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EXPERIMENTAL...FIRE WEATHER POINT FORECAST MATRICES
NATIONAL WEATHER SERVICE Blacksburg VA
131 AM EDT Mon Sep 21 2026
VAZ024-220800-
RAWS 441631
37.63N 79.51W Elev. 865 ft
131 AM EDT Mon Sep 21 2026
Date 09/20/26 Mon 09/21/26 Tue 09/22/26 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 66 82 64 75 55
TEMP 70 68 68 76 80 81 75 71 68 67 65 71 73 72 66 63 61 58 56
DEWPT 67 66 66 69 69 70 69 67 67 66 65 70 69 68 66 63 61 58 56
MIN/MAX RH 94 68 100 85 100
RH 90 93 93 79 69 69 82 87 97 97100 97 87 87100100100100100
WIND DIR N N NE E SE SE E NE NE NE N E NE NE NE NE NE NE NE
WIND SPD 0 0 1 2 3 2 2 2 1 1 1 2 3 4 5 5 4 5 5
WIND GUST 17 19 20 21 21
CLOUDS SC B1 B2 B2 B2 B2 B2 OV OV B2 B2 OV B2 OV OV OV B2 B2 B2
CLOUDS(%) 28 52 77 78 75 74 84 89 97 87 84 88 83 94 96 90 85 78 86
VSBY 8 2 2 9 9 9 5 3 2 2 3 4 3 3 6 6 3 3 6
POP 12HR 5 50 90 90 80
RAIN D D L L D
RAIN SHWRS SC SC O NM O SC SC NM NM NM
TSTMS IS SC SC IS IS
Obvis PF PF
MIX HGT <1 <1 <1 2 3 2 <1 <1 <1 <1 <1 1 2 2 1
T WIND DIR NW N N E E E NE NE NE NE N NE NE NE NE
T WIND SPD 2 2 3 5 6 10 10 8 5 6 9 9 12 13 12
DISPERSION VP VP VP VP VP VP PR PR VP PR
ADI 1 1 3 13 20 22 5 7 3 3 7 15 25 24 14
MAX LVORI 7 8 9 4 3 3 5 6 6 8 6 4 3 4 5
STABILITY G G A C C C F D F F C C D D D
CEILING 12400 1300 1700 300 300 1100 1800 1100
STA PRES 28.46 28.51 28.50 28.57 28.57 28.60 28.62
Date 09/23Thu 09/24/26Fri 09/25/26Sat 09/26/26Sun 09/27/26
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 65 52 66 48 71 47 75 48 77
TEMP 63 59 56 52 63 59 52 49 69 61 51 48 72 63 53 49 74 65
DEWPT 61 59 56 52 57 55 51 48 51 50 47 45 50 51 49 48 54 55
RH 93100100100 81 87 96 96 53 67 86 89 46 65 86 96 50 70
WIND SPD <15 <15 <15 <15 <15 <15 <15 <15 <15
AVG CLOUDS B2 B2 OV B2 B2 B2 B1 SC SC SC SC FW FW FW SC SC FW SC
POP 12HR 80 70 30 5 5 5 5 0 0
RAIN D D L C
RAIN SHWRS 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