Alert archive / Colorado / Tornado Warnings in 2018
Tornado Warning 3, NWS Denver/Boulder, CO
NWS Denver/Boulder, CO issued this tornado warning at May 27, 2018, 3:06 PM MDT for Morgan County, Weld County, Colorado. It was in force for 24 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
- May 27, 2018, 3:06 PM MDT (21:06 UTC)
- Expired
- May 27, 2018, 3:30 PM MDT
- In force
- 24 min
- Issued by
- NWS Denver/Boulder, CO
- Area
- Storm-based polygon
- Tornado
- Radar indicated
- Hail
- 0.75 in
Counties Morgan County, CO, Weld County, CO
The radar
The Denver radar (KFTG), 55 km from the middle of the area, began a volume at 21:08 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 watch it was issued in
The SPC watch in force over the same counties when this warning went out.
| Issued | Product | Office | Lasted |
|---|---|---|---|
| May 27, 1:13 PM MDT | Severe Thunderstorm Watch | SPC | 7 hr |
The nearest sounding before it
Denver, CO (KDEN), launched 12:00Z, 9.1 hours before the alert went out and 90 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
- 4365 m above ground
- 0-6 km bulk shear
- 44 kt
- 0-1 km storm-relative helicity
- 20 m²/s²
- 0-3 km storm-relative helicity
- 105 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted.
729
WFUS55 KBOU 272106
TORBOU
COC087-123-272130-
/O.NEW.KBOU.TO.W.0003.180527T2106Z-180527T2130Z/
BULLETIN - EAS ACTIVATION REQUESTED
Tornado Warning
National Weather Service Denver CO
306 PM MDT SUN MAY 27 2018
The National Weather Service in Denver Colorado has issued a
* Tornado Warning for...
South central Weld County in northeastern Colorado...
West central Morgan County in northeastern Colorado...
* Until 330 PM MDT.
* At 306 PM MDT, a severe thunderstorm capable of producing a tornado
was located 7 miles south of Riverside Reservoir, or 22 miles west
of Fort Morgan, moving north at 10 mph.
HAZARD...Tornado.
SOURCE...Radar indicated rotation.
IMPACT...Expect damage to mobile homes, roofs, and vehicles.
* Locations impacted include...
Riverside Reservoir.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
TAKE COVER NOW! Move to a basement or an interior room on the lowest
floor of a sturdy building. Avoid windows. If you are outdoors, in a
mobile home, or in a vehicle, move to the closest substantial shelter
and protect yourself from flying debris.
&&
LAT...LON 4010 10415 4017 10434 4033 10427 4028 10406
TIME...MOT...LOC 2106Z 199DEG 10KT 4022 10422
TORNADO...RADAR INDICATED
HAIL...<.75IN
$$
RPK1 follow-up statement
180
WWUS55 KBOU 272125
SVSBOU
Severe Weather Statement
National Weather Service Denver CO
325 PM MDT SUN MAY 27 2018
COC087-123-272135-
/O.EXP.KBOU.TO.W.0003.000000T0000Z-180527T2130Z/
Weld CO-Morgan CO-
325 PM MDT SUN MAY 27 2018
...THE TORNADO WARNING FOR SOUTH CENTRAL WELD AND WEST CENTRAL MORGAN
COUNTIES WILL EXPIRE AT 330 PM MDT...
The storm which prompted the warning has weakened below severe
limits, and no longer appears capable of producing a tornado.
Therefore, the warning will be allowed to expire. However small hail
and gusty winds are still possible with this thunderstorm.
A Severe Thunderstorm Watch remains in effect until 800 PM MDT for
northeastern Colorado.
LAT...LON 4010 10415 4017 10434 4033 10427 4028 10406
TIME...MOT...LOC 2125Z 199DEG 10KT 4027 10420
$$
RPKThe office that day
Everything else NWS Denver/Boulder, CO issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| May 27, 12:27 PM MDT | Special Weather Statement | BOU | Larimer | 33 min |
| May 27, 1:45 PM MDT | Tornado Warning | BOU | Adams, Weld | 30 min |
| May 27, 2:14 PM MDT | Severe Thunderstorm Warning | BOU | Weld | 31 min |
| May 27, 2:23 PM MDT | Severe Thunderstorm Warning | BOU | Phillips | 50 min |
| May 27, 2:44 PM MDT | Severe Thunderstorm Warning | BOU | Morgan, Weld | 31 min |
| May 27, 2:47 PM MDT | Severe Thunderstorm Warning | BOU | Lincoln | 31 min |
| May 27, 3:36 PM MDT | Special Weather Statement | BOU | Lincoln | 24 min |
| May 27, 4:20 PM MDT | Severe Thunderstorm Warning | BOU | Washington | 40 min |
| May 27, 4:28 PM MDT | Tornado Warning | BOU | Morgan | 17 min |
| May 27, 4:37 PM MDT | Tornado Warning | BOU | Morgan | 23 min |
| May 27, 4:58 PM MDT | Tornado Warning | BOU | Morgan, Weld | 18 min |
| May 27, 5:21 PM MDT | Special Weather Statement | BOU | Logan | 39 min |
| May 27, 5:38 PM MDT | Severe Thunderstorm Warning | BOU | Logan | 52 min |
Nearby
Tornado Warnings in Colorado, 2018Every tornado warning in 2018Tornadoes in 2018
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.