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 Tue Apr 28 2026

NCZ005-282000-
RAWS 310540
36.38N  79.70W Elev. 858 ft
801 AM EDT Tue Apr 28 2026

Date             Tue 04/28/26            Wed 04/29/26            Thu 04/30/26
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                 70          55          73          52          70
TEMP                59 66 70 67 60 59 57 58 63 69 72 69 62 56 52 54 63 68 70 63
DEWPT               51 53 54 55 55 55 56 58 62 63 63 62 57 53 50 48 45 40 37 37
MAX/MIN RH                   56         100          72          91          31
RH                  75 63 57 65 84 87 96100 97 81 73 78 84 90 93 80 52 36 30 38
WIND DIR             S SW SW  S SW  S  S  S  S  S SW  W NW NW NW NW NW NW NW NW
WIND SPD             5  8  8  3  3  3  3  4  8 10 10  5  5  5  6  8 10 10 10  5
CLOUDS              B2 B2 B1 SC SC B1 B2 OV OV OV OV B1 B1 SC SC SC SC FW FW FW
CLOUDS(%)           83 84 52 33 41 62 75 98 98 98 98 59 59 47 47 33 26 24 10 24
VSBY                 7 10 10 10 10  8 10 10  6  5  7 10 10 10 10 10 10 10 10 10
POP 12HR                     60          30         100          40          10
RAIN SHWRS          IS                    O  O  O  O SC SC                     
TSTMS                                          SC SC                           
MIX HGT              2  3  3 <1 <1 <1 <1 <1  2  2  3 <1 <1 <1 <1  1  5  8  9 <1
T WIND DIR          SW SW SW SW SW SW  S  S  S  S SW SW NW NW NW NW NW NW NW NW
T WIND SPD          14 20 13 12 10  4  3  9 12 16 19  8 16 13 13 23 21 16 16 11
DISPERSION                   VP VP VP VP             PR PR PR PR             PR
ADI                 32 65 48  6  5  2  2  7 26 46 64  5 11  9  9 40129127143  5
MAX LVORI            3  1  1  3  5  6  8  8  4  3  3  4  4  5  5  3  1  1  1  2
STABILITY            C  C  C  G  F  F  F  C  C  C  C  E  E  E  E  B  B  B  B  F
CEILING              3400  None  None  1500  1300  1700  3100  None  None  None
STA PRES            29.41 29.33 29.30 29.21 29.11 28.96 29.04 29.12 29.17 29.16


Date          Fri 05/01/26Sat 05/02/26Sun 05/03/26Mon 05/04/26
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       44      70      48      60      39      67      43      75
TEMP          47 48 67 62 52 48 56 55 45 44 64 61 48 48 72 68
DEWPT         37 38 38 42 44 45 45 42 36 35 33 35 36 38 42 44
RH            68 68 34 48 74 89 66 61 70 70 31 38 63 68 34 42
WIND SPD          <15     <15     <15     <15     <15     <15     <15     <15
AVG CLOUDS    SC SC B1 B1 B2 B2 B2 B2 B1 SC FW FW FW FW CL FW
POP 12HR            5      20      50      50      10       5       5      10
RAIN SHWRS             IS SC SC SC 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