Alert archive / Colorado / Severe Thunderstorm Warnings in 2012
Severe Thunderstorm Warning 86, NWS Denver/Boulder, CO
NWS Denver/Boulder, CO issued this severe thunderstorm warning at Jul 17, 2012, 3:41 PM MDT for Logan County, Phillips County, Colorado. It was in force for 49 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
- Jul 17, 2012, 3:41 PM MDT (21:41 UTC)
- Expired
- Jul 17, 2012, 4:30 PM MDT
- In force
- 49 min
- Issued by
- NWS Denver/Boulder, CO
- Area
- Storm-based polygon
- Hail
- 1.0 in
- Wind
- 50.0 mph
Counties Logan County, CO, Phillips County, CO
The radar
The Goodland radar (KGLD), 161 km from the middle of the area, began a volume at 21:43 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
Denver, CO (KDNR), launched 12:00Z, 9.7 hours before the alert went out and 101 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
- 2376 m above ground
- 0-6 km bulk shear
- 13 kt
- 0-1 km storm-relative helicity
- -15 m²/s²
- 0-3 km storm-relative helicity
- 79 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted, in the capitals the NWS used until 2016.
039
WUUS55 KBOU 172141
SVRBOU
COC075-095-172230-
/O.NEW.KBOU.SV.W.0086.120717T2141Z-120717T2230Z/
BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE DENVER CO
341 PM MDT TUE JUL 17 2012
THE NATIONAL WEATHER SERVICE IN DENVER HAS ISSUED A
* SEVERE THUNDERSTORM WARNING FOR...
NORTHWESTERN PHILLIPS COUNTY IN NORTHEAST COLORADO
EAST CENTRAL LOGAN COUNTY IN NORTHEAST COLORADO
* UNTIL 430 PM MDT
* AT 341 PM MDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
SEVERE THUNDERSTORM CAPABLE OF PRODUCING ONE INCH DIAMETER HAIL.
THIS STORM WAS LOCATED 4 MILES NORTH OF HAXTUN...OR 18 MILES
NORTHWEST OF HOLYOKE...MOVING SOUTH-SOUTHWEST AT 15 MPH.
* LOCATIONS IN THE WARNING INCLUDE BUT ARE NOT LIMITED TO PAOLI...
HIGHLAND CENTER...HAXTUN AND FAIRFIELD.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
IF SEVERE WEATHER APPROACHES YOUR AREA...GO INSIDE A STURDY SHELTER
AWAY FROM CREEK BEDS AND OTHER FLOOD-PRONE AREAS. REMEMBER...A SEVERE
THUNDERSTORM CAN PRODUCE LARGE DAMAGING HAIL...DAMAGING WINDS IN
EXCESS OF 58 MPH...DEADLY LIGHTNING...AND VERY HEAVY RAIN.
&&
LAT...LON 4074 10241 4058 10248 4053 10256 4051 10270
4056 10276 4065 10275 4071 10270 4074 10263
TIME...MOT...LOC 2141Z 027DEG 16KT 4068 10262
WIND...HAIL <50MPH 1.00IN
$$1 follow-up statement
851
WWUS55 KBOU 172249
SVSBOU
SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE DENVER CO
449 PM MDT TUE JUL 17 2012
COC075-095-172233-
/O.EXP.KBOU.SV.W.0086.000000T0000Z-120717T2230Z/
PHILLIPS CO-LOGAN CO-
449 PM MDT TUE JUL 17 2012
...THE SEVERE THUNDERSTORM WARNING FOR EAST CENTRAL LOGAN AND
NORTHWESTERN PHILLIPS COUNTIES WILL EXPIRE AT 430 PM MDT...
THE THUNDERSTORM THAT PROMPTED THE WARNING HAS EXITED THE AREA.
THERE WERE NO REPORTS OF SEVERE WEATHER.
LAT...LON 4074 10241 4058 10248 4053 10256 4051 10270
4056 10276 4065 10275 4071 10270 4074 10263
TIME...MOT...LOC 2223Z 027DEG 16KT 4051 10273
$$Nearby
Severe Thunderstorm Warnings in Colorado, 2012Every severe thunderstorm warning in 2012
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.