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EXPERIMENTAL...FIRE WEATHER POINT FORECAST MATRICES
NATIONAL WEATHER SERVICE Blacksburg VA
801 PM EDT Sun May 17 2026
VAZ024-180800-
RAWS 441631
37.63N 79.51W Elev. 865 ft
801 PM EDT Sun May 17 2026
Date 05/17/26 Mon 05/18/26 Tue 05/19/26 Wed
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 63 92 64 94 65
TEMP 72 68 64 68 83 91 91 83 76 71 66 70 84 92 92 86 77 70 66 70
DEWPT 60 60 61 62 63 63 63 62 59 59 58 60 63 60 59 58 56 56 56 59
MIN/MAX RH 90 39 78 32 72
RH 66 76 90 81 51 40 40 49 56 66 75 71 49 34 33 39 48 61 70 68
WIND DIR N N N N SW S S S SW SW N N SW SW S S SW SW W W
WIND SPD 0 0 0 0 3 5 6 4 3 2 0 0 2 5 6 4 3 2 1 1
WIND GUST 17 16 18 18 13
CLOUDS FW CL CL CL CL CL CL FW FW FW SC SC FW FW FW FW FW FW FW FW
CLOUDS(%) 9 4 3 2 1 5 5 20 20 16 30 32 13 15 20 23 18 17 12 13
VSBY 10 10 10 10 10 10 10 10 10 10 10 10 10 10 10 10 10 8 8 10
POP 12HR 0 0 0 0 0
MIX HGT <1 <1 <1 <1 3 7 6 <1 <1 <1 <1 <1 4 7 8 <1
T WIND DIR SW W W W W SW SW S SW SW W W W W W SW
T WIND SPD 2 1 2 1 6 9 12 6 6 3 2 3 12 11 12 3
DISPERSION VP VP VP VP VP VP VP VP VP VP VP
ADI 1 1 1 1 30 76 90 3 3 2 1 3 63 98104 2
MAX LVORI 3 4 6 5 1 1 1 2 3 3 4 4 1 1 1 2
STABILITY 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
STA PRES 28.64 28.70 28.73 28.68 28.70 28.70 28.71 28.63
Date 05/20Thu 05/21/26Fri 05/22/26Sat 05/23/26Sun 05/24/26
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 91 62 74 54 71 56 77 61 83
TEMP 90 82 70 63 71 68 59 56 67 67 61 58 74 72 65 63 80 76
DEWPT 63 67 65 60 59 55 53 52 56 57 56 57 64 65 62 62 66 67
RH 41 61 84 90 66 63 80 86 68 70 84 96 71 79 90 97 62 74
WIND SPD <15 <15 <15 <15 <15 <15 <15 <15 <15
AVG CLOUDS FW B2 B2 B2 B2 OV B2 B2 B2 B2 B2 B2 B2 B2 B2 B2 B2 B2
POP 12HR 70 80 80 60 60 70 70 60 70
RAIN SHWRS NM NM O O O NM NM NM SC NM SC NM NM NM SC SC NM
TSTMS SC SC IS IS 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