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EXPERIMENTAL...FIRE WEATHER POINT FORECAST MATRICES
NATIONAL WEATHER SERVICE Blacksburg VA
1031 PM EDT Tue Apr 28 2026
VAZ024-290800-
RAWS 441631
37.63N 79.51W Elev. 865 ft
1031 PM EDT Tue Apr 28 2026
Date 04/28/26 Wed 04/29/26 Thu 04/30/26 Fri
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 52 74 49 68 40
TEMP 60 57 55 55 65 69 73 68 60 54 50 51 62 67 66 58 50 45 41 45
DEWPT 57 55 55 55 60 61 62 58 53 49 46 45 42 38 35 34 34 34 35 35
MIN/MAX RH 100 67 88 31 79
RH 90 93100100 84 76 68 70 78 83 86 80 48 34 32 40 54 65 79 68
WIND DIR SE E S E S S SW W W NW NW NW NW NW NW NW NW W W W
WIND SPD 3 2 2 1 2 5 4 4 3 3 3 4 6 9 9 4 2 2 2 2
WIND GUST 16 14 13 13 14 19 19 20 17
CLOUDS SC B2 OV OV OV B2 B1 SC B1 SC SC SC FW SC FW FW SC SC SC SC
CLOUDS(%) 47 87 91100 98 76 56 37 57 47 46 37 22 30 14 8 27 34 36 38
VSBY 9 3 1 2 3 3 4 5 4 10 10 10 10 9 9 9
POP 12HR 30 90 40 10 5
RAIN SHWRS SC O O NM SC SC
TSTMS IS IS SC SC
Obvis PF
MIX HGT <1 <1 <1 <1 2 2 3 <1 <1 <1 <1 2 5 8 8 1
T WIND DIR SE S S S S S S SW NW W NW NW NW NW NW NW
T WIND SPD 1 1 2 2 5 13 9 9 12 9 10 18 16 17 19 12
DISPERSION VP VP VP VP VP VP VP VP VP VP VP
ADI 1 1 1 2 13 33 29 6 6 4 5 51 99141158 6
MAX LVORI 6 7 10 9 4 3 3 3 4 5 5 3 1 1 1 2
STABILITY F F F B B C C E F F F A B B B F
CEILING 200 100 None None None None None None
STA PRES 28.43 28.34 28.20 28.23 28.28 28.34 28.36
Date 05/01Sat 05/02/26Sun 05/03/26Mon 05/04/26Tue 05/05/26
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 71 44 64 35 66 39 71 43 76
TEMP 67 63 49 45 61 56 42 40 63 59 45 44 68 64 50 47 72 67
DEWPT 36 37 38 38 37 34 32 32 29 31 33 35 38 39 39 42 44 45
RH 32 38 66 76 41 43 67 73 27 34 62 70 33 40 66 83 37 45
WIND SPD <15 <15 <15 <15 <15 <15 <15 <15 <15
AVG CLOUDS SC B1 B1 B2 B2 B1 SC FW CL FW FW FW FW SC SC SC SC SC
POP 12HR 20 30 30 10 5 5 10 20 20
RAIN SHWRS IS IS SC SC IS IS 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