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EXPERIMENTAL...FIRE WEATHER POINT FORECAST MATRICES
NATIONAL WEATHER SERVICE Blacksburg VA
731 PM EDT Tue May 19 2026
VAZ024-200800-
RAWS 441631
37.63N 79.51W Elev. 865 ft
731 PM EDT Tue May 19 2026
Date 05/19/26 Wed 05/20/26 Thu 05/21/26 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 67 94 63 70 54
TEMP 87 77 73 69 71 87 93 92 82 74 69 66 63 69 70 66 61 57 56 54 54
DEWPT 60 59 57 57 59 64 61 62 65 65 64 64 63 65 63 61 57 56 55 54 54
MIN/MAX RH 68 35 100 78 100
RH 40 54 57 66 66 46 35 37 56 74 84 93100 87 78 84 87 96 96100100
WIND DIR N SW SW W N W W S NW N N N N E E NE NE NE NE NE E
WIND SPD 0 2 2 1 0 2 4 4 2 1 0 0 2 3 5 5 4 2 1 2 2
WIND GUST 16
CLOUDS FW SC SC FW CL CL FW FW SC B2 B2 B2 OV B2 OV OV OV OV OV OV B2
CLOUDS(%) 24 26 34 14 4 2 9 19 43 70 75 77 91 85 91 91 93 93 92 92 87
VSBY 10 10 10 10 10 10 10 10 10 10 5 2 3 6 6 3 1 1 2 2 1
POP 12HR 5 20 70 90 90
RAIN SHWRS NM SC SC NM NM O O O O O O O
TSTMS IS IS IS IS
MIX HGT <1 <1 <1 <1 <1 5 8 6 <1 <1 <1 <1 1 2 2 2 1
T WIND DIR SW S SW W W W W W N NE E E E NE NE NE NE
T WIND SPD 11 4 4 2 2 14 8 5 2 9 6 6 10 14 13 12 8
DISPERSION VP VP VP VP VP VP VP VP VP VP VP VP
ADI 5 2 2 1 2 88 77 26 1 4 3 3 15 32 32 29 5
MAX LVORI 2 2 3 3 3 1 1 2 3 3 5 6 5 4 3 3 5
STABILITY G F G G A A A C F F F F B B C C E
CEILING None None None None 2200 300 400 1100 1200
STA PRES 28.60 28.60 28.60 28.53 28.58 28.60 28.67 28.68
Date 05/22Sat 05/23/26Sun 05/24/26Mon 05/25/26Tue 05/26/26
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 62 54 74 60 80 61 82 63 83
TEMP 60 62 59 56 71 71 64 62 79 75 66 64 80 76 68 65 80 77
DEWPT 57 57 56 56 63 64 61 61 66 67 63 62 67 68 65 63 67 68
RH 90 84 90100 76 79 90 97 64 76 90 93 65 76 90 93 65 74
WIND SPD <15 <15 <15 <15 <15 <15 <15 <15 <15
AVG CLOUDS B2 B2 B2 B2 B2 B2 B2 B2 B2 B2 B2 B2 B2 B2 B2 B2 B2 B2
POP 12HR 80 60 60 50 60 50 70 50 60
RAIN SHWRS O SC NM SC SC NM SC IS IS NM SC SC SC NM SC SC SC NM
TSTMS IS SC IS SC IS SC IS 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