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EXPERIMENTAL...FIRE WEATHER POINT FORECAST MATRICES
NATIONAL WEATHER SERVICE Blacksburg VA
801 AM EDT Sat Mar 21 2026
NCZ006-212000-
RAWS 310801
36.37N 79.29W Elev. 580 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 77 55 86 64 75
TEMP 70 77 77 69 62 58 56 56 73 84 86 79 73 69 67 64 70 73 70 60
DEWPT 52 49 45 47 48 49 53 54 59 56 53 55 54 54 54 55 52 44 36 32
MAX/MIN RH 32 92 33 72 28
RH 53 37 32 45 60 72 90 93 62 38 32 44 51 59 63 73 53 35 29 35
WIND DIR NW NW NW SE SE S SW SW SW SW SW SW SW SW SW W NW N N N
WIND SPD 4 4 2 1 1 2 2 2 3 6 6 3 5 5 5 5 8 10 10 5
WIND GUST 18 16
CLOUDS B1 B1 B1 SC FW FW SC SC FW FW SC SC FW SC B1 B1 SC SC FW FW
CLOUDS(%) 59 69 56 34 19 24 33 39 21 15 28 40 21 28 54 56 40 32 14 7
VSBY 10 10 10 10 10 10 10 10 10 10 10 10 10 10 10 7 7 10 10 10
POP 12HR 5 10 0 10 20
RAIN SHWRS IS IS
MIX HGT 3 5 5 <1 <1 <1 <1 <1 2 5 6 <1 <1 <1 <1 <1 4 6 5 <1
T WIND DIR N NW SW S S SE S S W SW SW SW SW SW SW NW NW N N N
T WIND SPD 11 3 3 2 3 4 5 4 11 16 20 9 11 14 12 14 27 23 23 19
DISPERSION VP VP VP VP VP PR PR PR PR
ADI 27 11 14 1 2 2 3 5 26 90134 4 5 7 8 18128100 94 9
MAX LVORI 2 2 2 2 3 5 6 6 2 1 1 2 2 3 3 3 1 1 1 2
STABILITY D D C G G G G B B B B G F F E D B C C F
CEILING 0 None None None None None None None None None
STA PRES 29.28 29.25 29.26 29.23 29.22 29.11 29.06 29.05 29.30 29.46
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 40 60 41 66 46 73 56 77
TEMP 47 40 57 54 46 43 63 61 52 49 70 68 61 58 73 67
DEWPT 29 28 26 26 28 35 41 41 42 44 47 52 54 54 51 43
RH 49 62 30 34 49 73 44 48 69 83 44 57 78 86 46 42
WIND SPD <15 <15 <15 <15 <15 <15 <15 <15
AVG CLOUDS FW SC SC SC SC B1 SC B2 B1 B1 B1 B1 B1 B1 B1 B1
POP 12HR 5 5 20 20 20 20 20 30
RAIN SHWRS IS IS IS IS IS IS IS IS IS 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