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EXPERIMENTAL...FIRE WEATHER POINT FORECAST MATRICES
NATIONAL WEATHER SERVICE Blacksburg VA
101 AM EDT Tue May 12 2026
NCZ003-130800-
RAWS 310301
36.48N 80.86W Elev. 1300 ft
101 AM EDT Tue May 12 2026
Date 05/11/26 Tue 05/12/26 Wed 05/13/26 Thu
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 42 74 47 74 46
TEMP 46 43 47 64 71 73 68 56 52 49 52 67 71 73 68 58 52 47 49
DEWPT 43 40 42 46 45 45 47 44 42 41 44 51 55 56 57 53 49 43 41
MIN/MAX RH 95 36 77 55 88
RH 89 89 83 52 39 37 47 64 69 74 74 56 57 55 68 83 89 86 74
WIND DIR N N N S S S S N W S SW S SW SW W W NW NW NW
WIND SPD 0 0 0 3 5 5 2 0 1 1 1 6 9 6 3 3 4 5 10
WIND GUST 12 17 18 13 14 21 20 26
CLOUDS SC FW FW CL CL FW FW FW FW FW FW FW B2 B2 B1 SC FW CL FW
CLOUDS(%) 40 24 21 2 4 13 24 17 7 7 10 24 78 78 57 33 9 5 10
VSBY 7 1 1 10 10 10 10 10 10 10 10 10 10 10 10 10 10 10 10
POP 12HR 0 0 0 60 40
RAIN SHWRS SC NM SC IS
TSTMS SC SC
Obvis F PF
MIX HGT <1 <1 <1 4 7 6 <1 <1 <1 <1 1 3 5 4 <1
T WIND DIR NW NW NW SW SW SW S S SW SW SW SW SW SW SW
T WIND SPD 3 3 2 2 8 12 9 8 5 9 14 14 16 14 8
DISPERSION VP VP VP VP VP VP VP VP VP PR
ADI 2 2 2 13 64 95 4 4 3 4 22 63 68 56 4
MAX LVORI 7 6 5 2 1 1 2 3 3 3 3 1 1 1 3
STABILITY G G A A A A G G G G A B C C G
CEILING None None None None None None 2200 None
STA PRES 28.28 28.31 28.25 28.24 28.18 28.12 28.00
Date 05/14Fri 05/15/26Sat 05/16/26Sun 05/17/26Mon 05/18/26
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 67 41 75 51 85 57 88 59 89
TEMP 64 58 44 45 71 70 54 57 83 78 62 62 86 81 65 64 86 83
DEWPT 41 41 40 39 42 46 45 46 56 60 56 55 58 59 56 56 59 60
RH 43 53 86 79 35 42 71 67 40 54 81 78 39 47 73 75 40 46
WIND SPD <15 <15 <15 <15 <15 <15 <15 <15 <15
AVG CLOUDS FW FW FW CL FW FW FW SC FW SC SC FW FW FW SC FW FW FW
POP 12HR 0 0 0 5 20 20 20 5 20
RAIN SHWRS IS IS IS IS
TSTMS IS IS 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
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