National Weather Service United States Department of Commerce

Print This Forecast (Printer-Friendly)

EXPERIMENTAL...FIRE WEATHER POINT FORECAST MATRICES
NATIONAL WEATHER SERVICE Blacksburg VA
101 AM EDT Tue May 12 2026

NCZ006-130800-
RAWS 310801
36.37N  79.29W Elev. 580 ft
101 AM EDT Tue May 12 2026

Date           05/11/26      Tue 05/12/26            Wed 05/13/26            Thu
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                 43          77          51          79          50
TEMP                   47 44 46 65 73 76 69 58 56 52 55 72 78 75 69 60 56 51 53
DEWPT                  46 43 46 48 44 43 45 44 44 45 49 53 52 55 58 58 56 51 49
MIN/MAX RH                  100          32          81          41         100
RH                     96 96100 54 35 31 42 59 64 77 80 51 40 50 68 93100100 86
WIND DIR                N  N  N  N  S  S  S  S  S  S SW SW SW SW SW SW  W  W NW
WIND SPD                0  0  0  0  3  4  3  3  5  4  4  9 10  9  3  2  2  3  4
WIND GUST                                                  21                  
CLOUDS                 SC B1 B2 CL FW CL FW CL FW CL CL FW B1 B1 B2 B2 SC FW FW
CLOUDS(%)              48 68 76  5  8  4  7  4  6  3  5 10 69 69 82 82 30 14  8
VSBY                    3  0  1 10 10 10 10 10 10 10 10 10 10 10 10 10 10 10 10
POP 12HR                      0           0           0          60          70
RAIN SHWRS                                                 IS SC NM SC         
TSTMS                                                         SC SC            
Obvis                   F  F  F                                                
MIX HGT                <1 <1 <1  3  7  7 <1 <1 <1 <1  1  5  7  4 <1            
T WIND DIR             SW  W  W  S SW SW  S  S  S SW SW SW SW SW SW            
T WIND SPD              1  2  1  2  4  9  4  4  8  8 17 20 20 21  5            
DISPERSION             VP VP             VP VP PR VP             VP VP VP VP   
ADI                     1  1  1  9 39 81  2  2  4  4 30115 99 85  3            
MAX LVORI              10 10 10  2  1  1  2  3  3  4  3  1  1  1  3            
STABILITY               G  F  A  A  A  A  G  G  F  F  A  B  C  C  F            
CEILING                   35000  None  None  None  None  None  3500   400      
STA PRES                  29.56 29.60 29.52 29.51 29.47 29.41 29.25            


Date           05/14Fri 05/15/26Sat 05/16/26Sun 05/17/26Mon 05/18/26
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       72      43      75      50      88      61      91      63      92
TEMP          69 62 47 47 71 68 54 56 85 80 66 65 89 83 69 67 91 85
DEWPT         43 43 43 43 42 48 46 50 54 58 56 59 58 60 59 61 60 61
RH            39 50 86 86 35 49 74 80 35 47 70 81 35 46 70 81 36 45
WIND SPD          <15     <15     <15     <15     <15     <15     <15     <15     <15
AVG CLOUDS    FW FW FW CL CL FW SC SC SC FW SC SC SC FW SC FW FW FW
POP 12HR            0       0       0       0       5      20       5       5      10
RAIN SHWRS                                  IS                     
TSTMS                                       IS                     

$$


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