Alert archive / Idaho / Flash Flood Warnings in 2009
Flash Flood Warning 8, NWS Boise, ID
NWS Boise, ID issued this flash flood warning at Jun 21, 2009, 3:04 PM MDT for Elmore County, Owyhee County, Idaho. It was in force for 56 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 21, 2009, 3:04 PM MDT (21:04 UTC)
- Expired
- Jun 21, 2009, 4:00 PM MDT
- In force
- 56 min
- Issued by
- NWS Boise, ID
- Area
- Storm-based polygon
- Flood severity
- None
Counties Elmore County, ID, Owyhee County, ID
The radar
The Boise radar (KCBX), 67 km from the middle of the area, began a volume at 21:05 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, 9.1 hours before the alert went out and 269 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.
- Mixed-layer CAPE
- 62 J/kg
- Mixed-layer CIN
- -104 J/kg
- Mixed-layer LCL
- 991 m above ground
- 0-6 km bulk shear
- 40 kt
- 0-1 km storm-relative helicity
- 72 m²/s²
- 0-3 km storm-relative helicity
- 172 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
What forecasters said that day
The local office's own words before this flash flood 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 flash flood warning went out at Jun 21, 2:30 PM MDT, 34 minutes earlier.
Area forecast discussion, Jun 21, 2:30 PM MDT, 34 minutes before
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</html>Hazardous weather outlook, Jun 21, 5:57 AM MDT, 9 hours 7 minutes before
HAZARDOUS WEATHER OUTLOOK...CORRECTED NATIONAL WEATHER SERVICE BOISE ID 557 AM MDT SUN JUN 21 2009 IDZ011>016-028>030-ORZ061>064-221200- WEST CENTRAL MOUNTAINS-LOWER TREASURE VALLEY ID-BOISE MOUNTAINS- UPPER TREASURE VALLEY-SOUTHWEST HIGHLANDS-WESTERN MAGIC VALLEY- CAMAS PRAIRIE-OWYHEE MOUNTAINS-SOUTHERN TWIN FALLS COUNTY- HARNEY COUNTY-BAKER COUNTY-MALHEUR COUNTY- LOWER TREASURE VALLEY OR- 557 AM MDT SUN JUN 21 2009 /457 AM PDT SUN JUN 21 2009/ THIS HAZARDOUS WEATHER OUTLOOK IS FOR PORTIONS OF SOUTH CENTRAL IDAHO...SOUTHWEST IDAHO...WEST CENTRAL IDAHO...NORTHEAST OREGON AND SOUTHEAST OREGON. .DAY ONE...TODAY AND TONIGHT MORE SHOWERS AND ISOLATED THUNDERSTORMS WILL DEVELOP OVER THE AREA. THESE THUNDERSTORMS MAY BE STRONG OR POSSIBLY SEVERE IN THE TWIN FALLS JEROME AREA THIS AFTERNOON AND EARLY EVENING WITH THE THREAT OF GUSTY WINDS...HAIL AND BRIEF HEAVY RAIN. THE STORM PREDICTION CENTER SAYS THERE IS A SLIGHT RISK OF SEVERE STORMS TODAY IN THE SNAKE RIVER VALLEY GENERALLY EAST OF MOUNTAIN HOME. .SPOTTER ACTIVATION IS NOT ANTICIPATED AT THIS TIME BUT COULD BE USEFUL IF STORMS DEVELOP AND BECOME SEVERE. .DAY TWO...MONDAY THROUGH SATURDAY NO HAZARDOUS WEATHER IS EXPECTED AT THIS TIME SPOTTER ACTIVATION IS NOT NEEDED
In the hours before
Local storm report, Jun 21, 1:26 PM MDT, 1 hour 38 minutes before
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</html>The office that day
Everything else NWS Boise, ID issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jun 21, 2:07 PM MDT | Special Weather Statement | BOI | Gooding | 38 min |
| Jun 21, 3:47 PM MDT | Areal Flood Advisory | BOI | Elmore, Gooding | 3 hr |
| Jun 21, 3:58 PM MDT | Areal Flood Advisory | BOI | Elmore, Owyhee | 3 hr |
Nearby
Flash Flood Warnings in Idaho, 2009Every flash flood warning in 2009
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.