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EXPERIMENTAL...FIRE WEATHER POINT FORECAST MATRICES
NATIONAL WEATHER SERVICE Blacksburg VA
801 PM EDT Sat Mar 21 2026
NCZ006-220800-
RAWS 310801
36.37N 79.29W Elev. 580 ft
801 PM EDT Sat Mar 21 2026
Date 03/21/26 Sun 03/22/26 Mon 03/23/26 Tue
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 54 87 63 76 39
TEMP 62 59 56 56 74 85 87 77 71 67 66 64 73 75 74 62 54 47 42 40
DEWPT 48 51 53 54 59 56 54 54 55 55 55 55 55 48 40 35 33 31 30 28
MIN/MAX RH 94 32 74 29 63
RH 60 75 90 93 59 37 32 45 57 65 68 73 53 38 29 36 45 53 62 62
WIND DIR S S SW SW W SW SW SW SW SW SW W N N N N N N NE NE
WIND SPD 3 3 3 2 5 8 10 5 6 5 5 4 10 11 11 9 8 4 5 3
WIND GUST 16 16 14
CLOUDS CL FW FW SC FW FW FW SC FW FW B1 B1 SC SC FW SC SC SC SC SC
CLOUDS(%) 0 18 19 49 12 11 19 30 9 17 56 68 44 27 17 32 35 33 41 41
VSBY 10 10 10 10 10 10 10 10 10 10 10 10 10 10 10 10
POP 12HR 20 0 0 10 0
RAIN SHWRS IS
MIX HGT <1 <1 <1 <1 2 5 6 <1 <1 <1 <1 <1 5 5 5 <1
T WIND DIR S S SW W W SW SW SW SW SW SW W N N NE NE
T WIND SPD 3 3 3 4 9 16 20 8 8 9 8 6 19 14 11 11
DISPERSION VP VP VP PR PR PR PR PR PR VP PR
ADI 2 2 2 5 20 93 94 4 4 4 5 8 78 61 47 8
MAX LVORI 3 3 7 6 2 1 1 2 3 3 3 3 1 1 1 2
STABILITY G G G B B B C F F F E B C C C E
CEILING None None None None None None None None None
STA PRES 29.23 29.21 29.23 29.14 29.14 29.13 29.25 29.41
Date 03/24Wed 03/25/26Thu 03/26/26Fri 03/27/26Sat 03/28/26
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 60 40 66 48 74 56 77 43 61
TEMP 56 54 44 42 63 60 52 50 71 69 61 58 74 65 49 43 57 54
DEWPT 25 26 28 32 39 40 43 47 51 53 53 51 51 45 40 36 34 33
RH 30 34 53 67 41 47 71 89 49 57 75 77 44 48 71 76 42 45
WIND SPD <15 <15 <15 <15 <15 <15 <15 <15 <15
AVG CLOUDS SC SC SC B2 B1 B2 B2 B1 B1 B1 SC B1 B2 B1 B1 B2 B1 B1
POP 12HR 0 5 10 20 20 20 20 40 30
RAIN SHWRS IS IS IS IS IS SC SC SC 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