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EXPERIMENTAL...FIRE WEATHER POINT FORECAST MATRICES
NATIONAL WEATHER SERVICE Blacksburg VA
801 PM EDT Tue Apr 28 2026
VAZ046-290800-
RAWS 441101
37.39N 78.80W Elev. 804 ft
801 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 72 51 69 42
TEMP 58 56 54 56 64 66 70 67 60 56 52 53 62 67 68 61 51 46 43 47
DEWPT 54 53 53 55 60 62 62 61 57 53 49 47 44 41 37 36 35 35 35 37
MIN/MAX RH 100 71 91 32 75
RH 86 90 96 96 87 87 76 81 90 90 89 80 52 39 32 39 54 65 73 68
WIND DIR S S S S S S S W W NW NW NW NW NW NW NW NW NW W W
WIND SPD 5 3 2 3 5 8 8 5 5 6 8 8 10 10 11 6 5 3 3 4
WIND GUST 17 18
CLOUDS B1 OV OV OV OV OV B2 B1 B1 B1 B1 SC SC FW FW FW FW SC SC SC
CLOUDS(%) 65 90 95 97 97 88 84 63 57 52 59 36 26 18 12 10 24 32 41 29
VSBY 10 6 4 6 5 3 4 5 5 10 10 10 10 10 10 10
POP 12HR 10 90 40 5 5
RAIN SHWRS SC NM O O SC SC
TSTMS SC SC SC SC
MIX HGT <1 <1 <1 <1 1 2 2 <1 <1 <1 <1 1 5 8 8 <1
T WIND DIR S S S S SW S S SW W NW NW NW NW NW NW NW
T WIND SPD 8 3 3 8 8 16 13 14 11 12 11 17 12 14 17 9
DISPERSION PR VP VP PR PR PR PR PR PR VP VP
ADI 4 2 2 8 13 36 35 10 8 8 10 25 72119 88 4
MAX LVORI 6 7 8 6 4 4 3 4 5 5 5 3 1 1 1 2
STABILITY F F F B C C C E E E D B B B C F
CEILING 1500 12100 1500 500 None None None None None
STA PRES 29.31 29.25 29.17 29.01 29.00 29.06 29.13 29.13
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 69 45 61 38 65 41 71 46 75
TEMP 67 62 51 46 57 55 44 43 62 58 46 47 67 64 51 51 72 68
DEWPT 37 40 40 40 40 39 35 35 31 32 34 37 39 40 40 43 45 46
RH 33 44 66 79 53 55 70 73 31 37 63 68 36 41 66 74 38 45
WIND SPD <15 <15 <15 <15 <15 <15 <15 <15 <15
AVG CLOUDS SC SC B1 B2 B2 B1 SC FW CL FW FW FW FW FW SC SC FW SC
POP 12HR 10 30 40 10 5 5 10 10 20
RAIN SHWRS IS SC SC SC 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