NBM Guidance for DETROIT DAM (DTTO3)
44.7244N 122.2536W
Elevation 1332 ft
HOURLY TO 24 HOURS:
DTTO3 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 64 66 68 69 70 70 70 70 70 67 64 61 58 57 55 54 53 52 51 51 49 49 51 54 56 Temperature(F)
TSD 1 1 1 1 1 1 1 2 2 2 2 2 2 2 2 2 2 2 2 2 3 2 2 2 2 SD of temp(F)
DPT 52 54 57 57 56 56 55 54 54 53 52 51 50 50 48 48 47 46 46 45 45 44 44 46 49 Dew point temp(F)
DSD 2 2 1 1 1 1 1 1 1 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 Dew point temp SD(F)
WBG 60 64 68 67 68 68 65 64 64 62 59 56 55 53 52 51 50 50 49 49 47 47 48 52 54 Wet bulb temp(F)
SKY 6 4 3 7 7 4 3 4 7 11 15 23 37 40 48 66 78 74 59 65 66 69 54 40 53 Sky cover(%)
SSD 14 8 6 6 9 5 4 6 11 14 22 29 36 32 33 26 21 21 30 29 28 29 28 29 29 Sky cover SD(%)
WDR 32 31 30 30 30 30 30 29 30 29 29 30 30 31 30 30 29 29 29 29 27 25 18 24 29 Wind dir (deg)
WSP 3 4 6 7 7 8 7 7 7 6 6 6 4 4 3 3 2 2 2 2 2 2 3 3 4 Wind spd (kts)
WSD 1 1 1 1 1 1 1 1 1 1 2 2 1 1 1 1 1 1 1 1 1 1 1 1 1 Wind spd SD(kts)
GST 5 8 9 11 12 12 13 13 13 13 12 12 10 8 8 7 6 6 5 5 5 5 6 7 9 Wind gust(kts)
GSD 1 1 1 1 1 1 1 1 1 2 3 3 3 3 2 2 2 2 2 2 2 2 2 2 2 Wind gust SD(kts)
P01 0 0 0 0 0 0 0 0 0 0 0 1 2 0 0 0 2 2 4 3 3 1 0 0 0 1-hr PoP(%)
P06 0 5 13 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 12 12 12 12 12 0 0 14 14 15 0 4 4 11 11 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 78 78 79 80 81 82 82 82 81 82 82 82 82 82 82 80 79 75 72 70 71 71 69 69 69 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 35 22 22 22 22 27 35 35 35 35 Ceiling height*
MVC 8 6 5 3 0 0 0 0 1 1 2 3 5 7 10 32 35 36 37 38 34 30 27 27 28 Prob cig<=3000ft(%) MVFR
IFC 1 0 1 0 0 0 0 0 1 1 2 2 2 3 3 14 15 15 14 13 12 11 10 7 4 Prob cig<1000ft(%) IFR
LIC 0 0 0 0 0 0 0 0 0 0 0 1 1 2 2 4 4 5 4 4 5 5 4 3 1 Prob cig<500ft(%) LIFR
LCB 110110190140 90 28 80 40 42 44 38 31 25 29 28 17 16 16 14 15 17 26 24 24 35 Lowest cloud base*
VIS 100100100100100100100100100100100100100100100100100100100100100100100100100 Visibility*
MVV 6 3 2 1 2 1 1 1 1 1 1 1 1 0 0 5 6 8 10 11 11 12 11 7 5 Prob vsby<=5mi(%) MVFR
IFV 4 2 1 1 1 0 0 0 0 0 1 0 0 0 0 3 3 5 7 8 8 8 8 5 3 Prob vsby<3mi(%) IFR
LIV 3 1 0 0 0 0 0 0 0 0 0 0 0 0 0 2 2 3 4 5 5 6 5 3 2 Prob vsby<1mi(%) LIFR
MHT 25 27 34 36 38 39 40 37 35 28 10 7 6 4 5 8 8 10 9 4 5 5 11 21 25 MixHgt 100s feet AGL
TWD 29 29 28 28 28 28 28 28 28 28 28 29 29 29 28 28 27 27 27 27 26 25 26 27 28 Transport wind dir
TWS 4 5 6 7 8 9 9 9 9 10 8 8 7 6 5 5 6 6 5 5 4 4 4 6 6 Transport wind spd(kts)
SOL 50 64 80 85 83 77 66 52 28 12 3 2 2 2 0 0 0 0 0 0 0 2 15 20 26 Solar rad (10s W/m2)
3-HOURLY TO 60 HOURS:
DTTO3 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 49 63 44 70 50 Max/Min Temp(F)
XND 2 2 3 3 2 SD of max/min temps(F)
TMP 70 70 64 57 53 51 51 57 61 63 58 53 50 46 48 62 68 70 62 56 53 52 56 Temperature(F)
TSD 1 2 2 2 2 2 2 3 2 2 2 1 1 1 1 3 3 3 2 2 2 2 2 SD of temp(F)
DPT 56 54 52 50 47 45 44 50 53 51 48 45 43 40 42 45 49 50 48 44 41 37 39 Dew point temp(F)
DSD 1 1 2 2 2 2 2 2 2 2 3 2 2 3 2 3 4 4 3 3 4 4 4 Dew point temp SD(F)
WBG 68 64 59 53 50 49 48 57 62 59 54 50 47 44 46 59 64 63 56 52 48 47 51 Wet bulb temp(F)
SKY 7 4 15 40 78 65 54 41 20 7 14 33 29 32 14 13 13 9 21 19 16 14 13 Sky cover(%)
SSD 9 6 22 32 21 29 28 30 22 19 17 33 18 38 9 13 14 8 17 9 9 8 7 Sky cover SD(%)
WDR 30 29 29 31 29 29 18 29 29 29 30 30 8 10 10 30 30 31 34 6 8 9 8 Wind dir (deg)
WSP 7 7 6 4 2 2 3 5 7 8 5 2 2 2 2 3 5 6 3 4 3 3 3 Wind spd (kts)
WSD 1 1 2 1 1 1 1 1 1 1 2 1 1 1 1 1 1 1 1 1 1 1 1 Wind spd SD(kts)
GST 12 13 12 8 6 5 6 10 13 14 11 6 4 4 5 6 9 11 6 9 8 6 6 Wind gust(kts)
GSD 1 1 3 3 2 2 2 1 1 2 3 2 2 1 1 1 1 2 1 2 2 2 2 Wind gust SD(kts)
P06 0 5 13 3 2 2 0 0 0 0 0 6-hr PoP(%)
P12 15 8 2 0 0 12-hr PoP(%)
Q06 0 0 1 0 0 0 0 0 0 0 0 6-hr QPF(.01in)
Q12 1 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 1 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 3-hr Tstm prob(%)
T06 0 0 0 1 2 0 0 0 0 0 0 6-hr Tstm prob(%)
T12 0 2 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 12 12 0 15 4 11 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 81 82 82 82 79 70 69 68 67 70 70 67 66 66 65 72 94 99 92 94 93 93 92 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 22 22 35 35-88-88-88-88-88-88-88-88-88-88-88-88-88-88-88 Ceiling height*
IFC 0 0 2 3 15 13 10 3 1 1 3 2 4 3 9 3 0 0 1 3 5 4 8 Prob cig<1000ft(%) IFR
LCB 90 40 38 29 16 15 24 29 60110 28 18 60 29 50100120100100130200120120 Lowest cloud base*
VIS 100100100100100100100100100100100100100100100100100100100100100100100 Visibility*
IFV 1 0 1 0 3 8 8 1 0 0 0 0 2 5 6 1 0 0 0 0 2 5 7 Prob vsby<3mi(%) IFR
MHT 38 37 10 4 8 4 11 33 45 44 11 3 2 2 4 31 39 33 4 2 1 1 2 MixHgt 100s feet AGL
TWD 28 28 28 29 27 27 26 28 28 28 30 33 5 8 8 31 30 32 35 6 9 9 9 Transport wind dir
TWS 8 9 8 6 6 5 4 7 11 10 8 5 4 3 3 5 5 6 6 5 4 5 5 Transport wind spd(kts)
SOL 83 52 3 2 0 0 15 33 71 49 5 2 0 0 9 48 82 58 19 10 0 0 4 Solar rad (10s W/m2)
DAILY TO 7 DAYS:
DTTO3 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 49| 63 44| 70 50| 76 53| 67 52| 59 50| 59 48| 64 48 48 78 Max/Min Temp(F)
XND 2| 2 3| 3 2| 3 3| 5 2| 6 2| 6 4| 7 4 SD of max/min temps(F)
TMP 51| 63 46| 70 52| 74 54| 65 54| 57 53| 58 50| 63 51 Temperature(F)
TSD 2| 2 1| 3 2| 3 2| 5 2| 6 2| 6 4| 7 4 SD of temp(F)
DPT 45| 51 40| 50 37| 53 46| 57 47| 57 47| 57 43| 55 41 Dew point temp(F)
DSD 2| 2 3| 4 4| 3 4| 3 3| 3 3| 3 4| 4 5 Dew point temp SD(F)
WBG 49| 59 44| 63 47| 66 51| 63 51| 57 51| 58 47| 61 47 Wet bulb temp(F)
SKY 65| 7 32| 9 14| 26 56| 34 72| 85 84| 67 59| 47 33 Sky cover(%)
SSD 29| 19 38| 8 8| 22 23| 22 28| 13 15| 24 30| 25 28 Sky cover SD(%)
WDR 29| 29 10| 31 9| 29 16| 27 19| 22 20| 28 15| 29 10 Wind dir (deg)
WSP 2| 8 2| 6 3| 6 1| 8 3| 6 3| 5 3| 5 3 Wind spd (kts)
WSD 1| 1 1| 1 1| 1 1| 2 2| 3 2| 3 1| 2 2 Wind spd SD(kts)
GST 5| 14 4| 11 6| 11 3| 14 9| 13 9| 11 6| 10 7 Wind gust(kts)
GSD 2| 2 1| 2 2| 2 2| 3 5| 6 5| 5 3| 3 3 Wind gust SD(kts)
P12 15| 8 2| 0 0| 0 3| 23 32| 63 87| 72 50| 38 21 -99-99 12-hr PoP(%)
Q12 1| 0 0| 0 0| 0 0| 5 2| 36 61| 24 12| 11 0 12-hr QPF(.01in)
Q24 | 0| 0| 0| 7| 97| 36| 11 44 24-hr QPF(.01in)
DUR 0| 0 0| 0 0| 0 0| 1 1| 5 8| 4 3| 3 0 Duration of precip(hrs)
T12 0| 2 0| 0 0| 1 1| 13 10| 5 9| 12 10| 11 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 15| 0 0| 0 0| 1 10| 20 39| 83 86| 69 24| 30 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 70| 70 66| 99 93| 99 96| 91 79| 83 73| 75 69| 80 78 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| 38 2| 49 7| 46 6| 45 7| 2 0| 20 2| 42 5 Solar rad (10s W/m2)
DAY 8, 9 AND 10:
DTTO3 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 69 51| 72 53| 74 54 Max/Min Temp(F)
XND 8 5| 9 4| 8 5 SD of max/min temps(F)
TMP 68 53| 72 55| 73 56 Temperature(F)
TSD 8 5| 8 4| 8 4 SD of temp(F)
DPT 55 41| 55 43| 56 44 Dew point temp(F)
DSD 6 6| 5 5| 5 5 Dew point temp SD(F)
WBG 64 48| 65 50| 66 51 Wet bulb temp(F)
SKY 27 32| 26 32| 21 46 Sky cover(%)
SSD 27 29| 26 15| 20 25 Sky cover SD(%)
WDR 33 9| 32 10| 29 10 Wind dir (deg)
WSP 5 3| 5 3| 5 3 Wind spd (kts)
WSD 2 2| 2 2| 2 2 Wind spd SD(kts)
GST 10 7| 10 6| 10 6 Wind gust(kts)
GSD 3 4| 3 4| 3 3 Wind gust SD(kts)
P12 22 12| 10 7| 5 6 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 19 6| 12 3| 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 86 84| 90 90| 96 95 Snow level 100s feet MSL
I12 0 0| 0 0| 0 0 12-hr ice(1/100in)
SOL 11 8| 17 10| 24 16 Solar rad (10s W/m2)
STANDARD DEVIATION AND THRESHOLD PROBABILITIES:
DTTO3 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 50| 63 45| 70 50| 76 53| 67 52| 59 50| 59 47| 64 48| 69 51| 69 Mean min/max temp(F)
TXNSD 2| 2 3| 3 2| 3 3| 5 2| 6 2| 6 4| 7 4| 8 4| 8 SD min/max temp(F)
TXNP1 47| 60 42| 66 47| 72 50| 61 49| 52 46| 52 43| 55 43| 57 44| 57 10th percentile min/max temp(F)
TXNP2 48| 62 43| 68 49| 74 52| 63 50| 54 48| 54 45| 58 45| 62 48| 62 25th percentile min/max temp(F)
TXNP5 51| 63 44| 70 50| 76 54| 68 52| 59 50| 58 48| 63 48| 70 51| 70 50th percentile min/max temp(F)
TXNP7 52| 64 45| 73 52| 78 55| 71 53| 63 51| 62 50| 69 50| 75 54| 75 75th percentile min/max temp(F)
TXNP9 53| 66 50| 73 53| 79 56| 73 54| 68 52| 68 51| 74 54| 78 57| 78 90th percentile min/max temp(F)
WSPP1 1| 6 1| 5 1| 5 0| 5 2| 2 2| 0 1| 3 1| 1 1| 3 10th percentile wnd(kts)
WSPP2 2| 7 2| 5 2| 6 1| 6 2| 4 3| 3 2| 4 2| 4 2| 4 25th percentile wnd(kts)
WSPP5 2| 7 2| 6 3| 6 2| 7 3| 6 3| 5 3| 5 3| 5 3| 5 50th percentile wnd(kts)
WSPP7 3| 8 2| 6 4| 7 2| 8 5| 7 5| 7 3| 6 4| 6 5| 6 75th percentile wnd(kts)
WSPP9 3| 8 3| 7 4| 7 3| 9 6| 9 7| 8 4| 7 6| 7 7| 8 90th percentile wnd(kts)
W24P1 | 8 | 8 | 7 | 7 | 8 | 6 | 6 | 6 | 6 10th percentile 24hr sustained wnd exceedance(kts)
W24P2 | 8 | 8 | 7 | 7 | 8 | 7 | 7 | 7 | 7 25th percentile 24hr sustained wnd exceedance(kts)
W24P5 | 8 | 8 | 7 | 8 | 8 | 8 | 8 | 7 | 7 50th percentile 24hr sustained wnd exceedance(kts)
W24P7 | 9 | 9 | 8 | 8 | 9 | 9 | 9 | 8 | 8 75th percentile 24hr sustained wnd exceedance(kts)
W24P9 | 9 | 9 | 8 | 8 | 10 | 10 | 10 | 9 | 9 90th percentile 24hr sustained wnd exceedance(kts)
G24P1 | 14 | 14 | 11 | 12 | 14 | 13 | 11 | 10 | 10 10th percentile 24hr wnd gust exceedance(kts)
G24P2 | 15 | 15 | 11 | 12 | 15 | 16 | 12 | 12 | 11 25th percentile 24hr wnd gust exceedance(kts)
G24P5 | 16 | 16 | 13 | 14 | 17 | 18 | 16 | 14 | 13 50th percentile 24hr wnd gust exceedance(kts)
G24P7 | 17 | 17 | 14 | 15 | 19 | 22 | 20 | 16 | 16 75th percentile 24hr wnd gust exceedance(kts)
G24P9 | 18 | 18 | 15 | 16 | 20 | 28 | 24 | 18 | 19 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| 43| 3| 0| 0| 25th percentile 24hr QPF(1/100in)
Q24P5 | 0| 0| 0| 0| 115| 41| 0| 0| 50th percentile 24hr QPF(1/100in)
Q24P7 | 0| 0| 0| 14| 141| 81| 24| 0| 75th percentile 24hr QPF(1/100in)
Q24P9 | 0| 0| 0| 37| 186| 127| 59| 32| 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|016 019|013 013|009 012|010 012|010 012|012 013|012 012|011 012|010 10th percentile MSLP(mb)
SLPP2 019|017 020|014 013|009 013|011 014|012 012|013 015|014 016|014 015|013 25th percentile MSLP(mb)
SLPP5 019|017 020|015 014|010 014|012 015|014 015|015 018|016 018|016 017|015 50th percentile MSLP(mb)
SLPP7 020|018 021|016 015|011 015|013 016|016 018|016 020|018 020|018 019|016 75th percentile MSLP(mb)
SLPP9 020|018 021|017 016|012 016|014 018|017 020|019 022|020 022|019 021|018 90th percentile MSLP(mb)