National Weather Service United States Department of Commerce

Frigid Airmass to Bring Significantly Colder Temperatures; Snow Continues Downwind of the Great Lakes

A frigid cold airmass will bring significantly colder weather across the eastern two thirds of the country early this week. Record low temperatures are expected in the Southeast by Tuesday morning. Moderate to heavy lake effect snow will continue downwind of the Great Lakes through Monday. Several inches of snow accumulation is expected, including in portions of the Chicago Metro Read More >

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EXPERIMENTAL...FIRE WEATHER POINT FORECAST MATRICES
NATIONAL WEATHER SERVICE Blacksburg VA
831 PM EST Sun Nov 9 2025

NCZ003-100900-
RAWS 310301
36.48N  80.86W Elev. 1300 ft
831 PM EST Sun Nov 9 2025

Date           11/09/25      Mon 11/10/25            Tue 11/11/25            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
EST 3hrly     16 19 22 01 04 07 10 13 16 19 22 01 04 07 10 13 16 19 22 01 04 07

MIN/MAX TEMP                 36          41          23          45          28
TEMP                47 42 39 36 38 40 37 29 28 27 25 24 35 42 44 37 31 30 32 34
DEWPT               35 31 28 24 22 18 16 16 16 14 12 12 14 14 17 18 17 17 18 20
MIN/MAX RH                   64          40          61          30          60
RH                  63 65 64 61 52 41 42 58 60 57 57 60 41 31 33 46 56 58 56 56
WIND DIR            NW NW NW NW NW NW NW NW NW NW NW  W  W  W  W SW SW  W  W  W
WIND SPD            11 11 10  8 10 10 11  9 10 10 10 10 10  9  6  2  2  2  3  5
WIND GUST           25 24 24 20 21       23 25 25 26 24 23                13   
CLOUDS              B1 FW FW FW FW SC SC SC B1 FW FW FW FW FW FW FW FW FW FW FW
CLOUDS(%)           56 20 14 14 15 37 31 31 55 20 13 11  7  9  8 14 19 17 17 13
VSBY                10 10 10 10 10 10 10 10 10 10 10                           
POP 12HR                     10           5          10           0           0
MIX HGT              2  1  1  1  4  6  5  2  2  3  1  1  4  5  4 <1            
T WIND DIR          NW NW NW NW NW NW NW NW NW NW NW NW  W  W SW SW            
T WIND SPD          26 32 26 19 24 19 24 26 35 37 31 26 20 16 17 11            
DISPERSION          FR FR FR             PR FR FR FR             VP VP VP VP   
ADI                 30 22 18 29 93 85 99 18 48 25 21 38 75 65 81  5            
MAX LVORI            3  3  3  3  1  1  1  2  1  2  2  1  1  1  1  2            
STABILITY            D  E  E  B  C  C  C  E  D  E  E  C  C  C  B  G            
CEILING                    None  None  None  None  None  None  None  None      
STA PRES                  27.97 28.03 28.05 28.11 28.19 28.23 28.18            


Date           11/12Thu 11/13/25Fri 11/14/25Sat 11/15/25Sun 11/16/25
UTC 6hrly     18 00 06 12 18 00 06 12 18 00 06 12 18 00 06 12 18 00
EST 6hrly     13 19 01 07 13 19 01 07 13 19 01 07 13 19 01 07 13 19

MAX/MIN TEMP       59      37      60      35      66      41      66      43      64
TEMP          58 47 42 38 59 46 39 36 63 53 44 44 66 54 47 44 62 56
DEWPT         33 37 36 32 31 33 30 28 35 38 38 38 46 46 44 43 49 48
RH            39 68 79 79 34 60 70 72 35 57 79 79 48 74 89 96 62 74
WIND SPD          <15     <15     <15     <15     <15     <15     <15     <15     <15
AVG CLOUDS    FW FW FW SC SC B1 SC SC FW FW FW SC SC SC SC SC B1 B1
POP 12HR            0       0       0       0       0       5       0       5      20
RAIN                                                           S  S

$$


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