National Weather Service United States Department of Commerce

Print This Forecast (Printer-Friendly)

EXPERIMENTAL...FIRE WEATHER POINT FORECAST MATRICES
NATIONAL WEATHER SERVICE Blacksburg VA
802 AM EDT Sun Apr 19 2026

NCZ006-192000-
RAWS 310801
36.37N  79.29W Elev. 580 ft
802 AM EDT Sun Apr 19 2026

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

MAX/MIN TEMP                 68          41          66          35          68
TEMP                55 63 66 59 47 44 41 43 59 64 65 54 45 40 35 39 55 65 68 63
DEWPT               41 34 28 24 23 24 25 29 34 30 25 22 21 22 22 24 25 27 29 32
MAX/MIN RH                   23          58          22          59          22
RH                  59 34 24 26 38 45 52 57 39 28 22 28 38 48 59 54 31 24 23 31
WIND DIR            NW NW NW  N NW SW SW  W NW NW NW  N  N  N NE NE  E SW  S  S
WIND SPD            10  8  9  4  2  2  2  3  6  9  9  4  3  2  2  2  2  2  4  3
WIND GUST           23                         20 19                           
CLOUDS              OV B1 SC CL CL FW CL FW FW FW FW CL CL CL FW FW CL FW FW FW
CLOUDS(%)           91 69 35  5  5  7  5 17 20 17  7  5  4  5  6  7  3 10  8 17
VSBY                10 10 10 10 10 10 10 10 10 10 10 10 10 10 10 10 10 10 10 10
POP 12HR                     50           0           0           0           0
RAIN SHWRS          IS                                                         
MIX HGT              3  5  7 <1 <1 <1 <1 <1  6  7  8 <1 <1 <1 <1  1  4  5  5 <1
T WIND DIR           N NW NW NW NW SW SW  W NW  W NW  N  N  N  N  E  N SW SW  S
T WIND SPD          20 20 20 10  3  3  5  5 11 20 19  9 10  5  3  5  3  5 14  6
DISPERSION                   VP VP VP VP             VP VP VP VP             VP
ADI                 61125155  5  2  2  3  6 74149165  4  5  3  2  9 18 38 93  3
MAX LVORI            1  1  1  2  2  2  2  2  1  1  1  2  2  2  3  2  2  1  1  2
STABILITY            C  B  B  F  G  G  G  A  B  B  B  F  G  G  G  A  A  A  A  G
CEILING              1800  None  None  None  None  None  None  None  None  None
STA PRES            29.42 29.43 29.53 29.52 29.56 29.54 29.64 29.68 29.70 29.55


Date          Wed 04/22/26Thu 04/23/26Fri 04/24/26Sat 04/25/26
UTC 6hrly     06 12 18 00 06 12 18 00 06 12 18 00 06 12 18 00
EDT 6hrly     02 08 14 20 02 08 14 20 02 08 14 20 02 08 14 20

MIN/MAX TEMP       49      83      53      84      57      88      60      86
TEMP          53 53 81 75 59 57 82 76 62 60 85 79 65 63 84 76
DEWPT         33 37 42 41 47 49 47 48 46 50 48 47 49 51 53 55
RH            46 54 25 29 64 75 29 37 56 69 28 32 56 65 34 48
WIND SPD          <15     <15     <15     <15     <15     <15     <15     <15
AVG CLOUDS    FW SC SC SC FW FW CL FW SC FW FW SC SC SC SC B1
POP 12HR            0       5       5       5       0       5      10      40
RAIN SHWRS                                              IS SC
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