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EXPERIMENTAL...FIRE WEATHER POINT FORECAST MATRICES
NATIONAL WEATHER SERVICE Blacksburg VA
831 PM EDT Mon May 11 2026
NCZ005-120800-
RAWS 310540
36.38N 79.70W Elev. 858 ft
831 PM EDT Mon May 11 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 43 75 51 77 50
TEMP 48 47 44 47 64 72 73 66 58 56 53 55 70 75 73 67 60 55 51 53
DEWPT 48 45 43 47 47 44 43 45 43 43 45 48 52 53 56 58 57 54 49 48
MIN/MAX RH 100 34 78 45 97
RH 100 93 96100 54 37 34 47 57 62 74 77 53 46 55 73 90 96 93 83
WIND DIR NE N W NW SE S SW S S S SW SW SW SW SW SW SW W NW NW
WIND SPD 1 0 1 1 2 4 5 4 5 8 8 9 12 12 11 5 4 4 4 6
WIND GUST 18 23
CLOUDS FW SC B1 B1 CL CL CL FW CL CL FW FW SC B2 B2 B1 B1 SC FW CL
CLOUDS(%) 18 30 68 59 3 5 3 7 5 4 14 12 29 73 73 66 66 27 12 4
VSBY 8 7 0 4 10 10 10 10 10 10 10 10 10 10 10 10 10 10 10 10
POP 12HR 0 0 0 50 50
RAIN SHWRS IS SC SC SC
TSTMS SC
Obvis PF+ PF PF PF
MIX HGT <1 <1 <1 <1 3 7 7 <1 <1 <1 <1 1 4 7 4 <1
T WIND DIR NE SW W W S SW SW S S S SW SW SW SW SW S
T WIND SPD 5 1 1 1 3 5 10 4 4 6 9 16 20 21 19 5
DISPERSION VP VP VP VP PR PR PR PR VP VP VP
ADI 3 1 1 1 15 49 91 2 2 5 6 29 80 77 53 4
MAX LVORI 9 10 10 10 2 1 1 2 3 3 3 3 1 1 1 3
STABILITY G G F A A A A F F E E B C D D E
CEILING None 35000 None None None None None 3300 3200
STA PRES 29.44 29.46 29.49 29.42 29.41 29.36 29.30 29.15
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 70 43 74 51 86 61 89 63 91
TEMP 67 60 47 48 71 69 54 56 83 79 66 65 88 82 68 67 89 84
DEWPT 42 42 42 42 42 46 46 49 54 57 57 59 57 58 59 61 59 60
RH 40 51 83 80 35 44 74 77 37 47 73 81 35 44 73 81 37 44
WIND SPD <15 <15 <15 <15 <15 <15 <15 <15 <15
AVG CLOUDS FW FW FW CL CL FW FW SC SC FW SC SC SC FW FW FW FW FW
POP 12HR 0 0 0 5 10 20 20 5 10
RAIN SHWRS IS IS
TSTMS 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