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EXPERIMENTAL...FIRE WEATHER POINT FORECAST MATRICES
NATIONAL WEATHER SERVICE Blacksburg VA
401 PM EDT Sun May 17 2026
VAZ018-180800-
RAWS 444002
37.56N 80.18W Elev. 2702 ft
401 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 89 65 92 66
TEMP 84 77 70 67 64 69 82 87 88 81 74 70 66 70 82 90 90 81 74 70 67 72
DEWPT 61 62 59 56 56 60 63 59 57 57 55 54 54 58 59 54 54 55 54 53 54 58
MIN/MAX RH 75 35 68 29 64
RH 46 60 68 68 75 73 53 39 35 44 51 57 65 66 46 30 30 41 50 55 63 61
WIND DIR S S SW W W W SW S S S SW SW W W SW SW SW SW SW W W W
WIND SPD 3 2 1 2 2 1 2 5 6 4 4 3 2 1 3 4 6 3 3 3 3 3
WIND GUST 16 20 18 17 16 12 14 18 14 16 14 13 13
CLOUDS SC FW FW CL FW FW CL FW FW FW SC FW FW SC FW FW FW FW FW FW FW SC
CLOUDS(%) 31 16 7 3 11 25 2 6 11 14 27 25 16 26 12 23 21 24 22 18 18 26
VSBY 10 10 10 10 10 10 10 10 10 10 10 10 10 10 10 10 10 10 10 9 9 10
POP 12HR 5 0 0 5 0
MIX HGT 5 <1 <1 <1 <1 <1 4 7 7 <1 <1 <1 <1 <1 5 8 9 <1
T WIND DIR S S SW W W W W SW S S SW W W W W W W SW
T WIND SPD 5 6 4 2 3 3 8 10 12 14 8 5 4 4 13 11 11 3
DISPERSION VP VP VP VP VP VP VP VP VP VP VP VP
ADI 34 3 2 1 2 3 41 90 95 7 4 3 2 4 83109103 2
MAX LVORI 1 3 3 3 3 4 1 1 1 2 2 3 3 3 1 1 1 2
STABILITY A G G G G A A A B F F G G A A A B G
CEILING None None None None None None None None None
STA PRES 27.93 27.99 28.03 27.97 28.00 28.00 28.01 27.94
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 86 64 73 56 68 58 76 62 81
TEMP 84 77 68 66 71 66 59 58 65 64 61 61 73 69 65 65 77 73
DEWPT 62 64 61 60 60 55 50 50 55 55 54 55 63 62 59 60 65 64
RH 48 64 78 81 68 68 72 75 70 73 78 81 71 78 81 84 67 73
WIND SPD <15 <15 <15 <15 <15 <15 <15 <15 <15
AVG CLOUDS SC B2 B2 B2 OV OV B2 B2 B2 B2 B2 B2 B2 B2 B2 B2 B1 B2
POP 12HR 80 70 80 70 70 60 80 50 80
RAIN SHWRS O NM NM O O NM SC NM NM NM SC NM O SC SC SC O
TSTMS SC SC IS IS SC SC SC 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