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EXPERIMENTAL...FIRE WEATHER POINT FORECAST MATRICES
NATIONAL WEATHER SERVICE Blacksburg VA
801 AM EDT Sun May 17 2026
VAZ024-172000-
RAWS 441631
37.63N 79.51W Elev. 865 ft
801 AM EDT Sun May 17 2026
Date Sun 05/17/26 Mon 05/18/26 Tue 05/19/26
UTC 3hrly 09 12 15 18 21 00 03 06 09 12 15 18 21 00 03 06 09 12 15 18 21 00
EDT 3hrly 05 08 11 14 17 20 23 02 05 08 11 14 17 20 23 02 05 08 11 14 17 20
MAX/MIN TEMP 92 63 93 65 94
TEMP 82 90 90 82 73 68 64 67 85 92 92 84 76 69 65 68 85 92 93 86
DEWPT 64 62 63 64 61 60 59 61 65 63 62 61 59 59 58 60 63 60 59 58
MAX/MIN RH 39 85 37 79 32
RH 55 39 41 55 66 76 84 81 51 38 37 46 56 70 78 76 48 34 32 39
WIND DIR N SW S S N N N N SW S S S S SW SW N SW S S S
WIND SPD 0 3 3 1 0 0 0 0 2 5 6 3 3 2 1 0 2 5 8 4
WIND GUST 18 14 18 17
CLOUDS CL FW FW FW FW FW FW FW CL FW CL FW FW FW FW FW FW FW FW FW
CLOUDS(%) 5 7 16 10 12 8 9 13 2 12 5 7 13 22 21 22 11 14 17 22
VSBY 10 10 10 10 10 10 8 10 10 10 10 10 10 10 10 10 9 10 10 10
POP 12HR 5 5 0 0 0
MIX HGT 4 6 6 <1 <1 <1 <1 <1 3 6 7 <1 <1 <1 <1 <1 4 7 8 <1
T WIND DIR NW S SW SW S SW NW NW W S S S SW SW W W NW SW SW SW
T WIND SPD 2 6 13 8 2 2 2 1 3 5 9 4 5 3 2 2 6 6 11 4
DISPERSION VP VP VP VP VP VP VP VP VP
ADI 11 53103 4 1 1 1 1 15 44 67 2 3 2 1 2 34 61 96 2
MAX LVORI 2 1 1 3 3 3 5 5 2 1 1 2 3 3 4 3 1 1 1 2
STABILITY A A A G G G G A A A B G G G G A A A B F
CEILING None None None None None None None None None None
STA PRES 28.64 28.59 28.65 28.69 28.73 28.68 28.70 28.70 28.72 28.64
Date Wed 05/20/26Thu 05/21/26Fri 05/22/26Sat 05/23/26
UTC 6hrly 06 12 18 00 06 12 18 00 06 12 18 00 06 12 18 00
EDT 6hrly 02 08 14 20 02 08 14 20 02 08 14 20 02 08 14 20
MIN/MAX TEMP 66 93 61 76 54 70 54 74
TEMP 70 69 92 82 70 64 74 70 61 57 68 66 60 57 72 70
DEWPT 56 59 61 65 63 60 60 57 53 52 56 57 55 56 62 62
RH 61 70 36 56 78 87 62 63 75 83 65 73 84 96 71 76
WIND SPD <15 <15 <15 <15 <15 <15 <15 <15
AVG CLOUDS FW FW FW B1 B1 B1 B2 B2 B2 B2 B2 B2 B2 B2 B2 B2
POP 12HR 0 50 50 70 60 60 50 50
RAIN SHWRS SC SC SC NM NM NM NM NM NM SC SC SC SC
TSTMS SC SC 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