National Weather Service United States Department of Commerce

Print This Forecast (Printer-Friendly)

EXPERIMENTAL...FIRE WEATHER POINT FORECAST MATRICES
NATIONAL WEATHER SERVICE Blacksburg VA
601 AM EST Thu Nov 20 2025

VAZ020-202100-
RAWS 441801
37.99N  79.76W Elev. 2160 ft
601 AM EST Thu Nov 20 2025

Date             Thu 11/20/25            Fri 11/21/25            Sat 11/22/25
UTC 3hrly     09 12 15 18 21 00 03 06 09 12 15 18 21 00 03 06 09 12 15 18 21 00
EST 3hrly     04 07 10 13 16 19 22 01 04 07 10 13 16 19 22 01 04 07 10 13 16 19

MAX/MIN TEMP                 55          45          61          53          62
TEMP             43 46 52 53 49 48 47 47 48 52 58 60 57 57 57 56 54 57 61 58 50
DEWPT            42 43 46 46 44 43 43 43 45 49 52 53 52 52 52 52 50 50 46 41 38
MAX/MIN RH                   73          94          76          87          54
RH               96 89 80 77 83 83 86 86 89 89 80 78 83 83 83 86 86 77 58 53 63
WIND DIR         SW  S SW SW SW SW  W  W SW SW SW SW SW SW  W  W  W  W NW NW NW
WIND SPD          5  5  4  3  2  2  2  2  2  2  2  2  2  2  3  3  2  2  2  2  2
CLOUDS           OV OV B2 SC B2 B2 OV OV OV OV OV B2 OV OV B2 B2 B1 B1 B1 SC SC
CLOUDS(%)       100100 72 46 74 84100100100 92 91 87 89 93 84 80 61 61 56 38 40
VSBY              3  6  9 10 10  8  5  4  3  4  4  5  5  4  6 10  6  6  6  6  6
POP 12HR                      5          60          70          80          40
RAIN                                   S  L  L  L  L  D  D  L  L  C  C  S  S   
Obvis            PF PF                                                         
MIX HGT          <1 <1  2  1 <1 <1 <1 <1 <1 <1 <1 <1 <1 <1 <1 <1 <1  2  2  2 <1
T WIND DIR        S  S SW  W SW  W  W SW SW  S SW SW  S SW SW  W  W NW NW NW NW
T WIND SPD        4  3  3  4  6  3  1  1  1  2  3  3  4  6 10  6 11 17  8  9  8
DISPERSION                   VP VP VP VP             VP VP VP VP             VP
ADI               5  4  6  6  3  2  1  1  1  2  3  3  2  3  5  3  9 37 22 26  4
MAX LVORI         9  6  4  4  5  5  5  5  6  7  5  4  5  5  5  6  5  3  2  2  3
STABILITY         D  D  D  C  F  F  D  D  D  C  C  C  F  F  F  F  C  C  C  B  G
CEILING               700   600   600   600   600   500   400   300  1900  None
STA PRES            27.94 27.90 27.91 27.87 27.84 27.75 27.67 27.64 27.74 27.80


Date          Sun 11/23/25Mon 11/24/25Tue 11/25/25Wed 11/26/25
UTC 6hrly     06 12 18 00 06 12 18 00 06 12 18 00 06 12 18 00
EST 6hrly     01 07 13 19 01 07 13 19 01 07 13 19 01 07 13 19

MIN/MAX TEMP       37      59      38      60      42      55      47      62
TEMP          43 38 58 47 43 38 59 48 44 43 52 48 49 48 61 52
DEWPT         36 33 33 32 32 32 33 32 32 36 41 41 43 44 47 41
RH            76 82 39 56 65 79 37 54 62 76 66 77 80 86 60 66
WIND SPD          <15     <15     <15     <15     <15     <15     <15     <15
AVG CLOUDS    SC SC FW FW FW SC SC B1 B2 B2 B2 B2 B2 B1 B1 SC
POP 12HR           10       5       5      10      20      40      50      20
RAIN                                      S  C  C  C  C  S   

$$


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

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