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EXPERIMENTAL...FIRE WEATHER POINT FORECAST MATRICES
NATIONAL WEATHER SERVICE Blacksburg VA
331 PM EDT Fri May 22 2026
VAZ024-230800-
RAWS 441631
37.63N 79.51W Elev. 865 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 52 64 56 80 62
TEMP 61 58 56 54 53 55 60 63 64 62 59 58 57 59 69 78 80 75 69 67 66 63
DEWPT 53 56 56 54 53 54 58 60 62 61 59 58 57 58 65 66 69 68 66 65 64 62
MIN/MAX RH 100 92 100 68 97
RH 75 93100100100 96 93 90 93 97100100100 96 87 67 69 79 90 93 93 97
WIND DIR E E E E E E E E E E N N N N N S S S N N N N
WIND SPD 4 3 3 3 2 2 2 2 2 1 0 0 0 0 0 2 2 1 0 0 0 0
WIND GUST 14 13
CLOUDS OV OV OV OV OV OV OV OV OV OV OV OV OV B2 B2 B2 B2 B2 B2 B2 B2 B2
CLOUDS(%) 96 99100100100100 99 96 96 99 96 93 88 82 80 78 78 78 78 74 82 80
VSBY 4 3 2 2 2 1 2 3 4 3 2 2
POP 12HR 100 100 90 60 70
RAIN SHWRS O SC NM O O O O O NM SC NM NM SC IS IS NM NM NM NM SC SC NM
TSTMS IS IS IS IS SC IS
MIX HGT 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 E E NE NE NE NE E N NE N N S S S
T WIND SPD 10 8 10 10 9 6 5 8 5 5 2 3 2 2 1 4 9 9
DISPERSION VP VP VP VP VP VP VP VP VP VP VP VP
ADI 16 4 9 9 8 9 8 11 8 3 1 2 1 2 2 14 26 4
MAX LVORI 3 6 8 8 8 8 6 5 6 9 10 10 10 8 6 3 3 4
STABILITY C F D D D D B B B F F F F B B B B F
CEILING 500 400 500 700 400 400 400 2300 2600
STA PRES 28.70 28.69 28.73 28.70 28.69 28.67 28.68 28.60
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 82 62 78 62 82 61 82 58 80
TEMP 79 75 68 65 75 74 67 65 79 76 67 64 81 76 65 61 77 73
DEWPT 69 69 66 64 68 68 64 64 67 68 63 61 64 65 60 57 59 61
RH 72 82 93 97 79 82 90 97 67 76 87 90 56 69 84 87 54 66
WIND SPD <15 <15 <15 <15 <15 <15 <15 <15 <15
AVG CLOUDS B2 B2 B2 B2 OV OV B2 B2 B2 B2 B1 B1 B1 B1 SC B1 SC B1
POP 12HR 80 80 90 50 80 20 40 20 30
RAIN SHWRS NM O O O O O SC SC NM O IS IS SC SC IS IS IS SC
TSTMS SC IS SC IS SC SC 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