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EXPERIMENTAL...FIRE WEATHER POINT FORECAST MATRICES
NATIONAL WEATHER SERVICE Blacksburg VA
832 PM EDT Sat Apr 18 2026
NCZ005-190800-
RAWS 310540
36.38N 79.70W Elev. 858 ft
832 PM EDT Sat Apr 18 2026
Date 04/18/26 Sun 04/19/26 Mon 04/20/26 Tue
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 67 42 64 36
TEMP 74 72 66 59 57 64 65 59 50 46 43 47 58 62 64 58 47 41 36 40
DEWPT 51 55 54 41 36 30 24 24 23 26 27 29 32 29 22 22 21 20 21 21
MIN/MAX RH 64 21 54 20 53
RH 44 55 65 51 45 28 21 26 34 45 53 49 37 28 20 25 35 42 54 46
WIND DIR SW SW NW NW N NW NW NW NW W W W NW NW NW N N N NE NE
WIND SPD 6 5 8 14 10 13 12 6 3 3 3 5 9 10 11 6 5 3 3 3
WIND GUST 25 21
CLOUDS SC B1 B2 OV OV B1 FW FW FW CL CL SC SC FW FW FW CL CL CL CL
CLOUDS(%) 42 59 77 97 96 68 18 7 6 3 4 29 26 21 9 7 3 4 4 5
VSBY 10 10 10 10 10 10 10 10 10 10 10 10 10 10 10 10 10 10 10
POP 12HR 20 20 0 0 0
RAIN SHWRS IS
MIX HGT <1 <1 <1 2 3 6 6 <1 <1 <1 <1 <1 6 7 8 <1
T WIND DIR SW SW W NW NW NW NW NW NW SW SW SW W NW NW N
T WIND SPD 6 9 10 29 14 21 20 12 3 3 4 5 16 10 17 11
DISPERSION PR PR PR PR VP VP VP PR PR VP VP
ADI 5 6 9 60 47 95 95 6 2 2 2 6112 78 86 5
MAX LVORI 2 2 3 1 1 1 1 2 2 2 2 2 1 1 1 2
STABILITY E E D D C C C F G G G A B B C F
CEILING None 4100 4100 None None None None None None
STA PRES 29.09 29.11 29.29 29.32 29.43 29.45 29.46 29.45
Date 04/21Wed 04/22/26Thu 04/23/26Fri 04/24/26Sat 04/25/26
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 67 48 82 53 82 56 86 60 85
TEMP 63 64 54 53 79 74 59 57 80 76 62 59 84 78 65 63 82 76
DEWPT 25 30 31 34 39 39 46 48 48 47 48 49 47 47 49 52 52 52
RH 23 28 41 48 24 28 62 72 33 36 60 69 28 33 56 67 35 43
WIND SPD <15 <15 <15 <15 <15 <15 <15 <15 <15
AVG CLOUDS FW FW SC SC SC SC SC FW FW FW SC FW FW SC SC SC B1 B1
POP 12HR 0 0 10 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
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