Alert archive / Idaho / Red Flag Warnings in 2013

Red Flag Warning 3, NWS Boise, ID

July 3, 2013Owyhee County, Twin Falls County, Idaho

NWS Boise, ID issued this red flag warning at Jul 3, 2013, 8:20 AM MDT for Owyhee County, Twin Falls County, Idaho. It took effect at Jul 3, 2013, 3:00 PM MDT. It was in force for 12 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: Jul 3, 2013, 8:20 AM MDT (14:20 UTC)
In effect from: Jul 3, 2013, 3:00 PM MDT
Expired: Jul 4, 2013, 3:00 AM MDT
In force: 12 hr
Issued by: NWS Boise, ID

Counties Owyhee County, ID, Twin Falls County, ID

The radar

The Boise radar (KCBX), 132 km from the middle of the area, began a volume at 14:23 UTC, the scan nearest the moment this went out.

Open the radar archive at this moment

The archived warnings, watches and discussions in force at that minute are drawn over the scan, this one among them.

The nearest sounding before it

Elko, NV (KLKN), launched 12:00Z, 2.3 hours before the alert went out and 205 km from the middle of its area. This is the routine balloon launch nearest before it, the air the forecaster had in hand, not a measurement taken for the alert.

Skew-T log-p

Temperature in red, dew point in green, the mixed-layer parcel dashed.

Hodograph

The wind turning with height, colored by layer: ground to 1 km, 1 to 3 km, 3 to 6 km, 6 to 10 km.

Mixed-layer CAPE: 0 J/kg
Mixed-layer CIN: No buoyant parcel
Mixed-layer LCL: 2538 m above ground
0-6 km bulk shear: 15 kt
0-1 km storm-relative helicity: 36 m²/s²
0-3 km storm-relative helicity: 83 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

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 Boise, ID wrote its last area forecast discussion before this red flag warning went out at Jul 2, 3:15 PM MDT, 17 hours 5 minutes earlier.

Area forecast discussion, Jul 2, 3:15 PM MDT, 17 hours 5 minutes before

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE BOISE ID
315 PM MDT TUE JUL 2 2013

.SHORT TERM...GRADUAL COOLING TREND BUT STILL QUITE HOT THROUGH
THURSDAY AS UPPER LEVEL HIGH PRESSURE BEGINS TO WEAKEN.  HEAT
ADVISORY WILL END WEDNESDAY MORNING IN EASTERN OREGON AS HIGH
TEMPS WEDNESDAY STAY BELOW ADVISORY THRESHOLD.  THE ADVISORY
WILL CONTINUE UNTIL THURSDAY MORNING ON THE IDAHO SIDE.  AIR MASS
REMAINS UNSTABLE ENOUGH FOR AFTERNOON AND EVENING THUNDERSTORMS
THROUGHOUT THE CWA BUT MAINLY IN ERN OREGON...OWYHEE MOUNTAINS...
AND IDAHO ZONES NORTH OF THE SNAKE BASIN.

.LONG TERM...THURSDAY NIGHT THROUGH TUESDAY...AN UPPER LEVEL TROUGH
WILL MOVE ACROSS THE PACIFIC NORTHWEST THURSDAY NIGHT THROUGH FRIDAY
WHICH WILL RESULT IN VALLEY TEMPS IN THE LOWER-MID 90S AND MOUNTAIN
TEMPS IN THE LOWER 80S.  LINGERING MOISTURE ON THE BACK SIDE OF THE
DEPARTING RIDGE WILL ALLOW FOR A SLIGHT CHANCE OF SHOWERS AND
THUNDERSTORMS ALONG THE NEVADA BORDER AND IN THE CENTRAL IDAHO
MOUNTAINS THROUGH THE WEEKEND. MONDAY AND TUESDAY LOOK DRY...BUT
WARMER /MID TO UPPER 90S ACROSS LOWER VALLEYS/ AS THE WESTERN CONUS
RIDGE REAMPLIFIES BEHIND THE EXITING TROUGH.

&&

.AVIATION...VFR UNDER SCT-BKN MID AND HIGH CLOUDS THROUGH 21Z.
SCATTERED MVFR SHOWERS AND IFR THUNDERSTORMS WILL REDEVELOP AFTER
21Z MAINLY ACROSS EASTERN OREGON AND THE HIGHER TERRAIN OF SW IDAHO.
THUNDERSTORMS MAY PRODUCE HEAVY RAIN...SMALL HAIL...AND GUSTY/ERRATIC
WINDS. LIGHT SURFACE WINDS /GENERALLY 10 KTS OR LESS/ EXCEPT IN THE
VICINITY STORMS. VARIABLE WINDS ALOFT WILL AVERAGE 12 KTS OR LESS
UP TO 10K FEET MSL.

HOT TEMPERATURES THROUGH WEDNESDAY WILL INCREASE DENSITY ALTITUDE -
MAKING SHORTER HIGH-ELEVATION BACKCOUNTRY STRIPS MORE TECHNICAL.
PLAN ACCORDINGLY.

&&

.BOI WATCHES/WARNINGS/ADVISORIES...
ID...HEAT ADVISORY UNTIL 10 AM MDT THURSDAY IDZ012-014-016-033.
OR...HEAT ADVISORY UNTIL 9 AM PDT WEDNESDAY ORZ063.
     HEAT ADVISORY UNTIL 10 AM MDT THURSDAY ORZ064.
     RED FLAG WARNING FROM 3 PM MDT / 2 PM PDT/ THIS AFTERNOON TO
     MIDNIGHT MDT / 11 PM PDT/ TONIGHT ORZ636-637.

&&

WEATHER.GOV/BOISE

SHORT TERM...LC
LONG TERM....CB/WH
AVIATION.....CB

The office that day

Everything else NWS Boise, ID issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
Jul 2, 6:04 PM MDT	Flash Flood Warning	BOI	Camas	3 hr
Jul 3, 1:35 AM MDT	Special Weather Statement	BOI	Ada	85 min
Jul 3, 3:08 AM MDT	Areal Flood Advisory	BOI	Owyhee	4 hr
Jul 3, 5:40 PM MDT	Special Weather Statement	BOI	Gooding	50 min
Jul 3, 5:57 PM MDT	Special Weather Statement	BOI		48 min

Nearby

Red Flag Warnings in Idaho, 2013 Red Flag Warnings in Oregon, 2013 Every red flag warning in 2013

Sources

The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.