 0 0 0 0 0 0 1 1 Wind spd SD(kts)
GST 11 14 16 17 17 18 18 17 16 13 12 11 9 7 6 5 5 4 4 4 4 5 4 4 5 Wind gust(kts)
GSD 2 2 2 1 2 2 2 2 3 3 3 3 3 2 2 1 1 1 1 1 1 1 1 1 1 Wind gust SD(kts)
P01 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 PoP(%)
P06 0 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 91 93 95 96 96 96 96 95 92 90 88 86 86 84 81 79 76 74 73 73 73 74 76 78 81 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 0 0 0 0 0 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 0 0 0 0 0 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 0 0 0 0 0 0 0 0 0 0 0 0 Prob cig<500ft(%) LIFR
LCB -88 44 44-88230220220190190170170-88-88230230230230210220220220200180170170 Lowest cloud base*
VIS 100100100100100100100100100100100100100100100100100100100100100100100100100 Visibility*
MVV 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 1 1 1 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 43 52 62 68 74 75 72 56 35 5 5 5 5 5 5 5 5 5 4 4 4 4 14 23 33 MixHgt 100s feet AGL
TWD 25 25 26 26 27 27 28 28 31 33 34 35 36 1 2 4 5 5 6 5 6 8 9 14 17 Transport wind dir
TWS 9 11 13 14 15 15 14 13 12 10 11 11 10 9 8 7 7 6 6 6 6 4 4 3 3 Transport wind spd(kts)
SOL 69 86 90 88 81 70 54 30 12 3 2 2 2 0 0 0 0 0 0 0 4 20 37 53 66 Solar rad (10s W/m2)
3-HOURLY TO 60 HOURS:
GRBO3 NBM V5.0 NBS GUIDANCE 8/29/2026 1700 UTC
DT /AUG 30 /AUG 31 /SEP 1
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 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 36 79 42 83 44 Max/Min Temp(F)
XND 4 2 3 2 4 SD of max/min temps(F)
TMP 71 71 62 52 44 38 45 65 73 75 65 57 50 45 52 71 77 77 68 59 51 45 50 Temperature(F)
TSD 2 2 2 1 1 1 1 1 2 1 2 2 2 2 2 1 1 1 2 2 2 2 2 SD of temp(F)
DPT 32 28 25 29 30 29 32 29 23 21 22 22 25 23 27 29 25 24 23 28 31 31 34 Dew point temp(F)
DSD 3 3 3 3 3 3 2 3 4 5 4 5 5 5 4 3 3 3 3 4 4 4 5 Dew point temp SD(F)
WBG 62 59 51 45 40 36 41 56 61 60 52 47 42 38 45 60 64 62 55 49 45 41 45 Wet bulb temp(F)
SKY 0 0 1 6 5 2 0 2 3 8 12 5 6 3 0 2 4 12 28 43 43 38 20 Sky cover(%)
SSD 0 0 1 6 6 2 0 22 33 31 30 3 5 3 0 5 11 17 28 26 17 22 25 Sky cover SD(%)
WDR 26 28 32 35 1 1 4 16 23 25 35 5 8 11 12 19 21 22 21 17 15 14 15 Wind dir (deg)
WSP 8 9 5 4 2 2 2 2 3 3 1 1 2 2 4 6 9 10 5 3 2 3 4 Wind spd (kts)
WSD 1 1 1 1 1 0 0 1 1 1 1 1 1 1 1 1 2 2 1 1 1 1 1 Wind spd SD(kts)
GST 17 18 13 9 5 4 5 5 10 10 3 4 4 5 9 14 19 21 14 7 7 7 9 Wind gust(kts)
GSD 1 2 3 3 1 1 1 1 1 2 2 2 2 2 2 2 3 3 3 3 3 2 2 Wind gust SD(kts)
P06 0 0 0 0 0 0 0 0 0 0 0 6-hr PoP(%)
P12 0 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 1 0 0 0 0 3-hr Tstm prob(%)
T06 0 0 0 0 0 0 0 0 1 1 0 6-hr Tstm prob(%)
T12 0 0 0 1 1 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 1 1 Cond prob of rain(%)
S06 0 0 0 0 0 0 0 0 0 0 0 6-hr snow(1/10in)
SLV 96 96 90 86 79 73 74 81 91 96 99100100100 97 99100110110100 94 89 87 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 0 0 0 0 0 0 0 0 0 1 2 0 0 0 0 0 0 1 0 Prob cig<1000ft(%) IFR
LCB -88220170-88230220200170120110110190130150130110190150150190130170100 Lowest cloud base*
VIS 100100100100100100100100100100100100100100100100100100100100100100100 Visibility*
IFV 0 0 0 0 0 0 0 0 0 0 0-99-99-99-99-99-99-99-99-99-99-99-99 Prob vsby<3mi(%) IFR
MHT 68 72 5 5 5 4 4 33 61 69 3 5 5 5 5 56 95 88 6 5 5 4 7 MixHgt 100s feet AGL
TWD 26 28 33 36 4 6 8 17 23 25 34 7 10 13 14 19 20 21 20 19 18 16 17 Transport wind dir
TWS 14 14 10 10 7 6 4 3 4 6 4 7 7 7 6 15 18 18 11 10 8 8 7 Transport wind spd(kts)
SOL 88 54 3 2 0 0 20 66 88 54 4 2 0 0 15 53 87 63 19 9 0 0 5 Solar rad (10s W/m2)
DAILY TO 7 DAYS:
GRBO3 NBM V5.0 NBE GUIDANCE 8/29/2026 1700 UTC
SUN 30 |MON 31 |TUE 01 |WED 02 |THU 03 |FRI 04 |SAT 05 |SUN 06 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 19| 31 43| 55 67| 79 91|103 115|127 139|151 163|175 187 Forecast Hour
TXN 36| 79 42| 83 44| 74 40| 65 40| 64 35| 66 36| 70 37 42 79 Max/Min Temp(F)
XND 4| 2 3| 2 4| 4 3| 6 4| 6 6| 7 6| 8 7 SD of max/min temps(F)
TMP 38| 75 45| 77 45| 67 43| 59 43| 59 40| 62 40| 65 41 Temperature(F)
TSD 1| 1 2| 1 2| 5 2| 6 3| 7 5| 7 6| 9 6 SD of temp(F)
DPT 29| 21 23| 24 31| 29 36| 36 38| 38 35| 34 32| 32 32 Dew point temp(F)
DSD 3| 5 5| 3 4| 8 5| 7 5| 6 5| 8 7| 9 7 Dew point temp SD(F)
WBG 36| 60 38| 62 41| 56 40| 51 41| 53 39| 53 37| 55 37 Wet bulb temp(F)
SKY 2| 8 3| 12 38| 23 52| 74 59| 43 51| 39 29| 12 20 Sky cover(%)
SSD 2| 31 3| 17 22| 17 30| 23 26| 22 29| 25 22| 12 13 Sky cover SD(%)
WDR 1| 25 11| 22 14| 22 17| 23 18| 25 7| 23 12| 23 5 Wind dir (deg)
WSP 2| 3 2| 10 3| 11 5| 10 6| 8 2| 6 2| 6 2 Wind spd (kts)
WSD 0| 1 1| 2 1| 3 2| 3 2| 3 2| 3 2| 3 1 Wind spd SD(kts)
GST 4| 10 5| 21 7| 22 11| 23 14| 20 6| 18 5| 17 4 Wind gust(kts)
GSD 1| 2 2| 3 2| 3 4| 4 5| 4 4| 5 3| 5 3 Wind gust SD(kts)
P12 0| 0 0| 0 0| 1 24| 22 49| 45 38| 27 27| 16 15 -99-99 12-hr PoP(%)
Q12 0| 0 0| 0 0| 0 1| 0 4| 9 5| 5 4| 7 0 12-hr QPF(.01in)
Q24 | 0| 0| 1| 4| 14| 9| 7 7 24-hr QPF(.01in)
DUR 0| 0 0| 0 0| 0 1| 0 1| 3 1| 1 1| 3 0 Duration of precip(hrs)
T12 0| 0 0| 1 1| 4 8| 4 5| 14 8| 5 4| 6 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| 0 1| 9 12| 24 44| 35 30| 23 13| 12 11 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 73| 96 102|105 89| 94 84| 93 89| 91 80| 89 81| 92 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 4| 54 1| 55 7| 47 6| 47 4| 15 6| 47 6| 48 6 Solar rad (10s W/m2)
DAY 8, 9 AND 10:
GRBO3 NBM V5.0 NBX GUIDANCE 8/29/2026 1700 UTC
MON 07| TUE 08| WED 09
UTC 00 12 |00 12 |00 12 Time (UTC)
PDT 17 05 |17 05 |17 05 Time (PDT)
FHR 199 211|223 235|247 259 Forecast Hour
TXN 72 38| 77 42| 79 43 Max/Min Temp(F)
XND 8 6| 7 5| 7 6 SD of max/min temps(F)
TMP 68 42| 73 44| 74 46 Temperature(F)
TSD 9 6| 7 5| 7 6 SD of temp(F)
DPT 32 30| 31 31| 32 33 Dew point temp(F)
DSD 8 7| 7 7| 9 7 Dew point temp SD(F)
WBG 57 38| 61 40| 61 42 Wet bulb temp(F)
SKY 18 27| 15 27| 16 18 Sky cover(%)
SSD 28 37| 20 22| 13 9 Sky cover SD(%)
WDR 25 8| 23 6| 27 14 Wind dir (deg)
WSP 4 2| 4 2| 5 2 Wind spd (kts)
WSD 3 1| 3 1| 3 1 Wind spd SD(kts)
GST 13 4| 13 4| 15 4 Wind gust(kts)
GSD 5 2| 4 2| 5 2 Wind gust SD(kts)
P12 8 5| 3 3| 5 5 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 4 0| 2 4| 3 4 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 96 91|103 99|109 105 Snow level 100s feet MSL
I12 0 0| 0 0| 0 0 12-hr ice(1/100in)
SOL 17 13| 29 18| 31 16 Solar rad (10s W/m2)
STANDARD DEVIATION AND THRESHOLD PROBABILITIES:
GRBO3 NBM V5.0 NBP GUIDANCE 8/29/2026 1300 UTC
SUN 30| MON 31| TUE 01| WED 02| THU 03| FRI 04| SAT 05| SUN 06| MON 07|
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 38| 79 42| 83 44| 74 40| 65 40| 64 35| 66 36| 70 37| 72 38| 72 Mean min/max temp(F)
TXNSD 4| 2 3| 2 4| 4 3| 6 4| 6 6| 7 6| 8 7| 8 6| 8 SD min/max temp(F)
TXNP1 33| 77 39| 80 40| 68 36| 58 35| 57 28| 58 30| 60 27| 63 31| 63 10th percentile min/max temp(F)
TXNP2 35| 78 40| 82 41| 70 37| 62 38| 60 30| 62 32| 64 32| 66 33| 66 25th percentile min/max temp(F)
TXNP5 37| 79 41| 83 44| 74 40| 65 40| 65 35| 66 35| 69 37| 71 39| 71 50th percentile min/max temp(F)
TXNP7 42| 80 46| 84 48| 78 41| 70 43| 68 39| 71 39| 78 41| 80 41| 80 75th percentile min/max temp(F)
TXNP9 43| 81 48| 85 49| 80 45| 72 45| 71 41| 73 43| 81 44| 83 46| 83 90th percentile min/max temp(F)
WSPP1 1| 2 1| 7 1| 7 2| 5 1| 4 1| 3 1| 2 1| 2 1| 2 10th percentile wnd(kts)
WSPP2 1| 3 2| 9 2| 8 3| 7 2| 6 1| 4 1| 4 1| 3 1| 3 25th percentile wnd(kts)
WSPP5 2| 3 2| 10 3| 10 4| 9 5| 7 2| 6 2| 6 2| 4 2| 4 50th percentile wnd(kts)
WSPP7 2| 4 2| 11 3| 11 5| 11 6| 9 4| 9 3| 9 3| 6 2| 6 75th percentile wnd(kts)
WSPP9 2| 4 3| 11 4| 13 6| 13 7| 11 5| 11 4| 10 3| 8 3| 9 90th percentile wnd(kts)
W24P1 | 9 | 4 | 10 | 9 | 9 | 9 | 6 | 6 | 5 10th percentile 24hr sustained wnd exceedance(kts)
W24P2 | 10 | 4 | 11 | 10 | 11 | 10 | 7 | 7 | 6 25th percentile 24hr sustained wnd exceedance(kts)
W24P5 | 10 | 5 | 12 | 13 | 12 | 11 | 10 | 9 | 7 50th percentile 24hr sustained wnd exceedance(kts)
W24P7 | 11 | 5 | 13 | 14 | 15 | 14 | 12 | 12 | 9 75th percentile 24hr sustained wnd exceedance(kts)
W24P9 | 12 | 6 | 14 | 16 | 16 | 15 | 14 | 14 | 12 90th percentile 24hr sustained wnd exceedance(kts)
G24P1 | 19 | 11 | 21 | 20 | 21 | 19 | 14 | 14 | 12 10th percentile 24hr wnd gust exceedance(kts)
G24P2 | 20 | 11 | 22 | 22 | 23 | 21 | 17 | 17 | 13 25th percentile 24hr wnd gust exceedance(kts)
G24P5 | 21 | 12 | 24 | 25 | 25 | 24 | 21 | 20 | 17 50th percentile 24hr wnd gust exceedance(kts)
G24P7 | 22 | 13 | 26 | 28 | 29 | 28 | 25 | 24 | 20 75th percentile 24hr wnd gust exceedance(kts)
G24P9 | 24 | 14 | 27 | 31 | 31 | 30 | 29 | 27 | 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| 15| 30| 16| 0| 0| 75th percentile 24hr QPF(1/100in)
Q24P9 | 0| 0| 2| 54| 60| 49| 33| 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 017|009 012|005 011|007 014|009 012|009 012|008 012|008 013|009 012|007 10th percentile MSLP(mb)
SLPP2 018|010 012|005 012|008 015|010 013|010 014|010 015|010 016|011 015|009 25th percentile MSLP(mb)
SLPP5 018|010 013|006 013|009 016|011 015|011 016|012 017|012 017|013 017|012 50th percentile MSLP(mb)
SLPP7 019|011 014|007 014|010 017|013 016|013 018|014 019|014 019|014 019|014 75th percentile MSLP(mb)
SLPP9 019|011 015|008 015|011 018|013 018|014 019|016 021|016 021|016 021|015 90th percentile MSLP(mb)