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EXPERIMENTAL...FIRE WEATHER POINT FORECAST MATRICES
NATIONAL WEATHER SERVICE Blacksburg VA
402 AM EDT Wed Mar 18 2026
NCZ006-182000-
RAWS 310801
36.37N 79.29W Elev. 580 ft
402 AM EDT Wed Mar 18 2026
Date Wed 03/18/26 Thu 03/19/26 Fri 03/20/26
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 48 30 62 42 69
TEMP 29 28 36 43 47 40 35 33 32 33 47 58 62 55 48 46 43 44 57 66 68 62
DEWPT 14 13 13 13 12 18 19 20 21 23 26 31 33 35 36 37 38 41 44 43 42 44
MAX/MIN RH 24 65 33 91 38
RH 53 53 38 29 24 41 52 58 63 66 43 36 33 47 63 71 82 89 62 43 39 52
WIND DIR N NE E SE S N S S S S SW SW SW S S SW W W NW SW SW S
WIND SPD 2 2 2 2 1 0 1 1 1 1 2 3 3 1 2 2 1 1 2 4 4 2
CLOUDS B2 B1 CL SC SC SC SC B1 FW SC B1 B1 B1 B2 B1 B1 SC SC SC SC B1 B1
CLOUDS(%) 83 55 5 30 48 39 34 55 25 32 60 55 60 81 65 54 30 26 39 45 55 69
VSBY 10 10 10 10 10 10 10 10 10 10 10 10 10 10 10 10 10 10 10 10 10 10
POP 12HR 0 5 0 5 5
RAIN SHWRS IS
MIX HGT 2 3 4 5 5 <1 <1 <1 <1 <1 2 4 5 <1 <1 <1 <1 <1 2 4 5 <1
T WIND DIR N NE NE S SW S S S S S W SW SW S S S SW SW W SW SW S
T WIND SPD 13 9 4 3 4 8 4 4 3 4 10 5 9 5 3 3 3 2 2 5 11 6
DISPERSION VP VP VP VP VP VP VP VP VP VP
ADI 6 29 21 20 29 4 2 2 2 4 31 27 52 3 2 2 2 2 7 30 35 3
MAX LVORI 2 2 2 2 2 2 2 3 3 3 1 2 1 2 3 3 5 6 3 1 1 2
STABILITY F B B B A G G F G A B B B F F F G A B B D F
CEILING None None None None None 14400 4700 None None 4000
STA PRES 29.73 29.65 29.64 29.59 29.57 29.47 29.48 29.47 29.48 29.37
Date Sat 03/21/26Sun 03/22/26Mon 03/23/26Tue 03/24/26
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 49 76 52 81 52 71 39 55
TEMP 54 51 73 68 57 54 79 74 61 54 67 60 45 40 50 49
DEWPT 44 47 52 51 49 50 54 52 51 46 42 37 31 29 32 34
RH 69 86 48 54 75 86 42 46 70 74 40 42 58 64 50 56
WIND SPD <15 <15 <15 <15 <15 <15 <15 <15
AVG CLOUDS B1 B1 B1 SC SC SC SC SC SC B1 B1 B1 B1 B2 B2 B2
POP 12HR 20 5 5 10 20 20 20 30
RAIN SHWRS IS IS IS IS IS IS IS IS IS SC
SNOWSHWRS IS IS
TSTMS 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