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EXPERIMENTAL...FIRE WEATHER POINT FORECAST MATRICES
NATIONAL WEATHER SERVICE Blacksburg VA
631 AM EDT Mon May 11 2026
NCZ005-112000-
RAWS 310540
36.38N 79.70W Elev. 858 ft
631 AM EDT Mon May 11 2026
Date Mon 05/11/26 Tue 05/12/26 Wed 05/13/26
UTC 3hrly 09 12 15 18 21 00 03 06 09 12 15 18 21 00 03 06 09 12 15 18 21 00
EDT 3hrly 05 08 11 14 17 20 23 02 05 08 11 14 17 20 23 02 05 08 11 14 17 20
MAX/MIN TEMP 60 47 72 52 74
TEMP 59 60 59 58 56 52 50 47 49 64 71 72 66 56 54 52 56 68 73 73 68
DEWPT 48 44 47 48 48 46 45 44 47 48 45 43 45 43 43 45 48 52 53 56 58
MAX/MIN RH 54 92 35 79 49
RH 67 55 64 69 74 80 83 89 93 56 39 35 47 62 66 77 74 57 49 55 70
WIND DIR NE NE NE NE NE N N N N E S S S S S SW SW SW SW SW SW
WIND SPD 9 11 9 6 3 2 3 2 1 2 3 4 3 4 6 8 9 12 12 10 4
WIND GUST 21 23
CLOUDS B2 OV OV OV B1 FW SC B1 B1 CL FW CL FW FW CL FW SC B1 B2 B2 B2
CLOUDS(%) 87 91 93 91 59 14 48 69 64 3 6 4 12 10 5 9 26 53 78 78 76
VSBY 10 10 7 7 10 9 8 2 2 10 10 10 10 10 10 10 10 10 10 10
POP 12HR 80 0 0 0 70
RAIN SHWRS IS NM NM NM NM NM
TSTMS IS IS SC IS
MIX HGT 2 2 2 2 <1 <1 <1 <1 <1 3 7 7 <1 <1 <1 <1 1 4 6 2 <1
T WIND DIR NE NE N NE N NE SW SW W NE W SW S S SW S SW SW SW SW SE
T WIND SPD 17 20 17 11 6 1 1 1 1 3 3 5 2 4 6 8 16 21 25 12 2
DISPERSION VP VP VP VP VP VP PR PR VP
ADI 38 44 36 23 3 1 1 1 1 15 29 48 1 2 3 5 31 60 81 36 2
MAX LVORI 3 1 1 3 4 6 8 8 10 2 2 1 2 3 3 4 3 1 1 1 3
STABILITY C D C C F G F F A A A A G F F E B D D C E
CEILING 1200 500 None 32000 None None None None None 1200
STA PRES 29.38 29.39 29.44 29.46 29.49 29.41 29.41 29.36 29.32 29.19
Date Thu 05/14/26Fri 05/15/26Sat 05/16/26Sun 05/17/26
UTC 6hrly 06 12 18 00 06 12 18 00 06 12 18 00 06 12 18 00
EDT 6hrly 02 08 14 20 02 08 14 20 02 08 14 20 02 08 14 20
MIN/MAX TEMP 52 71 46 76 53 85 61 89
TEMP 56 54 70 65 50 51 73 69 56 58 83 79 66 65 87 82
DEWPT 54 51 44 43 42 43 43 47 47 50 54 56 55 58 57 58
RH 93 90 39 45 74 74 34 45 72 75 37 45 68 78 36 44
WIND SPD <15 <15 <15 <15 <15 <15 <15 <15
AVG CLOUDS B2 FW FW FW FW CL CL FW FW FW SC SC SC SC SC SC
POP 12HR 60 0 0 0 0 0 5 5
RAIN SHWRS NM
TSTMS 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