National Weather Service United States Department of Commerce

Print This Forecast (Printer-Friendly)

EXPERIMENTAL...FIRE WEATHER POINT FORECAST MATRICES
NATIONAL WEATHER SERVICE Blacksburg VA
931 PM EST Mon Jan 20 2025

NCZ005-210900-
RAWS 310540
36.38N  79.70W Elev. 858 ft
931 PM EST Mon Jan 20 2025

Date           01/20/25      Tue 01/21/25            Wed 01/22/25            Thu
UTC 3hrly     21 00 03 06 09 12 15 18 21 00 03 06 09 12 15 18 21 00 03 06 09 12
EST 3hrly     16 19 22 01 04 07 10 13 16 19 22 01 04 07 10 13 16 19 22 01 04 07

MIN/MAX TEMP                 13          28          10          27          14
TEMP                19 16 15 14 20 26 27 25 23 20 14 12 19 25 27 23 20 18 15 15
DEWPT                0  0  0 -2 -1 -3 -2  4  6  4  1 -3 -4 -5 -5 -2 -1  1  1  1
MIN/MAX RH                   52          26          55          24          55
RH                  42 48 50 48 39 27 28 40 47 49 55 50 35 26 24 33 39 46 53 53
WIND DIR             N  N  N NE NE  N NW  N NW  N  N  N  N NE SE  E SE  S  S SW
WIND SPD             4  4  4  3  3  2  2  2  5 10 10  9  8  4  3  3  4  4  3  3
CLOUDS              CL CL FW SC B2 OV B2 OV B2 SC SC FW FW FW FW FW FW FW SC B1
CLOUDS(%)            2  2 10 45 71 89 76 89 87 49 28 11  6  9 16  7  9 13 28 64
VSBY                10 10 10 10 10 10 10 10 10 10 10 10 10 10 10 10            
POP 12HR                      0          10          10           0           0
FLURRIES                              IS                                       
LAL                  1  1  1  1  1  1  1  1  1  1  1  1  1  1  1               
HAINES               4  4  4  5  5  5  5  4  4  4  4  4  4  4  4  4            
MIX HGT             <1 <1 <1  1  2  3  3 <1  2  3  3  2  3  4  3 <1            
T WIND DIR           N  N  N  N  N  N  N NW  N NW  N  N  N NE SE SE            
T WIND SPD           9  8  8  9  5  4  4  3 12 17 17 18 12  3  3  3            
DISPERSION          VP VP VP             VP PR FR FR             VP VP VP VP   
ADI                  4  4  4 16 14 14 15  2  8 23 12 43 38 12 14  2            
MAX LVORI            2  2  2  2  2  2  2  2  2  2  2  1  1  2  2  2            
STABILITY            F  G  G  B  C  C  C  F  E  D  E  C  C  C  B  G            
CEILING                    None 10000  9300 12900  None  None  None  None      
STA PRES                  29.77 29.77 29.67 29.71 29.72 29.79 29.72            


Date           01/23Fri 01/24/25Sat 01/25/25Sun 01/26/25Mon 01/27/25
UTC 6hrly     18 00 06 12 18 00 06 12 18 00 06 12 18 00 06 12 18 00
EST 6hrly     13 19 01 07 13 19 01 07 13 19 01 07 13 19 01 07 13 19

MAX/MIN TEMP       37      21      41      21      45      26      49      33      49
TEMP          34 31 25 21 40 33 24 21 42 36 29 27 47 42 36 33 47 43
DEWPT          3  8  9 11 15 16 15 14 18 22 22 24 29 31 32 33 37 36
RH            26 37 50 65 36 49 68 74 37 56 75 88 49 65 85100 68 76
WIND SPD          <15     <15     <15     <15     <15     <15     <15     <15     <15
AVG CLOUDS    B1 B2 B1 SC FW SC FW FW FW FW SC B1 B1 B1 B1 B1 B1 B1
POP 12HR            5       5       5       0       0       0      10      10      40
RAIN                                                           C  C

$$


This product is for planning and review purposes only and is not
to be substituted for an official fire weather spot forecast. The
data displayed are calculated from a 2.5 by 2.5 km digital
database and only approximates weather conditions in highly
varying terrain. Please relay any comments you have to the NWS via
email at rnk.webmaster@noaa.gov.

Below is a weather element key for this product.
(Note...winds do not reflect local terrain effects.)

DAY 1 THROUGH 3...
MAX/MIN TEMP OR MIN/MAX TEMP(F).....Maximum/Minimum air temperature
TEMP(F).............................Air temperature
DEWPT(F)............................Dew point temperature
MIN/MAX RH OR MAX/MIN RH(%).........Maximum/Minimum humdity
RH(%)...............................Relative humidity
WIND DIR(8 POINT COMPASS)...........Wind direction
WIND SPD(MPH).......................Wind speed
CLOUDS(CATEGORY)....................Cloud cover category
     EXAMPLE: CL = CLEAR; FW = FEW; SC = Scattered; BK = Broken; OV = Overcast
CLOUDS(%)...........................Cloud cover as a percentage
VSBY................................Visibility value in statute miles
POP 12HR(%).........................Probability for accumulating precipitation
WEATHER...
   TYPE...
       RAIN...........Rain
       RAIN SHWRS.....Rain showers
       TSTMS..........Thunderstorms
       DRIZZLE........Drizzle
       SNOW...........Snow
       SNOWSHWRS......Snow showers
       SLEET..........Sleet
       FRZG RAIN......Freezing rain
       FRZG DRZL......Freezing drizzle
   COVERAGE...
       IS.............Isolated
       SC.............Scattered
       NM.............Numerous
       O..............Occasional
       S..............Slight chance
       C..............Chance
       L..............Likely
       WD.............Widespread
       D..............Definite
       AR.............Areas
       PA.............Patchy
LAL(CATEGORY).......................Lightning Activity Level
HAINES(CATEGORY)....................Haines Index
MIX HGT(THOUSANDS OF FT AGL)........Mixing height
     Example: 6 = 6000 feet; 12 = 12000 feet; <1 = Less than 1000 foot
t WIND DIR(8 POINT COMPASS).........Transport Wind direction
T WIND SPD(MPH).....................Transport Wind speed
DISPERSION(CATEGORY)................Smoke Dispersion category
     Values: vp =Very Poor;PR = Poor; FR = Fair; GD = Good;
ADI (INDEX).........................Atmospheric Dispersion Index
MAX LVORI (INDEX)...................Low Visibility Occurrence Risk Index
STABILITY (CATEGORY)................Pasquill Turner Stability
CEILING (FT)........................Ceiling
STA PRES (INCHES MERCURY)...........Station pressure

Day 4 Through 7...
MAX/MIN TEMP OR MIN/MAX TEMP(F).....Maximum/Minimum air temperature
TEMP(F).............................Air temperature
DEWPT(F)............................Dew Point temperature
RH(%)...............................Relative Humidity
WIND SPD(MPH).......................Wind Speed
     Example: <15 = less than 15 MPH; 15> = 15 MPH or greater
AVE CLOUDS(CATEGORY)................Average Cloud Cover Category
POP 12HR(%).........................Probability for accumulating precipitation
WEATHER.............................See Day 1 through 3 weather descriptions