Alert archive / Colorado / Special Weather Statements in 2012
Special Weather Statement, NWS Denver/Boulder, CO
NWS Denver/Boulder, CO issued this special weather statement at Aug 1, 2012, 12:45 PM MDT for Jefferson County, Colorado. It was in force for 30 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 1, 2012, 12:45 PM MDT (18:45 UTC)
- Expired
- Aug 1, 2012, 1:15 PM MDT
- In force
- 30 min
- Issued by
- NWS Denver/Boulder, CO
County Jefferson County, CO
The radar
The Denver radar (KFTG), 51 km from the middle of the area, began a volume at 18:48 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
N. Platte/Lee Bi, NE (KLBF), launched 12:00Z, 6.8 hours before the alert went out and 416 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
- 756 J/kg
- Mixed-layer CIN
- -301 J/kg
- Mixed-layer LCL
- 1649 m above ground
- 0-6 km bulk shear
- 27 kt
- 0-1 km storm-relative helicity
- 212 m²/s²
- 0-3 km storm-relative helicity
- 240 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.3
The text
As transmitted, in the capitals the NWS used until 2016.
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</html>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 1, 9:04 AM MDT, 3 hours 41 minutes earlier.
Area forecast discussion, Aug 1, 9:04 AM MDT, 3 hours 41 minutes before
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</html>Hazardous weather outlook, Aug 1, 10:43 AM MDT, 2 hours 2 minutes before
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</html>In the hours before
Special weather statement, Aug 1, 12:45 PM MDT, 0 minutes before
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</html>The office that day
Everything else NWS Denver/Boulder, CO issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Aug 1, 1:16 PM MDT | Areal Flood Advisory | BOU | Larimer | 89 min |
| Aug 1, 1:38 PM MDT | Flash Flood Warning | BOU | Larimer | 82 min |
| Aug 1, 5:15 PM MDT | Special Weather Statement | BOU | Washington | 30 min |
Nearby
Special Weather Statements in Colorado, 2012Every special weather statement in 2012
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.