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EXPERIMENTAL...FIRE WEATHER POINT FORECAST MATRICES
NATIONAL WEATHER SERVICE Blacksburg VA
531 AM EDT Tue May 19 2026
VAZ024-192000-
RAWS 441631
37.63N 79.51W Elev. 865 ft
531 AM EDT Tue May 19 2026
Date Tue 05/19/26 Wed 05/20/26 Thu 05/21/26
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 96 67 94 63 76
TEMP 69 86 94 94 85 78 72 68 70 88 94 91 81 74 70 66 64 71 74 71 65
DEWPT 60 63 60 61 60 57 55 55 58 63 60 62 64 65 64 64 63 64 62 60 56
MAX/MIN RH 33 69 33 96 65
RH 73 46 32 34 43 48 55 63 66 43 32 38 56 74 81 93 97 79 66 68 73
WIND DIR N W SW SW SW SW SW SW W W W W NW N N N NE E E E E
WIND SPD 0 2 4 5 3 3 2 1 1 3 5 5 2 1 0 1 2 3 4 4 4
WIND GUST 13 14
CLOUDS SC SC SC SC SC SC B1 SC FW FW B1 B1 B1 B1 B2 B2 OV OV B2 B2 OV
CLOUDS(%) 37 29 31 42 45 36 54 28 16 11 61 61 67 67 77 77 92 92 85 85 90
VSBY 10 10 10 10 10 10 10 10 10 10 10 10 9 8 6 1 2 8 8 8 10
POP 12HR 5 5 40 70 90
RAIN SHWRS SC SC SC SC NM NM O O O O O
TSTMS SC SC SC IS IS IS IS
MIX HGT <1 4 7 7 <1 <1 <1 <1 <1 4 8 5 <1 <1 <1 <1 1 1 2 2 1
T WIND DIR W W SW SW S S SW W SW W W W NW N N N NE NE NE NE NE
T WIND SPD 2 8 11 12 5 6 4 3 2 17 11 10 3 2 3 4 9 11 11 8 6
DISPERSION VP VP VP VP VP VP VP VP VP
ADI 2 42 99107 3 3 2 2 2 97 58 42 2 1 2 2 15 22 26 17 5
MAX LVORI 3 1 1 1 2 2 3 3 3 1 1 1 3 3 5 6 5 3 3 3 3
STABILITY A A A A F G F G A A C C F F F F B B C C E
CEILING None None None None None 5000 1500 1400 2600 1400
STA PRES 28.69 28.63 28.60 28.60 28.60 28.54 28.58 28.60 28.68 28.69
Date Fri 05/22/26Sat 05/23/26Sun 05/24/26Mon 05/25/26
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 53 67 55 75 61 82 62 82
TEMP 59 55 64 64 60 58 71 72 66 63 80 76 67 64 80 76
DEWPT 54 54 58 55 56 57 63 64 62 62 66 67 64 63 66 66
RH 83 96 81 73 87 96 76 76 87 97 62 74 90 97 62 71
WIND SPD <15 <15 <15 <15 <15 <15 <15 <15
AVG CLOUDS OV OV B2 B2 B2 B2 B2 B2 B2 B2 B2 B2 B2 B2 B2 B2
POP 12HR 90 80 70 80 60 70 40 60
RAIN SHWRS O O O SC NM SC SC O NM IS SC NM SC IS SC NM
TSTMS IS SC 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