National Weather Service United States Department of Commerce

Print This Forecast (Printer-Friendly)

EXPERIMENTAL...FIRE WEATHER POINT FORECAST MATRICES
NATIONAL WEATHER SERVICE Blacksburg VA
231 AM EDT Sat Apr 18 2026

NCZ003-190800-
RAWS 310301
36.48N  80.86W Elev. 1300 ft
231 AM EDT Sat Apr 18 2026

Date           04/17/26      Sat 04/18/26            Sun 04/19/26            Mon
UTC 3hrly     21 00 03 06 09 12 15 18 21 00 03 06 09 12 15 18 21 00 03 06 09 12
EDT 3hrly     17 20 23 02 05 08 11 14 17 20 23 02 05 08 11 14 17 20 23 02 05 08

MIN/MAX TEMP                 56          87          47          64          40
TEMP                      58 60 77 84 86 79 71 66 56 48 53 60 62 56 48 43 41 44
DEWPT                     48 49 54 54 55 56 58 58 49 40 35 29 25 25 25 26 28 29
MIN/MAX RH                   70          32          79          24          60
RH                        69 67 45 36 35 45 63 75 77 74 50 31 24 30 40 51 59 55
WIND DIR                   N  N  S SW  S SW  W NW NW NW NW NW NW NW NW  W NW NW
WIND SPD                   1  0  2  6  6  2  2  2  9 14 14 12 10  5  2  2  2  2
WIND GUST                                12       25 37 34 25 24 18            
CLOUDS                    SC SC SC SC SC B1 B1 B2 B2 OV B2 SC FW CL CL CL FW FW
CLOUDS(%)                 41 31 33 36 47 56 65 70 85 89 79 49 16  4  3  5  7 16
VSBY                      10 10 10 10 10 10 10 10 10 10 10 10 10 10 10 10 10   
POP 12HR                      0          10          60          20           0
RAIN SHWRS                               SC SC IS IS IS IS                     
TSTMS                                    IS IS                                 
MIX HGT                   <1 <1  4  7  8 <1 <1 <1  2  2  3  6  6  1            
T WIND DIR                 N  N SW SW SW SW SW  W NW NW NW NW NW NW            
T WIND SPD                 2  1 17 17 17  9  6 10 28 34 34 29 25 13            
DISPERSION                VP             VP VP VP PR             PR VP VP VP   
ADI                        1  1 78128140  4  3  5 19 73118133175  6            
MAX LVORI                  3  3  1  1  1  2  3  3  3  1  1  1  1  2            
STABILITY                  G  A  A  B  B  F  F  F  E  D  C  C  B  F            
CEILING                    None  None  None  4200  2500 14400  None  None      
STA PRES                  28.09 28.09 28.01 27.98 28.01 28.14 28.17            


Date           04/20Tue 04/21/26Wed 04/22/26Thu 04/23/26Fri 04/24/26
UTC 6hrly     18 00 06 12 18 00 06 12 18 00 06 12 18 00 06 12 18 00
EDT 6hrly     14 20 02 08 14 20 02 08 14 20 02 08 14 20 02 08 14 20

MAX/MIN TEMP       64      34      70      45      80      50      82      53      85
TEMP          62 56 38 39 66 64 48 50 78 73 56 55 80 74 58 57 83 77
DEWPT         28 24 23 22 29 35 35 36 42 43 44 46 49 50 47 47 48 48
RH            27 29 54 50 25 34 60 58 28 34 64 72 34 43 67 69 30 36
WIND SPD          <15     <15     <15     <15     <15     <15     <15     <15     <15
AVG CLOUDS    FW FW CL CL CL FW SC FW SC FW FW FW FW FW SC FW FW SC
POP 12HR            0       0       0       0       5       0       5       0       5

$$


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