Alert archive / Colorado / Special Weather Statements in 2018
Special Weather Statement, NWS Denver/Boulder, CO
NWS Denver/Boulder, CO issued this special weather statement at Jun 22, 2018, 4:39 PM MDT for Adams County, Colorado. It was in force for 36 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
- Jun 22, 2018, 4:39 PM MDT (22:39 UTC)
- Expired
- Jun 22, 2018, 5:15 PM MDT
- In force
- 36 min
- Issued by
- NWS Denver/Boulder, CO
County Adams County, CO
The radar
The Denver radar (KFTG), 46 km from the middle of the area, began a volume at 22:40 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, 10.7 hours before the alert went out and 70 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
- 709 J/kg
- Mixed-layer CIN
- -235 J/kg
- Mixed-layer LCL
- 1144 m above ground
- 0-6 km bulk shear
- 33 kt
- 0-1 km storm-relative helicity
- 48 m²/s²
- 0-3 km storm-relative helicity
- 22 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- -0.1
The text
As transmitted.
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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 Jun 22, 3:34 PM MDT, 1 hour 5 minutes earlier.
Area forecast discussion, Jun 22, 3:34 PM MDT, 1 hour 5 minutes before
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</html>Hazardous weather outlook, Jun 22, 11:18 AM MDT, 5 hours 21 minutes before
Hazardous Weather Outlook National Weather Service Denver/Boulder CO 1118 AM MDT Fri Jun 22 2018 COZ030>051-231730- Jackson County Below 9000 Feet- West Jackson and West Grand Counties Above 9000 Feet- Grand and Summit Counties Below 9000 Feet- South and East Jackson/Larimer/North and Northeast Grand/ Northwest Boulder Counties Above 9000 Feet- South and Southeast Grand/West Central and Southwest Boulder/ Gilpin/Clear Creek/Summit/North and West Park Counties Above 9000 Feet-Larimer and Boulder Counties Between 6000 and 9000 Feet- Jefferson and West Douglas Counties Above 6000 Feet/Gilpin/Clear Creek/Northeast Park Counties Below 9000 Feet- Central and Southeast Park County- Larimer County Below 6000 Feet/Northwest Weld County- Boulder And Jefferson Counties Below 6000 Feet/West Broomfield County- North Douglas County Below 6000 Feet/Denver/West Adams and Arapahoe Counties/East Broomfield County- Elbert/Central and East Douglas Counties Above 6000 Feet- Northeast Weld County-Central and South Weld County-Morgan County- Central and East Adams and Arapahoe Counties- North and Northeast Elbert County Below 6000 Feet/North Lincoln County- Southeast Elbert County Below 6000 Feet/South Lincoln County- Logan County-Washington County-Sedgwick County-Phillips County- 1118 AM MDT Fri Jun 22 2018 ...SEVERE STORMS POSSIBLE OVER PORTIONS OF NORTHEAST COLORADO THIS AFTERNOON... This hazardous weather outlook is for northeast and north central Colorado. .DAY ONE...Today and Tonight A few severe thunderstorms can be expected across northeast Colorado this afternoon. The main threat will be on the plains east of a line from Greeley to Kiowa. The highest threat from storms today will be large hail and wind gusts to 70 mph. Farther west including the I-25 corridor, we should see a few early to mid afternoon storms, but the threat of any severe weather will be lower. By early evening, most of the storms should have pushed east of the state. A couple showers and storms may linger over the northeast plains, but the threat of severe weather will have diminished considerably as the airmass stabilizes. In the mountains and foothills, after a few morning showers look for drier air and breezy conditions to move in. This will elevate the fire danger, with critical Red Flag conditions over South Park. A fast moving upper level weather disturbance will bring the potential for severe thunderstorms on the plains and high fire danger in the mountains. .DAYS TWO THROUGH SEVEN...Saturday through Thursday Isolated late day showers and thunderstorms are expected on Saturday. An upper level storm will bring more moisture, a good chance of showers and thunderstorms and cooler temperatures Saturday night and Sunday. A little warmer on Monday with a chance of afternoon and evening thunderstorms in the mountains and far eastern plains. Tuesday through Thursday will be warmer and drier with only a slight chance of late day showers and thunderstorms. .SPOTTER INFORMATION STATEMENT... Spotters have been activated. Gimmestad/Cooper
In the hours before
Local storm report, Jun 22, 12:58 PM MDT, 3 hours 41 minutes before
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</html>Local storm report, Jun 22, 1:39 PM MDT, 3 hours before
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</html>Special weather statement, Jun 22, 3:34 PM MDT, 1 hour 5 minutes before
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</html>Special weather statement, Jun 22, 4:39 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 |
|---|---|---|---|---|
| Jun 21, 7:13 PM MDT | Special Weather Statement | BOU | Weld | 62 min |
| Jun 21, 7:27 PM MDT | Special Weather Statement | BOU | Crowley | 33 min |
| Jun 22, 2:37 AM MDT | Red Flag Warning | BOU | Park | 17 hr |
| Jun 22, 10:51 AM MDT | Severe Thunderstorm Warning | BOU | Adams, Arapahoe | 39 min |
| Jun 22, 11:27 AM MDT | Special Weather Statement | BOU | Denver | 48 min |
| Jun 22, 11:53 AM MDT | Severe Thunderstorm Warning | BOU | Washington | 30 min |
| Jun 22, 12:27 PM MDT | Special Weather Statement | BOU | Washington | 48 min |
| Jun 22, 1:37 PM MDT | Special Weather Statement | BOU | Lincoln | 53 min |
| Jun 22, 3:34 PM MDT | Special Weather Statement | BOU | Denver | 41 min |
| Jun 22, 4:17 PM MDT | Special Weather Statement | BOU | Adams, Arapahoe, Denver | 58 min |
| Jun 22, 4:45 PM MDT | Special Weather Statement | BOU | Logan | 45 min |
Nearby
Special Weather Statements in Colorado, 2018Every special weather statement 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.