Alert archive / Idaho / Severe Thunderstorm Warnings in 1997
Severe Thunderstorm Warning 13, NWS Boise, ID
NWS Boise, ID issued this severe thunderstorm warning at May 16, 1997, 5:33 PM MDT for Adams County, Idaho. It was in force for 57 min. 1 report came from inside the area while it was in force.
The area
The counties it named, with what was reported inside it.
The facts
- Issued
- May 16, 1997, 5:33 PM MDT (23:33 UTC)
- Expired
- May 16, 1997, 6:30 PM MDT
- In force
- 57 min
- Issued by
- NWS Boise, ID
- Area
- Whole counties
County Adams County, ID
The radar
The Boise radar (KCBX), 157 km from the middle of the area, began a volume at 23:34 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 was reported inside it
| Time | Report | Where | Remark |
|---|---|---|---|
| May 16, 6:30 PM MDT | Hail 0.75 | Council, ID | A severe thunderstorm formed over the Central Mountains and produced 3/4 inch hail . |
NCEI Storm Data entries that began inside the alert's area while it was in force. Before 2003 the local storm report archive is thin, so this is the record of what happened rather than what was phoned in.
The nearest sounding before it
Boise Airport, ID (KBOI), launched 12:00Z, 11.6 hours before the alert went out and 148 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
- 35 J/kg
- Mixed-layer CIN
- -346 J/kg
- Mixed-layer LCL
- 2262 m above ground
- 0-6 km bulk shear
- 14 kt
- 0-1 km storm-relative helicity
- -6 m²/s²
- 0-3 km storm-relative helicity
- 6 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted, in the capitals the NWS used until 2016.
494 WUUS1 KBOI 162335 RRA SVRBOI IDC003-170030- BULLETIN - IMMEDIATE BROADCAST REQUESTED SEVERE THUNDERSTORM WARNING NATIONAL WEATHER SERVICE BOISE ID 533 PM MDT FRI MAY 16 1997 THE NATIONAL WEATHER SERVICE IN BOISE ID HAS ISSUED A SEVERE THUNDERSTORM WARNING EFFECTIVE UNTIL 630 PM MDT FOR PEOPLE IN THE FOLLOWING LOCATION... IN WEST CENTRAL IDAHO ...NORTHERN ADAMS COUNTY AT 530 PM A WEATHER SPOTTER REPORTED A SEVERE THUNDERSTORM CONTAINING LARGE HAIL IN PROGRESS ABOUT 30 MILES NORTHWEST OF COUNCIL. THE STORM WAS MOVING SOUTHEAST THROUGH THE CENTER OF ADAMS COUNTY AND MAY PASS AS CLOSE AS TEN MILES TO THE WEST OF NEW MEADOWS BY 600 PM MDT. THE WEATHER SPOTTER REPORTED HAIL ESTIMATED ABOUT 3/4 INCH IN DIAMETER. IF YOU ARE CAUGHT OUTSIDE...SEEK SHELTER FROM THE WEATHER IN A STRONG BUILDING. DAMAGING WIND...LARGE HAIL...VERY HEAVY RAIN... AND DEADLY LIGHTNING ARE ALL POSSIBLE IN SEVERE THUNDERSTORMS. STAY INSIDE AWAY FROM WINDOWS UNTIL THE STORM HAS PASSED. &
The office that day
Everything else NWS Boise, ID issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| May 15, 6:33 PM MDT | Severe Thunderstorm Warning | BOI | Owyhee | 42 min |
| May 15, 7:15 PM MDT | Severe Thunderstorm Warning | BOI | Owyhee | 45 min |
| May 15, 8:03 PM MDT | Severe Thunderstorm Warning | BOI | Ada, Canyon, Owyhee | 42 min |
| May 15, 8:46 PM MDT | Severe Thunderstorm Warning | BOI | Ada, Owyhee | 59 min |
Nearby
Severe Thunderstorm Warnings in Idaho, 1997Every severe thunderstorm warning in 1997
Sources
The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; verification from NCEI's Storm Data; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.