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EXPERIMENTAL...FIRE WEATHER POINT FORECAST MATRICES
NATIONAL WEATHER SERVICE Blacksburg VA
801 AM EDT Sat Mar 21 2026
VAZ046-212000-
RAWS 441101
37.39N 78.80W Elev. 804 ft
801 AM EDT Sat Mar 21 2026
Date Sat 03/21/26 Sun 03/22/26 Mon 03/23/26
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 74 52 85 60 70
TEMP 66 73 74 66 59 55 52 53 70 82 85 78 72 69 66 61 65 67 65 55
DEWPT 52 49 48 47 46 50 49 49 56 56 53 53 53 54 54 54 49 39 33 29
MAX/MIN RH 39 89 34 76 31
RH 61 43 40 50 62 83 89 86 61 41 33 42 51 59 65 78 56 36 30 37
WIND DIR N NE S SE SE S S SW SW SW SW SW SW SW SW NW N N N N
WIND SPD 4 3 3 3 3 3 3 4 6 9 10 6 9 9 9 9 10 10 11 8
WIND GUST 20 18 20 19 19 20 21 20 21 19
CLOUDS FW FW SC FW FW FW SC SC SC FW SC SC SC B1 B2 B2 SC FW CL CL
CLOUDS(%) 22 19 29 22 23 14 40 50 35 22 27 37 38 51 70 74 43 15 3 5
VSBY 10 10 10 10 10 10 10 10 10 10 10 10 10 7 7 7 7 10 10 10
POP 12HR 5 5 0 20 20
RAIN SHWRS IS IS IS IS
MIX HGT 3 5 6 <1 <1 <1 <1 <1 2 4 6 <1 <1 <1 <1 1 3 6 5 <1
T WIND DIR N N S E SE SE S S W SW SW SW SW SW SW N NW NW NW N
T WIND SPD 6 0 4 10 9 8 5 6 13 16 23 14 16 13 10 12 23 20 20 21
DISPERSION VP VP VP VP PR PR PR PR PR
ADI 24 0 29 5 4 4 3 7 29 57100 7 11 12 9 16 75 90 88 15
MAX LVORI 2 2 2 2 3 4 6 5 2 1 1 2 2 2 3 3 1 1 1 2
STABILITY B B B G G G G B B C C F E D D D C C C E
CEILING None None None None None None None 0 None None
STA PRES 29.21 29.17 29.19 29.16 29.12 29.00 28.94 28.94 29.24 29.41
Date Tue 03/24/26Wed 03/25/26Thu 03/26/26Fri 03/27/26
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 37 56 39 63 44 71 55 72
TEMP 43 37 53 50 43 41 62 58 51 47 67 66 60 57 70 63
DEWPT 26 24 23 24 27 31 37 38 39 39 45 49 50 49 46 40
RH 51 59 31 36 53 67 39 47 63 74 45 54 69 75 42 43
WIND SPD <15 <15 <15 <15 <15 <15 <15 <15
AVG CLOUDS FW FW SC SC B1 B1 SC B1 SC SC B1 B1 B1 B1 B1 B1
POP 12HR 5 0 10 20 20 20 30 30
RAIN SHWRS IS IS IS IS IS 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