National Weather Service United States Department of Commerce

Print This Forecast (Printer-Friendly)

EXPERIMENTAL...FIRE WEATHER POINT FORECAST MATRICES
NATIONAL WEATHER SERVICE Blacksburg VA
301 PM EDT Thu Apr 16 2026

VAZ046-170800-
RAWS 441101
37.39N  78.80W Elev. 804 ft
301 PM EDT Thu Apr 16 2026

Date           04/16/26      Fri 04/17/26            Sat 04/18/26            Sun
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                 64          85          59          90          59
TEMP          89 81 75 71 67 66 78 83 85 78 69 63 60 62 79 87 89 80 73 70 65 60
DEWPT         49 51 51 55 56 58 56 51 49 49 50 51 52 54 57 53 53 53 54 55 55 54
MIN/MAX RH                   77          29          79          29          80
RH            25 35 43 57 68 75 47 33 29 36 51 65 75 75 47 31 29 39 51 59 70 81
WIND DIR      SW SW  W  W  W  W NW NW NW NW NW  N NE NE  S SW SW  S  S SW SW  W
WIND SPD      13  5  6  5  5  5  5  5  6  3  2  2  2  2  5  8  8  5  6  6  8 10
WIND GUST                                                                    20
CLOUDS        FW FW FW B1 B1 B1 FW FW FW FW FW FW SC FW SC SC SC B1 B1 B2 B2 OV
CLOUDS(%)      8 18 24 61 56 51 22  8  7  7 10 22 28 18 31 27 31 57 67 70 76 88
VSBY          10 10 10  9  9  9  9 10 10 10 10 10 10 10 10 10 10  7  7  6  6   
POP 12HR                     30          10           0           5          40
RAIN SHWRS                                                       SC SC SC SC NM
TSTMS                                                                        IS
MIX HGT        8 <1 <1 <1 <1 <1  4  7  8 <1 <1 <1 <1 <1  4  7  8 <1            
T WIND DIR    SW SW  W  W  W  W NW NW NW  W  W NW  N  N SW SW SW SW            
T WIND SPD    18  8  9 14  5 13 14 13 12  2  2  3  2  1 12 14 17  9            
DISPERSION       PR PR PR PR             VP VP VP VP             PR PR PR PR   
ADI           91  4  4 10  4 13 82120102  1  1  2  1  1 59117145  6            
MAX LVORI      1  2  2  2  3  3  1  1  1  2  2  3  4  4  1  1  1  2            
STABILITY      C  F  F  E  E  A  A  A  B  G  G  G  G  A  A  B  B  E            
CEILING              None  None  None  None  None  None  None  None  5800      
STA PRES            29.20 29.25 29.28 29.23 29.26 29.26 29.24 29.13            


Date           04/19Mon 04/20/26Tue 04/21/26Wed 04/22/26Thu 04/23/26
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       69      40      62      35      70      52      81      53      80
TEMP          62 57 46 43 59 56 40 39 65 65 56 56 80 72 59 56 77 72
DEWPT         43 30 26 24 18 17 21 21 27 31 34 40 44 43 45 46 48 47
RH            50 35 45 47 20 21 46 48 24 28 43 55 28 35 60 69 36 41
WIND SPD          <15     <15     <15     <15     <15     <15     <15     <15     <15
AVG CLOUDS    B2 B1 FW CL CL CL CL CL CL FW FW FW SC SC FW FW FW SC
POP 12HR           60      10       0       0       0       0      10       5      20
RAIN SHWRS    NM SC                                           IS IS
TSTMS         IS                                                   

$$


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