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EXPERIMENTAL...FIRE WEATHER POINT FORECAST MATRICES
NATIONAL WEATHER SERVICE Blacksburg VA
131 AM EDT Fri Mar 20 2026
VAZ046-210800-
RAWS 441101
37.39N 78.80W Elev. 804 ft
131 AM EDT Fri Mar 20 2026
Date 03/19/26 Fri 03/20/26 Sat 03/21/26 Sun
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 38 69 51 75 51
TEMP 43 40 39 58 68 69 63 60 57 53 51 65 72 75 67 59 56 53 52
DEWPT 35 34 34 41 41 40 41 42 45 46 47 51 50 48 47 47 47 46 47
MIN/MAX RH 83 35 84 38 84
RH 73 79 82 53 37 35 44 51 64 77 86 60 46 38 49 64 72 77 83
WIND DIR S SW SW SW SW SW SW SW SW SW W N W SW S S S SW SW
WIND SPD 4 4 4 6 12 12 10 10 8 5 5 5 5 5 3 3 3 3 4
WIND GUST 23 23 20 20
CLOUDS FW FW FW FW SC B2 B2 B1 B1 B1 B1 B1 B1 SC FW FW SC SC SC
CLOUDS(%) 9 13 9 14 33 83 73 59 52 58 57 62 58 38 22 10 35 40 31
VSBY 10 10 10 10 10 10 10 10 10 10 10 10 10 10 10
POP 12HR 0 20 40 5 0
RAIN SHWRS SC SC
MIX HGT <1 <1 <1 1 5 4 <1 <1 <1 <1 <1 3 5 5 <1
T WIND DIR S SW SW SW SW SW SW SW SW SW W N NW SW SE
T WIND SPD 3 2 3 11 21 25 11 12 20 6 2 9 3 3 4
DISPERSION VP VP FR FR PR PR VP VP VP VP
ADI 2 1 4 21 88 71 10 11 19 5 2 29 14 20 2
MAX LVORI 3 5 5 2 1 1 2 2 2 4 5 2 2 2 2
STABILITY G G B B C D D D D E B C C B G
CEILING None None 12100 7300 None 17300 None None
STA PRES 29.44 29.40 29.24 29.15 29.12 29.20 29.17
Date 03/22Mon 03/23/26Tue 03/24/26Wed 03/25/26Thu 03/26/26
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 80 58 72 36 56 39 61 41 69
TEMP 78 71 64 59 68 60 43 37 54 50 44 41 59 56 47 45 65 65
DEWPT 54 52 51 50 41 29 24 22 22 24 28 32 35 35 36 37 44 44
RH 43 51 63 72 37 31 47 54 28 36 53 70 40 45 65 73 46 46
WIND SPD <15 <15 <15 <15 <15 <15 <15 <15 <15
AVG CLOUDS FW FW SC B1 B1 SC FW FW SC SC B1 B1 B1 B1 B1 B1 B1 SC
POP 12HR 0 10 20 10 5 10 10 10 10
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