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EXPERIMENTAL...FIRE WEATHER POINT FORECAST MATRICES
NATIONAL WEATHER SERVICE Blacksburg VA
1001 PM EDT Tue Jul 21 2026
WVZ043-220800-
RAWS 465401
37.53N 81.00W Elev. 2725 ft
1001 PM EDT Tue Jul 21 2026
Date 07/21/26 Wed 07/22/26 Thu 07/23/26 Fri
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 66 77 59 74 58
TEMP 72 69 68 68 71 75 75 70 65 62 59 60 67 72 73 69 63 61 59 60
DEWPT 70 69 68 68 69 68 67 64 62 61 59 59 61 62 62 61 60 60 58 59
MIN/MAX RH 100 75 98 69 98
RH 93100100100 93 79 76 81 90 97100 96 81 71 68 76 90 97 96 96
WIND DIR SW W W W W W NW N N N N N E E E E SE SE E E
WIND SPD 9 9 5 4 6 8 6 5 4 3 2 2 3 3 4 4 3 3 3 4
WIND GUST 21 21
CLOUDS B2 B2 B1 B2 B1 B1 B1 SC B1 B2 B2 SC B1 B1 B1 SC SC B1 B1 B2
CLOUDS(%) 76 78 67 75 69 58 61 41 66 83 75 48 59 62 52 37 36 55 65 78
VSBY 7 5 6 5 10 10 10 10 10 7 10 10 10 7 7 10 10 10 10
POP 12HR 90 40 10 30 10
RAIN SHWRS NM NM SC IS SC SC SC SC SC IS
TSTMS NM IS IS IS IS SC
MIX HGT <1 <1 <1 1 3 4 4 1 <1 <1 <1 1 3 4 4 1
T WIND DIR W W W W W W W NW N N N N SE S SE SE
T WIND SPD 8 14 10 11 9 10 8 3 11 8 8 5 2 3 2 8
DISPERSION PR PR PR PR VP VP VP VP VP VP VP
ADI 7 13 7 20 28 39 30 2 5 4 4 7 9 18 8 4
MAX LVORI 6 5 8 5 4 3 3 5 6 8 9 6 4 3 3 4
STABILITY D D E C C C C E F F F A B B C F
CEILING 700 None None 1700 2200 None None None
STA PRES 27.50 27.58 27.57 27.61 27.67 27.73 27.73
Date 07/24Sat 07/25/26Sun 07/26/26Mon 07/27/26Tue 07/28/26
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 73 61 72 63 79 66 81 66 80
TEMP 71 70 64 62 70 69 64 65 77 75 67 68 78 76 68 67 78 75
DEWPT 63 62 63 62 68 66 64 65 68 68 67 67 69 68 66 66 66 65
RH 76 76 97100 93 90100100 74 79100 97 74 76 93 97 67 71
WIND SPD <15 <15 <15 <15 <15 <15 <15 <15 <15
AVG CLOUDS B2 B2 B1 B2 B2 B2 B1 B1 B1 B1 B1 B1 B1 B1 B1 B1 B1 B1
POP 12HR 20 50 60 30 30 30 50 50 40
RAIN SHWRS IS IS SC SC NM NM SC SC SC SC SC IS IS SC SC SC SC SC
TSTMS IS IS SC IS SC IS IS SC IS SC
$$
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