Alert archive / Colorado / Tornado Warnings in 2020

Tornado Warning 1, NWS Denver/Boulder, CO

July 3, 2020Lincoln County, Colorado

NWS Denver/Boulder, CO issued this tornado warning at Jul 3, 2020, 6:32 PM MDT for Lincoln County, Colorado. It was in force for 28 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: Jul 3, 2020, 6:32 PM MDT (00:32 UTC)
Expired: Jul 3, 2020, 7:00 PM MDT
In force: 28 min
Issued by: NWS Denver/Boulder, CO
Area: Storm-based polygon
Tornado: Radar indicated
Hail: 1.0 in

County Lincoln County, CO

The radar

The Denver radar (KFTG), 112 km from the middle of the area, began a volume at 00:33 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 (KDNR), launched 00:00Z, 0.5 hours before the alert went out and 41 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.

Skew-T log-p

Temperature in red, dew point in green, the mixed-layer parcel dashed.

Hodograph

The wind turning with height, colored by layer: ground to 1 km, 1 to 3 km, 3 to 6 km, 6 to 10 km.

Mixed-layer CAPE: 0 J/kg
Mixed-layer CIN: No buoyant parcel
Mixed-layer LCL: 2725 m above ground
0-6 km bulk shear: 17 kt
0-1 km storm-relative helicity: 30 m²/s²
0-3 km storm-relative helicity: 89 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

As transmitted.

559 
WFUS55 KBOU 040032
TORBOU
COC073-040100-
/O.NEW.KBOU.TO.W.0001.200704T0032Z-200704T0100Z/

BULLETIN - EAS ACTIVATION REQUESTED
Tornado Warning
National Weather Service Denver CO
632 PM MDT Fri Jul 3 2020

The National Weather Service in Denver Colorado has issued a

* Tornado Warning for...
  Northeastern Lincoln County in east central Colorado...

* Until 700 PM MDT.
    
* At 632 PM MDT, a severe thunderstorm capable of producing a tornado
  was located 7 miles southwest of Thurman, or 22 miles northwest of
  Flagler, moving southeast at 15 mph.

  HAZARD...Tornado and quarter 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
  northeastern Lincoln County.

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 3938 10336 3951 10346 3957 10336 3957 10319
      3955 10315 3954 10316
TIME...MOT...LOC 0032Z 330DEG 13KT 3954 10334 

TORNADO...RADAR INDICATED
HAIL...1.00IN

$$

ENTREKIN

The office that day

Everything else NWS Denver/Boulder, CO issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
Jul 3, 6:13 PM MDT	Severe Thunderstorm Warning	BOU	Lincoln, Washington	47 min
Jul 3, 6:26 PM MDT	Special Weather Statement	BOU	Weld	49 min
Jul 3, 6:44 PM MDT	Severe Thunderstorm Warning	BOU	Elbert, Lincoln	46 min
Jul 3, 7:01 PM MDT	Severe Thunderstorm Warning	BOU	Lincoln, Washington	44 min
Jul 4, 12:40 PM MDT	Areal Flood Advisory	BOU	Larimer	110 min
Jul 4, 2:35 PM MDT	Special Weather Statement	BOU	Douglas	25 min
Jul 4, 3:13 PM MDT	Areal Flood Advisory	BOU	Douglas	92 min
Jul 4, 3:37 PM MDT	Special Weather Statement	BOU	Denver	38 min
Jul 4, 3:57 PM MDT	Areal Flood Advisory	BOU	Arapahoe	93 min
Jul 4, 4:00 PM MDT	Areal Flood Advisory	BOU	Elbert	90 min
Jul 4, 4:14 PM MDT	Special Weather Statement	BOU	Weld	46 min
Jul 4, 4:15 PM MDT	Flash Flood Warning	BOU	Arapahoe	2 hr
Jul 4, 4:33 PM MDT	Areal Flood Advisory	BOU	Adams, Denver	117 min
Jul 4, 5:17 PM MDT	Areal Flood Advisory	BOU	Adams	88 min
Jul 4, 5:27 PM MDT	Special Weather Statement	BOU	Crowley	48 min

Nearby

Tornado Warnings in Colorado, 2020 Every tornado warning in 2020 Tornadoes in 2020

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.