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EXPERIMENTAL...FIRE WEATHER POINT FORECAST MATRICES
NATIONAL WEATHER SERVICE Blacksburg VA
801 AM EDT Mon Sep 21 2026
NCZ005-212000-
RAWS 310540
36.38N 79.70W Elev. 858 ft
801 AM EDT Mon Sep 21 2026
Date Mon 09/21/26 Tue 09/22/26 Wed 09/23/26
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 89 67 80 58 65
TEMP 80 86 87 80 75 72 70 68 75 79 76 70 66 65 62 59 63 63 63 62
DEWPT 70 69 70 71 70 70 69 68 71 72 70 68 66 65 62 59 63 63 63 62
MAX/MIN RH 56 100 78 100 99
RH 72 57 57 74 84 93 97100 87 79 82 93100100100100100100100100
WIND DIR NE E E NE E NE NE NE E NE NE NE NE NE NE NE NE NE NE NE
WIND SPD 3 2 2 3 3 2 2 3 3 5 8 10 8 8 10 11 11 12 12 11
WIND GUST 21 23 23
CLOUDS FW B1 B1 B2 OV OV OV B2 OV B2 OV OV OV B2 OV B2 OV B2 B2 B2
CLOUDS(%) 23 59 64 85 88 91 90 84 90 87 91 92 92 87 89 83 89 84 81 86
VSBY 10 10 10 7 5 5 4 5 8 3 3 3 3 6 6 6 6 6 6 10
POP 12HR 40 70 80 90 70
RAIN D D L L L L L L L
RAIN SHWRS IS SC NM NM SC SC SC SC O NM
TSTMS IS SC SC IS IS SC SC
Obvis PF PF
MIX HGT 2 4 3 <1 <1 <1 1 <1 1 2 2 1 1 1 1 2 2 2 2 1
T WIND DIR N S E NE NE N E NE NE NE NE N N N NE N N N N N
T WIND SPD 0 2 8 11 10 3 8 4 6 4 12 14 12 13 14 14 17 19 17 18
DISPERSION VP VP VP VP FR PR PR FR FR
ADI 0 9 28 5 5 2 4 4 12 9 22 17 14 15 17 25 31 40 35 16
MAX LVORI 4 2 2 4 5 7 8 9 5 4 3 5 5 5 5 4 4 4 4 5
STABILITY B C C F F F F C C D D D D D D D D D D D
CEILING None 2900 400 400 400 3100 500 500 500 500
STA PRES 29.25 29.21 29.28 29.29 29.32 29.32 29.38 29.39 29.46 29.47
Date Thu 09/24/26Fri 09/25/26Sat 09/26/26Sun 09/27/26
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 54 63 51 69 49 73 50 74
TEMP 60 55 62 58 54 52 67 63 53 51 71 65 54 51 73 66
DEWPT 60 55 61 58 54 51 55 54 49 47 51 52 49 49 53 56
RH 100100 97100100 96 65 72 86 86 49 63 83 93 49 70
WIND SPD <15 <15 <15 <15 <15 <15 <15 <15
AVG CLOUDS B2 B2 B2 B2 B1 SC FW FW FW FW FW FW FW SC FW SC
POP 12HR 70 40 5 5 5 5 0 5
RAIN L L C
RAIN SHWRS 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