Alert archive / Colorado / Tornado Warnings in 2012
Tornado Warning 24, NWS Denver/Boulder, CO
NWS Denver/Boulder, CO issued this tornado warning at Aug 2, 2012, 6:30 PM MDT for Sedgwick County, Colorado. It was in force for 45 min. 1 report 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
- Aug 2, 2012, 6:30 PM MDT (00:30 UTC)
- Expired
- Aug 2, 2012, 7:15 PM MDT
- In force
- 45 min
- Issued by
- NWS Denver/Boulder, CO
- Area
- Storm-based polygon
County Sedgwick County, CO
The radar
The North Platte radar (KLNX), 171 km from the middle of the area, began a volume at 00:32 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 |
|---|---|---|---|
| Aug 2, 6:43 PM MDT | HAIL 1.75 | 13 Se Julesburg, CO |
Local storm reports filed while the alert was in force, from inside its polygon or its counties.
The nearest sounding before it
N. Platte/Lee Bi, NE (KLBF), launched 00:00Z, 0.5 hours before the alert went out and 128 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
- 1601 J/kg
- Mixed-layer CIN
- -46 J/kg
- Mixed-layer LCL
- 2010 m above ground
- 0-6 km bulk shear
- 30 kt
- 0-1 km storm-relative helicity
- -23 m²/s²
- 0-3 km storm-relative helicity
- 59 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- -0.7
The text
As transmitted, in the capitals the NWS used until 2016.
421
WFUS55 KBOU 030030
TORBOU
COC115-030115-
/O.NEW.KBOU.TO.W.0024.120803T0030Z-120803T0115Z/
BULLETIN - EAS ACTIVATION REQUESTED
TORNADO WARNING
NATIONAL WEATHER SERVICE DENVER CO
630 PM MDT THU AUG 2 2012
THE NATIONAL WEATHER SERVICE IN DENVER HAS ISSUED A
* TORNADO WARNING FOR...
EASTERN SEDGWICK COUNTY IN NORTHEAST COLORADO
* UNTIL 715 PM MDT
* AT 630 PM MDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
SEVERE THUNDERSTORM CAPABLE OF PRODUCING A TORNADO OVER EAST
CENTRAL SEDGWICK COUNTY...OR 10 MILES SOUTHEAST OF JULESBURG. THIS
STORM WAS MOVING SOUTHEAST AT 35 MPH.
* THE SEVERE THUNDERSTORM WILL REMAIN OVER MAINLY RURAL AREAS OF THE
WARNED COUNTY.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
TAKE COVER NOW. MOVE TO AN INTERIOR ROOM ON THE LOWEST FLOOR OF A
STURDY BUILDING. AVOID WINDOWS. IF IN A MOBILE HOME...A VEHICLE OR
OUTDOORS...MOVE TO THE CLOSEST SUBSTANTIAL SHELTER AND PROTECT
YOURSELF FROM FLYING DEBRIS.
&&
LAT...LON 4100 10204 4075 10205 4075 10218 4095 10226
4100 10214 4100 10210 4100 10205
TIME...MOT...LOC 0030Z 330DEG 29KT 4085 10213
$$2 follow-up statements
312
WWUS55 KBOU 030058
SVSBOU
SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE DENVER CO
658 PM MDT THU AUG 2 2012
COC115-030115-
/O.CON.KBOU.TO.W.0024.000000T0000Z-120803T0115Z/
SEDGWICK CO-
658 PM MDT THU AUG 2 2012
...A TORNADO WARNING REMAINS IN EFFECT UNTIL 715 PM MDT FOR
NORTHEASTERN SEDGWICK COUNTY...
AT 658 PM MDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
SEVERE THUNDERSTORM CAPABLE OF PRODUCING A TORNADO. THIS STORM WAS
LOCATED OVER EXTREME EAST CENTRAL SEDGWICK COUNTY...OR 14 MILES SOUTH
OF BIG SPRINGS. THIS STORM WAS MOVING SOUTHEAST AT 20 MPH.
THE SEVERE THUNDERSTORM WILL REMAIN OVER MAINLY RURAL AREAS OF THE
WARNED COUNTY.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
TAKE COVER NOW. MOVE TO AN INTERIOR ROOM ON THE LOWEST FLOOR OF A
STURDY BUILDING. AVOID WINDOWS. IF IN A MOBILE HOME...A VEHICLE OR
OUTDOORS...MOVE TO THE CLOSEST SUBSTANTIAL SHELTER AND PROTECT
YOURSELF FROM FLYING DEBRIS.
&&
LAT...LON 4100 10204 4080 10205 4079 10213 4093 10218
4098 10212 4100 10210
TIME...MOT...LOC 0058Z 321DEG 16KT 4086 10204
$$070
WWUS55 KBOU 030112
SVSBOU
SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE DENVER CO
712 PM MDT THU AUG 2 2012
COC115-030122-
/O.EXP.KBOU.TO.W.0024.000000T0000Z-120803T0115Z/
SEDGWICK CO-
712 PM MDT THU AUG 2 2012
...THE TORNADO WARNING FOR NORTHEASTERN SEDGWICK COUNTY WILL EXPIRE
AT 715 PM MDT...
THE THUNDERSTORM THAT PROMPTED THE WARNING HAS EXITED THE AREA.
LAT...LON 4100 10204 4080 10205 4079 10213 4093 10218
4098 10212 4100 10210
TIME...MOT...LOC 0112Z 321DEG 16KT 4081 10199
$$Nearby
Tornado Warnings in Colorado, 2012Every tornado warning in 2012Tornadoes 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; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.