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EXPERIMENTAL...FIRE WEATHER POINT FORECAST MATRICES
NATIONAL WEATHER SERVICE Blacksburg VA
801 PM EDT Wed May 13 2026
VAZ046-140800-
RAWS 441101
37.39N 78.80W Elev. 804 ft
801 PM EDT Wed May 13 2026
Date 05/13/26 Thu 05/14/26 Fri 05/15/26 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 49 66 45 76 50
TEMP 59 56 51 52 61 64 65 60 52 48 46 50 65 73 76 70 59 54 51 56
DEWPT 55 54 50 48 43 42 40 40 39 41 40 41 40 41 41 44 43 44 44 46
MIN/MAX RH 95 41 81 28 77
RH 87 93 96 86 51 45 40 47 61 77 79 71 40 31 28 39 55 69 77 69
WIND DIR W NW NW NW NW NW NW NW W W W W NW W W SW SW SW SW SW
WIND SPD 4 4 5 8 10 11 12 8 5 5 5 5 6 5 5 3 3 2 2 3
WIND GUST 18
CLOUDS B2 B1 FW FW SC B2 B1 FW CL CL CL CL CL FW FW SC SC SC SC SC
CLOUDS(%) 84 58 25 7 38 79 52 7 3 4 3 2 5 11 18 37 40 35 38 33
VSBY 8 10 9 10 10 10 10 10 10 10 10 10 10 10 10 10 10 10 10 10
POP 12HR 70 0 0 0 0
RAIN SHWRS SC
TSTMS
MIX HGT <1 <1 <1 2 5 7 7 <1 <1 <1 <1 1 5 6 7 <1
T WIND DIR W NW NW NW NW NW NW NW W W W W NW NW W W
T WIND SPD 9 13 5 12 12 12 16 13 5 5 5 14 16 10 10 2
DISPERSION VP VP PR PR PR PR PR VP VP VP VP
ADI 6 9 3 26 76 44 55 9 3 3 3 27 96 78 83 1
MAX LVORI 5 6 6 4 1 1 1 2 3 3 5 3 1 1 1 2
STABILITY E E F B B D D E F F F A B A A G
CEILING 3800 None None None None None None None None
STA PRES 29.09 29.12 29.17 29.18 29.25 29.27 29.32 29.29
Date 05/16Sun 05/17/26Mon 05/18/26Tue 05/19/26Wed 05/20/26
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 85 61 87 63 89 64 89 67 88
TEMP 82 79 66 64 86 80 67 66 88 82 69 68 88 83 72 70 87 81
DEWPT 53 57 56 57 59 61 60 61 61 62 60 61 61 62 62 63 62 63
RH 37 47 70 78 40 52 78 84 40 51 73 78 40 49 71 78 43 54
WIND SPD <15 <15 <15 <15 <15 <15 <15 <15 <15
AVG CLOUDS SC SC SC SC SC SC SC SC FW FW FW FW FW FW SC SC SC B1
POP 12HR 5 5 10 10 5 5 5 10 30
RAIN SHWRS SC
TSTMS 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
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