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Hurricane Maria Forecast To Bring Impacts To East Coast

Hurricane Maria will approach the Mid-Atlantic coast early this week then finally shove eastward into the open Atlantic. Maria will likely not make landfall but will come close to portions of North Carolina midweek and could bring tropical storm force winds, locally heavy rain, storm surge, and very rough surf. Maria will create hazardous surf and rip currents for much of the East Coast this week. Read More >

Shreveport, LA

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NWS Shreveport Fire Weather Page

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Click here to access the Weather Activity Planner. This is an experimental planning tool that provides specific weather forecast information based on the official National Weather Service forecast. Users will select from a list of weather elements, input a criteria range for the selected element (i.e., temperature between 65 degrees F and 80 degrees F), and then select a location on the map. A graph will appear illustrating at what times(s) the weather element criteria is met for the selected location. Users may select up to six different elements at a time. This tool is not intended to replace a spot forecast.

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Latest Fire Weather Forecast (FWFSHV) 
000
FNUS54 KSHV 252106
FWFSHV

Fire Weather Planning Forecast for Southwest Arkansas...
Northwest Louisiana...East Texas...and Extreme Southeast Oklahoma
National Weather Service Shreveport LA
406 PM CDT Mon Sep 25 2017

.DISCUSSION...
This afternoon an upper level low continued over the Eastern
sections of the Four State Region with its center over South
Mississippi and Southeast Louisiana. Up to this time there
wes no ongoing convection under the Western section beneath
weak ridging aloft. The weak East and Southeast low level flow
and weak ridge aloft combined to produce slightly cooler daytime
highs along with drier air. With the low weakening and shifting
to the East the drier air will continue to hold over the fire
districts with lower relative humidity levels in the 40 to 50
percent range.  Still appears that we will not get much from
an approaching upper level trough and associated cold front
later in the work week with reference to rain. However
a cool down to occur. the lack of rainfall with the cold
front may lessen the longevity of the cooler airmass, as dry
soils and dry air will likely heat back up more quickly.

ARZ050-051-059-OKZ077-261045-
Sevier-Howard-Little River-McCurtain-
Including the cities of De Queen, Nashville, Mineral Springs,
Dierks, Ashdown, Idabel, and Broken Bow
406 PM CDT Mon Sep 25 2017

                      Tonight      Tue          Tue Night    Wed

CLOUD COVER           MClear       PCldy        PCldy        MCldy
PRECIP TYPE           None         Tstms        None         Tstms
CHANCE PRECIP (%)     0            20           0            20
TEMP (24H TREND)      66 (+1)      90 (+1)      67           90
RH % (24H TREND)      89 (-1)      44 (0)       92           50
20FTWND-AM(MPH)                    E  3                      NE  4
20FTWND-PM(MPH)       E  3         E  4         E  3         NE  4
PRECIP AMOUNT         0.00         0.01         0.00         0.03
PRECIP DURATION       0            1            0            1
MIXING HGT(M-MSL)                  2146                      1926
MIXING HGT(FT-MSL)                 7041                      6319
TRANSPORT WND (M/S)                N  0                      N  0
TRANSPORT WND (MPH)                N  0                      N  0
VENT RATE (M^2/S)                  0                         0
CATEGORY DAY                       1                         1
MIX HGT 500 TEMP(F)                77                        79
STABILITY CLASS       F            B            F            C

Remarks...None.

.FORECAST FOR DAYS 3 THROUGH 7...

.THURSDAY...Mostly cloudy with slight chance of showers and
thunderstorms. Lows in the upper 60s. Highs in the lower 80s.
North winds around 5 mph. Category Day Index is 1.
.FRIDAY...Mostly cloudy. Lows in the lower 60s. Highs in the
lower 80s. Northeast winds around 5 mph.
.SATURDAY...Partly cloudy. Lows in the upper 50s. Highs in the
lower 80s. Northeast winds around 5 mph.
.SUNDAY...Mostly clear. Lows in the mid 50s. Highs in the lower
80s. East winds around 5 mph.
.MONDAY...Partly cloudy. Slight chance of showers and
thunderstorms. Lows in the upper 50s. Highs in the lower 80s.
North winds around 5 mph.

$$

ARZ060-061-070>073-261045-
Hempstead-Nevada-Miller-Lafayette-Columbia-Union-
Including the cities of Hope, Prescott, Texarkana, Stamps,
Lewisville, Bradley, Magnolia, and El Dorado
406 PM CDT Mon Sep 25 2017

                      Tonight      Tue          Tue Night    Wed

CLOUD COVER           MClear       PCldy        PCldy        MCldy
PRECIP TYPE           None         Tstms        None         Tstms
CHANCE PRECIP (%)     0            20           0            20
TEMP (24H TREND)      67 (+2)      90 (0)       68           90
RH % (24H TREND)      90 (0)       45 (+2)      92           48
20FTWND-AM(MPH)                    LGT/VAR                   NE  4
20FTWND-PM(MPH)       E  3         E  4         NE  3        NE  4
PRECIP AMOUNT         0.00         0.01         0.00         0.02
PRECIP DURATION       0            1            0            1
MIXING HGT(M-MSL)                  2110                      1953
MIXING HGT(FT-MSL)                 6924                      6409
TRANSPORT WND (M/S)                N  0                      N  0
TRANSPORT WND (MPH)                N  0                      N  0
VENT RATE (M^2/S)                  0                         0
CATEGORY DAY                       1                         1
MIX HGT 500 TEMP(F)                80                        81
STABILITY CLASS       F            B            F            C

Remarks...None.

.FORECAST FOR DAYS 3 THROUGH 7...

.THURSDAY...Mostly cloudy. Slight chance of showers and
thunderstorms. Lows around 70. Highs in the mid 80s. North winds
5 to 10 mph. Category Day Index is 1.
.FRIDAY...Partly cloudy. Lows in the mid 60s. Highs in the lower
80s. Northeast winds around 5 mph.
.SATURDAY...Partly cloudy. Lows in the upper 50s. Highs in the
lower 80s. Northeast winds 5 to 10 mph.
.SUNDAY...Mostly clear. Lows in the mid 50s. Highs in the lower
80s. East winds around 5 mph.
.MONDAY...Partly cloudy. Slight chance of showers and
thunderstorms. Lows around 60. Highs in the lower 80s. Northeast
winds around 5 mph.

$$

TXZ096-097-108>112-124>126-137-138-261045-
Red River-Bowie-Franklin-Titus-Camp-Morris-Cass-Wood-Upshur-
Marion-Gregg-Harrison-
Including the cities of Clarksville, Bogata, Texarkana,
Mount Vernon, Mount Pleasant, Pittsburg, Daingerfield, Lone Star,
Naples, Omaha, Atlanta, Linden, Hughes Springs, Queen City,
Mineola, Winnsboro, Quitman, Hawkins, Gilmer, Big Sandy,
Jefferson, Longview, and Marshall
406 PM CDT Mon Sep 25 2017

                      Tonight      Tue          Tue Night    Wed

CLOUD COVER           MClear       PCldy        PCldy        MCldy
PRECIP TYPE           None         Tstms        None         Tstms
CHANCE PRECIP (%)     0            20           0            20
TEMP (24H TREND)      68 (+2)      91 (+1)      69           90
RH % (24H TREND)      88 (-1)      41 (-1)      90           47
20FTWND-AM(MPH)                    SE  4                     NE  4
20FTWND-PM(MPH)       SE  4        E  5         E  4         NE  5
PRECIP AMOUNT         0.00         0.01         0.00         0.03
PRECIP DURATION       0            1            0            1
MIXING HGT(M-MSL)                  2110                      1889
MIXING HGT(FT-MSL)                 6923                      6196
TRANSPORT WND (M/S)                N  0                      N  0
TRANSPORT WND (MPH)                N  0                      N  0
VENT RATE (M^2/S)                  0                         0
CATEGORY DAY                       1                         1
MIX HGT 500 TEMP(F)                79                        80
STABILITY CLASS       F            C            F            C

Remarks...None.

.FORECAST FOR DAYS 3 THROUGH 7...

.THURSDAY...Mostly cloudy with chance of showers and
thunderstorms. Lows in the lower 70s. Highs in the mid 80s. North
winds around 5 mph. Category Day Index is 1.
.FRIDAY...Mostly cloudy. Lows in the mid 60s. Highs in the mid
80s. Northeast winds around 5 mph.
.SATURDAY...Partly cloudy. Lows in the lower 60s. Highs in the
lower 80s. Northeast winds around 5 mph.
.SUNDAY...Mostly clear. Lows in the upper 50s. Highs in the mid
80s. East winds around 5 mph.
.MONDAY...Partly cloudy. Slight chance of showers and
thunderstorms. Lows in the lower 60s. Highs in the mid 80s.
Northeast winds around 5 mph.

$$

TXZ136-149>153-261045-
Smith-Cherokee-Rusk-Panola-Nacogdoches-Shelby-
Including the cities of Tyler, Jacksonville, Rusk, Henderson,
Carthage, Nacogdoches, and Center
406 PM CDT Mon Sep 25 2017

                      Tonight      Tue          Tue Night    Wed

CLOUD COVER           MClear       PCldy        PCldy        MCldy
PRECIP TYPE           None         Tstms        None         Tstms
CHANCE PRECIP (%)     0            20           0            20
TEMP (24H TREND)      68 (0)       90 (0)       69           90
RH % (24H TREND)      90 (-3)      44 (-1)      93           50
20FTWND-AM(MPH)                    SE  3                     NE  4
20FTWND-PM(MPH)       E  4         E  4         E  3         NE  4
PRECIP AMOUNT         0.00         0.01         0.00         0.02
PRECIP DURATION       0            1            0            1
MIXING HGT(M-MSL)                  2097                      1877
MIXING HGT(FT-MSL)                 6880                      6157
TRANSPORT WND (M/S)                N  0                      N  0
TRANSPORT WND (MPH)                N  0                      N  0
VENT RATE (M^2/S)                  0                         0
CATEGORY DAY                       1                         1
MIX HGT 500 TEMP(F)                80                        80
STABILITY CLASS       F            B            F            C

Remarks...None.

.FORECAST FOR DAYS 3 THROUGH 7...

.THURSDAY...Mostly cloudy with slight chance of showers and
thunderstorms. Lows in the lower 70s. Highs in the upper 80s.
North winds around 5 mph. Category Day Index is 1.
.FRIDAY...Partly cloudy. Lows in the upper 60s. Highs in the mid
80s. North winds around 5 mph.
.SATURDAY...Partly cloudy. Lows in the lower 60s. Highs in the
lower 80s. Northeast winds around 5 mph.
.SUNDAY...Mostly clear. Lows in the upper 50s. Highs in the mid
80s. Northeast winds around 5 mph.
.MONDAY...Partly cloudy. Slight chance of showers and
thunderstorms. Lows in the lower 60s. Highs in the mid 80s. North
winds up to 5 mph.

$$

TXZ165>167-261045-
Angelina-San Augustine-Sabine-
Including the cities of Lufkin, San Augustine, Hemphill,
and Pineland
406 PM CDT Mon Sep 25 2017

                      Tonight      Tue          Tue Night    Wed

CLOUD COVER           MClear       PCldy        PCldy        PCldy
PRECIP TYPE           None         Tstms        None         Tstms
CHANCE PRECIP (%)     0            20           0            20
TEMP (24H TREND)      69 (-1)      90 (-1)      70           91
RH % (24H TREND)      91 (-1)      49 (+2)      92           52
20FTWND-AM(MPH)                    LGT/VAR                   NE  4
20FTWND-PM(MPH)       E  3         E  4         E  3         NE  4
PRECIP AMOUNT         0.00         0.01         0.00         0.02
PRECIP DURATION       0            1            0            1
MIXING HGT(M-MSL)                  2100                      1888
MIXING HGT(FT-MSL)                 6891                      6193
TRANSPORT WND (M/S)                N  0                      N  0
TRANSPORT WND (MPH)                N  0                      N  0
VENT RATE (M^2/S)                  0                         0
CATEGORY DAY                       1                         1
MIX HGT 500 TEMP(F)                80                        81
STABILITY CLASS       F            B            F            B

Remarks...None.

.FORECAST FOR DAYS 3 THROUGH 7...

.THURSDAY...Mostly cloudy. Slight chance of showers and
thunderstorms. Lows in the lower 70s. Highs in the upper 80s.
Northeast winds up to 5 mph. Category Day Index is 1.
.FRIDAY...Partly cloudy. Lows in the upper 60s. Highs in the
upper 80s. Northeast winds around 5 mph.
.SATURDAY...Partly cloudy. Lows in the lower 60s. Highs in the
mid 80s. Northeast winds around 5 mph.
.SUNDAY...Partly cloudy. Lows around 60. Highs in the mid 80s.
Northeast winds around 5 mph.
.MONDAY...Partly cloudy. Slight chance of showers and
thunderstorms. Lows in the lower 60s. Highs in the mid 80s.
Northeast winds around 5 mph.

$$

LAZ001>004-012-261045-
Caddo-Bossier-Webster-Claiborne-Bienville-
Including the cities of Shreveport, Bossier City, Minden,
Springhill, Homer, Haynesville, Arcadia, Ringgold, and Gibsland
406 PM CDT Mon Sep 25 2017

                      Tonight      Tue          Tue Night    Wed

CLOUD COVER           MClear       PCldy        PCldy        MCldy
PRECIP TYPE           None         Tstms        None         Tstms
CHANCE PRECIP (%)     0            20           0            20
TEMP (24H TREND)      68 (+1)      90 (+1)      69           90
RH % (24H TREND)      89 (-1)      46 (+1)      92           51
20FTWND-AM(MPH)                    E  4                      NE  4
20FTWND-PM(MPH)       E  3         E  4         E  3         NE  4
PRECIP AMOUNT         0.00         0.01         0.00         0.01
PRECIP DURATION       0            1            0            1
MIXING HGT(M-MSL)                  2102                      1888
MIXING HGT(FT-MSL)                 6895                      6193
TRANSPORT WND (M/S)                N  0                      N  0
TRANSPORT WND (MPH)                N  0                      N  0
VENT RATE (M^2/S)                  0                         0
CATEGORY DAY                       1                         1
MIX HGT 500 TEMP(F)                81                        80
STABILITY CLASS       F            B            F            C

Remarks...None.

.FORECAST FOR DAYS 3 THROUGH 7...

.THURSDAY...Mostly cloudy. Slight chance of showers and
thunderstorms. Lows in the lower 70s. Highs in the upper 80s.
North winds around 5 mph. Category Day Index is 1.
.FRIDAY...Partly cloudy. Lows in the mid 60s. Highs in the mid
80s. Northeast winds around 5 mph.
.SATURDAY...Partly cloudy. Lows in the lower 60s. Highs in the
lower 80s. Northeast winds 5 to 10 mph.
.SUNDAY...Mostly clear. Lows in the upper 50s. Highs in the mid
80s. East winds around 5 mph.
.MONDAY...Partly cloudy. Slight chance of showers and
thunderstorms. Lows in the lower 60s. Highs in the mid 80s.
Northeast winds up to 5 mph.

$$

LAZ005-006-013-014-261045-
Lincoln-Union-Jackson-Ouachita-
Including the cities of Ruston, Farmerville, Bernice, Jonesboro,
and Monroe
406 PM CDT Mon Sep 25 2017

                      Tonight      Tue          Tue Night    Wed

CLOUD COVER           MClear       PCldy        PCldy        PCldy
PRECIP TYPE           None         Tstms        None         Tstms
CHANCE PRECIP (%)     0            20           0            20
TEMP (24H TREND)      68 (+3)      89 (0)       69           91
RH % (24H TREND)      91 (-1)      50 (+4)      92           49
20FTWND-AM(MPH)                    E  3                      NE  3
20FTWND-PM(MPH)       LGT/VAR      E  4         LGT/VAR      NE  4
PRECIP AMOUNT         0.00         0.01         0.00         0.01
PRECIP DURATION       0            1            0            1
MIXING HGT(M-MSL)                  2097                      1914
MIXING HGT(FT-MSL)                 6879                      6278
TRANSPORT WND (M/S)                N  0                      N  0
TRANSPORT WND (MPH)                N  0                      N  0
VENT RATE (M^2/S)                  0                         0
CATEGORY DAY                       1                         1
MIX HGT 500 TEMP(F)                80                        81
STABILITY CLASS       F            B            F            C

Remarks...None.

.FORECAST FOR DAYS 3 THROUGH 7...

.THURSDAY...Partly cloudy. Slight chance of showers and
thunderstorms. Lows in the lower 70s. Highs in the upper 80s.
North winds around 5 mph. Category Day Index is 1.
.FRIDAY...Partly cloudy. Lows in the mid 60s. Highs in the mid
80s. Northeast winds around 5 mph.
.SATURDAY...Mostly clear. Lows around 60. Highs in the lower 80s.
Northeast winds 5 to 10 mph.
.SUNDAY...Partly cloudy. Lows in the upper 50s. Highs in the mid
80s. Northeast winds around 5 mph.
.MONDAY...Partly cloudy. Slight chance of showers and
thunderstorms. Lows in the lower 60s. Highs in the mid 80s.
Northeast winds around 5 mph.

$$

LAZ010-011-017-018-261045-
De Soto-Red River-Sabine-Natchitoches-
Including the cities of Mansfield, Stonewall, Logansport,
Coushatta, Martin, Many, Zwolle, Pleasant Hill, and Natchitoches
406 PM CDT Mon Sep 25 2017

                      Tonight      Tue          Tue Night    Wed

CLOUD COVER           MClear       PCldy        PCldy        PCldy
PRECIP TYPE           None         Tstms        None         Tstms
CHANCE PRECIP (%)     0            20           0            20
TEMP (24H TREND)      68 (0)       89 (-2)      70           90
RH % (24H TREND)      91 (-1)      49 (+4)      93           52
20FTWND-AM(MPH)                    LGT/VAR                   NE  4
20FTWND-PM(MPH)       E  3         E  4         LGT/VAR      NE  4
PRECIP AMOUNT         0.00         0.01         0.00         0.02
PRECIP DURATION       0            1            0            1
MIXING HGT(M-MSL)                  2092                      1885
MIXING HGT(FT-MSL)                 6862                      6185
TRANSPORT WND (M/S)                N  0                      N  0
TRANSPORT WND (MPH)                N  0                      N  0
VENT RATE (M^2/S)                  0                         0
CATEGORY DAY                       1                         1
MIX HGT 500 TEMP(F)                81                        80
STABILITY CLASS       F            B            F            B

Remarks...None.

.FORECAST FOR DAYS 3 THROUGH 7...

.THURSDAY...Mostly cloudy. Slight chance of showers and
thunderstorms. Lows in the lower 70s. Highs around 90. North
winds up to 5 mph. Category Day Index is 1.
.FRIDAY...Partly cloudy. Lows in the upper 60s. Highs in the mid
80s. Northeast winds around 5 mph.
.SATURDAY...Partly cloudy. Lows in the lower 60s. Highs in the
mid 80s. Northeast winds 5 to 10 mph.
.SUNDAY...Mostly clear. Lows in the upper 50s. Highs in the mid
80s. Northeast winds around 5 mph.
.MONDAY...Partly cloudy. Slight chance of showers and
thunderstorms. Lows in the lower 60s. Highs in the upper 80s.
Northeast winds around 5 mph.

$$

LAZ019>022-261045-
Winn-Grant-Caldwell-La Salle-
Including the cities of Winnfield, Colfax, Montgomery, Dry Prong,
Clarks, Grayson, Columbia, Jena, Midway, and Olla
406 PM CDT Mon Sep 25 2017

                      Tonight      Tue          Tue Night    Wed

CLOUD COVER           MClear       PCldy        PCldy        PCldy
PRECIP TYPE           None         Tstms        None         Tstms
CHANCE PRECIP (%)     0            20           0            20
TEMP (24H TREND)      68 (+3)      89 (0)       69           91
RH % (24H TREND)      91 (-2)      52 (+6)      94           52
20FTWND-AM(MPH)                    LGT/VAR                   LGT/VAR
20FTWND-PM(MPH)       E  3         E  4         LGT/VAR      NE  4
PRECIP AMOUNT         0.00         0.01         0.00         0.01
PRECIP DURATION       0            1            0            1
MIXING HGT(M-MSL)                  2091                      1903
MIXING HGT(FT-MSL)                 6859                      6243
TRANSPORT WND (M/S)                N  0                      N  0
TRANSPORT WND (MPH)                N  0                      N  0
VENT RATE (M^2/S)                  0                         0
CATEGORY DAY                       1                         1
MIX HGT 500 TEMP(F)                80                        81
STABILITY CLASS       F            B            F            B

Remarks...None.

.FORECAST FOR DAYS 3 THROUGH 7...

.THURSDAY...Partly cloudy. Slight chance of showers and
thunderstorms. Lows in the lower 70s. Highs around 90. North
winds up to 5 mph. Category Day Index is 1.
.FRIDAY...Partly cloudy. Lows in the upper 60s. Highs in the mid
80s. North winds around 5 mph.
.SATURDAY...Mostly clear. Lows in the lower 60s. Highs in the
lower 80s. Northeast winds 5 to 10 mph.
.SUNDAY...Mostly clear. Lows in the upper 50s. Highs in the mid
80s. Northeast winds around 5 mph.
.MONDAY...Partly cloudy. Slight chance of showers and
thunderstorms. Lows in the lower 60s. Highs in the mid 80s.
Northeast winds around 5 mph.

$$

06
   
Latest Site Specific Fire Weather Forecasts (FWMSHV; please check date & time with these products) 
000
FNUS84 KSHV 252020
FWMSHV

FCST,160401,170926,13,1,86,56,1,1,E,04,M,91,70,91,45,0,0,N
FCST,161803,170926,13,1,87,56,1,1,ENE,04,M,90,70,92,47,0,0,N
FCST,161902,170926,13,1,87,58,1,1,E,04,M,90,70,89,49,0,0,N
FCST,162502,170926,13,1,87,58,1,1,E,04,M,90,70,89,47,0,0,N
FCST,347701,170926,13,2,87,49,1,1,ESE,04,M,90,69,88,44,0,0,N
FCST,036502,170926,13,2,87,51,1,1,E,04,M,91,70,86,42,0,0,N
FCST,037302,170926,13,1,87,55,1,1,E,03,M,91,70,90,44,0,0,N
FCST,410401,170926,13,2,88,47,1,1,ESE,04,M,91,71,86,41,0,0,N
FCST,410501,170926,13,2,88,49,1,1,E,04,M,90,70,89,44,0,0,N
FCST,411102,170926,13,2,88,47,1,1,E,04,M,91,69,88,41,0,0,N
FCST,411401,170926,13,2,88,50,1,1,E,04,M,90,70,89,45,0,0,N
FCST,411901,170926,13,2,88,51,1,1,E,04,M,91,71,83,44,0,0,N
FCST,412202,170926,13,2,87,51,1,1,E,05,M,91,71,89,44,0,0,N
FCST,412801,170926,13,2,87,56,1,1,E,04,M,90,70,92,49,0,0,N
FCST,412901,170926,13,1,88,57,1,1,E,04,M,91,71,89,47,0,0,N
FCST,413503,170926,13,1,88,56,1,1,E,04,M,92,72,92,47,0,0,N
FCST,413509,170926,13,1,88,54,1,1,E,04,M,91,71,89,47,0,0,N
FCST,413701,170926,13,1,88,55,1,1,ENE,04,M,91,71,89,47,0,0,N
FCST,411701,170926,13,2,88,52,1,1,ESE,05,M,90,71,87,47,0,0,N
 

 

Latest Fire Weather Watches & Red Flag Warnings (RFWSHV) 

					

				
			

					
		

		

			 
			 
		

		

			
			

				
					

						Latest Fire Danger Statement (RFDSHV)
					

					

						

					

				
			

					
			 
		

	




 



        

            

          

	
		

			
		

		

			Fire Weather Parameter Definitions
		

		

			
			

				
					

						Cloud Cover
						Predominant cloud condition (e.g., cloudy, pcldy, clear).
					

					

						Precip Type
						Type of precipitation expected to occur such as rain, showers, thunderstorms.
					

					

						Temp (24H Trend)
						Forecast maximum or minimum temperatures in Fahrenheit with a 24-hour trend note in parenthesis.
					

					

						RH % (24H Trend)
						Forecast maximum or minimum relative humidity with a 24-hour trend noted in parenthesis.
					

					

						20FT Wind (MPH)
						20-foot wind speed (mph) and direction (eight compass points).
					

					

						Precip Amount
						Amount of liquid precipitation expected to the nearest hundredth (0.01).
					

					

						Precip Duration
						Number of hours measurable precipitation is expected to last.
					

					

						Mixing Hgt (M - MSL)

						and

						Mixing Hgt (FT - MSL)		
						A projected height in meters or feet above mean sea level through which vigorous mixing will take place based on the maximum temperature on a given day. It is the height at which smoke will lose its buoyancy and stop rising. It is valid for the afternoon hours when temperature nears the predicted maximum.
					

					

						Transport Wnd (M/S)

						and

						Transport Wnd (MPH)		
						The predicted average wind in meters per second or miles per hour in the layer below the mixing height near the predicted maximum (usually in the afternoon).
					

					

						Vent Index
						The Ventilation Index parameter is obtained by multiplying the mixing height in meters times the wind speed in meters per second.
					

					

						Cat Day
						The Vent Index corresponds to a Catgeory Day.
						

							
								

									< 2000
									1
								

								

									2000 - 3999
									2
								

								

									4000 - 7999
									3
								

								

									8000 - 16,000
									4
								

								

									> 16,000
									5
								

							
						

								
					

					

						Mix Hgt 500
						The temperature in Fahrenheit needed to achieve a mixing height of 500 meters. If the expected high temperature is cooler than the 500 meter mixing height temperature, then the mixing height parameter above will be less than 500 meters.
					

					

						Stability Class
						The stability class based on wind, incoming solar radiation (sun angle), and cloud cover. The more unstable the forecast stability class, the more readiliy a pollutant is dispersed.
						

							
								

									Stability Class Description
								

								

									A
									Extremely Unstable
								

								

									B
									Unstable
								

								

									C
									Slightly Unstable
								

								

									D
									Neutral
								

								

									E
									Slightly Stable
								

								

									F
									Stable
								

							
						

								
					

				
			

					
		

		

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