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EXPERIMENTAL...FIRE WEATHER POINT FORECAST MATRICES
NATIONAL WEATHER SERVICE Blacksburg VA
801 AM EDT Thu Apr 23 2026
VAZ046-232000-
RAWS 441101
37.39N 78.80W Elev. 804 ft
801 AM EDT Thu Apr 23 2026
Date Thu 04/23/26 Fri 04/24/26 Sat 04/25/26
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 84 56 86 57 81
TEMP 76 82 83 76 65 60 56 61 80 85 84 75 67 62 58 61 74 78 78 70
DEWPT 49 49 49 51 51 52 51 52 51 48 48 49 51 52 52 53 57 58 57 56
MAX/MIN RH 30 83 27 82 49
RH 39 32 31 42 60 75 83 72 36 28 29 40 56 70 80 75 55 50 48 61
WIND DIR W NW NW W NW SW W W W W W SW SW W W W W W W NW
WIND SPD 5 5 5 3 2 2 2 3 4 5 5 3 3 3 3 3 5 6 6 4
CLOUDS CL FW SC SC FW FW FW FW FW SC SC FW FW FW SC B1 B1 B2 B2 B1
CLOUDS(%) 2 24 40 30 14 7 16 11 25 33 33 25 22 22 30 57 57 83 83 67
VSBY 10 10 10 10 10 10 10 10 10 10 10 10
POP 12HR 10 10 20 10 70
RAIN SHWRS IS SC SC NM NM SC
TSTMS SC SC
MIX HGT 4 9 8 <1 <1 <1 <1 <1 6 9 7 <1 <1 <1 <1 <1 5 6 4 <1
T WIND DIR NW NW NW W W W W W NW W W W SW W W W SW W W W
T WIND SPD 17 12 10 3 3 3 3 2 14 12 11 3 2 3 2 1 6 14 14 9
DISPERSION VP VP VP VP VP VP VP VP VP
ADI 97132 97 2 2 2 2 2117128 97 2 1 2 1 1 38 65 65 6
MAX LVORI 1 1 1 2 3 4 5 3 1 1 1 2 3 3 5 4 1 1 1 3
STABILITY A A A G G G G A A A A G G G G A B C B E
CEILING None None None None None None None None 13700 10200
STA PRES 29.29 29.22 29.21 29.19 29.17 29.09 29.10 29.08 29.08 29.05
Date Sun 04/26/26Mon 04/27/26Tue 04/28/26Wed 04/29/26
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 52 72 48 73 53 72 52 77
TEMP 59 53 69 65 52 49 69 67 57 55 67 68 59 56 74 69
DEWPT 55 50 49 46 46 45 46 47 49 51 58 55 53 51 50 48
RH 87 89 49 50 80 86 44 49 75 86 73 63 80 83 43 47
WIND SPD <15 <15 <15 <15 <15 <15 <15 <15
AVG CLOUDS B1 B1 SC SC FW SC SC SC SC B2 B2 B2 SC SC SC SC
POP 12HR 50 20 10 20 60 80 30 20
RAIN SHWRS SC SC IS IS IS NM O SC 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