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EXPERIMENTAL...FIRE WEATHER POINT FORECAST MATRICES
NATIONAL WEATHER SERVICE Blacksburg VA
801 AM EDT Tue Apr 28 2026
VAZ046-282000-
RAWS 441101
37.39N 78.80W Elev. 804 ft
801 AM EDT Tue Apr 28 2026
Date Tue 04/28/26 Wed 04/29/26 Thu 04/30/26
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 68 52 69 50 69
TEMP 57 63 68 65 58 56 54 55 64 66 69 66 60 57 52 51 62 67 68 61
DEWPT 46 50 52 54 52 52 52 53 59 61 62 61 57 52 48 46 43 40 37 36
MAX/MIN RH 57 97 80 88 32
RH 67 62 57 68 80 86 93 93 84 84 78 84 90 83 86 83 50 37 32 39
WIND DIR SW SW SW S S S S S S S S W W W NW NW NW NW NW NW
WIND SPD 5 6 6 3 3 3 2 3 5 8 8 6 6 6 8 9 10 10 10 6
WIND GUST 17 17 19 20
CLOUDS B2 B2 B1 SC FW SC B1 B2 OV OV OV B1 B1 SC SC FW FW FW FW FW
CLOUDS(%) 85 75 53 42 25 36 68 86 90 99 99 60 59 34 42 23 23 17 8 8
VSBY 10 10 10 10 10 6 8 10 10 6 6 10 10 10 10 10 10 10 10 10
POP 12HR 60 20 100 40 10
RAIN SHWRS SC O O O O SC SC
TSTMS IS IS SC
MIX HGT 2 2 3 <1 <1 <1 <1 <1 1 2 2 <1 <1 <1 <1 1 5 8 8 <1
T WIND DIR S S SW SW S S S S S SE S S W W NW NW NW NW NW NW
T WIND SPD 14 19 14 10 9 8 6 8 10 12 10 10 18 16 14 20 19 13 14 8
DISPERSION VP VP VP VP PR PR PR PR PR
ADI 29 54 47 5 4 4 3 8 19 28 23 7 12 7 13 37120114128 4
MAX LVORI 3 1 1 3 4 6 6 6 4 4 3 4 4 4 4 3 1 1 1 2
STABILITY C C C F G G F B C C C E E F D B B B B F
CEILING 4100 None None 600 700 400 None None None None
STA PRES 29.43 29.34 29.31 29.25 29.15 28.99 29.01 29.11 29.17 29.17
Date Fri 05/01/26Sat 05/02/26Sun 05/03/26Mon 05/04/26
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 42 70 45 59 39 67 42 74
TEMP 46 47 67 63 51 47 55 54 44 43 64 60 48 47 72 67
DEWPT 35 37 38 40 41 41 42 40 37 35 34 35 36 38 41 44
RH 65 68 34 43 68 79 61 59 76 73 32 39 63 71 33 43
WIND SPD <15 <15 <15 <15 <15 <15 <15 <15
AVG CLOUDS FW SC SC B1 B2 B2 B2 B1 SC FW FW FW FW FW FW SC
POP 12HR 5 10 40 40 10 5 5 10
RAIN SHWRS SC SC SC 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