Alert archive / Colorado / Tornado Warnings in 2011
Tornado Warning 17, NWS Denver/Boulder, CO
NWS Denver/Boulder, CO issued this tornado warning at Jun 18, 2011, 1:37 PM MDT for Elbert County, Lincoln County, Colorado. It was in force for 36 min. 3 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
- Jun 18, 2011, 1:37 PM MDT (19:37 UTC)
- Expired
- Jun 18, 2011, 2:13 PM MDT
- In force
- 36 min
- Issued by
- NWS Denver/Boulder, CO
- Area
- Storm-based polygon
Counties Elbert County, CO, Lincoln County, CO
What was reported inside it
| Time | Report | Where | Remark |
|---|---|---|---|
| Jun 18, 2:15 PM MDT | HAIL 0.75 | Limon, CO | |
| Jun 18, 2:15 PM MDT | HAIL 1.5 | Limon, CO | |
| Jun 18, 2:16 PM MDT | HAIL 1.5 | Limon, CO |
Local storm reports filed while the alert was in force, from inside its polygon or its counties.
The watch it was issued in
The SPC watch in force over the same counties when this warning went out.
| Issued | Product | Office | Lasted |
|---|---|---|---|
| Jun 18, 12:31 PM MDT | Severe Thunderstorm Watch | SPC | 7 hr |
The nearest sounding before it
Denver, CO (KDNR), launched 12:00Z, 7.6 hours before the alert went out and 75 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
- 110 J/kg
- Mixed-layer CIN
- -160 J/kg
- Mixed-layer LCL
- 1171 m above ground
- 0-6 km bulk shear
- 34 kt
- 0-1 km storm-relative helicity
- 55 m²/s²
- 0-3 km storm-relative helicity
- 52 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted, in the capitals the NWS used until 2016.
858 WFUS55 KBOU 181937 TORBOU COC039-073-182030- /O.NEW.KBOU.TO.W.0017.110618T1937Z-110618T2030Z/ BULLETIN - EAS ACTIVATION REQUESTED TORNADO WARNING NATIONAL WEATHER SERVICE DENVER CO 137 PM MDT SAT JUN 18 2011 THE NATIONAL WEATHER SERVICE IN DENVER HAS ISSUED A * TORNADO WARNING FOR... NORTH CENTRAL LINCOLN COUNTY IN EAST CENTRAL COLORADO EAST CENTRAL ELBERT COUNTY IN EAST CENTRAL COLORADO * UNTIL 230 PM MDT * AT 138 PM MDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A SEVERE THUNDERSTORM CAPABLE OF PRODUCING A TORNADO 11 MILES WEST OF LIMON. THIS STORM WAS MOVING EAST AT 30 MPH. * LOCATIONS IN THE WARNING INCLUDE BUT ARE NOT LIMITED TO LIMON. 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 3943 10363 3922 10360 3918 10392 3935 10397 TIME...MOT...LOC 1938Z 261DEG 25KT 3928 10385 $$
2 follow-up statements
533 WWUS55 KBOU 181947 SVSBOU SEVERE WEATHER STATEMENT NATIONAL WEATHER SERVICE DENVER CO 147 PM MDT SAT JUN 18 2011 COC039-073-182030- /O.CON.KBOU.TO.W.0017.000000T0000Z-110618T2030Z/ LINCOLN CO-ELBERT CO- 147 PM MDT SAT JUN 18 2011 ...A TORNADO WARNING REMAINS IN EFFECT UNTIL 230 PM MDT FOR EAST CENTRAL ELBERT AND NORTH CENTRAL LINCOLN COUNTIES... AT 147 PM MDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A SEVERE THUNDERSTORM CAPABLE OF PRODUCING A TORNADO. THIS STORM WAS LOCATED 5 MILES SOUTHEAST OF CEDAR POINT...OR 5 MILES WEST OF LIMON. THIS STORM WAS MOVING EAST AT 30 MPH. LOCATIONS REMAINING IN THE WARNING INCLUDE BUT ARE NOT LIMITED TO LIMON. PRECAUTIONARY/PREPAREDNESS ACTIONS... TAKE COVER NOW. MOVE TO AN INTERIOR ROOM ON THE LOWEST FLOOR OF A STURDY BUILDING. AVOID WINDOWS. IF IN A MOBILE HOME...A VEHICLE OR OUTDOORS...MOVE TO THE CLOSEST SUBSTANTIAL SHELTER AND PROTECT YOURSELF FROM FLYING DEBRIS. IN ADDITION TO THE TORNADO...THIS STORM IS CAPABLE OF PRODUCING LARGE DAMAGING HAIL AND DESTRUCTIVE STRAIGHT LINE WINDS. && LAT...LON 3943 10363 3922 10360 3918 10392 3935 10397 TIME...MOT...LOC 1947Z 261DEG 25KT 3929 10377 $$
015 WWUS55 KBOU 182013 SVSBOU SEVERE WEATHER STATEMENT NATIONAL WEATHER SERVICE DENVER CO 213 PM MDT SAT JUN 18 2011 COC039-073-182019- /O.CAN.KBOU.TO.W.0017.000000T0000Z-110618T2030Z/ LINCOLN CO-ELBERT CO- 213 PM MDT SAT JUN 18 2011 ...THE TORNADO WARNING FOR EAST CENTRAL ELBERT AND NORTH CENTRAL LINCOLN COUNTIES IS CANCELLED... THE THUNDERSTORM THAT PROMPTED THE TORNADO WARNING IS NO LONGER SHOWING RAPID ROTATION AND IS NOT EXPECTED TO PRODUCE A TORNADO. A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT FOR CENTRAL ELBERT AND NORTH CENTRAL LINCOLN COUNTIES UNTIL 300 PM MDT. LAT...LON 3943 10363 3922 10360 3918 10392 3935 10397 TIME...MOT...LOC 2009Z 261DEG 25KT 3931 10357 $$
The office that day
Everything else NWS Denver/Boulder, CO issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jun 17, 6:03 PM MDT | Special Weather Statement | BOU | Lincoln | 27 min |
| Jun 18, 12:14 PM MDT | Severe Thunderstorm Warning | BOU | Elbert | 46 min |
| Jun 18, 12:32 PM MDT | Severe Thunderstorm Warning | BOU | Adams, Arapahoe, Washington | 43 min |
| Jun 18, 12:57 PM MDT | Severe Thunderstorm Warning | BOU | Arapahoe, Elbert | 48 min |
| Jun 18, 1:20 PM MDT | Severe Thunderstorm Warning | BOU | Arapahoe, Washington | 40 min |
| Jun 18, 1:39 PM MDT | Severe Thunderstorm Warning | BOU | Washington | 66 min |
| Jun 18, 2:08 PM MDT | Severe Thunderstorm Warning | BOU | Elbert, Lincoln | 52 min |
| Jun 18, 2:27 PM MDT | Severe Thunderstorm Warning | BOU | Lincoln | 48 min |
| Jun 18, 2:46 PM MDT | Tornado Warning | BOU | Lincoln | 29 min |
| Jun 18, 3:15 PM MDT | Severe Thunderstorm Warning | BOU | Lincoln | 30 min |
| Jun 18, 5:25 PM MDT | Special Weather Statement | BOU | Logan, Phillips, Sedgwick | 65 min |
Nearby
Tornado Warnings in Colorado, 2011Every tornado warning in 2011Tornadoes in 2011
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.