Alert archive / Colorado / Tornado Warnings in 2018
Tornado Warning 51, NWS Denver/Boulder, CO
NWS Denver/Boulder, CO issued this tornado warning at Aug 8, 2018, 6:57 AM MDT for Weld County, Colorado. It was in force for 33 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
- Aug 8, 2018, 6:57 AM MDT (12:57 UTC)
- Expired
- Aug 8, 2018, 7:30 AM MDT
- In force
- 33 min
- Issued by
- NWS Denver/Boulder, CO
- Area
- Storm-based polygon
- Tornado
- Radar indicated
- Hail
- 1.25 in
County Weld County, CO
The radar
The Cheyenne radar (KCYS), 86 km from the middle of the area, began a volume at 12:59 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 (KDEN), launched 12:00Z, 1.0 hours before the alert went out and 111 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
- 965 J/kg
- Mixed-layer CIN
- -187 J/kg
- Mixed-layer LCL
- 1263 m above ground
- 0-6 km bulk shear
- 28 kt
- 0-1 km storm-relative helicity
- 13 m²/s²
- 0-3 km storm-relative helicity
- 43 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.1
The text
As transmitted.
716
WFUS55 KBOU 081257
TORBOU
COC123-081330-
/O.NEW.KBOU.TO.W.0051.180808T1257Z-180808T1330Z/
BULLETIN - EAS ACTIVATION REQUESTED
Tornado Warning
National Weather Service Denver CO
657 AM MDT WED AUG 8 2018
The National Weather Service in Denver Colorado has issued a
* Tornado Warning for...
Northeastern Weld County in northeastern Colorado...
* Until 730 AM MDT.
* At 656 AM MDT, a severe thunderstorm capable of producing a tornado
was located 5 miles east of Keota, or 32 miles north of Fort
Morgan, moving south at 15 mph. A brief tornado was reported 20
minutes ago just northwest of Keota.
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...
New Raymer and Keota.
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 4079 10405 4076 10382 4053 10380 4058 10421
TIME...MOT...LOC 1256Z 010DEG 14KT 4071 10396
TORNADO...RADAR INDICATED
HAIL...1.25IN
$$
SCHLATTER1 follow-up statement
190
WWUS55 KBOU 081318
SVSBOU
Severe Weather Statement
National Weather Service Denver CO
718 AM MDT WED AUG 8 2018
COC123-081330-
/O.CON.KBOU.TO.W.0051.000000T0000Z-180808T1330Z/
Weld CO-
718 AM MDT WED AUG 8 2018
...A TORNADO WARNING REMAINS IN EFFECT UNTIL 730 AM MDT FOR EAST
CENTRAL WELD COUNTY...
At 717 AM MDT, a severe thunderstorm capable of producing a tornado
was located 7 miles southeast of Keota, or 26 miles north of Fort
Morgan, moving south at 15 mph.
HAZARD...Tornado and half dollar size hail.
SOURCE...Radar indicated rotation.
IMPACT...Flying debris will be dangerous to those caught without
shelter. Mobile homes will be damaged or destroyed. Damage
to roofs, windows, and vehicles will occur. Tree damage is
likely.
This tornadic thunderstorm will remain over mainly rural areas of
east central Weld County, which includes Buckingham.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
TAKE COVER NOW! Move to a basement or an interior room on the lowest
floor of a sturdy building. Avoid windows. If you are outdoors, in a
mobile home, or in a vehicle, move to the closest substantial shelter
and protect yourself from flying debris.
&&
LAT...LON 4070 10408 4067 10386 4054 10385 4058 10421
TIME...MOT...LOC 1317Z 010DEG 14KT 4063 10398
TORNADO...RADAR INDICATED
HAIL...1.25IN
$$
GIMMESTADThe office that day
Everything else NWS Denver/Boulder, CO issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Aug 7, 6:07 PM MDT | Severe Thunderstorm Warning | BOU | Washington | 38 min |
| Aug 7, 6:14 PM MDT | Severe Thunderstorm Warning | BOU | Adams, Denver | 27 min |
| Aug 7, 7:24 PM MDT | Severe Thunderstorm Warning | BOU | Adams, Arapahoe | 19 min |
| Aug 8, 12:13 AM MDT | Special Weather Statement | BOU | Lincoln | 47 min |
| Aug 8, 4:46 AM MDT | Special Weather Statement | BOU | Logan | 44 min |
| Aug 8, 5:52 AM MDT | Special Weather Statement | BOU | Logan | 38 min |
| Aug 8, 5:56 AM MDT | Special Weather Statement | BOU | Washington | 34 min |
| Aug 8, 6:17 AM MDT | Severe Thunderstorm Warning | BOU | Weld | 43 min |
| Aug 8, 6:27 AM MDT | Tornado Warning | BOU | Weld | 33 min |
| Aug 8, 7:28 AM MDT | Severe Thunderstorm Warning | BOU | Morgan, Weld | 47 min |
| Aug 8, 8:17 AM MDT | Special Weather Statement | BOU | Morgan | 28 min |
| Aug 8, 8:30 AM MDT | Special Weather Statement | BOU | Elbert | 45 min |
| Aug 8, 8:58 AM MDT | Severe Thunderstorm Warning | BOU | Elbert | 47 min |
| Aug 8, 9:39 AM MDT | Severe Thunderstorm Warning | BOU | Elbert, Lincoln | 33 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.