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EXPERIMENTAL...FIRE WEATHER POINT FORECAST MATRICES
NATIONAL WEATHER SERVICE Blacksburg VA
331 PM EDT Fri May 22 2026
NCZ005-230800-
RAWS 310540
36.38N 79.70W Elev. 858 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 57 67 60 78 63
TEMP 62 60 59 58 57 59 63 65 67 65 63 62 61 64 69 76 78 74 68 67 65 68
DEWPT 57 60 59 58 57 59 63 65 67 65 63 62 61 63 68 69 71 69 67 66 64 67
MIN/MAX RH 100 100 100 78 97
RH 84100100100100100100100100100100100100 97 97 79 79 84 97 97 97 97
WIND DIR NE NE NE NE NE NE NE NE NE NE NE NE N NE S S S S S S SW SW
WIND SPD 9 8 8 5 5 5 5 5 4 3 2 2 2 2 3 4 4 2 2 2 3 4
CLOUDS OV OV OV OV OV OV OV OV OV OV OV OV OV B2 OV OV OV OV OV B2 OV B2
CLOUDS(%) 97100100100100100100100 99100 98 99 94 84 90 93 93 90 90 82 92 87
VSBY 9 7 6 4 4 3 4 5 5 5 2 1
POP 12HR 100 100 90 80 80
RAIN SHWRS SC NM O NM O O NM O O SC O SC SC SC O O O O NM NM NM
TSTMS IS IS IS IS SC IS IS SC SC SC IS
MIX HGT 2 1 1 1 <1 <1 <1 1 1 <1 <1 <1 <1 <1 1 3 2 <1
T WIND DIR NE NE E E E E SE E NE NE E SE E NW SW SW S S
T WIND SPD 12 11 11 6 5 4 3 3 5 4 3 2 2 1 3 6 10 11
DISPERSION PR PR PR PR VP VP VP VP VP VP VP VP
ADI 26 10 10 6 5 6 4 5 8 4 2 1 1 1 7 20 29 5
MAX LVORI 4 7 7 8 9 9 9 9 8 9 10 10 10 8 6 3 3 5
STABILITY C D D D D D D D C D F F F B B C C F
CEILING 500 500 500 500 500 500 500 2400 2700
STA PRES 29.44 29.43 29.46 29.43 29.44 29.43 29.44 29.37
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 64 78 63 80 63 80 60 77
TEMP 77 75 68 68 76 73 68 67 79 75 68 67 79 74 66 64 75 72
DEWPT 71 71 68 68 72 69 67 67 70 69 66 66 67 67 63 62 62 62
RH 82 87100100 87 87 97100 74 82 93 97 67 79 90 93 64 71
WIND SPD <15 <15 <15 <15 <15 <15 <15 <15 <15
AVG CLOUDS B2 OV OV B2 OV OV B2 B2 B2 B2 B2 B1 B2 B1 B1 B1 B2 B1
POP 12HR 90 90 90 70 80 30 40 30 40
RAIN SHWRS NM O O O NM O NM SC SC O SC IS IS SC SC IS SC SC
TSTMS IS SC SC IS NM 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
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