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EXPERIMENTAL...FIRE WEATHER POINT FORECAST MATRICES
NATIONAL WEATHER SERVICE Blacksburg VA
331 PM EDT Fri May 22 2026
VAZ012-230800-
RAWS 447502
37.01N 81.18W Elev. 2540 ft
331 PM EDT Fri May 22 2026
Date 05/22/26 Sat 05/23/26 Sun 05/24/26 Mon
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 53 69 56 78 57
TEMP 64 60 57 55 54 57 63 67 69 65 61 59 57 59 68 75 78 72 63 60 58 61
DEWPT 56 56 55 54 54 56 60 62 63 62 61 59 57 58 62 62 65 64 62 59 57 60
MIN/MAX RH 100 79 100 64 97
RH 75 87 93 96100 96 90 84 81 90100100100 96 81 64 64 76 97 96 96 97
WIND DIR SE SE E SE SE SE SE SE SE SE SE SE SE S S S S S N N N N
WIND SPD 3 4 4 3 3 3 3 4 4 3 2 1 1 1 1 2 1 1 0 0 0 0
CLOUDS OV OV OV OV OV OV OV OV OV OV OV B2 B2 B1 B1 OV OV B1 B2 B2 B2 B2
CLOUDS(%) 94100100 99100100 88 92 90 94 88 87 79 56 61 93 93 69 76 71 73 84
VSBY 2 2 2 2 2 3 5 7 5 5 4 3
POP 12HR 100 90 60 80 50
RAIN SHWRS SC SC O NM O O NM O O NM IS SC SC O O SC SC SC SC O
TSTMS IS IS IS SC SC IS IS SC SC IS
MIX HGT 1 1 <1 <1 <1 <1 1 2 2 <1 <1 <1 <1 <1 2 3 3 <1
T WIND DIR SE E E SE SE SE SE S S SE SE S S S SW SW S S
T WIND SPD 10 8 10 4 8 5 9 18 10 11 6 5 4 8 6 8 10 9
DISPERSION VP VP VP VP VP VP VP VP VP VP VP VP
ADI 18 7 9 2 7 6 15 36 22 5 3 3 2 10 21 33 39 4
MAX LVORI 3 5 6 9 8 8 4 3 3 5 9 9 9 6 3 3 1 4
STABILITY B D D F D D B C C F F F F B B B B F
CEILING 200 200 200 500 200 200 700 2200 1700
STA PRES 27.37 27.36 27.39 27.37 27.39 27.39 27.40 27.34
Date 05/25Tue 05/26/26Wed 05/27/26Thu 05/28/26Fri 05/29/26
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 78 57 73 57 75 57 75 54 74
TEMP 73 71 62 61 70 69 61 61 72 70 62 60 73 70 60 58 71 68
DEWPT 64 65 61 60 65 64 61 61 64 64 59 59 62 61 57 56 57 56
RH 73 81 97 97 84 84100100 76 81 90 96 68 73 90 93 61 65
WIND SPD <15 <15 <15 <15 <15 <15 <15 <15 <15
AVG CLOUDS B2 OV B2 B2 OV OV B2 B2 B2 OV B1 B1 B2 B2 B1 B1 B1 B1
POP 12HR 90 70 90 50 90 30 70 30 50
RAIN SHWRS O O NM SC O O SC SC O O SC SC SC NM SC SC SC SC
TSTMS IS SC IS IS SC IS 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