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EXPERIMENTAL...FIRE WEATHER POINT FORECAST MATRICES
NATIONAL WEATHER SERVICE Blacksburg VA
731 PM EDT Tue May 19 2026
NCZ006-200800-
RAWS 310801
36.37N 79.29W Elev. 580 ft
731 PM EDT Tue May 19 2026
Date 05/19/26 Wed 05/20/26 Thu 05/21/26 Fri
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 68 97 67 85 57
TEMP 86 77 73 69 72 86 95 95 88 76 72 67 69 81 85 79 69 62 60 57 57
DEWPT 60 59 60 61 63 64 58 57 59 61 63 64 65 66 63 64 62 60 59 57 57
MIN/MAX RH 76 28 91 49 100
RH 42 54 64 76 73 48 29 28 38 60 73 90 87 60 48 60 78 93 96100100
WIND DIR S S SW SW SW SW SW SW S S S N N NE NE NE NE NE NE NE NE
WIND SPD 3 3 4 4 4 4 4 5 3 2 1 0 1 2 4 9 8 4 3 4 4
CLOUDS CL CL CL CL CL CL CL FW FW SC SC SC SC SC OV OV OV B2 B2 B2 OV
CLOUDS(%) 4 4 4 3 2 2 3 7 12 29 30 26 42 44 90 90 88 86 86 87 89
VSBY 10 10 10 10 10 10 10 10 10 10 10 10 10 10 10 9 3 2 2 3 4
POP 12HR 0 0 10 80 80
RAIN SHWRS O O O O NM NM SC
TSTMS SC SC SC IS
MIX HGT <1 <1 <1 <1 1 4 8 9 <1 <1 <1 <1 1 4 5 3 1
T WIND DIR S S SW SW SW NW SW SW S S SE E E NE NE NE NE
T WIND SPD 6 6 5 4 6 6 3 9 6 5 2 3 5 4 17 17 13
DISPERSION VP VP VP VP VP VP VP VP PR VP VP VP
ADI 3 3 3 2 10 31 33 81 3 3 1 2 9 21 71 50 12
MAX LVORI 2 2 3 4 3 1 1 1 2 3 3 6 5 2 1 1 4
STABILITY G G F F A A A B F G G G A A C C D
CEILING None None None None None None None 1000 700
STA PRES 29.48 29.48 29.47 29.38 29.40 29.43 29.47 29.49
Date 05/22Sat 05/23/26Sun 05/24/26Mon 05/25/26Tue 05/26/26
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 58 80 63 83 63 83 64 84
TEMP 65 70 62 62 75 75 67 66 81 76 68 66 81 77 69 67 82 78
DEWPT 61 62 61 62 67 68 65 66 69 69 66 66 69 70 66 67 68 69
RH 87 76 97100 76 79 93100 67 79 93100 67 79 90100 63 74
WIND SPD <15 <15 <15 <15 <15 <15 <15 <15 <15
AVG CLOUDS B2 B2 OV B2 OV B2 B2 B2 B2 B2 B2 B2 OV B2 B2 B2 B2 B2
POP 12HR 40 50 70 50 70 60 70 60 60
RAIN SHWRS SC SC SC SC SC NM SC SC SC NM NM SC SC NM NM SC SC NM
TSTMS IS IS SC SC SC SC SC IS 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