National Weather Service United States Department of Commerce

Heavy Rain and Potential for Flash Flooding for Mid-Atlantic

An unseasonably strong storm system will bring heavy rain to the Mid-Atlantic and central Appalachians Friday into Saturday. Flash flooding and widespread lowland flooding are possible during this period. Meanwhile, monsoon moisture will continue to produce heavy rain with the possibility of localized flash flooding in the Desert Southwest through the southern/central Rockies and High Plains. Read More >

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Latest Fire Weather Forecast (FWFSHV)
000
FNUS54 KSHV 280945
FWFSHV

Fire Weather Planning Forecast for Southwest Arkansas...
Northwest Louisiana...East Texas...and Extreme Southeast Oklahoma
National Weather Service Shreveport LA
445 AM CDT Fri Jul 28 2017

.DISCUSSION...
Cannot rule out the possibility of isolated showers and
thunderstorms today, especially for those districts along and
north of the Interstate 20 Corridor. More in the way of
scattered showers and thunderstorms will be possible this
evening into the overnight hours with the best chances
across portions of Southwest Arkansas into portions of
North Central and Northeast Louisiana. The increased rain
chances will be associated with a strong cold front for
late July which will help to lower temperatures and
humidity values for the weekend into early next week.

OKZ077-282230-
McCurtain-
Including the cities of Idabel and Broken Bow
445 AM CDT Fri Jul 28 2017

                      Today        Tonight      Sat

CLOUD COVER           MCldy        MCldy        PCldy
PRECIP TYPE           Tstms        Tstms        None
CHANCE PRECIP (%)     30           30           0
TEMP (24H TREND)      93 (-1)      74 (-1)      92
RH % (24H TREND)      54 (+2)      91 (+1)      51
20FTWND-AM(MPH)       W  5                      NE  5
20FTWND-PM(MPH)       NW  4        NE  4        NE  4
PRECIP AMOUNT         0.08         0.11         0.00
PRECIP DURATION       2            2            0
MIXING HGT(M-MSL)     2073                      2053
MIXING HGT(FT-MSL)    6802                      6735
TRANSPORT WND (M/S)   W  7                      NE  4
TRANSPORT WND (MPH)   W 15                      NE  8
VENT RATE (M^2/S)     14511                     8212
CATEGORY DAY          4                         4
MIX HGT 500 TEMP(F)   84                        80
STABILITY CLASS       C            F            C

Remarks...None.

.FORECAST FOR DAYS 3 THROUGH 7...

.SUNDAY...Partly cloudy. Lows in the upper 60s. Highs in the
upper 80s. Northeast winds around 5 mph. Category Day Index is 4.
.MONDAY...Partly cloudy. Lows in the mid 60s. Highs in the upper
80s. Northeast winds around 5 mph.
.TUESDAY...Partly cloudy. Slight chance of showers and
thunderstorms. Lows in the mid 60s. Highs in the upper 80s.
Northeast winds around 5 mph.
.WEDNESDAY...Mostly cloudy. Slight chance of showers and
thunderstorms. Lows in the upper 60s. Highs in the upper 80s.
Light winds.
.THURSDAY...Mostly cloudy. Slight chance of showers and
thunderstorms. Lows in the upper 60s. Highs in the upper 80s.
Light winds.

$$

ARZ050-051-059-282230-
Sevier-Howard-Little River-
Including the cities of De Queen, Nashville, Mineral Springs,
Dierks, and Ashdown
445 AM CDT Fri Jul 28 2017

                      Today        Tonight      Sat

CLOUD COVER           MCldy        MCldy        PCldy
PRECIP TYPE           Tstms        Tstms        None
CHANCE PRECIP (%)     30           30           0
TEMP (24H TREND)      93 (-1)      74 (-2)      92
RH % (24H TREND)      57 (+3)      92 (0)       51
20FTWND-AM(MPH)       SW  6                     NE  6
20FTWND-PM(MPH)       NW  4        LGT/VAR      NE  4
PRECIP AMOUNT         0.09         0.14         0.00
PRECIP DURATION       2            2            1
MIXING HGT(M-MSL)     2079                      2043
MIXING HGT(FT-MSL)    6821                      6703
TRANSPORT WND (M/S)   W  7                      NE  4
TRANSPORT WND (MPH)   W 16                      NE  9
VENT RATE (M^2/S)     14553                     8172
CATEGORY DAY          4                         4
MIX HGT 500 TEMP(F)   85                        80
STABILITY CLASS       C            F            C

Remarks...None.

.FORECAST FOR DAYS 3 THROUGH 7...

.SUNDAY...Mostly clear. Lows in the mid 60s. Highs in the upper
80s. Northeast winds around 5 mph. Category Day Index is 4.
.MONDAY...Partly cloudy. Lows in the mid 60s. Highs in the upper
80s. Northeast winds around 5 mph.
.TUESDAY...Partly cloudy. Lows in the mid 60s. Highs around 90.
East winds around 5 mph.
.WEDNESDAY...Mostly cloudy. Slight chance of showers and
thunderstorms. Lows in the upper 60s. Highs in the upper 80s.
Light winds.
.THURSDAY...Mostly cloudy. Slight chance of showers and
thunderstorms. Lows in the upper 60s. Highs in the upper 80s.
Light winds.

$$

ARZ060-061-070>073-282230-
Hempstead-Nevada-Miller-Lafayette-Columbia-Union-
Including the cities of Hope, Prescott, Texarkana, Stamps,
Lewisville, Bradley, Magnolia, and El Dorado
445 AM CDT Fri Jul 28 2017

                      Today        Tonight      Sat

CLOUD COVER           PCldy        MCldy        PCldy
PRECIP TYPE           Tstms        Tstms        Tstms
CHANCE PRECIP (%)     30           40           20
TEMP (24H TREND)      93 (-2)      74 (-2)      91
RH % (24H TREND)      54 (+5)      92 (+3)      50
20FTWND-AM(MPH)       SW  7                     NE  6
20FTWND-PM(MPH)       W  6         N  3         NE  5
PRECIP AMOUNT         0.05         0.31         0.02
PRECIP DURATION       2            2            1
MIXING HGT(M-MSL)     2077                      2038
MIXING HGT(FT-MSL)    6813                      6685
TRANSPORT WND (M/S)   W  7                      NE  5
TRANSPORT WND (MPH)   W 16                      NE 12
VENT RATE (M^2/S)     14539                     10190
CATEGORY DAY          4                         4
MIX HGT 500 TEMP(F)   86                        81
STABILITY CLASS       C            F            C

Remarks...None.

.FORECAST FOR DAYS 3 THROUGH 7...

.SUNDAY...Mostly clear. Lows in the mid 60s. Highs in the upper
80s. Northeast winds around 5 mph. Category Day Index is 4.
.MONDAY...Partly cloudy. Lows in the mid 60s. Highs in the upper
80s. Northeast winds around 5 mph.
.TUESDAY...Partly cloudy. Lows in the upper 60s. Highs around 90.
Northeast winds around 5 mph.
.WEDNESDAY...Mostly cloudy. Slight chance of showers and
thunderstorms. Lows in the upper 60s. Highs around 90. Northeast
winds up to 5 mph.
.THURSDAY...Mostly cloudy. Slight chance of showers and
thunderstorms. Lows around 70. Highs around 90. Northeast winds
up to 5 mph.

$$

TXZ096-097-108>112-124>126-137-138-282230-
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
445 AM CDT Fri Jul 28 2017

                      Today        Tonight      Sat

CLOUD COVER           PCldy        MCldy        PCldy
PRECIP TYPE           Tstms        Tstms        Tstms
CHANCE PRECIP (%)     20           30           30
TEMP (24H TREND)      97 (+1)      76 (-1)      92
RH % (24H TREND)      47 (+1)      88 (+6)      51
20FTWND-AM(MPH)       SW  8                     NE  5
20FTWND-PM(MPH)       W  6         SW  4        NE  5
PRECIP AMOUNT         0.01         0.16         0.06
PRECIP DURATION       1            2            1
MIXING HGT(M-MSL)     2089                      2045
MIXING HGT(FT-MSL)    6852                      6710
TRANSPORT WND (M/S)   W  6                      NE  5
TRANSPORT WND (MPH)   W 13                      NE 10
VENT RATE (M^2/S)     12534                     10225
CATEGORY DAY          4                         4
MIX HGT 500 TEMP(F)   85                        83
STABILITY CLASS       C            F            C

Remarks...None.

.FORECAST FOR DAYS 3 THROUGH 7...

.SUNDAY...Partly cloudy. Lows in the upper 60s. Highs around 90.
North winds around 5 mph. Category Day Index is 4.
.MONDAY...Partly cloudy. Lows in the mid 60s. Highs in the upper
80s. Northeast winds around 5 mph.
.TUESDAY...Partly cloudy. Slight chance of showers and
thunderstorms. Lows in the upper 60s. Highs around 90. Northeast
winds around 5 mph.
.WEDNESDAY...Mostly cloudy. Slight chance of showers and
thunderstorms. Lows in the lower 70s. Highs in the upper 80s.
Light winds.
.THURSDAY...Mostly cloudy. Chance of showers and thunderstorms.
Lows in the lower 70s. Highs around 90. East winds up to 5 mph.

$$

TXZ136-149>153-282230-
Smith-Cherokee-Rusk-Panola-Nacogdoches-Shelby-
Including the cities of Tyler, Jacksonville, Rusk, Henderson,
Carthage, Nacogdoches, and Center
445 AM CDT Fri Jul 28 2017

                      Today        Tonight      Sat

CLOUD COVER           PCldy        PCldy        PCldy
PRECIP TYPE           None         Tstms        Tstms
CHANCE PRECIP (%)     0            30           30
TEMP (24H TREND)      96 (+1)      76 (0)       93
RH % (24H TREND)      49 (-2)      89 (+1)      53
20FTWND-AM(MPH)       SW  8                     W  4
20FTWND-PM(MPH)       W  6         SW  4        N  4
PRECIP AMOUNT         0.00         0.07         0.11
PRECIP DURATION       0            2            2
MIXING HGT(M-MSL)     2096                      2058
MIXING HGT(FT-MSL)    6878                      6752
TRANSPORT WND (M/S)   W  5                      N  5
TRANSPORT WND (MPH)   W 10                      N 10
VENT RATE (M^2/S)     10480                     10290
CATEGORY DAY          4                         4
MIX HGT 500 TEMP(F)   84                        85
STABILITY CLASS       B            F            B

Remarks...None.

.FORECAST FOR DAYS 3 THROUGH 7...

.SUNDAY...Partly cloudy. Lows in the lower 70s. Highs in the
lower 90s. North winds around 5 mph. Category Day Index is 4.
.MONDAY...Partly cloudy. Lows in the upper 60s. Highs around 90.
Northeast winds around 5 mph.
.TUESDAY...Mostly cloudy. Slight chance of showers and
thunderstorms. Lows in the lower 70s. Highs in the lower 90s.
Northeast winds up to 5 mph.
.WEDNESDAY...Mostly cloudy. Chance of showers and thunderstorms.
Lows in the lower 70s. Highs in the upper 80s. Northeast winds up
to 5 mph.
.THURSDAY...Mostly cloudy. Chance of showers and thunderstorms.
Lows in the lower 70s. Highs in the upper 80s. East winds up to
5 mph.

$$

TXZ165>167-282230-
Angelina-San Augustine-Sabine-
Including the cities of Lufkin, San Augustine, Hemphill,
and Pineland
445 AM CDT Fri Jul 28 2017

                      Today        Tonight      Sat

CLOUD COVER           PCldy        PCldy        MCldy
PRECIP TYPE           None         Tstms        Tstms
CHANCE PRECIP (%)     0            30           40
TEMP (24H TREND)      97 (+3)      76 (0)       94
RH % (24H TREND)      48 (-3)      88 (-3)      54
20FTWND-AM(MPH)       SW  5                     W  4
20FTWND-PM(MPH)       W  5         W  3         NW  4
PRECIP AMOUNT         0.00         0.03         0.15
PRECIP DURATION       0            2            2
MIXING HGT(M-MSL)     2090                      2077
MIXING HGT(FT-MSL)    6858                      6814
TRANSPORT WND (M/S)   W  4                      NW  6
TRANSPORT WND (MPH)   W  8                      NW 14
VENT RATE (M^2/S)     8360                      12462
CATEGORY DAY          4                         4
MIX HGT 500 TEMP(F)   84                        84
STABILITY CLASS       B            F            B

Remarks...None.

.FORECAST FOR DAYS 3 THROUGH 7...

.SUNDAY...Partly cloudy. Lows in the lower 70s. Highs in the
lower 90s. Northeast winds around 5 mph. Category Day Index is 4.
.MONDAY...Partly cloudy. Lows in the upper 60s. Highs in the
lower 90s. Northeast winds around 5 mph.
.TUESDAY...Mostly cloudy. Slight chance of showers and
thunderstorms. Lows in the lower 70s. Highs in the lower 90s.
East winds up to 5 mph.
.WEDNESDAY...Mostly cloudy. Chance of showers and thunderstorms.
Lows in the lower 70s. Highs in the upper 80s. Northeast winds up
to 5 mph.
.THURSDAY...Mostly cloudy with chance of showers and
thunderstorms. Lows in the lower 70s. Highs in the upper 80s.
East winds up to 5 mph.

$$

LAZ001>004-012-282230-
Caddo-Bossier-Webster-Claiborne-Bienville-
Including the cities of Shreveport, Bossier City, Minden,
Springhill, Homer, Haynesville, Arcadia, Ringgold, and Gibsland
445 AM CDT Fri Jul 28 2017

                      Today        Tonight      Sat

CLOUD COVER           PCldy        MCldy        PCldy
PRECIP TYPE           Tstms        Tstms        Tstms
CHANCE PRECIP (%)     20           40           30
TEMP (24H TREND)      95 (0)       76 (-1)      91
RH % (24H TREND)      51 (+5)      90 (+3)      55
20FTWND-AM(MPH)       SW  7                     NE  3
20FTWND-PM(MPH)       W  6         W  4         NE  6
PRECIP AMOUNT         0.01         0.24         0.10
PRECIP DURATION       1            2            2
MIXING HGT(M-MSL)     2086                      2042
MIXING HGT(FT-MSL)    6843                      6701
TRANSPORT WND (M/S)   W  6                      NE  5
TRANSPORT WND (MPH)   W 14                      NE 10
VENT RATE (M^2/S)     12516                     10210
CATEGORY DAY          4                         4
MIX HGT 500 TEMP(F)   85                        82
STABILITY CLASS       C            F            B

Remarks...None.

.FORECAST FOR DAYS 3 THROUGH 7...

.SUNDAY...Mostly clear. Lows in the upper 60s. Highs in the upper
80s. Northeast winds around 5 mph. Category Day Index is 4.
.MONDAY...Partly cloudy. Lows in the mid 60s. Highs in the upper
80s. Northeast winds around 5 mph.
.TUESDAY...Partly cloudy. Slight chance of showers and
thunderstorms. Lows in the upper 60s. Highs around 90. Northeast
winds around 5 mph.
.WEDNESDAY...Mostly cloudy. Slight chance of showers and
thunderstorms. Lows in the lower 70s. Highs around 90. Northeast
winds up to 5 mph.
.THURSDAY...Mostly cloudy. Chance of showers and thunderstorms.
Lows in the lower 70s. Highs around 90. East winds up to 5 mph.

$$

LAZ005-006-013-014-282230-
Lincoln-Union-Jackson-Ouachita-
Including the cities of Ruston, Farmerville, Bernice, Jonesboro,
and Monroe
445 AM CDT Fri Jul 28 2017

                      Today        Tonight      Sat

CLOUD COVER           PCldy        MCldy        PCldy
PRECIP TYPE           Tstms        Tstms        Tstms
CHANCE PRECIP (%)     20           40           40
TEMP (24H TREND)      95 (0)       76 (0)       89
RH % (24H TREND)      54 (+5)      90 (+2)      57
20FTWND-AM(MPH)       SW  6                     N  4
20FTWND-PM(MPH)       W  6         W  3         NE  6
PRECIP AMOUNT         0.01         0.35         0.11
PRECIP DURATION       1            2            2
MIXING HGT(M-MSL)     2079                      2036
MIXING HGT(FT-MSL)    6821                      6681
TRANSPORT WND (M/S)   W  7                      NE  6
TRANSPORT WND (MPH)   W 15                      NE 13
VENT RATE (M^2/S)     14553                     12216
CATEGORY DAY          4                         4
MIX HGT 500 TEMP(F)   87                        82
STABILITY CLASS       C            F            B

Remarks...None.

.FORECAST FOR DAYS 3 THROUGH 7...

.SUNDAY...Mostly clear. Lows in the mid 60s. Highs in the upper
80s. Northeast winds around 5 mph. Category Day Index is 4.
.MONDAY...Partly cloudy. Lows in the mid 60s. Highs in the upper
80s. Northeast winds around 5 mph.
.TUESDAY...Partly cloudy. Lows in the upper 60s. Highs around 90.
East winds up to 5 mph.
.WEDNESDAY...Mostly cloudy. Slight chance of showers and
thunderstorms. Lows around 70. Highs around 90. East winds up to
5 mph.
.THURSDAY...Mostly cloudy. Chance of showers and thunderstorms.
Lows in the lower 70s. Highs around 90. East winds up to 5 mph.

$$

LAZ010-011-017-018-282230-
De Soto-Red River-Sabine-Natchitoches-
Including the cities of Mansfield, Stonewall, Logansport,
Coushatta, Martin, Many, Zwolle, Pleasant Hill, and Natchitoches
445 AM CDT Fri Jul 28 2017

                      Today        Tonight      Sat

CLOUD COVER           PCldy        MCldy        MCldy
PRECIP TYPE           None         Tstms        Tstms
CHANCE PRECIP (%)     0            30           40
TEMP (24H TREND)      96 (+3)      77 (+2)      92
RH % (24H TREND)      50 (+1)      90 (-4)      58
20FTWND-AM(MPH)       SW  6                     W  4
20FTWND-PM(MPH)       W  6         W  3         N  4
PRECIP AMOUNT         0.00         0.12         0.21
PRECIP DURATION       0            2            2
MIXING HGT(M-MSL)     2087                      2050
MIXING HGT(FT-MSL)    6847                      6724
TRANSPORT WND (M/S)   W  5                      N  5
TRANSPORT WND (MPH)   W 12                      N 10
VENT RATE (M^2/S)     10435                     10250
CATEGORY DAY          4                         4
MIX HGT 500 TEMP(F)   85                        85
STABILITY CLASS       B            F            B

Remarks...None.

.FORECAST FOR DAYS 3 THROUGH 7...

.SUNDAY...Partly cloudy. Lows in the upper 60s. Highs around 90.
Northeast winds around 5 mph. Category Day Index is 4.
.MONDAY...Partly cloudy. Lows in the upper 60s. Highs in the
lower 90s. Northeast winds around 5 mph.
.TUESDAY...Partly cloudy. Slight chance of showers and
thunderstorms. Lows around 70. Highs in the lower 90s. East winds
up to 5 mph.
.WEDNESDAY...Mostly cloudy. Chance of showers and thunderstorms.
Lows in the lower 70s. Highs around 90. Northeast winds up to
5 mph.
.THURSDAY...Mostly cloudy. Chance of showers and thunderstorms.
Lows in the lower 70s. Highs in the upper 80s. East winds up to
5 mph.

$$

LAZ019>022-282230-
Winn-Grant-Caldwell-La Salle-
Including the cities of Winnfield, Colfax, Montgomery, Dry Prong,
Clarks, Grayson, Columbia, Jena, Midway, and Olla
445 AM CDT Fri Jul 28 2017

                      Today        Tonight      Sat

CLOUD COVER           PCldy        MCldy        MCldy
PRECIP TYPE           none         Tstms        Tstms
CHANCE PRECIP (%)     0            40           50
TEMP (24H TREND)      95 (+1)      77 (+3)      90
RH % (24H TREND)      53 (+3)      90 (-5)      60
20FTWND-AM(MPH)       W  5                      NW  4
20FTWND-PM(MPH)       W  5         SW  4        NE  5
PRECIP AMOUNT         0.00         0.23         0.35
PRECIP DURATION       0            2            2
MIXING HGT(M-MSL)     2078                      2038
MIXING HGT(FT-MSL)    6818                      6686
TRANSPORT WND (M/S)   W  5                      N  5
TRANSPORT WND (MPH)   W 12                      N 12
VENT RATE (M^2/S)     10390                     10190
CATEGORY DAY          4                         4
MIX HGT 500 TEMP(F)   87                        85
STABILITY CLASS       B            F            C

Remarks...None.

.FORECAST FOR DAYS 3 THROUGH 7...

.SUNDAY...Mostly clear. Lows in the upper 60s. Highs in the upper
80s. North winds around 5 mph. Category Day Index is 4.
.MONDAY...Partly cloudy. Lows in the upper 60s. Highs around 90.
Northeast winds around 5 mph.
.TUESDAY...Partly cloudy. Slight chance of showers and
thunderstorms. Lows around 70. Highs in the lower 90s. East winds
up to 5 mph.
.WEDNESDAY...Mostly cloudy. Chance of showers and thunderstorms.
Lows in the lower 70s. Highs in the upper 80s. East winds up to
5 mph.
.THURSDAY...Mostly cloudy. Chance of showers and thunderstorms.
Lows in the lower 70s. Highs in the upper 80s. East winds up to
5 mph.

$$

13

   
Latest Site Specific Fire Weather Forecasts (FWMSHV; please check date & time with these products)
000
FNUS84 KSHV 281937
FWMSHV

FCST,160401,170729,13,2,89,62,1,1,NNE,06,M,93,76,100,49,0,0,N
FCST,161803,170729,13,2,90,64,1,1,NNW,05,M,95,78,96,48,0,0,N
FCST,161902,170729,13,2,88,67,1,1,N,05,M,94,78,99,52,0,0,N
FCST,162502,170729,13,2,88,67,1,1,NNW,05,M,94,78,99,54,0,0,N
FCST,347701,170729,13,2,89,57,1,1,NE,05,M,92,75,99,56,0,0,N
FCST,036502,170729,13,2,88,55,1,1,NE,08,M,92,75,99,55,0,0,N
FCST,037302,170729,13,2,89,57,1,1,NNE,08,M,92,75,100,57,0,0,N
FCST,410401,170729,13,2,90,55,1,1,NE,08,M,95,76,95,43,0,0,N
FCST,410501,170729,13,2,89,57,1,1,NE,08,M,93,76,99,54,0,0,N
FCST,411102,170729,13,2,91,54,1,1,NE,08,M,95,75,99,39,0,0,N
FCST,411401,170729,13,2,90,59,1,1,NE,08,M,96,77,95,49,0,0,N
FCST,411901,170729,13,2,90,59,1,1,NNE,08,M,95,77,95,40,0,0,N
FCST,412202,170729,13,2,92,58,1,1,NNE,08,M,96,78,93,46,0,0,N
FCST,412801,170729,13,2,93,57,1,1,NNW,05,M,95,78,93,47,0,0,N
FCST,412901,170729,13,2,92,61,1,1,NNW,05,M,96,79,96,49,0,0,N
FCST,413503,170729,13,2,93,58,1,1,WNW,05,M,95,78,93,50,0,0,N
FCST,413509,170729,13,2,93,56,1,1,WNW,05,M,95,78,93,50,0,0,N
FCST,413701,170729,13,2,92,57,1,1,NW,05,M,95,78,96,49,0,0,N
FCST,411701,170729,13,2,92,59,1,1,NNE,08,M,96,78,87,42,0,0,N

 

 

Latest Fire Weather Watches & Red Flag Warnings (RFWSHV)
   
Latest Fire Danager 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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The National Weather Service Fire Weather Program provides meteorological support to fire management agencies for the protection of life and property. This support includes warnings, forecasts, on-site services during wildfires, and meteorological training for fire fighters.

Fire weather forecasts are issued twice daily, at 7am and 3pm, local time.