Alert archive / Idaho / Tornado Warnings in 1986
Tornado Warning 1, NWS Pocatello, ID
NWS Pocatello, ID issued this tornado warning at May 21, 1986, 5:40 PM MDT for Franklin County, Oneida County, Idaho. It was in force for 50 min.
The area
The counties it named.
The facts
- Issued
- May 21, 1986, 5:40 PM MDT (23:40 UTC)
- Expired
- May 21, 1986, 6:30 PM MDT
- In force
- 50 min
- Issued by
- NWS Pocatello, ID
- Area
- Whole counties
Counties Franklin County, ID, Oneida County, ID
The radar
The WSR-88D network and its archive begin in 1991, so there is no radar volume for this alert.
The nearest sounding before it
Salt Lake City I, UT (KSLC), launched 12:00Z, 11.7 hours before the alert went out and 158 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
- 0 J/kg
- Mixed-layer CIN
- No buoyant parcel
- Mixed-layer LCL
- 2094 m above ground
- 0-6 km bulk shear
- 45 kt
- 0-1 km storm-relative helicity
- 115 m²/s²
- 0-3 km storm-relative helicity
- 271 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 tornado warning went out, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.
In the hours before
Special weather statement, May 21, 2:31 PM MDT, 3 hours 9 minutes before
SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE POCATELLO, ID 230 PM MDT WED MAY 21 1986 ...COOLER AIR...GUSTY WINDS MOVING INTO SOUTHEAST IDAHO...AGAIN... COOLER AIR AND GUSTY WESTERLY WINDS ARE MOVING INTO SOUTHEAST IDAHO THIS AFTERNOON...ALONG A COLD FRONT THAT EXTENDED FROM NEAR SALMON TO NEAR BURLEY AT 230 PM MDT. TEMPERATURES ARE ALREADY DROPPING AT POCATELLO AIRPORT AND SKIES ARE DARKENING TO THE WEST. A HIGH OF 60 DEGREES WAS REACHED NEAR NOON. THE MAIN FRONT WITH STRONG GUSTY WINDS AND COOLER TEMPERATURES WILL LIKELY REACH POCATELLO AND THE UPPER SNAKE RIVER VALLEY WITHIN THE NEXT HOUR OR TWO. RAIN WILL ACCOMPANY THE SYSTEM...BECOMING MIXED WITH SNOW AT HIGHER ELEVATIO=NS TONIGHT. GLODO
Special weather statement, May 21, 3:06 PM MDT, 2 hours 34 minutes before
SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE POCATELLO, ID
257 PM MDT WED MAY 21 1986
...RADAR REPORTS STORM APPROACHING ONEIDA COUNTY...
WEATHER RADAR INDICATES A THUNDERSTORM WITH POSSIBLE STRONG WINDS
AND BRIEF HEAVY RAINS ABOUT 35 MILES SOUTHWEST OF MALAD CITY IDAHO...
MOVING NORTHWEST AT ABOUT 25 MILES AN HOUR.
THIS WILL BRING THE STORM INTO ONEIDA COUNTY AND MALAD CITY WITHIN
THE NEXT HOUR OR SO...BETWEEN 3 AND 4 PM MDT.
RESIDENTS ARE ADVISED TO BE PREPARED FOR STRONG WINDS WITH POSSIBLY
HEAVY RAINFALL.
STAY TUNED TO RADIO OR TELEVISON STATIONS FOR ADDITONAL STATEMENTS
OR WARNINGS IF NEEDED. PLEASE REPORT DAMAGING WINDS OR SEVERE
WEATHER TO LOCAL LAW ENFORECEMENT AYGENCIES OR DIRECTLY TO THE
NWS AT...POCATELLO 208-236-6901 OR BOISE 208-334-9860.
GLODOThe office that day
Everything else NWS Pocatello, ID issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| May 20, 6:25 PM MDT | Severe Thunderstorm Warning | PIH | Fremont | 65 min |
| May 21, 3:30 PM MDT | Severe Thunderstorm Warning | PIH | Bannock, Oneida | 90 min |
Nearby
Tornado Warnings in Idaho, 1986Every tornado warning in 1986Tornadoes in 1986
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.