Alert archive / Colorado / Special Weather Statements in 2017
Special Weather Statement, NWS Denver/Boulder, CO
NWS Denver/Boulder, CO issued this special weather statement at Aug 14, 2017, 10:02 PM MDT for Washington County, Colorado. It was in force for 58 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 14, 2017, 10:02 PM MDT (04:02 UTC)
- Expired
- Aug 14, 2017, 11:00 PM MDT
- In force
- 58 min
- Issued by
- NWS Denver/Boulder, CO
County Washington County, CO
The radar
The Denver radar (KFTG), 110 km from the middle of the area, began a volume at 04:03 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 00:00Z, 4.0 hours before the alert went out and 40 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
- 54 J/kg
- Mixed-layer CIN
- -12 J/kg
- Mixed-layer LCL
- 3288 m above ground
- 0-6 km bulk shear
- 23 kt
- 0-1 km storm-relative helicity
- 6 m²/s²
- 0-3 km storm-relative helicity
- 19 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
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 Aug 14, 9:42 PM MDT, 20 minutes earlier.
Area forecast discussion, Aug 14, 9:42 PM MDT, 20 minutes before
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</html>Hazardous weather outlook, Aug 14, 10:15 AM MDT, 11 hours 47 minutes before
Hazardous Weather Outlook National Weather Service Denver/Boulder CO 1015 AM MDT Mon Aug 14 2017 COZ030>051-151615- 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- 1015 AM MDT Mon Aug 14 2017 This hazardous weather outlook is for northeast and north central Colorado. .DAY ONE...Today and Tonight Scattered thunderstorms will develop by early afternoon with some of them spreading across the urban corridor by mid to late afternoon and across the plains by early evening. The majority of storms will produce wind gusts to 40 mph, small hail and brief moderate to heavy rain. A few stronger storms may occur over the far northeast plains this evening. These storms may produce heavy rain, winds gusts to 60 mph and nickel size hail. .DAYS TWO THROUGH SEVEN...Tuesday through Sunday The chance for thunderstorms will increase on Tuesday, especially across the far northeast plains of Colorado where a few storms during the late afternoon and early evening hours could turn severe. Large hail and damaging winds will be the main threat from these storms. The rest of the week will continue to see a chance of afternoon and evening thunderstorms moving out of the foothills and across the plains. Mid and upper level moisture is expected to keep moving across Colorado through the end of the week, and daytime heating will be sufficient each day to produce the showers. Brief rain, gusty winds and small hail will be the main threats from the showers and thunderstorms. .SPOTTER INFORMATION STATEMENT... Spotter activation will not be needed today or tonight.
In the hours before
Special weather statement, Aug 14, 7:53 PM MDT, 2 hours 9 minutes before
Special Weather Statement
National Weather Service Denver CO
753 PM MDT MON AUG 14 2017
COZ044-150245-
Morgan County CO-
753 PM MDT MON AUG 14 2017
...SIGNIFICANT WEATHER ADVISORY FOR CENTRAL MORGAN COUNTY UNTIL 845
PM MDT...
At 753 PM MDT, Doppler radar was tracking a strong thunderstorm 6
miles northwest of Adena School, or 8 miles southwest of Fort Morgan,
and also over Fort Morgan, moving northeast at 10 mph.
Nickel size hail and wind gusts up to 50 mph will be possible with
these storms.
Locations impacted include...
Fort Morgan, Brush, Log Lane Village, Snyder and Adena School.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Prepare for sudden gusty winds. Secure loose objects and move to a
safe shelter inside a building or vehicle.
Torrential rainfall is also occurring with this storm, and may lead
to localized flooding. Do not drive your vehicle through flooded
roadways.
&&
LAT...LON 4008 10390 4019 10398 4042 10377 4033 10357
4015 10357
TIME...MOT...LOC 0153Z 240DEG 9KT 4017 10390
GIMMESTADLocal storm report, Aug 14, 9:11 PM MDT, 51 minutes before
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</html>Special weather statement, Aug 14, 10:02 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 14, 7:53 PM MDT | Special Weather Statement | BOU | Morgan | 52 min |
| Aug 14, 8:15 PM MDT | Areal Flood Advisory | BOU | Morgan | 3 hr |
| Aug 14, 8:29 PM MDT | Severe Thunderstorm Warning | BOU | Logan, Morgan, Washington | 61 min |
| Aug 14, 8:47 PM MDT | Flash Flood Warning | BOU | Morgan | 3 hr |
| Aug 14, 9:08 PM MDT | Severe Thunderstorm Warning | BOU | Morgan, Washington | 52 min |
| Aug 15, 4:01 PM MDT | Severe Thunderstorm Warning | BOU | Weld | 44 min |
| Aug 15, 4:02 PM MDT | Severe Thunderstorm Warning | BOU | Arapahoe, Douglas, Elbert | 43 min |
| Aug 15, 4:08 PM MDT | Severe Thunderstorm Warning | BOU | Lincoln | 52 min |
| Aug 15, 4:44 PM MDT | Severe Thunderstorm Warning | BOU | Weld | 46 min |
| Aug 15, 4:53 PM MDT | Severe Thunderstorm Warning | BOU | Lincoln | 37 min |
| Aug 15, 5:07 PM MDT | Severe Thunderstorm Warning | BOU | Elbert, Lincoln | 38 min |
| Aug 15, 5:12 PM MDT | Areal Flood Advisory | BOU | Douglas | 3 hr |
| Aug 15, 5:27 PM MDT | Severe Thunderstorm Warning | BOU | Morgan, Weld | 53 min |
| Aug 15, 5:34 PM MDT | Areal Flood Advisory | BOU | Weld | 116 min |
| Aug 15, 5:44 PM MDT | Severe Thunderstorm Warning | BOU | Elbert, Lincoln | 46 min |
Nearby
Special Weather Statements in Colorado, 2017Every special weather statement in 2017
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.