Wyoming Fire Weather Zone 280

...RED FLAG WARNING IN EFFECT FROM 11 AM THIS MORNING TO 10 PM MDT
THIS EVENING FOR CASPER DISPATCH...

.DISCUSSION...

...YELLOWSTONE NP AND TETON DISPATCH AREAS (INCLUDES FIRE WEATHER
ZONES 140...414...415...AND 416)...

MIXED WET AND DRY ISOLATED THUNDERSTORMS THIS AFTERNOON AND EVENING
IN ZONES 140 AND 415...RETURNING THURSDAY AND FRIDAY. IT WILL BE TOO
DRY EVERYWHERE ELSE AS MINIMUM RH DROPS BELOW 15 PERCENT...BELOW 10
PERCENT ACROSS SOUTHERN PORTIONS OF THE DISPATCH AREA. WINDS WILL
ALSO INCREASE TODAY WITH FREQUENT GUSTS OVER 25 MPH EXPECTED ACROSS
THE AREA. A COLD FRONT APPROACHES FROM THE WEST THIS EVENING...WHICH
WILL INCREASE THE CHANCE OF A WET SHOWER OR THUNDERSTORM AS WELL AS
DROP TEMPERATURES SIGNIFICANTLY AND RAISE RELATIVE HUMIDITY.
THURSDAY WILL STILL BE ON THE DRY SIDE BUT WINDS WILL BE LIGHTER.

...RAWLINS DISPATCH AREA (INCLUDES FIRE WEATHER ZONES 277...278...
AND 279)...

...STRONG WIND...VERY LOW HUMIDITY...A HAINES INDEX OF 6 AND A DRY
COLD FRONTAL PASSAGE TODAY...

RELATIVE HUMIDITY WILL GENERALLY FALL TO THE SINGLE DIGITS FOR THE
NEXT FEW AFTERNOONS...WITH A VERY UNSTABLE AIRMASS MOVING IN. EXPECT
HAINES INDEX OF 5 OR 6 FOR THE NEXT COUPLE OF DAYS. A DRY COLD FRONT
MOVES IN TONIGHT...MODERATING TEMPERATURES AND RHS SLIGHTLY
ACROSS 277...BUT WINDS WILL BE STRONG FROM THE SOUTHWEST WITH
FREQUENT GUSTS OVER 25 MPH FOR MUCH OF THE DAY TODAY WITH GUSTS OVER
40 MPH POSSIBLE IN FAVORED AREAS OF ZONE 279 THIS AFTERNOON. GUSTY
WIND AND LOW HUMIDITY RETURN ON THURSDAY...BUT THE WINDS WILL BE
LESS GUSTY AND THE RELATIVE HUMIDITY NOT QUITE AS LOW.

...CODY DISPATCH AREA (INCLUDES FIRE WEATHER ZONES 275...276...
282...283...285...286...287...288...AND 289)...

...STRONG WIND...VERY LOW HUMIDITY...A HAINES INDEX OF 6 AND A DRY
COLD FRONTAL PASSAGE TODAY...

IT WILL BE WARM...DRIER AND WINDY TODAY WITH NO THUNDERSTORMS
EXPECTED. RH VALUES COULD DROP INTO THE SINGLE DIGITS ESPECIALLY
ACROSS SOUTHERN PORTIONS OF THE DISPATCH AREA. A DRY COLD FRONT
MOVES THROUGH TONIGHT...LEADING TO DECENT RH RECOVERY OVERNIGHT INTO
THURSDAY MORNING. DRY AND BREEZY CONDITIONS RETURN TO SOUTHERN
PORTIONS OF THE DISPATCH AREA ON THURSDAY...BUT IT WILL BE MUCH MORE
MODERATE AND ABOUT 10 DEGREES COOLER.

...CASPER DISPATCH AREA (INCLUDES FIRE WEATHER ZONES 280...281...
285...289...AND 300)...

...RED FLAG WARNING FOR MUCH OF THE DISPATCH AREA TODAY...

RELATIVE HUMIDITY WILL GENERALLY FALL TO AROUND 10 PERCENT FOR THE
NEXT FEW AFTERNOONS...WITH A VERY UNSTABLE AIRMASS MOVING IN. EXPECT
HAINES INDEX OF 5 OR 6 FOR THE NEXT COUPLE OF DAYS. A DRY COLD FRONT
MOVES IN TONIGHT...MODERATING TEMPERATURES AND RHS SLIGHTLY...BUT
WINDS WILL BE STRONG FROM THE SOUTHWEST WITH FREQUENT GUSTS OVER 25
MPH FOR MUCH OF THE DAY TODAY WITH GUSTS OVER 40 MPH POSSIBLE IN
FAVORED AREAS THIS AFTERNOON. GUSTY WIND AND LOW HUMIDITY RETURN ON
THURSDAY...BUT THE WINDS WILL BE LESS GUSTY AND THE RELATIVE
HUMIDITY NOT QUITE AS LOW.

...THUNDERSTORMS IMPLY STRONG GUSTY AND ERRATIC WINDS...
...HAINES INDEX IS HIGH LEVEL HAINES BOTH DAY AND NIGHT...

NATRONA COUNTY/CASPER BLM-
226 AM MDT WED JUN 19 2013

...RED FLAG WARNING IN EFFECT FROM 11 AM THIS MORNING TO 10 PM MDT
THIS EVENING...

.TODAY...
SKY/WEATHER.........SUNNY.
MAX TEMPERATURE.....85-90.
   24 HR TREND......5 DEGREES WARMER.
MIN HUMIDITY........6 PERCENT.
   24 HR TREND......13 PERCENT DRIER.
20-FOOT WINDS.......BREEZY. SOUTHWEST WINDS 10 TO 15 MPH WITH GUSTS
                    TO AROUND 25 MPH UNTIL 1200...THEN AROUND 25
                    MPH WITH GUSTS TO 40 MPH.
RIDGE TOP WINDS.....SOUTHWEST AROUND 15 MPH UNTIL 1200...THEN
                    AROUND 40 MPH.
LAL.................1.
CHC OF WETTING RAIN.ZERO PERCENT.
TRANSPORT WINDS.....SOUTH 15 TO 20 MPH UNTIL 1200...THEN SOUTHWEST
                    35 TO 45 MPH.
MIXING HEIGHT.......6500-9000 FT AGL UNTIL 1200...THEN 12500-15000
                    FT AGL.
SMOKE DISPERSAL.....VERY GOOD TO EXCELLENT (138000-158000 KNOT-FT)
                    UNTIL 1200...THEN EXCELLENT (326000-346000
                    KNOT-FT).
HAINES INDEX........6 OR HIGH POTENTIAL FOR LARGE PLUME DOMINATED
                    FIRE GROWTH.

.TONIGHT...
SKY/WEATHER.........MOSTLY CLEAR.
MIN TEMPERATURE.....48-53.
   24 HR TREND......2 DEGREES COOLER.
MAX HUMIDITY........45-51 PERCENT.
   24 HR TREND......24 PERCENT DRIER.
HUMIDITY RECOVERY...MODERATE.
20-FOOT WINDS.......BREEZY. SOUTHWEST WINDS 20 TO 25 MPH WITH GUSTS
                    TO AROUND 35 MPH UNTIL 2400...THEN WEST 10 TO
                    15 MPH AND GUSTY.
RIDGE TOP WINDS.....SOUTHWEST AROUND 30 MPH UNTIL 2100...THEN WEST
                    15 TO 20 MPH.
LAL.................1.
CHC OF WETTING RAIN.ZERO PERCENT.
TRANSPORT WINDS.....SOUTHWEST AROUND 35 MPH UNTIL 2100...THEN WEST
                    15 TO 20 MPH.
MIXING HEIGHT.......9000-11500 FT AGL UNTIL 2400...THEN 2000-4500
                    FT AGL.
SMOKE DISPERSAL.....EXCELLENT (276000-296000 KNOT-FT) UNTIL
                    2400...THEN GOOD TO VERY GOOD (82000-102000
                    KNOT-FT).
HAINES INDEX........6 OR HIGH POTENTIAL FOR LARGE PLUME DOMINATED
                    FIRE GROWTH.

.THURSDAY...
SKY/WEATHER.........MOSTLY SUNNY.
MAX TEMPERATURE.....77-82.
   24 HR TREND......7 DEGREES COOLER.
MIN HUMIDITY........8-14 PERCENT.
   24 HR TREND......3 PERCENT WETTER.
20-FOOT WINDS.......WEST WINDS AROUND 10 MPH UNTIL 0900...THEN
                    UPSLOPE/UPVALLEY 5-9 MPH UNTIL 1200...THEN
                    SOUTHWEST 10 TO 15 MPH. GUSTS UP TO 15 MPH
                    UNTIL 1500...THEN 20 MPH.
RIDGE TOP WINDS.....SOUTHWEST 10 TO 15 MPH.
LAL.................1.
CHC OF WETTING RAIN.ZERO PERCENT.
TRANSPORT WINDS.....SOUTHWEST AROUND 15 MPH UNTIL 1500...THEN
                    AROUND 25 MPH.
MIXING HEIGHT.......2500-5000 FT AGL UNTIL 1200...THEN 9000-11500
                    FT AGL.
SMOKE DISPERSAL.....FAIR TO GOOD (46000-66000 KNOT-FT) UNTIL
                    1200...THEN EXCELLENT (224000-244000 KNOT-FT).
HAINES INDEX........5 OR MODERATE POTENTIAL FOR LARGE PLUME
                    DOMINATED FIRE GROWTH.


.FORECAST DAYS 3 THROUGH 7......
.THURSDAY NIGHT...PARTLY CLOUDY. ISOLATED SHOWERS AND THUNDERSTORMS
IN THE EVENING. LOWS AROUND 50. EAST WINDS AROUND 10 MPH.
.FRIDAY...MOSTLY CLEAR. LOWS IN THE UPPER 40S. HIGHS IN THE UPPER
70S. WEST WINDS AROUND 10 MPH.
.SATURDAY...MOSTLY CLEAR WITH SLIGHT CHANCE OF SHOWERS AND
THUNDERSTORMS. LOWS IN THE UPPER 40S. HIGHS IN THE UPPER 70S. WEST
WINDS AROUND 10 MPH.
.SUNDAY...MOSTLY CLEAR. LOWS IN THE LOWER 50S. HIGHS AROUND 80.
SOUTHWEST WINDS AROUND 10 MPH.
.MONDAY THROUGH TUESDAY...MOSTLY CLEAR. LOWS IN THE MID 50S. HIGHS
84 TO 89.
View Complete Fire Weather Zones

Back to Fire Weather Page
USA.gov is the U.S. government's official web portal to all federal, state and local government web resources and services.