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EXPERIMENTAL...FIRE WEATHER POINT FORECAST MATRICES
NATIONAL WEATHER SERVICE Blacksburg VA
231 AM EDT Mon Jul 20 2026
VAZ024-210800-
RAWS 441631
37.63N 79.51W Elev. 865 ft
231 AM EDT Mon Jul 20 2026
Date 07/19/26 Mon 07/20/26 Tue 07/21/26 Wed
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 69 83 68 90 68
TEMP 70 71 78 81 83 78 73 71 71 73 83 89 87 80 74 71 69 71
DEWPT 66 65 66 68 70 71 70 70 70 71 74 74 74 73 72 71 69 71
MIN/MAX RH 86 62 99 62 100
RH 87 81 67 65 65 79 90 97 97 93 74 61 65 79 93100100100
WIND DIR N N E SE SE S N N SW SW SW SW SW SW SW SW SW SW
WIND SPD 0 0 1 3 3 2 0 0 1 2 5 6 6 5 4 4 3 3
WIND GUST 16 18 18 20 18 17 14 14
CLOUDS B1 B1 SC SC B1 B1 B1 B1 B1 SC B1 B2 B1 OV OV OV OV B1
CLOUDS(%) 60 51 44 36 52 66 59 51 57 42 60 82 61 88 88 92 92 56
VSBY 7 9 10 10 10 10 10 5 4 5 10 10 10 4 2 8 10 10
POP 12HR 10 40 70 70 90
RAIN SHWRS IS SC SC SC SC SC SC SC SC O O O O SC
TSTMS IS SC SC IS IS SC SC SC SC IS IS
Obvis PF PF
MIX HGT <1 1 3 4 4 <1 <1 <1 <1 <1 4 4 3 <1 <1 <1 <1 <1
T WIND DIR NE NE E S S SE S S S SW W SW SW SW SW SW SW SW
T WIND SPD 4 6 6 4 6 12 10 4 5 6 16 18 20 12 8 6 8 14
DISPERSION VP VP VP VP VP PR VP VP VP
ADI 2 9 25 26 30 6 5 2 3 8 57 70 71 8 5 5 4 20
MAX LVORI 6 5 3 2 1 4 7 9 9 8 3 1 1 4 6 9 9 5
STABILITY F B A A B F F F F A C C C E E E F B
CEILING None None None 2800 None 1100 2400 100 2100
STA PRES 28.46 28.49 28.43 28.40 28.37 28.38 28.35 28.32 28.32
Date 07/22Thu 07/23/26Fri 07/24/26Sat 07/25/26Sun 07/26/26
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 89 61 83 60 83 62 83 64 89
TEMP 87 81 65 63 81 76 64 63 80 76 66 65 81 76 66 67 87 81
DEWPT 69 67 62 60 62 63 61 61 63 64 62 63 66 66 64 65 67 69
RH 55 63 90 90 53 64 90 93 56 66 87 93 60 71 93 93 52 67
WIND SPD <15 <15 <15 <15 <15 <15 <15 <15 <15
AVG CLOUDS B1 SC FW FW SC SC FW SC B1 B1 B1 B1 B1 B1 SC SC SC SC
POP 12HR 30 10 10 10 20 30 20 20 20
RAIN SHWRS SC IS IS IS SC IS IS IS IS
TSTMS IS IS IS IS 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