Alert archive / Arizona / Red Flag Warnings in 2010

Red Flag Warning 11, NWS Tucson, AZ

May 10, 2010

NWS Tucson, AZ issued this red flag warning at May 10, 2010, 2:31 PM MST. It took effect at May 11, 2010, 11:00 AM MST. It was in force for 9 hr. No storm report in the archive falls inside the area while it was in force.

The area

The counties it named.

The facts

Issued: May 10, 2010, 2:31 PM MST (21:31 UTC)
In effect from: May 11, 2010, 11:00 AM MST
Expired: May 11, 2010, 8:00 PM MST
In force: 9 hr
Issued by: NWS Tucson, AZ

What forecasters said that day

The local office's own words before this red flag warning went out, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.

NWS Tucson, AZ wrote its last area forecast discussion before this red flag warning went out at May 10, 2:15 PM MST, 16 minutes earlier.

Area forecast discussion, May 10, 2:15 PM MST, 16 minutes before

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE TUCSON AZ
215 PM MST MON MAY 10 2010

.SYNOPSIS...BREEZY AND NOT AS WARM TODAY AS A LOW PRESSURE SYSTEM
MOVES EAST. WINDY CONDITIONS TO RETURN TUESDAY AS A STRONGER LOW
PRESSURE SYSTEM MOVES INTO THE GREAT BASIN. THEREAFTER...REMAINING
DRY WITH A GRADUAL WARMING TREND DURING THE LATTER PART OF THE WEEK
AND INTO THE WEEKEND.

&&

.DISCUSSION...CLEAR AND MILD AS A SHORTWAVE RIDGE PHASES THROUGH
TODAY IN BETWEEN SYSTEMS. STILL ENOUGH OF A GRADIENT IN THE BASE OF
A LARGER SCALE MEAN TROUGH POSITION FOR BREEZY AT TIMES
TODAY...ESPECIALLY HIGHER TERRAIN EASTERN ZONES. PROBABLY JUST
ENOUGH FOR A LOW END / BORDERLINE RED FLAG WARNING FOR EASTERN AREAS.

NEXT SYSTEM PUSHING THROUGH THE CENTRAL AND SOUTHERN BASIN LOOKING A
TOUCH STRONGER AND A LITTLE FURTHER SOUTH...SHOULD END UP WITH
STRONGER WINDS FOR TUESDAY THAN WHAT WE SAW YESTERDAY. BASED ON THAT
WE HAVE TRANSITIONED THE FIRE WEATHER WATCH INTO A RED FLAG WARNING
FOR TUESDAY AND ISSUED A WIND ADVISORY FOR WIND PRONE / HIGHER
TERRAIN EASTERN ZONES WITH THE AFTERNOON FORECAST PACKAGE. STILL NO
MOISTURE TO SPEAK OF THIS FAR SOUTH BUT ANOTHER SHOT OF RELATIVELY
COOLER AIR CAN BE EXPECTED.

STILL KIND OF TROUGHY THE SECOND HALF OF THE WEEK BUT OVERALL A NET
GAIN IN HEIGHT AND THICKNESS VALUES AS THINGS FILL WILL MEAN A SLOW
WARMING TREND BACK TO CLIMO AVERAGES BY SATURDAY.

&&

.AVIATION...CLEAR SKIES. WIND TODAY WLY 10-22 KTS WITH GUSTS TO 30
KTS...STRONGEST WINDS EAST OF KTUS. LIGHT DIURNAL TRENDS MOST
LOCATIONS OVERNIGHT...STRONGER WINDS DEVELOPING BY TUESDAY AFTERNOON
WITH ANOTHER SYSTEM BRUSHING BY TO THE NORTH. AVIATION DISCUSSION
NOT UPDATED FOR TAF AMENDMENTS.

&&

.FIRE WEATHER...A LOW PRESSURE SYSTEM TO THE NORTH WILL MOVE RAPIDLY
EASTWARD TODAY. A RED FLAG WARNING WILL REMAIN IN EFFECT UNTIL 7 PM
MST THIS EVENING FOR EASTERN FIRE ZONE 148...OR SOUTHERN GRAHAM
COUNTY...SOUTHERN GREENLEE COUNTY...AND COCHISE COUNTY.

TUESDAY...A STRONGER LOW PRESSURE SYSTEM WILL MOVE INTO THE GREAT
BASIN REGION. THE COMBINATION OF STRONG AND GUSTY WINDS AS WELL AS A
DRY AIR MASS IS EXPECTED TO PRODUCE CRITICAL FIRE WEATHER CONDITIONS
ACROSS MUCH OF THE AREA. THUS...THE FIRE WEATHER WATCH HAS BEEN
TRANSITIONED INTO A RED FLAG WARNING FROM LATE TUESDAY MORNING
THROUGH TUESDAY EVENING FOR FIRE ZONE 146...EASTERN FIRE ZONE
147...AND FIRE ZONE 148...OR ALL OF SOUTHEAST ARIZONA EXCEPT WESTERN
AND CENTRAL PIMA COUNTY.

WEDNESDAY THROUGH SATURDAY...GENERALLY LESS WIND THOUGH STILL SOME
GUSTY WINDS PARTICULARLY DURING THE AFTERNOON AND EVENING HOURS. DRY
CONDITIONS TO PREVAIL THIS PERIOD WITH A GRADUAL WARMING TREND.

&&

.TWC WATCHES/WARNINGS/ADVISORIES...
    RED FLAG WARNING IN EFFECT UNTIL 7 PM MST THIS EVENING EASTERN
     FIRE ZONE 148.
    RED FLAG WARNING IN EFFECT FROM TUESDAY MORNING THROUGH TUESDAY
     EVENING FIRE ZONE 146...EASTERN FIRE ZONE 147...AND FIRE ZONE
     148.
    WIND ADVISORY IN EFFECT FROM TUESDAY MORNING THROUGH TUESDAY
     EVENING AZZ019-030-035.

WEATHER.GOV/TUCSON

Hazardous weather outlook, May 10, 4:10 AM MST, 10 hours 21 minutes before

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The office that day

Everything else NWS Tucson, AZ issued on the same UTC day.

Issued	Product	Office	Lasted
May 10, 2:57 AM MST	Fire Weather Watch	TWC	12 hr
May 10, 2:57 AM MST	Red Flag Warning	TWC	16 hr
May 10, 2:32 PM MST	Wind Advisory	TWC	29 hr

Nearby

Red Flag Warnings in Arizona, 2010 Every red flag warning in 2010

Sources

The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text.