Alert archive / Utah / Severe Thunderstorm Warnings in 2009
Severe Thunderstorm Warning 13, NWS Salt Lake City, UT
NWS Salt Lake City, UT issued this severe thunderstorm warning at Jun 2, 2009, 7:18 PM MDT for Box Elder County, Utah. It was in force for 27 min. No storm report in the archive falls inside the area while it was in force.
The area
The outline as issued.
The facts
- Issued
- Jun 2, 2009, 7:18 PM MDT (01:18 UTC)
- Expired
- Jun 2, 2009, 7:45 PM MDT
- In force
- 27 min
- Issued by
- NWS Salt Lake City, UT
- Area
- Storm-based polygon
County Box Elder County, UT
The radar
The Salt Lake City radar (KMTX), 75 km from the middle of the area, began a volume at 01:20 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
Salt Lake City I, UT (KSLC), launched 00:00Z, 1.3 hours before the alert went out and 140 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
- 3255 m above ground
- 0-6 km bulk shear
- 24 kt
- 0-1 km storm-relative helicity
- -6 m²/s²
- 0-3 km storm-relative helicity
- 50 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted, in the capitals the NWS used until 2016.
000 WUUS55 KSLC 030118 SVRSLC UTC003-030145- /O.NEW.KSLC.SV.W.0013.090603T0118Z-090603T0145Z/ BULLETIN - EAS ACTIVATION REQUESTED SEVERE THUNDERSTORM WARNING NATIONAL WEATHER SERVICE SALT LAKE CITY UT 718 PM MDT TUE JUN 2 2009 THE NATIONAL WEATHER SERVICE IN SALT LAKE CITY HAS ISSUED A * SEVERE THUNDERSTORM WARNING FOR... NORTHEASTERN BOX ELDER COUNTY IN UTAH * UNTIL 745 PM MDT * AT 717 PM MDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A SEVERE THUNDERSTORM CAPABLE OF PRODUCING QUARTER SIZE HAIL...AND DAMAGING WINDS IN EXCESS OF 60 MPH. THIS STORM WAS LOCATED OVER NORTHEASTERN BOX ELDER COUNTY...OR 9 MILES SOUTHEAST OF SNOWVILLE...AND MOVING NORTHEAST AT 15 MPH. * THE SEVERE THUNDERSTORM WILL BE NEAR... RURAL NORTHEASTERN BOX ELDER COUNTY AROUND 730 PM MDT PRECAUTIONARY/PREPAREDNESS ACTIONS... THIS IS A DANGEROUS STORM. IF YOU ARE IN ITS PATH...PREPARE IMMEDIATELY FOR DAMAGING WINDS...DESTRUCTIVE HAIL...AND DEADLY CLOUD TO GROUND LIGHTNING. PEOPLE OUTSIDE SHOULD MOVE TO A SHELTER... PREFERABLY INSIDE A STRONG BUILDING BUT AWAY FROM WINDOWS. && LAT...LON 4199 11270 4200 11233 4180 11250 4187 11272 TIME...MOT...LOC 0118Z 209DEG 14KT 4190 11256 $$ SEAMAN
2 follow-up statements
000 WWUS55 KSLC 030129 SVSSLC SEVERE WEATHER STATEMENT NATIONAL WEATHER SERVICE SALT LAKE CITY UT 729 PM MDT TUE JUN 2 2009 UTC003-030145- /O.CON.KSLC.SV.W.0013.000000T0000Z-090603T0145Z/ BOX ELDER UT- 729 PM MDT TUE JUN 2 2009 ...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 745 PM MDT FOR NORTHEASTERN BOX ELDER COUNTY... AT 729 PM MDT...NATIONAL WEATHER SERVICE DOPPLER RADAR CONTINUED TO INDICATE A SEVERE THUNDERSTORM CAPABLE OF PRODUCING QUARTER SIZE HAIL...AND DAMAGING WINDS IN EXCESS OF 60 MPH. THIS STORM WAS LOCATED OVER NORTHEASTERN BOX ELDER COUNTY...OR ABOUT 6 MILES SOUTHWEST OF RIDGEDALE...MOVING NORTHEAST AT 15 MPH. THE SEVERE THUNDERSTORM WILL BE NEAR... RURAL NORTHEASTERN BOX ELDER COUNTY AROUND 740 PM MDT LAT...LON 4199 11270 4200 11233 4180 11250 4187 11272 TIME...MOT...LOC 0129Z 209DEG 14KT 4194 11253 $$ SEAMAN
000 WWUS55 KSLC 030140 SVSSLC SEVERE WEATHER STATEMENT NATIONAL WEATHER SERVICE SALT LAKE CITY UT 740 PM MDT TUE JUN 2 2009 UTC003-030150- /O.EXP.KSLC.SV.W.0013.000000T0000Z-090603T0145Z/ BOX ELDER UT- 740 PM MDT TUE JUN 2 2009 ...THE SEVERE THUNDERSTORM WARNING FOR NORTHEASTERN BOX ELDER COUNTY WILL EXPIRE AT 745 PM MDT... THE STORM HAS WEAKENED AND IS NO LONGER SEVERE. THEREFORE THE WARNING HAS BEEN ALLOWED TO EXPIRE. LAT...LON 4199 11270 4200 11233 4180 11250 4187 11272 TIME...MOT...LOC 0140Z 209DEG 14KT 4198 11250 $$ SEAMAN
The office that day
Everything else NWS Salt Lake City, UT issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jun 2, 6:01 PM MDT | Severe Thunderstorm Warning | SLC | Box Elder, Tooele | 59 min |
| Jun 2, 6:20 PM MDT | Severe Thunderstorm Warning | SLC | Tooele | 29 min |
| Jun 2, 6:22 PM MDT | Severe Thunderstorm Warning | SLC | Box Elder | 53 min |
| Jun 2, 7:37 PM MDT | Severe Thunderstorm Warning | SLC | Cache | 38 min |
Nearby
Severe Thunderstorm Warnings in Utah, 2009Every severe thunderstorm 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.