Alert archive / Colorado / Special Weather Statements in 2020

Special Weather Statement, NWS Denver/Boulder, CO

August 3, 2020Jackson County, Colorado

NWS Denver/Boulder, CO issued this special weather statement at Aug 3, 2020, 1:20 PM MDT for Jackson County, Colorado. It was in force for 25 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 3, 2020, 1:20 PM MDT (19:20 UTC)
Expired: Aug 3, 2020, 1:45 PM MDT
In force: 25 min
Issued by: NWS Denver/Boulder, CO

County Jackson County, CO

The radar

The Cheyenne radar (KCYS), 127 km from the middle of the area, began a volume at 19:21 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

Grand Junction, CO (KGJT), launched 12:00Z, 7.3 hours before the alert went out and 261 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: 5 J/kg
Mixed-layer CIN: -542 J/kg
Mixed-layer LCL: 3336 m above ground
0-6 km bulk shear: 26 kt
0-1 km storm-relative helicity: 93 m²/s²
0-3 km storm-relative helicity: 142 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

As transmitted.

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What forecasters said that day

The local office's own words before this special weather statement went out, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.

NWS Denver/Boulder, CO wrote its last area forecast discussion before this special weather statement went out at Aug 3, 9:48 AM MDT, 3 hours 32 minutes earlier.

Area forecast discussion, Aug 3, 9:48 AM MDT, 3 hours 32 minutes before

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Hazardous weather outlook, Aug 3, 10:45 AM MDT, 2 hours 35 minutes before

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In the hours before

Special weather statement, Aug 3, 1:20 PM MDT, 0 minutes before

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The office that day

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

Issued	Product	Office	Counties	Lasted
Aug 2, 6:04 PM MDT	Severe Thunderstorm Warning	BOU	Lincoln	41 min
Aug 2, 6:40 PM MDT	Special Weather Statement	BOU	Crowley	20 min
Aug 2, 6:44 PM MDT	Severe Thunderstorm Warning	BOU	Lincoln	23 min
Aug 2, 7:03 PM MDT	Special Weather Statement	BOU	Elbert	42 min
Aug 2, 7:08 PM MDT	Special Weather Statement	BOU	Crowley	22 min
Aug 2, 7:48 PM MDT	Special Weather Statement	BOU	Elbert	27 min
Aug 2, 8:00 PM MDT	Special Weather Statement	BOU	Elbert	45 min
Aug 2, 8:21 PM MDT	Severe Thunderstorm Warning	BOU	Elbert, Lincoln	39 min
Aug 2, 8:52 PM MDT	Severe Thunderstorm Warning	BOU	Lincoln	38 min
Aug 2, 9:31 PM MDT	Severe Thunderstorm Warning	BOU	Lincoln	25 min
Aug 3, 2:31 PM MDT	Severe Thunderstorm Warning	BOU	Larimer	13 min
Aug 3, 3:10 PM MDT	Special Weather Statement	BOU	Jefferson	50 min
Aug 3, 3:27 PM MDT	Special Weather Statement	BOU	Boulder	48 min
Aug 3, 3:41 PM MDT	Severe Thunderstorm Warning	BOU	Douglas, Jefferson, Park	36 min
Aug 3, 5:09 PM MDT	Severe Thunderstorm Warning	BOU	Elbert	7 min
Aug 3, 5:15 PM MDT	Severe Thunderstorm Warning	BOU	Elbert	30 min
Aug 3, 5:23 PM MDT	Special Weather Statement	BOU	Arapahoe	52 min
Aug 3, 5:56 PM MDT	Special Weather Statement	BOU	Elbert	34 min

Nearby

Special Weather Statements in Colorado, 2020 Every special weather statement 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.