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EXPERIMENTAL...FIRE WEATHER POINT FORECAST MATRICES
NATIONAL WEATHER SERVICE Blacksburg VA
231 AM EDT Mon Jul 20 2026
NCZ006-210800-
RAWS 310801
36.37N 79.29W Elev. 580 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 70 85 70 91 72
TEMP 71 72 78 84 83 78 73 73 72 74 83 88 88 85 80 78 75 73
DEWPT 71 72 74 74 74 74 73 73 71 73 76 75 75 74 73 72 72 73
MIN/MAX RH 100 72 100 63 100
RH 100100 88 72 74 88100100 97 97 80 66 66 70 79 82 90100
WIND DIR N N NE NE E SE S S S SW SW SW SW SW SW SW SW SW
WIND SPD 0 1 2 3 3 1 1 1 3 5 9 11 11 9 8 8 9 9
WIND GUST 19 23 23 19 18 18 19
CLOUDS B2 B1 B2 B1 B2 B2 B1 B1 B2 SC B1 B2 B2 B1 B2 B2 B2 OV
CLOUDS(%) 70 66 77 66 73 73 66 67 70 33 55 74 77 65 72 87 87 95
VSBY 5 4 10 10 10 10 10 10 10 10 10 10 10 10 10 10 10 10
POP 12HR 70 60 60 40 80
RAIN SHWRS SC NM NM SC SC IS SC SC SC O O O
TSTMS SC SC SC SC IS IS SC SC SC SC IS IS
Obvis PF PF PF
MIX HGT <1 1 2 3 3 <1 <1 <1 <1 1 3 5 4 <1 <1 <1 <1 1
T WIND DIR N NE NE N SE SE SW SE S SW SW W W W S SW SW SW
T WIND SPD 4 5 3 0 5 4 5 2 4 16 20 24 11 6 4 10 8 11
DISPERSION VP VP VP VP VP PR PR PR PR
ADI 2 8 9 0 19 2 3 1 2 26 70 76 30 6 4 9 7 19
MAX LVORI 9 8 5 4 3 5 8 10 9 4 3 1 3 3 4 4 5 5
STABILITY F B B B B F F F F A C D D D D D D C
CEILING 2100 600 3000 4100 None 8500 4100 4400 4400
STA PRES 29.28 29.31 29.27 29.28 29.24 29.26 29.23 29.19 29.21
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 86 65 79 63 82 64 80 65 86
TEMP 83 81 71 66 77 76 67 66 79 78 68 67 78 77 68 68 83 81
DEWPT 76 74 68 66 67 67 66 65 67 67 66 67 68 68 66 68 69 70
RH 80 79 90100 71 74 97 97 67 69 93100 71 74 93100 63 69
WIND SPD <15 <15 <15 <15 <15 <15 <15 <15 <15
AVG CLOUDS OV OV B2 B2 B1 B1 B1 B1 B1 B1 B1 B2 B2 B2 B1 SC SC SC
POP 12HR 90 70 30 30 20 30 30 20 20
RAIN SHWRS O O NM NM SC SC SC SC IS IS IS SC SC IS IS IS IS IS
TSTMS SC SC SC SC 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
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