Alert archive / Idaho / Severe Thunderstorm Warnings in 1990
Severe Thunderstorm Warning 6, NWS Pocatello, ID
NWS Pocatello, ID issued this severe thunderstorm warning at Aug 17, 1990, 2:04 PM MDT for Bannock County, Power County, Idaho. It was in force for 26 min. 3 reports 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
- Aug 17, 1990, 2:04 PM MDT (20:04 UTC)
- Expired
- Aug 17, 1990, 2:30 PM MDT
- In force
- 26 min
- Issued by
- NWS Pocatello, ID
- Area
- Whole counties
Counties Bannock County, ID, Power County, ID
The radar
The WSR-88D network and its archive begin in 1991, so there is no radar volume for this alert.
What was reported inside it
| Time | Report | Where | Remark |
|---|---|---|---|
| Aug 17, 2:12 PM MDT | Tornado F0 | Power, ID | |
| Aug 17, 2:20 PM MDT | Tornado F0 | Power, ID | |
| Aug 17, 2:25 PM MDT | Tornado F2 | Power, ID |
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. Storm Data before 1996 records only tornadoes, thunderstorm wind and hail.
The nearest sounding before it
Salt Lake City I, UT (KSLC), launched 12:00Z, 8.1 hours before the alert went out and 218 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
- 123 J/kg
- Mixed-layer CIN
- -136 J/kg
- Mixed-layer LCL
- 1157 m above ground
- 0-6 km bulk shear
- 31 kt
- 0-1 km storm-relative helicity
- 55 m²/s²
- 0-3 km storm-relative helicity
- 63 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
The text of this product is not in the archive. The NWS text archive before 2002 is incomplete.
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.
In the hours before
Local storm report, Aug 17, 8:40 AM MDT, 5 hours 24 minutes before
PRELIMINARY STORM REPORT
NATIONAL WEATHER SERVICE POCATELLO ID
845 PM MDT THU AUG 16 1990
TIME:(MDT) EVENT...HEAVY RAINS OF 8/16/90...
200 PM SPOTTER AT BANCROFT, CARIBOU COUNTY, REPORTS 2 INCH
RAINFALL IN ONE HOUR FROM THUNDERSTORM.
205 PM CALL TO PALISADES RESERVOIR RECREATION AREA. NO RAIN YET.
300 PM CARIBOU COUNTY SHERIFF IN SODA SPRINGS. HEAVY RAINFALL
BUT NO FLOODING REPORTED.
315 PM CALL TO BONNEVILLE COUNTY SHERIFF IN IDAHO FALLS. NO
REPORTS OF HEAVY RAINFALL.
335 PM OBSERVER ON RAPID CREEK NEAR INKOM. 0.30 INCH OF RAIN
IN PAST HOUR OR SO.
355 PM CALL FROM ONEIDA COUNTY SHERIFF, MALAD CITY, MODERATE
RAIN. NO FLOODING.
ADDITIONAL INFORMATION PERTAINING TO RAINFALL AMOUNTS ON THE 16TH ARE:
1. AT ROBIN, A VILLAGE WEST OF MCCAMMON, THAT FLASH FLOODING OCCURRED
FROM 2 INCHES OR RAIN IN A SHORT PERIOD OF TIME. DRAINAGE DITCHES
WERE OVERFLOWING, OTHERWISE NO MAJOR DAMAGES AS IS AN AGRICULTURAL
AREA.
2. MCCAMMON RECEIVED .43 INCH ON THE 16TH AS WELL AS .48 IN THE NIGHT
OF THE 15TH. (THEY WERE NOT HOME YESTERDAY AFTERNOON.)
WSO PIH...JFThe office that day
Everything else NWS Pocatello, ID issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Aug 17, 1:28 PM MDT | Tornado Warning | PIH | Bannock, Power | 62 min |
| Aug 17, 2:47 PM MDT | Severe Thunderstorm Warning | PIH | Oneida, Power | 58 min |
| Aug 17, 2:47 PM MDT | Severe Thunderstorm Warning | PIH | Bingham, Bonneville | 58 min |
Nearby
Severe Thunderstorm Warnings in Idaho, 1990Every severe thunderstorm warning in 1990
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.