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EXPERIMENTAL...FIRE WEATHER POINT FORECAST MATRICES
NATIONAL WEATHER SERVICE Blacksburg VA
501 PM EDT Fri May 22 2026
VAZ018-230800-
RAWS 444002
37.56N 80.18W Elev. 2702 ft
501 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 62 59 78 64
TEMP 54 54 54 53 54 57 59 60 62 61 60 60 61 70 78 76 71 68 65 64 67
DEWPT 52 52 51 50 50 53 59 60 59 59 58 58 58 64 66 68 66 64 61 61 62
MIN/MAX RH 92 86 99 67 88
RH 93 93 90 89 86 86100100 90 93 93 93 90 81 67 76 84 87 87 90 84
WIND DIR E E SE E SE E E E E E N N N S SE SE SE N N N N
WIND SPD 5 5 5 5 5 4 3 3 2 2 0 0 0 1 2 2 1 0 0 0 0
WIND GUST 16 16 12
CLOUDS OV OV OV OV OV OV OV OV OV OV OV OV B2 B2 OV OV B2 B2 B2 B2 B2
CLOUDS(%) 100100100100100100100100100 92 91 89 80 75 89 89 71 71 75 85 85
VSBY 1 1 1 2 1 2 3 3 3 2 2 3 3 6 10 10 10
POP 12HR 100 100 80 80 60
RAIN C D D D D
RAIN SHWRS O NM NM O O SC IS IS O O NM NM SC SC NM
TSTMS SC SC IS
Obvis PF PF PF
MIX HGT <1 <1 <1 <1 1 1 1 <1 <1 <1 <1 <1 <1 2 3 1 <1
T WIND DIR E E E E E E E E E E NE NE N SW S S S
T WIND SPD 9 10 10 9 9 6 6 5 4 2 2 1 1 8 4 10 11
DISPERSION PR PR PR PR VP VP VP VP VP VP VP VP
ADI 8 9 9 8 12 9 9 7 4 1 1 1 1 19 17 19 5
MAX LVORI 4 5 5 5 5 5 6 6 6 7 7 8 6 3 3 3 5
STABILITY D D D D D B D B D F F F B B B B F
CEILING 100 100 200 100 200 100 600 2400 1600
STA PRES 27.95 27.94 27.98 27.95 27.96 27.94 27.94 27.88
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 80 63 73 63 78 63 78 60 76
TEMP 78 72 66 65 71 69 66 66 74 72 66 65 76 72 64 62 73 69
DEWPT 68 65 62 62 66 64 61 61 65 64 59 59 61 61 57 55 56 56
RH 71 79 87 90 84 84 84 84 74 76 78 81 60 68 78 78 55 63
WIND SPD <15 <15 <15 <15 <15 <15 <15 <15 <15
AVG CLOUDS B2 OV B2 B2 OV OV B2 B2 B2 B2 B1 B1 B1 B1 B1 B1 B1 B1
POP 12HR 90 80 90 50 80 30 40 20 30
RAIN SHWRS NM O O NM O O SC SC O O SC IS SC SC IS IS SC SC
TSTMS SC IS IS SC IS 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