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EXPERIMENTAL...FIRE WEATHER POINT FORECAST MATRICES
NATIONAL WEATHER SERVICE Blacksburg VA
301 PM EDT Thu Apr 23 2026
NCZ001-240800-
RAWS 310142
36.40N 81.46W Elev. 4608 ft
301 PM EDT Thu Apr 23 2026
Date 04/23/26 Fri 04/24/26 Sat 04/25/26 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 52 69 54 64 48
TEMP 69 63 57 56 55 56 64 67 66 61 57 56 55 57 60 62 59 56 54 52 50 49
DEWPT 34 39 39 40 41 43 42 43 44 45 46 46 47 49 51 53 53 51 50 48 47 46
MIN/MAX RH 64 42 75 71 91
RH 27 41 51 55 59 62 45 42 45 56 67 69 74 75 72 72 80 83 86 86 89 89
WIND DIR W W W W W W W W W W W W W W W W NW NW NW NW NW NW
WIND SPD 8 8 8 9 10 10 10 6 8 8 9 10 10 11 11 10 10 10 11 12 12 13
CLOUDS FW FW FW SC FW FW FW B1 SC FW FW SC SC B2 B2 OV OV B1 B1 SC SC SC
CLOUDS(%) 12 8 8 27 13 13 11 59 46 16 21 38 45 71 71 94 94 69 58 43 41 31
VSBY 10 10 10 10 10 10 10 10 10 10 10 10 10
POP 12HR 0 10 20 90 50
RAIN SHWRS IS IS SC SC NM O SC SC
TSTMS IS SC IS
MIX HGT 7 <1 <1 <1 <1 <1 7 6 5 <1 <1 <1 <1 <1 2 2 2 <1
T WIND DIR W W NW NW NW NW W SW W W W W W NW NW NW NW NW
T WIND SPD 8 4 3 4 4 3 6 5 6 3 3 5 8 6 13 13 9 12
DISPERSION PR PR PR FR PR PR FR FR FR FR FR FR
ADI 61 3 2 3 3 4 50 25 41 2 2 4 7 8 23 35 20 11
MAX LVORI 1 2 2 3 3 3 1 2 1 3 3 3 4 3 3 3 3 4
STABILITY B E E E E B B C B E E E D D D C C D
CEILING None None None None None None 1800 600 None
STA PRES 26.67 26.64 26.64 26.58 26.57 26.56 26.58 26.58
Date 04/26Mon 04/27/26Tue 04/28/26Wed 04/29/26Thu 04/30/26
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 65 45 61 50 65 51 64 48 62
TEMP 65 61 50 46 58 57 52 51 59 60 56 54 61 59 52 51 59 57
DEWPT 43 44 43 42 45 44 44 47 53 52 51 50 46 44 43 44 42 40
RH 45 53 77 86 62 62 74 86 80 75 83 86 58 57 71 77 53 53
WIND SPD <15 <15 <15 <15 <15 <15 <15 <15 <15
AVG CLOUDS FW SC SC B1 SC B1 B1 B2 B2 B1 SC B1 B1 B1 SC B1 B1 B1
POP 12HR 20 20 20 60 80 30 40 30 50
RAIN SHWRS IS IS IS IS IS IS NM O SC IS SC SC SC IS SC SC SC
TSTMS IS SC IS 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