National Weather Service United States Department of Commerce

Print This Forecast (Printer-Friendly)

EXPERIMENTAL...FIRE WEATHER POINT FORECAST MATRICES
NATIONAL WEATHER SERVICE Blacksburg VA
231 PM EDT Wed May 13 2026

NCZ005-140800-
RAWS 310540
36.38N  79.70W Elev. 858 ft
231 PM EDT Wed May 13 2026

Date           05/13/26      Thu 05/14/26            Fri 05/15/26            Sat
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                 51          68          46          77          52
TEMP          77 72 62 58 53 53 61 65 67 62 52 48 46 51 65 73 76 70 59 55 52 57
DEWPT         49 51 54 54 50 47 42 41 40 40 39 40 40 42 42 41 42 47 45 45 45 47
MIN/MAX RH                   91          37          80          28          77
RH            37 48 75 86 89 80 49 41 37 44 61 74 79 71 43 31 30 44 60 69 77 69
WIND DIR      SW  W  W NW NW NW NW NW NW NW NW  W  W  W NW  W  W SW SW SW SW SW
WIND SPD       9  3  3  4  5  9 10 11 11  6  4  4  4  4  5  5  4  2  2  2  3  5
CLOUDS        SC B1 B1 SC FW CL CL FW FW FW FW CL CL CL FW FW FW FW FW FW FW SC
CLOUDS(%)     33 58 65 43 21  2  2 25 10  7  6  5  4  3  8 16  8 25 11 19 24 33
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                     40           0           0           0           0
RAIN SHWRS       SC SC                                                         
MIX HGT        7 <1 <1 <1 <1  2  5  7  7 <1 <1 <1 <1  1  5  6  6 <1            
T WIND DIR    SW SW SW NW NW NW NW NW NW NW NW  W  W NW NW  W  W  S            
T WIND SPD    12  9  3 13 13 20 18 17 20 11  3  4  4 12 13 11 11  1            
DISPERSION       VP VP VP PR             PR VP VP VP             VP VP VP VP   
ADI           96  4  2  6  6 61107128 97  5  2  2  2 19 86 85 82  1            
MAX LVORI      1  2  4  5  5  3  1  1  1  2  3  3  5  3  1  1  1  2            
STABILITY      B  F  F  F  F  B  B  B  C  F  F  G  F  A  A  A  A  G            
CEILING        None  5200  None  None  None  None  None  None  None  None      
STA PRES      29.15 29.10 29.11 29.17 29.18 29.26 29.28 29.32 29.28            


Date           05/16Sun 05/17/26Mon 05/18/26Tue 05/19/26Wed 05/20/26
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       85      61      87      63      88      65      87      66      87
TEMP          83 80 66 65 86 80 67 66 88 82 69 68 87 82 70 69 87 81
DEWPT         52 56 55 58 58 60 60 62 61 62 61 63 60 61 61 64 61 62
RH            34 44 68 78 39 51 78 87 40 51 76 84 40 49 73 84 42 53
WIND SPD          <15     <15     <15     <15     <15     <15     <15     <15     <15
AVG CLOUDS    SC SC SC SC SC SC FW FW FW FW FW FW FW FW SC SC SC B1
POP 12HR            5       5       5       5       5       0       5      10      40
RAIN SHWRS                                                       SC
TSTMS                                                            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