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EXPERIMENTAL...FIRE WEATHER POINT FORECAST MATRICES
NATIONAL WEATHER SERVICE Blacksburg VA
401 PM EDT Sun May 17 2026
NCZ006-180800-
RAWS 310801
36.37N 79.29W Elev. 580 ft
401 PM EDT Sun May 17 2026
Date 05/17/26 Mon 05/18/26 Tue 05/19/26 Wed
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 66 94 65 95 66
TEMP 91 83 73 70 67 72 84 92 92 85 76 72 67 70 84 93 93 86 76 72 68 71
DEWPT 61 63 62 62 64 66 67 63 60 61 61 62 62 63 63 58 56 58 58 60 61 63
MIN/MAX RH 92 35 86 28 83
RH 37 51 68 76 90 81 57 38 34 45 60 71 84 78 49 31 29 39 54 66 78 76
WIND DIR S S S S SW SW SW SW S S S S SW SW SW SW S S S S SW SW
WIND SPD 5 2 2 3 3 3 4 6 6 3 3 4 3 4 4 6 8 3 4 4 4 5
WIND GUST 14
CLOUDS CL FW FW FW CL CL CL FW CL FW FW FW FW FW FW FW FW SC FW FW FW FW
CLOUDS(%) 5 12 8 7 4 3 3 8 4 10 15 16 21 19 15 11 15 28 25 16 9 14
VSBY 10 10 10 10 10 10 10 10 10 10 10 10 10 10 10 10 10 10 10 10 10 10
POP 12HR 0 0 0 0 0
MIX HGT 7 <1 <1 <1 <1 1 4 6 7 <1 <1 <1 <1 1 3 6 8 <1
T WIND DIR SW S S S S SW SW SW SW S SW SW S SW W W SW S
T WIND SPD 8 5 4 4 4 8 11 11 12 6 6 5 5 10 11 12 13 5
DISPERSION VP VP VP VP VP VP VP VP VP VP VP VP
ADI 69 3 2 2 2 11 54 80 94 3 3 3 3 16 51 88114 3
MAX LVORI 1 2 3 4 6 5 1 1 1 2 3 3 5 3 1 1 1 2
STABILITY A G G G G A A B B G G F G A A B B G
CEILING None None None None None None None None None
STA PRES 29.50 29.57 29.61 29.55 29.58 29.59 29.59 29.50
Date 05/20Thu 05/21/26Fri 05/22/26Sat 05/23/26Sun 05/24/26
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 96 65 79 56 72 58 80 63 84
TEMP 94 87 71 67 77 71 61 57 68 70 62 60 77 75 66 65 81 77
DEWPT 58 63 65 65 61 59 58 57 60 62 60 60 66 67 65 65 68 69
RH 30 45 81 93 58 66 90100 76 76 93100 69 76 97100 65 76
WIND SPD <15 <15 <15 <15 <15 <15 <15 <15 <15
AVG CLOUDS FW SC B1 B1 B1 B2 B2 B2 B2 B2 OV B2 B2 B2 B2 B2 B2 B2
POP 12HR 20 40 70 80 70 60 60 60 70
RAIN SHWRS IS SC SC SC NM O NM NM NM NM SC SC NM NM SC SC NM
TSTMS IS SC SC SC IS 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