Alert archive / Idaho / Flash Flood Warnings in 2014
Flash Flood Warning 23, NWS Boise, ID
NWS Boise, ID issued this flash flood warning at Aug 13, 2014, 3:45 PM MDT for Elmore County, Idaho. It was in force for 6 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
- Aug 13, 2014, 3:45 PM MDT (21:45 UTC)
- Expired
- Aug 13, 2014, 9:16 PM MDT
- In force
- 6 hr
- Issued by
- NWS Boise, ID
- Area
- Storm-based polygon
- Flood severity
- None
County Elmore County, ID
The radar
The Boise radar (KCBX), 64 km from the middle of the area, began a volume at 21:49 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
Boise Airport, ID (KBOI), launched 12:00Z, 9.8 hours before the alert went out and 64 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
- 114 J/kg
- Mixed-layer CIN
- -245 J/kg
- Mixed-layer LCL
- 1811 m above ground
- 0-6 km bulk shear
- 33 kt
- 0-1 km storm-relative helicity
- 39 m²/s²
- 0-3 km storm-relative helicity
- 92 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 Aug 13, 3:04 PM MDT, 41 minutes earlier.
Area forecast discussion, Aug 13, 3:04 PM MDT, 41 minutes before
AREA FORECAST DISCUSSION NATIONAL WEATHER SERVICE BOISE ID 304 PM MDT WED AUG 13 2014 .SHORT TERM...TONIGHT THROUGH FRIDAY...A SEVERE THUNDERSTORM WATCH IS IN EFFECT UNTIL 8 PM FOR PORTIONS OF SOUTHERN IDAHO. VERY MOIST AND UNSTABLE AIR COMBINE WITH UPPER LEVEL WIND SHEAR WILL WILL HELP DRIVE ISOLATED SEVERE STORMS IN THE WATCH AREA. PRIMARY THREAT IN THE WATCH AREA IS FOR LARGE HAIL AND STRONG WIND GUSTS. SCATTERED SHOWERS AND THUNDERSTORMS IN OTHER AREAS COULD ALSO PRODUCE GUSTY WINDS AND SMALL HAIL THIS EVENING. MOST OF THE THUNDERSTORM ACTIVITY WILL DIMINISH TOWARDS MIDNIGHT AS THE LOWER ATMOSPHERE COOLS OFF. THUNDERSTORMS WILL LIKELY REDEVELOP ACROSS THE AREA AGAIN TOMORROW AFTERNOON. SLIGHTLY DRIER CONDITIONS EXPECTED ON FRIDAY. LONG TERM...FRIDAY NIGHT THROUGH WEDNESDAY...A CHANGE TO A DRY PATTERN IS ON THE WAY. TEMPERATURES ARE EXPECTED TO BE NEAR OR SLIGHTLY ABOVE NORMAL. MODELS MOVE THE UPPER LEVEL TROUGH OUT OF OUR AREA FRIDAY NIGHT WITH SHOWERS ENDING OVER OUR NORTHERN MOUNTAINS BY SATURDAY MORNING. A BRIEF PERIOD OF ZONAL FLOW OVER THE WEEKEND WILL BE FOLLOWED MONDAY AND TUESDAY BY AND UPPER LEVEL RIDGE EXTENDING NORTH OVER SOUTHEAST OREGON AND SOUTHWEST IDAHO. .AVIATION...EXPECT ISOLATED TO SCATTERED THUNDERSTORMS WITH LOCAL MVFR/IFR CONDITIONS AND TERRAIN OBSCURATION IN HEAVY RAIN THROUGH THIS EVENING. GUSTY OUTFLOW WINDS UP TO 45 KTS ARE POSSIBLE. AFTER 06Z THUNDERSTORMS WILL CONTINUE NORTH OF A KBNO-KONO-KTWF LINE... BECOMING ISOLATED OVER THE HIGHER TERRAIN BY THURSDAY AFTERNOON. AWAY FROM THUNDERSTORMS SURFACE WINDS WILL BE VARIABLE 5-15 KTS. WINDS ALOFT WILL BE SOUTHERLY 15-25 KTS UP THROUGH 10K FEET MSL. && && .BOI WATCHES/WARNINGS/ADVISORIES... ID...RED FLAG WARNING UNTIL MIDNIGHT MDT TONIGHT IDZ400>403. OR...RED FLAG WARNING UNTIL 11 PM PDT THIS EVENING ORZ646. && WEATHER.GOV/BOISE SHORT TERM...JB LONG TERM....JT/WH AVIATION.....JT
In the hours before
Local storm report, Aug 13, 11:37 AM MDT, 4 hours 8 minutes before
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE BOISE ID
1137 AM MDT WED AUG 13 2014
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..
0550 PM TSTM WND DMG HAGERMAN 42.82N 114.90W
08/12/2014 GOODING ID NEWSPAPER
POWER POLES DOWN 2 MILES NW OF HAGERMAN.
&&
ABRAUNThe office that day
Everything else NWS Boise, ID issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Aug 12, 9:06 PM MDT | Red Flag Warning | BOI | Adams, Boise, Gem, Idaho, Payette, Valley and 1 more | 27 hr |
| Aug 13, 1:45 PM MDT | Severe Thunderstorm Warning | BOI | Owyhee | 60 min |
| Aug 13, 2:42 PM MDT | Severe Thunderstorm Warning | BOI | Owyhee, Twin Falls | 31 min |
| Aug 13, 3:08 PM MDT | Severe Thunderstorm Warning | BOI | Twin Falls | 67 min |
| Aug 13, 3:23 PM MDT | Severe Thunderstorm Warning | BOI | Elmore, Owyhee | 52 min |
| Aug 13, 3:27 PM MDT | Severe Thunderstorm Warning | BOI | Jerome, Twin Falls | 63 min |
| Aug 13, 4:03 PM MDT | Severe Thunderstorm Warning | BOI | Ada, Elmore | 42 min |
| Aug 13, 4:30 PM MDT | Areal Flood Advisory | BOI | Twin Falls | 3 hr |
| Aug 13, 4:44 PM MDT | Severe Thunderstorm Warning | BOI | Ada, Boise, Elmore | 46 min |
| Aug 13, 4:56 PM MDT | Flash Flood Warning | BOI | Twin Falls | 9 hr |
Nearby
Flash Flood Warnings in Idaho, 2014Every flash flood warning in 2014
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.