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EXPERIMENTAL...FIRE WEATHER POINT FORECAST MATRICES
NATIONAL WEATHER SERVICE Blacksburg VA
431 PM EDT Mon Apr 27 2026
VAZ024-280800-
RAWS 441631
37.63N 79.51W Elev. 865 ft
431 PM EDT Mon Apr 27 2026
Date 04/27/26 Tue 04/28/26 Wed 04/29/26 Thu
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 43 68 50 71 47
TEMP 71 63 54 49 46 47 55 61 68 64 58 54 51 53 63 67 69 66 59 55 50 48
DEWPT 41 41 40 40 40 42 46 49 51 53 53 52 51 53 58 60 61 57 53 48 43 42
MIN/MAX RH 84 56 100 73 82
RH 34 44 59 71 79 83 72 65 54 67 83 93100100 84 78 76 73 80 77 77 80
WIND DIR SE SE SE SE E SE SW S S SE S SW SE SE S S S W W NW NW NW
WIND SPD 5 3 2 2 2 2 4 5 4 2 1 1 1 1 2 5 5 4 4 3 4 5
WIND GUST 16 16 14 14 19
CLOUDS FW SC SC SC SC B2 B2 B2 B1 SC B1 B1 B2 OV OV OV OV B1 B1 SC SC FW
CLOUDS(%) 18 36 26 37 45 85 82 79 61 43 55 63 73 92 92100100 60 60 39 32 16
VSBY 10 10 10 10 10 10 3 3 6 3 5 2 3 10 2 3 3 10
POP 12HR 20 70 40 100 40
RAIN SHWRS SC NM SC IS SC SC O O O O SC SC
TSTMS SC SC
MIX HGT 4 <1 <1 <1 <1 1 2 2 3 <1 <1 <1 <1 1 2 2 2 1
T WIND DIR SE SE SE SE S S S S S SE NE N E S S S S W
T WIND SPD 10 6 5 11 5 10 9 6 4 1 1 2 1 2 6 14 8 11
DISPERSION VP VP VP VP VP VP VP VP VP VP VP VP
ADI 57 3 3 5 3 15 24 20 14 1 1 1 1 3 14 31 15 8
MAX LVORI 1 2 3 3 5 4 3 3 2 4 6 7 10 9 4 3 4 3
STABILITY A G G F F B B C C F F F F B B D D E
CEILING None 7800 1600 1100 None 200 100 2800 None
STA PRES 28.68 28.66 28.63 28.56 28.52 28.44 28.34 28.19
Date 04/30Fri 05/01/26Sat 05/02/26Sun 05/03/26Mon 05/04/26
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 69 40 70 43 62 37 69 42 75
TEMP 66 60 45 45 67 62 49 46 59 56 43 42 65 62 48 47 73 68
DEWPT 35 33 34 36 36 38 38 38 39 35 31 32 34 35 36 39 41 42
RH 32 36 65 70 32 41 66 73 47 45 62 67 31 36 63 74 31 39
WIND SPD <15 <15 <15 <15 <15 <15 <15 <15 <15
AVG CLOUDS FW FW CL FW SC B1 B1 B1 B1 B1 SC FW FW SC FW FW FW SC
POP 12HR 10 5 20 40 40 10 10 5 10
RAIN SHWRS IS SC SC SC SC
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