721  
FNAK71 PAFC 130401  
FWSAER  
 
SPOT FORECAST FOR NELCHINA GLACIER FIRE...SOA DOF  
NATIONAL WEATHER SERVICE ANCHORAGE AK  
801 PM AKDT SAT JUL 12 2025  
 
FORECAST IS BASED ON FORECAST START TIME OF 2000 AKDT ON JULY 12.    
DISCUSSION
 
 
LIGHT SOUTHERLY WINDS THIS AFTERNOON WILL RETURN TO WESTERLY  
TONIGHT AND CHANCES FOR PRECIPITATION DECREASES FOR OVERNIGHT.  
WINDS WILL BECOME LIGHT WITH PATCHY FOG POSSIBLE THROUGHOUT THE  
MORNING HOURS. SOUTHERLY WINDS SET UP FOR A FEW HOURS IN THE  
AFTERNOON. A FEW LIGHTNING STRIKES ARE NOT EXPECTED SUNDAY  
AFTERNOON, BUT THEIR OCCURANCE IN THE VICINITY JUST TO THE NORTH  
IS POSSIBLE. BRIEF GUSTS THROUGH THE NELCHINA GLACIER TERRAIN GAP  
IS POSSIBLE IN THE LATE AFTERNOON AND EVENING SUNDAY BEFORE  
WESTERLY WINDS RETURN THROUGH TAHNETA PASS SUNDAY NIGHT INTO  
MONDAY.  
 
WINDS ARE EXPECTED STRENGTHEN OVERALL FOR MONDAY WITH GUSTY WINDS  
OF 15 TO 20 MPH POSSIBLE. THE CHALLENGE WITH THE WIND FORECAST  
FOR MONDAY IS THAT WINDS WILL STRENGTHEN FROM BOTH TAHNETA PASS  
AND THROUGH ANY SOUTHERLY TERRAIN GAPS AS A WEAK FRONT LIFTS  
ACROSS SOUTHCENTRAL FROM SOUTH TO NORTH EARLY MONDAY MORNING. IT  
WILL LIKELY REMAIN BREEZY THROUGHOUT THE DAY MONDAY AND THE  
POTENTIAL FOR SHOWERS INCREASES LATER IN THE DAY.  
 
   
REST OF TONIGHT
 
 
SKY/WEATHER.........PARTLY CLOUDY (30-40 PERCENT) THEN BECOMING  
MOSTLY CLOUDY (60-70 PERCENT). SCATTERED RAIN  
SHOWERS AND SLIGHT CHANCE OF THUNDERSTORMS  
EARLY IN THE EVENING. PATCHY FOG AFTER 3 AM.  
CWR.................10 PERCENT.  
CHANCE OF PCPN......30 PERCENT.  
TSTM COVERAGE.......ISOLATED.  
MIN TEMPERATURE.....AROUND 45.  
MAX HUMIDITY........100 PERCENT.  
WIND (20 FT)........WEST WINDS 9 TO 13 MPH. GUSTY AND ERRATIC WINDS  
EXPECTED NEAR THUNDERSTORMS EARLY IN THE  
EVENING.  
MIXING HEIGHT.......400 FT AGL.  
TRANSPORT WINDS.....WEST 7 TO 8 MPH.  
PCPN AMOUNT.........0.01 INCHES.  
SNOWFALL AMOUNT.....0.0 INCHES.  
 
TIME (AKDT) 8PM 9PM 10P 11P MID 1AM 2AM 3AM 4AM 5AM  
SKY (%).........40 40 28 28 28 57 57 57 72 72  
WEATHER COV.....SCT SCT PTY PTY  
WEATHER TYPE....RW RW FOG FOG  
CWR.............10 10 10 10 10 10 10 10 10 10  
CHC OF PCPN (%).30 30 10 10 10 10 10 10 10 10  
TEMP............57 55 53 51 50 48 47 46 45 46  
RH..............67 72 78 82 85 89 93 97 100 98  
20 FT WIND DIR..S S W W W W W W W W  
20 FT WIND SPD..13 13 9 9 9 10 10 10 9 9  
20 FT WIND GUST.16 16 12 12 12 14 14 14 12 12  
MIX HGT (KFT)...1.7 1.7 0.4 0.4 0.4 0.4 0.4 0.4 0.4 0.4  
TRANSP WIND DIR.W W W W W W W W W W  
TRANSP WIND SPD.8 8 7 7 7 8 8 8 7 7  
   
SUNDAY
 
 
SKY/WEATHER.........PARTLY SUNNY (50-60 PERCENT). PATCHY FOG IN THE  
MORNING. ISOLATED RAIN SHOWERS IN THE LATE  
MORNING AND AFTERNOON.  
CWR.................10 PERCENT DECREASING TO 0 PERCENT.  
CHANCE OF PCPN......20 PERCENT.  
TSTM COVERAGE.......NONE.  
MAX TEMPERATURE.....AROUND 66.  
MIN HUMIDITY........45 PERCENT.  
WIND (20 FT)........WEST WINDS 6 TO 9 MPH EARLY IN THE MORNING  
BECOMING LIGHT, THEN BECOMING SOUTH 5 TO 7 MPH  
IN THE AFTERNOON.  
MIXING HEIGHT.......4400 FT AGL.  
TRANSPORT WINDS.....WEST 5 TO 7 MPH SHIFTING TO THE SOUTHEAST  
AROUND 5 MPH IN THE LATE MORNING AND EARLY  
AFTERNOON, THEN SHIFTING TO THE SOUTHWEST  
AROUND 8 MPH LATE IN THE AFTERNOON.  
PCPN AMOUNT.........0.00 INCHES.  
SNOWFALL AMOUNT.....0.0 INCHES.  
 
TIME (AKDT) 6AM 7AM 8AM 9AM 10A 11A 12P 1PM 2PM 3PM 4PM 5PM  
SKY (%).........72 56 56 56 35 35 35 40 40 40 40 40  
WEATHER COV.....PTY PTY PTY PTY ISO ISO ISO ISO ISO ISO ISO ISO  
WEATHER TYPE....FOG FOG FOG FOG RNF RNF RNF RW RW RW RW RW  
CWR.............10 0 0 0 0 0 0 0 0 0 0 0  
CHC OF PCPN (%).10 10 10 10 20 20 20 20 20 20 20 20  
TEMP............46 47 50 53 55 58 60 62 64 65 66 65  
RH..............95 92 83 76 69 63 58 53 50 47 45 47  
20 FT WIND DIR..W W W W SW SW SW S S S S S  
20 FT WIND SPD..9 6 6 6 3 3 3 5 5 5 7 7  
20 FT WIND GUST.12 8 8 8 5 5 5 6 6 6 9 9  
MIX HGT (KFT)...0.4 0.9 0.9 0.9 2.8 2.8 2.8 4.4 4.4 4.4 4.3 4.3  
TRANSP WIND DIR.W W W W E E E S S S SW SW  
TRANSP WIND SPD.7 5 5 5 5 5 5 5 5 5 8 8  
   
SUNDAY NIGHT
 
 
SKY/WEATHER.........PARTLY CLOUDY TO MOSTLY CLOUDY (35-55 PERCENT)  
THEN BECOMING MOSTLY CLOUDY (60-70 PERCENT).  
ISOLATED RAIN SHOWERS EARLY IN THE EVENING,  
THEN SCATTERED RAIN SHOWERS EARLY IN THE EVENING.  
ISOLATED RAIN SHOWERS AFTER 3 AM.  
CWR.................0 PERCENT.  
CHANCE OF PCPN......30 PERCENT.  
TSTM COVERAGE.......NONE.  
MIN TEMPERATURE.....AROUND 47.  
MAX HUMIDITY........91 PERCENT.  
WIND (20 FT)........SOUTH TO SOUTHWEST WINDS 7 TO 14 MPH SHIFT  
WEST 12 TO 14 MPH OVERNIGHT. GUSTS 10 TO 20 MPH.  
MIXING HEIGHT.......400 FT AGL.  
TRANSPORT WINDS.....WEST 8 TO 10 MPH.  
PCPN AMOUNT.........0.00 INCHES.  
SNOWFALL AMOUNT.....0.0 INCHES.  
 
TIME (AKDT) 6PM 7PM 8PM 9PM 10P 11P MID 1AM 2AM 3AM 4AM 5AM  
SKY (%).........40 52 52 52 42 42 42 51 51 51 80 80  
WEATHER COV.....ISO SCT SCT SCT ISO ISO  
WEATHER TYPE....RW RW RW RW RW RW  
CWR.............0 0 0 0 0 0 0 0 0 0 0 0  
CHC OF PCPN (%).20 30 30 30 10 10 10 10 10 10 20 20  
TEMP............64 63 60 58 56 54 51 49 49 48 48 48  
RH..............50 53 59 66 73 78 84 90 91 91 91 91  
20 FT WIND DIR..S SW SW SW SW SW SW W W W W W  
20 FT WIND SPD..7 12 12 12 14 14 14 14 14 14 12 12  
20 FT WIND GUST.9 15 15 15 18 18 18 18 18 18 15 15  
MIX HGT (KFT)...4.3 2.2 2.2 2.2 0.5 0.5 0.5 0.4 0.4 0.4 0.4 0.4  
TRANSP WIND DIR.SW W W W W W W W W W W W  
TRANSP WIND SPD.8 10 10 10 10 10 10 10 10 10 9 9  
   
MONDAY
 
 
SKY/WEATHER.........MOSTLY CLOUDY (75-85 PERCENT). ISOLATED RAIN  
SHOWERS IN THE MORNING, THEN SCATTERED RAIN  
SHOWERS IN THE AFTERNOON.  
CWR.................8 PERCENT.  
CHANCE OF PCPN......40 PERCENT.  
TSTM COVERAGE.......NONE.  
MAX TEMPERATURE.....AROUND 58.  
MIN HUMIDITY........53 PERCENT.  
WIND (20 FT)........SOUTHWEST WINDS 8 TO 13 MPH.  
MIXING HEIGHT.......3100 FT AGL.  
TRANSPORT WINDS.....SOUTHWEST 6 TO 9 MPH.  
PCPN AMOUNT.........0.03 INCHES.  
SNOWFALL AMOUNT.....0.0 INCHES.  
 
TIME (AKDT) 6AM 7AM 8AM 9AM 10A 11A 12P 1PM 2PM 3PM 4PM 5PM  
SKY (%).........80 65 65 65 89 89 89 74 74 74 90 90  
WEATHER COV.....ISO ISO ISO ISO ISO ISO ISO SCT SCT SCT SCT SCT  
WEATHER TYPE....RW RW RW RW RW RW RW RW RW RW RW RW  
CWR.............0 10 10 10 10 10 10 10 10 10 10 10  
CHC OF PCPN (%).20 20 20 20 20 20 20 30 30 30 40 40  
TEMP............47 47 49 50 52 54 55 57 58 58 58 57  
RH..............90 90 85 80 76 69 64 58 57 54 53 55  
20 FT WIND DIR..W W W W SW SW SW SW SW SW SW SW  
20 FT WIND SPD..12 8 8 8 8 8 8 9 9 9 13 13  
20 FT WIND GUST.15 10 10 10 10 10 10 12 12 12 16 16  
MIX HGT (KFT)...0.4 0.7 0.7 0.7 1.3 1.3 1.3 2.6 2.6 2.6 3.1 3.1  
TRANSP WIND DIR.W W W W SW SW SW SW SW SW SW SW  
TRANSP WIND SPD.9 7 7 7 6 6 6 6 6 6 8 8  
 

 
FORECASTER...RUX  
REQUESTED BY...TOBY STAPLETON  
TYPE OF REQUEST...WILDFIRE  
.TAG 2517468.5/AER  
.DELDT 07/12/25  
.FORMATTERVERSION 2.0.0  
.EMAIL DANIEL.WHITE@ALASKA.GOV,ANDY_JOHNSON@FIRENET.GOV,FIRENCOLORADO@GMAIL.COM,TOBY.STAPLETON@USDA.GOV,JERED.KEMP@ALASKA.GOV  
 
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