Click for Day 1 FireWX Areal Outline Product
ZCZC SPCFWDDY1 ALL
FNUS21 KWNS 170854
DAY 1 FIRE WEATHER OUTLOOK
NWS STORM PREDICTION CENTER NORMAN OK
0354 AM CDT FRI AUG 17 2007
VALID 171200Z - 181200Z
...CRITICAL FIRE WEATHER AREA FOR NV...EASTERN CA...SOUTHWESTERN
ID...SOUTHEASTERN OR...FOR LOW RELATIVE HUMIDITY VALUES AND GUSTY
WINDS...
...CRITICAL FIRE WEATHER AREA FOR SOUTHERN ID...NORTHERN
UT...WESTERN NV...FOR DRY THUNDERSTORMS...
...SYNOPSIS...
A VIGOROUS TROUGH WILL MOVE INTO THE WESTERN UNITED STATES WHILE
ANOTHER TROUGH BEGINS TO EXIT NEW ENGLAND DURING THE FORECAST
PERIOD. AHEAD OF THIS TROUGH...THE COMBINATION OF MID-LEVEL MOISTURE
AND VERTICAL ASCENT WILL HELP CREATE CONDITIONS FOR DRY
THUNDERSTORMS...ESPECIALLY IN UTAH AND IDAHO. FURTHER
WEST...RELATIVE HUMIDITY VALUES WILL DROP INTO THE SINGLE DIGITS
OVER THE GREAT BASIN...AND WITH STRONG WINDS AND HIGH
TEMPERATURES...A FIRE WEATHER RISK WILL EXIST. ELSEWHERE IN THE
COUNTRY...THE REMAINS OF TROPICAL STORM ERIN WILL IMPACT IN THE
SOUTHERN PLAINS WITH HEAVY RAINFALL. A COLD FRONT WILL CONTINUE TO
MOVE SOUTH THROUGH THE EASTERN STATES...AND SOME SEVERE STORMS WILL
BE POSSIBLE IN A LEE TROUGH IN AND AROUND THE DAKOTAS.
...CRITICAL FIRE WEATHER AREA - NV...EASTERN CA...SOUTHWESTERN
ID...SOUTHEASTERN OR...
PRIMARY CONDITIONS: LOW RELATIVE HUMIDITY VALUES...HIGH
TEMPERATURES...GUSTY WINDS...DROUGHT
THIS AREA WILL ONCE AGAIN SEE CRITICAL FIRE WEATHER CONDITIONS AS
RELATIVE HUMIDITY VALUES PLUMMET INTO THE SINGLE DIGITS TO MID TEENS
DURING THE AFTERNOON HOURS...WITH SURFACE TEMPERATURES RISING INTO
THE 90S F. AREAS OF THE REGION WILL SEE STRONG WESTERLY WIND
SPEEDS...FROM 15 TO 20 MPH WITH HIGHER GUSTS...AHEAD OF THE TROUGH
DIGGING INTO THE WESTERN UNITED STATES. THIS AIRMASS HAS EXISTED FOR
SEVERAL DAYS OVER THE AREA...AND SURFACE FUELS IN THIS LONG-TERM
DROUGHT CONDITION REMAIN VERY DRY...CREATING A DANGEROUS FIRE
WEATHER ENVIRONMENT.
...CRITICAL FIRE WEATHER AREA - SOUTHERN ID...NORTHERN UT...WESTERN
NV...
PRIMARY CONDITIONS: DRY THUNDERSTORMS
MID-LEVEL MOISTURE OVER THE REGION...COUPLED WITH A RELATIVELY DRY
BOUNDARY LAYER AND VERTICAL ASCENT FROM IMPULSES MOVING THROUGH THE
EASTERN SIDE OF THE TROUGH...WILL CREATE CONDITIONS FAVORABLE FOR
DRY THUNDERSTORMS. THIS REGION REMAINS IN A LONG-TERM DROUGHT SO
SURFACE FUELS ARE LIKELY VERY DRY...AND LIGHTNING FROM THESE STORMS
COULD IGNITE NEW FIRES. ADDITIONALLY...DOWNDRAFTS FROM THUNDERSTORMS
COULD CAUSE RAPID WIND SPEED AND DIRECTION CHANGES GIVEN TERRAIN
INTERACTIONS...EFFECTING THE BEHAVIOR OF ONGOING FIRES.
...SOUTHEASTERN UNITED STATES...
ONCE AGAIN...AS IN THE PREVIOUS SEVERAL DAYS...SURFACE TEMPERATURES
WILL CLIMB TO NEAR 100 OVER PORTIONS OF THE SOUTHEAST. SURFACE FUELS
CONTINUE TO DRY IN THE HIGH HEAT...BUT LACK OF SIGNIFICANT SURFACE
WIND SPEEDS AND LOW RELATIVE HUMIDITY VALUES WILL HELP TO KEEP THE
FIRE WEATHER RISK BELOW CRITICAL VALUES.
..LEVIT.. 08/17/2007
...PLEASE SEE WWW.SPC.NOAA.GOV/FIRE FOR GRAPHIC PRODUCT...
Click for Day 2 FireWX Areal Outline Product
ZCZC SPCFWDDY2 ALL
FNUS22 KWNS 171059
DAY 2 FIRE WEATHER OUTLOOK CORR 1
NWS STORM PREDICTION CENTER NORMAN OK
0559 AM CDT FRI AUG 17 2007
VALID 181200Z - 191200Z
CORRECTED FOR CRITICAL AREA GEOGRAPHIC DESCRIPTION....CHANGE WESTERN
ID TO EASTERN ID
...CRITICAL FIRE WEATHER AREA FOR NV...EXTREME WESTERN CA...SOUTHERN
UT...SOUTHEASTERN OR...FOR GUSTY WINDS AND LOW RELATIVE HUMIDIFY
VALUES...
...CRITICAL FIRE WEATHER AREA FOR EASTERN ID...NORTHERN
UT...SOUTHWESTERN MT...FOR DRY THUNDERSTORMS...
...SYNOPSIS...
THE TROUGH IN THE WESTERN UNITED STATES WILL CONTINUE TO GRADUALLY
MOVE EASTWARD...CONTINUING THE SAME WEATHER PATTERN OBSERVED AS IN
PREVIOUS DAYS...WITH A DRY THUNDERSTORM POTENTIAL IN THE NORTHERN
ROCKIES AND CRITICAL FIRE WEATHER CONDITIONS THERE ALSO AND IN THE
GREAT BASIN. STORMS AND PRECIPITATION WILL BE POSSIBLE IN THE
MIDWEST AND GREAT LAKES REGION WHILE THE REMNANTS OF TROPICAL STORM
ERIN BRING WIDESPREAD RAINFALL TO THE SOUTHERN PLAINS. IN THE
SOUTHEAST...VERY WARM TEMPERATURES WILL CONTINUE.
...CRITICAL FIRE WEATHER AREA - NV...EXTREME WESTERN CA...SOUTHERN
UT...SOUTHEASTERN OR...
PRIMARY CONDITIONS: LONG-TERM DROUGHT...STRONG SURFACE WINDS...LOW
RELATIVE HUMIDITY VALUES
SURFACE CONDITIONS AHEAD OF THE TROUGH IN THE WESTERN UNITED STATES
WILL CONTINUE TO MEET CRITICAL FIRE WEATHER CONDITIONS. SURFACE
TEMPERATURES IN THE MID TO UPPER 90S F...RELATIVE HUMIDITY VALUES IN
THE SINGLE DIGITS INTO THE MID TO UPPER TEENS...AND SURFACE WIND
SPEEDS AROUND 15 TO 20 MPH WITH AREAS OF HIGHER GUSTS IN COMPLEX
TERRAIN WILL EXIST IN THE THREAT REGION.
...CRITICAL FIRE WEATHER AREA - EASTERN ID...NORTHERN
UT...SOUTHWESTERN MT...
PRIMARY CONDITIONS: DRY THUNDERSTORMS
THE AIRMASS OVER THIS REGION REMAINS RELATIVELY UNCHANGED FROM THE
PAST SEVERAL PREVIOUS FORECAST PERIODS. ONCE AGAIN...MID-LEVEL
MOISTURE WILL CONTINUE TO ADVECT INTO THE REGION FROM THE MONSOONAL
PLUME OVER THE FOUR CORNERS...AND AMPLE ASCENT FROM VARIOUS
SHORTWAVE IMPULSES MOVING THROUGH THE EASTERN EDGE OF THE TROUGH
WILL PROVIDE A FOCUS FOR DRY THUNDERSTORM DEVELOPMENT...WITH THE
SUSTAINED LONG-TERM DROUGHT...SURFACE FUELS WILL BE VERY DRY AND
THUNDERSTORMS COULD IGNITE NEW FIRES. ERRATIC SURFACE WIND SPEED AND
DIRECTION SHIFTS CAN BE EXPECTED FROM DOWNDRAFTS CAUSED BY THESE
STORMS.
...HIGH PLAINS...
A STRONG SURFACE PRESSURE GRADIENT WILL EXIST OVER THE HIGH
PLAINS...CAUSING SOME STRONG SOUTHERLY WIND SPEEDS...WITH VALUES
AROUND 20 MPH SUSTAINED WITH HIGHER GUSTS. RELATIVE HUMIDITY VALUES
IN THE 30 TO 40 PERCENT RANGE AND TEMPERATURES IN THE LOW TO MID 90S
F WILL HELP TO MITIGATE THE FIRE WEATHER THREAT.
...SOUTHEASTERN UNITED STATES...
THE SAME AIR MASS WILL EXIST HERE AS IN PREVIOUS DAYS WITH
TEMPERATURES NEAR OR ABOVE 100 F. SURFACE WIND SPEEDS AND RELATIVE
HUMIDITY VALUES WILL REMAIN BELOW CRITICAL VALUES.
..LEVIT.. 08/17/2007
...PLEASE SEE WWW.SPC.NOAA.GOV/FIRE FOR GRAPHIC PRODUCT...