Alert archive / Colorado / Tornado Warnings in 2018
Tornado Warning 6, NWS Denver/Boulder, CO
NWS Denver/Boulder, CO issued this tornado warning at May 27, 2018, 4:58 PM MDT for Morgan County, Weld County, Colorado. It was in force for 18 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, 4:58 PM MDT (22:58 UTC)
- Expired
- May 27, 2018, 5:16 PM MDT
- In force
- 18 min
- Issued by
- NWS Denver/Boulder, CO
- Area
- Storm-based polygon
- Tornado
- Radar indicated
- Hail
- 1.25 in
Counties Morgan County, CO, Weld County, CO
The radar
The Denver radar (KFTG), 111 km from the middle of the area, began a volume at 23:00 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, 11.0 hours before the alert went out and 85 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.
470
WFUS55 KBOU 272258
TORBOU
COC087-123-272330-
/O.NEW.KBOU.TO.W.0006.180527T2258Z-180527T2330Z/
BULLETIN - EAS ACTIVATION REQUESTED
Tornado Warning
National Weather Service Denver CO
458 PM MDT SUN MAY 27 2018
The National Weather Service in Denver Colorado has issued a
* Tornado Warning for...
East central Weld County in northeastern Colorado...
Northeastern Morgan County in northeastern Colorado...
* Until 530 PM MDT.
* At 457 PM MDT, a severe thunderstorm capable of producing a tornado
was located near Antelope Springs, or 15 miles north of Fort
Morgan, moving north at 25 mph.
HAZARD...Tornado and half dollar size hail.
SOURCE...Radar indicated rotation.
IMPACT...Flying debris will be dangerous to those caught without
shelter. Mobile homes will be damaged or destroyed.
Damage to roofs, windows, and vehicles will occur. Tree
damage is likely.
* Locations impacted include...
Stoneham, New Raymer and Antelope Springs.
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 4058 10358 4053 10358 4052 10357 4039 10355
4040 10393 4047 10395 4072 10389 4072 10360
TIME...MOT...LOC 2257Z 185DEG 23KT 4048 10376
TORNADO...RADAR INDICATED
HAIL...1.25IN
$$
RPK1 follow-up statement
085
WWUS55 KBOU 272316
SVSBOU
Severe Weather Statement
National Weather Service Denver CO
516 PM MDT SUN MAY 27 2018
COC087-123-272326-
/O.CAN.KBOU.TO.W.0006.000000T0000Z-180527T2330Z/
Weld CO-Morgan CO-
516 PM MDT SUN MAY 27 2018
...THE TORNADO WARNING FOR EAST CENTRAL WELD AND NORTHEASTERN MORGAN
COUNTIES IS CANCELLED...
The storm which prompted the warning has weakened below severe
limits, and no longer appears capable of producing a tornado.
Therefore, the warning has been cancelled. However small hail and
gusty winds are still possible with this thunderstorm.
A Severe Thunderstorm Watch remains in effect until 800 PM MDT for
northeastern Colorado.
LAT...LON 4058 10358 4053 10358 4052 10357 4039 10355
4040 10393 4047 10395 4072 10389 4072 10360
TIME...MOT...LOC 2315Z 185DEG 23KT 4060 10375
$$
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, 3:06 PM MDT | Tornado Warning | BOU | Morgan, Weld | 24 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, 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.