Alert archive / Utah / Severe Thunderstorm Warnings in 2014
Severe Thunderstorm Warning 21, NWS Salt Lake City, UT
NWS Salt Lake City, UT issued this severe thunderstorm warning at Aug 8, 2014, 4:53 PM MDT for Box Elder County, Utah. It was in force for 67 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
- Aug 8, 2014, 4:53 PM MDT (22:53 UTC)
- Expired
- Aug 8, 2014, 6:00 PM MDT
- In force
- 67 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), 82 km from the middle of the area, began a volume at 22:54 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
Elko, NV (KLKN), launched 12:00Z, 10.9 hours before the alert went out and 109 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
- -228 J/kg
- Mixed-layer LCL
- 1839 m above ground
- 0-6 km bulk shear
- 13 kt
- 0-1 km storm-relative helicity
- 55 m²/s²
- 0-3 km storm-relative helicity
- 72 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted, in the capitals the NWS used until 2016.
768 WUUS55 KSLC 082253 SVRSLC UTC003-090000- /O.NEW.KSLC.SV.W.0021.140808T2253Z-140809T0000Z/ BULLETIN - IMMEDIATE BROADCAST REQUESTED SEVERE THUNDERSTORM WARNING NATIONAL WEATHER SERVICE SALT LAKE CITY UT 453 PM MDT FRI AUG 8 2014 THE NATIONAL WEATHER SERVICE IN SALT LAKE CITY HAS ISSUED A * SEVERE THUNDERSTORM WARNING FOR... CENTRAL BOX ELDER COUNTY IN UTAH... * UNTIL 600 PM MDT * AT 452 PM MDT...DOPPLER RADAR INDICATED A SEVERE THUNDERSTORM CAPABLE OF PRODUCING DAMAGING WINDS IN EXCESS OF 60 MPH AND DIME SIZED HAIL. THIS STORM WAS LOCATED 12 MILES SOUTH OF PARK VALLEY...OR 39 MILES SOUTHWEST OF SNOWVILLE...AND MOVING EAST AT 20 MPH. * LOCATIONS IMPACTED INCLUDE... LOCOMOTIVE SPRINGS. ADDITIONAL STRONG THUNDERSTORMS ARE DEVELOPING WEST OF THE MAIN STORM AND WILL ALSO BE CAPABLE OF PRODUCING WIND GUSTS IN EXCESS OF 60 MPH AND DIME SIZED HAIL. PRECAUTIONARY/PREPAREDNESS ACTIONS... SEVERE THUNDERSTORMS PRODUCE DAMAGING WINDS...DESTRUCTIVE HAIL... DEADLY LIGHTNING AND VERY HEAVY RAIN. FOR YOUR PROTECTION...MOVE TO AN INTERIOR ROOM ON THE LOWEST FLOOR OF YOUR HOME OR BUSINESS. HEAVY RAINS FLOOD ROADS QUICKLY SO DO NOT DRIVE INTO AREAS WHERE WATER COVERS THE ROAD. && LAT...LON 4144 11359 4163 11369 4190 11294 4159 11280 TIME...MOT...LOC 2252Z 256DEG 17KT 4164 11333 $$ CRK
2 follow-up statements
799 WWUS55 KSLC 082326 SVSSLC SEVERE WEATHER STATEMENT NATIONAL WEATHER SERVICE SALT LAKE CITY UT 526 PM MDT FRI AUG 8 2014 UTC003-090000- /O.CON.KSLC.SV.W.0021.000000T0000Z-140809T0000Z/ BOX ELDER UT- 526 PM MDT FRI AUG 8 2014 ...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 600 PM MDT FOR CENTRAL BOX ELDER COUNTY... AT 525 PM MDT...DOPPLER RADAR INDICATED A SEVERE THUNDERSTORM CAPABLE OF PRODUCING DAMAGING WINDS IN EXCESS OF 60 MPH. THIS STORM WAS LOCATED 15 MILES SOUTH OF PARK VALLEY...OR 35 MILES SOUTHWEST OF SNOWVILLE...MOVING EAST AT 10 MPH. PENNY SIZE HAIL MAY ALSO ACCOMPANY THE DAMAGING WINDS. LOCATIONS IMPACTED INCLUDE... LOCOMOTIVE SPRINGS. PRECAUTIONARY/PREPAREDNESS ACTIONS... SEVERE THUNDERSTORMS PRODUCE DAMAGING WINDS IN EXCESS OF 60 MPH AND/OR LARGE HAIL AT LEAST ONE INCH IN DIAMETER. FOR YOUR PROTECTION...MOVE TO AN INTERIOR ROOM ON THE LOWEST FLOOR OF YOUR HOME OR BUSINESS. && LAT...LON 4146 11349 4164 11354 4184 11292 4159 11280 TIME...MOT...LOC 2325Z 274DEG 10KT 4161 11322 $$
444
WWUS55 KSLC 082356
SVSSLC
SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE SALT LAKE CITY UT
556 PM MDT FRI AUG 8 2014
UTC003-090006-
/O.EXP.KSLC.SV.W.0021.000000T0000Z-140809T0000Z/
BOX ELDER UT-
556 PM MDT FRI AUG 8 2014
...THE SEVERE THUNDERSTORM WARNING FOR CENTRAL BOX ELDER COUNTY WILL
EXPIRE AT 600 PM MDT...
THE STORM WHICH PROMPTED THE WARNING HAS MOVED OUT OF THE AREA.
THEREFORE THE WARNING WILL BE ALLOWED TO EXPIRE.
LAT...LON 4146 11349 4164 11354 4184 11292 4159 11280
TIME...MOT...LOC 2354Z 256DEG 17KT 4161 11322
$$
CRKThe office that day
Everything else NWS Salt Lake City, UT issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Aug 8, 4:11 PM MDT | Severe Thunderstorm Warning | SLC | Box Elder | 49 min |
| Aug 8, 5:57 PM MDT | Severe Thunderstorm Warning | SLC | Box Elder | 48 min |
Nearby
Severe Thunderstorm Warnings in Utah, 2014Every severe thunderstorm 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.