Alert archive / Idaho / Severe Thunderstorm Warnings in 2015

Severe Thunderstorm Warning 9, NWS Boise, ID

June 28, 2015Ada County, Elmore County, Idaho

NWS Boise, ID issued this severe thunderstorm warning at Jun 28, 2015, 6:08 PM MDT for Ada County, Elmore County, Idaho. It was in force for 37 min. No storm report in the archive falls inside the area while it was in force.

The area

The counties it named.

The facts

Issued: Jun 28, 2015, 6:08 PM MDT (00:08 UTC)
Expired: Jun 28, 2015, 6:45 PM MDT
In force: 37 min
Issued by: NWS Boise, ID
Area: Storm-based polygon

Counties Ada County, ID, Elmore County, ID

The radar

The Boise radar (KCBX), 32 km from the middle of the area, began a volume at 00:10 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.

What forecasters said that day

The local office's own words before this severe thunderstorm 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 severe thunderstorm warning went out at Jun 28, 3:02 PM MDT, 3 hours 6 minutes earlier.

Area forecast discussion, Jun 28, 3:02 PM MDT, 3 hours 6 minutes before

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE BOISE ID
302 PM MDT SUN JUN 28 2015

.SHORT TERM...TONIGHT THROUGH TUESDAY...MID-LEVEL MOISTURE COUPLED
WITH AFTERNOON HEAT AND INSTABILITY WILL CONTINUE TO FEED SHOWER
AND THUNDERSTORM DEVELOPMENT OVER HIGHER TERRAIN. WEAK SHEAR...LIGHT
WINDS ALOFT AND SLIGHTLY MORE STABLE CONDITIONS WILL KEEP SHOWERS
AND STORMS OUT OF LOWER VALLEYS. COLLAPSING SHOWERS/STORMS ARE
LIKELY TO PRODUCE GUSTY OUTFLOW WINDS WITH SPEEDS UP TO 50 MPH
NEAR THE COLLAPSING CELLS. UPPER TROUGH SLOWLY TRACKS THROUGH PAC
NW OVERNIGHT INTO MONDAY. DYNAMICS ALONG THE SOUTHERN TAIL OF THE
TROUGH COUPLED WITH ELEVATED INSTABILITY WILL BE ENOUGH TO KEEP
SHOWERS AND STORMS GOING ACROSS EAST-CENTRAL OREGON AND THE WEST-
CENTRAL ID MTNS TONIGHT AND MONDAY. DRIER CONDITIONS WRAP AROUND
THE RIDGE INTO EASTERN OREGON AND CENTRAL IDAHO ON TUESDAY. THIS
WILL SHIFT THE FOCUS OF SHOWER AND THUNDERSTORM DEVELOPMENT TO
BOISE MTNS AND OR/ID HIGHLANDS ALONG THE NV BORDER. WITH RIDGE
AXIS AND SURFACE THERMAL TROUGH EAST OF THE AREA...MONDAY IS
SEVERAL DEGREES COOLER. ON TUESDAY INCREASED CLOUD COVER WILL TAKE
A COUPLE MORE DEGREES OFF OF TEMPERATURES OVER CENTRAL AND
SOUTHERN ZONES.

.LONG TERM...TUESDAY NIGHT THROUGH SUNDAY...UPPER LEVEL RIDGE
WILL SLOWLY SHIFT WESTWARD ACROSS THE GREAT BASIN. THE CENTER OF
THE RIDGE STAYS WELL SOUTH OF THE AREA /MAINLY IN UTAH AND NEVADA/
KEEPING THE HOTTEST TEMPERATURES SOUTH. NONETHELESS TEMPERATURES
WILL REMAIN 10-15 DEGREES ABOVE NORMAL THROUGH THE EXTENDED
PERIOD.

&&

.AVIATION....VFR WITH SCT-BKN HIGH LEVEL CLOUDS. ISOLATED SHOWERS
AND THUNDERSTORMS THIS AFTERNOON/EVENING IN SE OREGON AND THE HIGHER
TERRAIN OF SW IDAHO. SURFACE WINDS...VARIABLE 12KT OR LESS EXCEPT
GUSTS TO 45KT NEAR THUNDERSTORM OUTFLOWS. WINDS ALOFT...SOUTH-
SOUTHEAST 10-20KT AROUND 10K FEET MSL.

&&

.BOI WATCHES/WARNINGS/ADVISORIES...
ID...HEAT ADVISORY UNTIL 9 PM MDT THIS EVENING IDZ012-014-033.
OR...HEAT ADVISORY UNTIL 9 PM MDT THIS EVENING ORZ064.
     RED FLAG WARNING UNTIL 11 PM PDT THIS EVENING ORZ636-646.

&&

WEATHER.GOV/BOISE

SHORT TERM...DG
LONG TERM....KA
AVIATION.....KA

The office that day

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

Issued	Product	Office	Counties	Lasted
Jun 29, 8:36 AM MDT	Red Flag Warning	BOI	Adams, Idaho, Owyhee, Valley, Washington	15 hr

Nearby

Severe Thunderstorm Warnings in Idaho, 2015 Every severe thunderstorm warning in 2015

Sources

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