Alert archive / Utah / Severe Thunderstorm Warnings in 2017
Severe Thunderstorm Warning 3, NWS Salt Lake City, UT
NWS Salt Lake City, UT issued this severe thunderstorm warning at May 6, 2017, 3:28 PM MDT for Box Elder County, Cache County, Utah. It was in force for 47 min. 4 reports came from inside the area while it was in force.
The area
The outline as issued, with what was reported inside it.
The facts
- Issued
- May 6, 2017, 3:28 PM MDT (21:28 UTC)
- Expired
- May 6, 2017, 4:15 PM MDT
- In force
- 47 min
- Issued by
- NWS Salt Lake City, UT
- Area
- Storm-based polygon
Counties Box Elder County, UT, Cache County, UT
The radar
The Salt Lake City radar (KMTX), 51 km from the middle of the area, began a volume at 21:30 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 6, 3:50 PM MDT | TSTM WND GST 59 | 2 Sse Tremonton, UT | I-15 AT TREMONTON, UT28. |
| May 6, 3:50 PM MDT | NON-TSTM WND GST 59 | Elwood, UT | I-15 AT TREMONTON - 4295 FT |
| May 6, 4:10 PM MDT | TSTM WND GST 64 | 1 Wnw Plymouth, UT | I-15 AT PLYMOUTH SENSOR, UT29. |
| May 6, 4:10 PM MDT | NON-TSTM WND GST 64 | Plymouth, UT | I-15 AT PLYMOUTH - 4495 FT |
Local storm reports filed while the alert was in force, from inside its polygon or its counties.
The nearest sounding before it
Salt Lake City I, UT (KSLC), launched 12:00Z, 9.5 hours before the alert went out and 106 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
- 3713 m above ground
- 0-6 km bulk shear
- 34 kt
- 0-1 km storm-relative helicity
- 118 m²/s²
- 0-3 km storm-relative helicity
- 141 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted.
305 WUUS55 KSLC 062128 SVRSLC UTC003-005-062215- /O.NEW.KSLC.SV.W.0003.170506T2128Z-170506T2215Z/ BULLETIN - IMMEDIATE BROADCAST REQUESTED Severe Thunderstorm Warning National Weather Service Salt Lake City UT 328 PM MDT SAT MAY 6 2017 The National Weather Service in Salt Lake City has issued a * Severe Thunderstorm Warning for... Northwestern Cache County in Utah... Northeastern Box Elder County in Utah... * Until 415 PM MDT * At 325 PM MDT, Doppler radar indicated a severe thunderstorm capable of producing damaging winds in excess of 60 mph. This storm was located 7 miles west of Bear River City, or 8 miles southwest of Tremonton, and moving north at 40 mph. * Locations impacted include... Brigham City, Tremonton, Cache, Bear River City, Corinne, Clarkston, Plymouth, Howell, Riverside, Peter, Garland, Honeyville, Elwood, Fielding, Deweyville, Portage, Washakie, Collinston, Promontory and Penrose. 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. If you are in the path of this storm, prepare immediately for damaging winds. People outside should move to a shelter, preferably inside a strong building and away from windows. This storm has a history of producing wind damage. This is a VERY DANGEROUS SITUATION. SEEK SHELTER NOW inside a sturdy structure and stay away from windows! && LAT...LON 4151 11202 4147 11257 4200 11267 4200 11200 TIME...MOT...LOC 2125Z 179DEG 34KT 4161 11226 $$ GM
2 follow-up statements
518 WWUS55 KSLC 062157 SVSSLC Severe Weather Statement National Weather Service Salt Lake City UT 357 PM MDT SAT MAY 6 2017 UTC003-005-062215- /O.CON.KSLC.SV.W.0003.000000T0000Z-170506T2215Z/ Cache UT-Box Elder UT- 357 PM MDT SAT MAY 6 2017 ...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 415 PM MDT FOR NORTHWESTERN CACHE AND NORTHEASTERN BOX ELDER COUNTIES... At 355 PM MDT, Doppler radar indicated a severe thunderstorm capable of producing damaging winds in excess of 60 mph. This storm was located near Plymouth, or 16 miles northwest of Tremonton, moving north at 40 mph. Locations impacted include... Tremonton, Cache, Clarkston, Plymouth, Howell, Riverside, Peter, Garland, Fielding, Portage, Washakie, Collinston and Bothwell. PRECAUTIONARY/PREPAREDNESS ACTIONS... Severe thunderstorms produce damaging winds, destructive hail, deadly lightning and very heavy rain. For your protection move to an interior room on the lowest floor of your home or business. Heavy rains flood roads quickly so do not drive into areas where water covers the road. This storm has a history of producing wind damage. SEEK SHELTER NOW inside a sturdy structure and stay away from windows! && LAT...LON 4172 11201 4172 11261 4200 11267 4200 11200 TIME...MOT...LOC 2155Z 179DEG 34KT 4190 11227 $$ GM
413
WWUS55 KSLC 062209
SVSSLC
Severe Weather Statement
National Weather Service Salt Lake City UT
409 PM MDT SAT MAY 6 2017
UTC003-005-062218-
/O.EXP.KSLC.SV.W.0003.000000T0000Z-170506T2215Z/
Cache UT-Box Elder UT-
409 PM MDT SAT MAY 6 2017
...THE SEVERE THUNDERSTORM WARNING FOR NORTHWESTERN CACHE AND
NORTHEASTERN BOX ELDER COUNTIES WILL EXPIRE AT 415 PM MDT...
The storm which prompted the warning has weakened below severe
limits, and no longer poses an immediate threat to life or property.
Therefore the warning will be allowed to expire. However gusty winds
in the 40 to 50 mph range are still possible with this thunderstorm.
LAT...LON 4172 11201 4172 11261 4200 11267 4200 11200
TIME...MOT...LOC 2208Z 179DEG 34KT 4200 11227
$$
GMThe office that day
Everything else NWS Salt Lake City, UT issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| May 6, 10:42 AM MDT | Areal Flood Warning | SLC | Weber | 7 days |
| May 6, 12:52 PM MDT | Special Weather Statement | SLC | Utah | 38 min |
| May 6, 1:55 PM MDT | Special Weather Statement | SLC | Box Elder | 50 min |
| May 6, 1:58 PM MDT | Special Weather Statement | SLC | Salt Lake | 47 min |
| May 6, 2:32 PM MDT | Special Weather Statement | SLC | Wayne | 58 min |
| May 6, 2:41 PM MDT | Severe Thunderstorm Warning | SLC | Box Elder, Davis, Weber | 49 min |
| May 6, 3:14 PM MDT | High Wind Warning | SLC | 5 hr | |
| May 6, 3:54 PM MDT | Severe Thunderstorm Warning | SLC | Emery, Wayne | 25 min |
Nearby
Severe Thunderstorm Warnings in Utah, 2017Every severe thunderstorm warning in 2017
Sources
The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.