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EXPERIMENTAL...FIRE WEATHER POINT FORECAST MATRICES
NATIONAL WEATHER SERVICE Blacksburg VA
801 AM EDT Fri May 22 2026
VAZ024-222000-
RAWS 441631
37.63N 79.51W Elev. 865 ft
801 AM EDT Fri May 22 2026
Date Fri 05/22/26 Sat 05/23/26 Sun 05/24/26
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 65 51 68 56 81
TEMP 60 63 64 62 58 57 55 54 60 63 66 65 63 60 60 60 70 78 80 75
DEWPT 59 59 59 57 56 55 54 54 59 61 62 61 61 60 60 60 66 68 70 69
MAX/MIN RH 82 100 85 100 71
RH 96 87 84 84 93 93 96100 96 93 87 87 93100100100 87 71 72 82
WIND DIR E E E E E E E E E E E E N N N N N S S S
WIND SPD 3 4 4 3 3 2 2 2 2 2 2 1 0 0 0 0 0 2 3 1
WIND GUST 14 13
CLOUDS OV OV OV OV OV OV B2 OV B2 B2 B2 OV OV B2 OV B2 B2 B1 B1 B2
CLOUDS(%) 92 93 94 95 92 95 85 93 82 83 84 93 93 85 89 81 76 69 69 79
VSBY 2 3 3 3 1 2 3 2 2 2 3 3 2 2
POP 12HR 100 100 100 90 50
RAIN SHWRS O O O O NM NM NM O NM NM NM O O SC SC IS IS SC SC NM
TSTMS SC SC SC SC IS
MIX HGT 1 1 1 1 1 1 1 1 1 1 1 1 <1 <1 <1 <1 1 2 2 <1
T WIND DIR E E E E NE NE NE NE E NE NE NE NE N NW NW SW SW S S
T WIND SPD 13 11 13 11 10 9 9 9 8 6 5 4 3 2 1 1 2 6 8 9
DISPERSION VP VP VP VP VP VP VP VP VP
ADI 25 22 24 5 5 4 4 13 12 13 9 2 2 1 1 1 3 18 24 4
MAX LVORI 5 4 4 5 6 6 9 5 7 5 5 6 7 10 10 10 6 3 3 4
STABILITY B C C F F F F B B B B F F F F B B B B F
CEILING 800 400 400 400 900 700 400 400 900 3600
STA PRES 28.70 28.68 28.70 28.70 28.71 28.67 28.67 28.65 28.65 28.60
Date Mon 05/25/26Tue 05/26/26Wed 05/27/26Thu 05/28/26
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 62 83 63 80 63 82 62 83
TEMP 67 63 82 76 69 66 78 76 68 65 81 77 68 65 82 77
DEWPT 65 63 71 70 66 65 70 69 65 64 69 70 65 63 66 67
RH 93100 69 82 90 97 76 79 90 97 67 79 90 93 58 71
WIND SPD <15 <15 <15 <15 <15 <15 <15 <15
AVG CLOUDS B2 B2 B2 OV B2 B2 B2 OV B2 B2 B2 B2 B2 B1 B1 B1
POP 12HR 70 80 80 80 50 70 30 40
RAIN SHWRS NM SC SC O O SC NM O SC SC NM NM SC IS SC SC
TSTMS IS SC IS SC 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