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EXPERIMENTAL...FIRE WEATHER POINT FORECAST MATRICES
NATIONAL WEATHER SERVICE Blacksburg VA
231 PM EDT Wed Apr 22 2026
VAZ046-230800-
RAWS 441101
37.39N 78.80W Elev. 804 ft
231 PM EDT Wed Apr 22 2026
Date 04/22/26 Thu 04/23/26 Fri 04/24/26 Sat
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 53 84 56 86 56
TEMP 73 68 61 58 54 57 76 82 82 74 66 60 56 60 80 85 84 74 67 62 57 59
DEWPT 48 48 48 48 47 49 52 51 52 51 50 53 51 52 53 50 50 51 52 52 52 53
MIN/MAX RH 81 33 86 30 85
RH 41 49 62 69 77 75 43 34 35 44 56 78 83 75 39 30 31 44 59 70 83 80
WIND DIR W W W W W W W W W W NW W W W W W W SW S S NW N
WIND SPD 11 6 5 4 4 3 5 5 4 3 2 2 2 3 4 5 5 3 3 3 3 4
WIND GUST 21
CLOUDS SC FW CL FW FW FW FW FW SC FW FW FW FW FW FW SC SC SC SC SC SC SC
CLOUDS(%) 47 6 4 8 6 19 8 20 28 11 13 8 15 14 17 33 33 28 28 36 37 46
VSBY 10 10 10 10 10 10 10 10 10 10 10 10 10 10 10 10 10 10
POP 12HR 5 10 5 20 20
RAIN SHWRS IS IS IS IS IS IS IS IS
MIX HGT 4 <1 <1 <1 <1 <1 5 8 7 <1 <1 <1 <1 <1 8 10 8 <1
T WIND DIR W W W W SW W NW W W W W W W W NW W W W
T WIND SPD 19 6 3 3 3 2 11 11 11 2 3 3 3 2 12 11 11 2
DISPERSION PR PR VP VP VP VP VP VP VP VP VP VP
ADI 76 3 2 2 2 2 65105 98 1 2 2 2 2113125107 1
MAX LVORI 1 2 3 3 4 3 1 1 1 2 3 4 5 3 1 1 1 2
STABILITY C F F F F A A A A G G G G A A A A G
CEILING None None None None None None None None None None
STA PRES 29.32 29.31 29.32 29.32 29.23 29.24 29.22 29.21 29.13
Date 04/25Sun 04/26/26Mon 04/27/26Tue 04/28/26Wed 04/29/26
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 81 53 71 47 72 54 74 53 78
TEMP 78 71 58 54 68 65 53 50 69 66 58 55 67 69 59 56 75 70
DEWPT 57 55 53 49 49 46 44 44 45 46 48 52 58 55 53 53 53 49
RH 48 57 83 83 51 50 71 80 42 48 69 90 73 61 80 90 46 47
WIND SPD <15 <15 <15 <15 <15 <15 <15 <15 <15
AVG CLOUDS SC B2 B2 B2 B1 SC SC SC SC SC B1 B2 B2 B2 B1 SC B1 B1
POP 12HR 60 70 30 10 20 50 70 30 30
RAIN SHWRS IS NM NM SC SC IS IS IS SC NM SC SC IS IS SC
TSTMS 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