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EXPERIMENTAL...FIRE WEATHER POINT FORECAST MATRICES
NATIONAL WEATHER SERVICE Blacksburg VA
901 PM EDT Fri Mar 20 2026
NCZ005-210800-
RAWS 310540
36.38N 79.70W Elev. 858 ft
901 PM EDT Fri Mar 20 2026
Date 03/20/26 Sat 03/21/26 Sun 03/22/26 Mon
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 53 77 53 85 61
TEMP 62 59 56 55 68 75 77 70 61 58 55 54 70 82 85 77 72 69 66 62
DEWPT 40 42 45 49 53 51 47 48 49 51 53 52 56 55 51 53 53 54 54 52
MIN/MAX RH 79 35 97 31 71
RH 44 53 66 80 59 43 35 45 65 77 93 93 61 40 31 43 51 59 65 70
WIND DIR SW SW W W NW NW NW SW SW SW SW W SW SW SW SW SW SW W W
WIND SPD 10 9 6 5 5 4 3 2 2 2 2 2 4 8 9 4 5 6 8 8
CLOUDS SC B1 B2 B1 B2 B2 SC FW FW SC SC SC FW FW SC SC SC SC B1 B1
CLOUDS(%) 41 52 73 57 71 77 50 18 13 31 33 38 18 22 35 32 40 48 53 57
VSBY 10 10 10 10 10 10 10 10 10 10 10 10 10 10 10 10 10 10 10
POP 12HR 20 5 10 0 5
MIX HGT <1 <1 <1 <1 2 5 5 <1 <1 <1 <1 <1 1 5 6 <1
T WIND DIR SW SW SW SW W NW NW S S SW SW SW SW SW SW SW
T WIND SPD 10 9 8 5 9 10 4 2 2 2 2 1 4 12 18 11
DISPERSION FR PR PR VP VP VP VP VP PR PR PR
ADI 9 8 5 4 26 42 29 1 1 1 1 1 8 70 82 5
MAX LVORI 2 2 3 4 2 1 2 2 3 4 7 7 3 1 1 2
STABILITY D D E C C C B G G G G B B B C F
CEILING 8900 9700 None None None None None None
STA PRES 29.14 29.18 29.15 29.18 29.17 29.17 29.06
Date 03/23Tue 03/24/26Wed 03/25/26Thu 03/26/26Fri 03/27/26
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 76 42 59 42 64 43 71 53 74
TEMP 73 65 50 42 57 54 47 44 61 57 48 45 66 66 60 56 71 63
DEWPT 45 33 29 25 22 26 28 33 35 35 35 37 39 43 47 48 44 43
RH 37 30 44 50 25 34 47 65 38 43 60 73 37 43 62 74 38 48
WIND SPD <15 <15 <15 <15 <15 <15 <15 <15 <15
AVG CLOUDS SC FW FW FW SC B1 B2 B1 B1 B1 SC SC SC SC FW SC B1 B1
POP 12HR 10 10 0 10 20 20 10 10 40
RAIN SHWRS 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