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EXPERIMENTAL...FIRE WEATHER POINT FORECAST MATRICES
NATIONAL WEATHER SERVICE Blacksburg VA
531 PM EDT Wed May 20 2026
VAZ024-210800-
RAWS 441631
37.63N 79.51W Elev. 865 ft
531 PM EDT Wed May 20 2026
Date 05/20/26 Thu 05/21/26 Fri 05/22/26 Sat
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 66 72 55 60 54
TEMP 82 75 70 67 68 71 69 64 60 58 57 57 55 58 59 60 59 57 55 54 54
DEWPT 62 62 63 63 63 65 64 61 60 58 57 56 55 58 59 59 57 56 55 53 54
MIN/MAX RH 88 81 100 93 100
RH 51 64 78 87 84 81 84 90100100100 96100100100 96 93 96100 96100
WIND DIR W N N NE NE NE NE NE E NE NE NE NE E E E E E E E E
WIND SPD 2 2 3 2 3 3 5 6 4 3 2 2 2 3 4 4 3 2 1 1 1
WIND GUST 16 13
CLOUDS SC B2 B1 B1 B2 OV OV OV OV OV OV OV OV OV B2 B2 OV OV OV OV OV
CLOUDS(%) 49 70 61 68 77 88 94 95 95 96 94 94 95 95 87 86 91 91 92 92 92
VSBY 10 10 10 6 5 5 3 3 3 3 3 3 3 3 2 1 2
POP 12HR 60 80 80 80 80
RAIN SHWRS IS SC SC IS IS SC O NM O NM O O O O O O O O O O O
TSTMS IS IS IS IS IS
MIX HGT <1 <1 <1 <1 1 2 2 1 1 1 1 1 1 2 1 2 1
T WIND DIR S W NE E E E NE N NE NE N NE NE NE NE E NE
T WIND SPD 12 1 3 8 9 11 14 9 10 10 8 8 11 12 10 11 10
DISPERSION VP VP VP VP VP VP VP VP VP VP VP VP
ADI 6 1 2 4 13 27 34 17 7 5 4 4 17 25 19 26 5
MAX LVORI 2 4 5 6 4 4 4 5 8 9 9 9 5 5 5 4 6
STABILITY F F E F C C C C E F F F B B C C F
CEILING 6100 3100 300 600 400 1100 1100 1100 500
STA PRES 28.53 28.55 28.58 28.60 28.62 28.63 28.69 28.69
Date 05/23Sun 05/24/26Mon 05/25/26Tue 05/26/26Wed 05/27/26
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 68 54 79 62 82 63 82 63 82
TEMP 63 68 61 58 76 75 68 65 81 76 69 65 80 76 69 65 80 75
DEWPT 62 64 61 58 68 68 65 64 69 69 65 64 68 69 65 63 67 68
RH 97 87100100 76 79 90 97 67 79 87 97 67 79 87 93 65 79
WIND SPD <15 <15 <15 <15 <15 <15 <15 <15 <15
AVG CLOUDS OV B2 B2 B2 B2 B2 B2 B2 B2 B2 B1 B1 B2 B2 B1 B2 B2 B2
POP 12HR 80 70 60 40 70 40 60 40 60
RAIN SHWRS O SC NM SC IS NM SC IS SC NM SC SC NM NM SC IS SC NM
TSTMS SC IS SC IS SC IS SC IS 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