National Weather Service United States Department of Commerce

Print This Forecast (Printer-Friendly)

EXPERIMENTAL...FIRE WEATHER POINT FORECAST MATRICES
NATIONAL WEATHER SERVICE Blacksburg VA
801 AM EDT Sun May 17 2026

VAZ024-172000-
RAWS 441631
37.63N  79.51W Elev. 865 ft
801 AM EDT Sun May 17 2026

Date             Sun 05/17/26            Mon 05/18/26            Tue 05/19/26
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                 92          63          93          65          94
TEMP                82 90 90 82 73 68 64 67 85 92 92 84 76 69 65 68 85 92 93 86
DEWPT               64 62 63 64 61 60 59 61 65 63 62 61 59 59 58 60 63 60 59 58
MAX/MIN RH                   39          85          37          79          32
RH                  55 39 41 55 66 76 84 81 51 38 37 46 56 70 78 76 48 34 32 39
WIND DIR             N SW  S  S  N  N  N  N SW  S  S  S  S SW SW  N SW  S  S  S
WIND SPD             0  3  3  1  0  0  0  0  2  5  6  3  3  2  1  0  2  5  8  4
WIND GUST                                         18 14                   18 17
CLOUDS              CL FW FW FW FW FW FW FW CL FW CL FW FW FW FW FW FW FW FW FW
CLOUDS(%)            5  7 16 10 12  8  9 13  2 12  5  7 13 22 21 22 11 14 17 22
VSBY                10 10 10 10 10 10  8 10 10 10 10 10 10 10 10 10  9 10 10 10
POP 12HR                      5           5           0           0           0
MIX HGT              4  6  6 <1 <1 <1 <1 <1  3  6  7 <1 <1 <1 <1 <1  4  7  8 <1
T WIND DIR          NW  S SW SW  S SW NW NW  W  S  S  S SW SW  W  W NW SW SW SW
T WIND SPD           2  6 13  8  2  2  2  1  3  5  9  4  5  3  2  2  6  6 11  4
DISPERSION                   VP VP VP VP             VP VP VP VP             VP
ADI                 11 53103  4  1  1  1  1 15 44 67  2  3  2  1  2 34 61 96  2
MAX LVORI            2  1  1  3  3  3  5  5  2  1  1  2  3  3  4  3  1  1  1  2
STABILITY            A  A  A  G  G  G  G  A  A  A  B  G  G  G  G  A  A  A  B  F
CEILING              None  None  None  None  None  None  None  None  None  None
STA PRES            28.64 28.59 28.65 28.69 28.73 28.68 28.70 28.70 28.72 28.64


Date          Wed 05/20/26Thu 05/21/26Fri 05/22/26Sat 05/23/26
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       66      93      61      76      54      70      54      74
TEMP          70 69 92 82 70 64 74 70 61 57 68 66 60 57 72 70
DEWPT         56 59 61 65 63 60 60 57 53 52 56 57 55 56 62 62
RH            61 70 36 56 78 87 62 63 75 83 65 73 84 96 71 76
WIND SPD          <15     <15     <15     <15     <15     <15     <15     <15
AVG CLOUDS    FW FW FW B1 B1 B1 B2 B2 B2 B2 B2 B2 B2 B2 B2 B2
POP 12HR            0      50      50      70      60      60      50      50
RAIN SHWRS             SC SC SC NM NM NM NM NM NM SC SC SC SC
TSTMS                  SC SC       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