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EXPERIMENTAL...FIRE WEATHER POINT FORECAST MATRICES
NATIONAL WEATHER SERVICE Blacksburg VA
231 AM EDT Tue May 5 2026
NCZ003-060800-
RAWS 310301
36.48N 80.86W Elev. 1300 ft
231 AM EDT Tue May 5 2026
Date 05/04/26 Tue 05/05/26 Wed 05/06/26 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 48 78 55 76 58
TEMP 51 55 67 73 77 70 65 61 58 58 66 72 75 72 66 62 59 60
DEWPT 41 43 45 43 44 45 47 50 52 54 59 61 63 63 62 62 59 60
MIN/MAX RH 74 31 90 65 100
RH 68 64 45 34 31 41 52 67 80 86 78 68 66 73 87100100100
WIND DIR W N S S S S S S S S S SW SW SW SW SW SW W
WIND SPD 1 0 6 12 13 5 5 5 5 5 8 9 6 3 2 2 2 2
WIND GUST 23 24 18 18 19 19 17
CLOUDS CL FW FW SC SC B1 SC B1 B2 OV OV OV OV OV OV OV OV OV
CLOUDS(%) 4 6 12 29 49 52 50 62 80 96 90 90 90 96 96 96 96 88
VSBY 10 10 10 10 10 10 10 10 10 10 10 10 10 10 10 10 10 10
POP 12HR 0 0 40 60 90
RAIN SHWRS IS IS SC SC NM NM O O O O O
TSTMS IS SC SC IS SC IS IS
MIX HGT <1 <1 4 6 7 1 <1 <1 1 2 2 3 4 <1
T WIND DIR SW SW SW S S S S S S S SW SW W SW
T WIND SPD 4 3 21 24 25 13 10 13 13 12 18 20 18 11
DISPERSION VP PR PR PR PR VP VP VP VP
ADI 2 3100111 89 12 7 9 9 27 48 69 67 5
MAX LVORI 3 3 1 1 1 2 3 3 4 4 3 3 1 3
STABILITY G A B C D D E E E C C C C F
CEILING None None None None 1700 400 2400 9800
STA PRES 28.09 28.10 28.04 28.04 27.99 28.0 27.99
Date 05/07Fri 05/08/26Sat 05/09/26Sun 05/10/26Mon 05/11/26
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 72 42 68 45 75 47 79 56 76
TEMP 68 62 49 47 64 62 49 50 71 68 52 52 76 73 60 59 72 68
DEWPT 59 51 42 39 42 46 45 46 50 49 47 47 52 55 55 56 59 53
RH 73 67 77 74 45 56 86 86 47 51 83 83 43 53 84 90 64 59
WIND SPD <15 <15 <15 <15 <15 <15 <15 <15 <15
AVG CLOUDS B2 B2 B1 SC SC SC SC SC SC B1 FW CL FW SC B1 B1 B2 B2
POP 12HR 80 30 20 20 30 5 20 40 70
RAIN SHWRS O NM SC IS IS IS IS SC IS SC SC NM NM
TSTMS IS 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
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