Alert archive / Colorado / Severe Thunderstorm Warnings in 2017
Severe Thunderstorm Warning 49, NWS Denver/Boulder, CO
NWS Denver/Boulder, CO issued this severe thunderstorm warning at Jun 27, 2017, 2:17 PM MDT for Washington 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
- Jun 27, 2017, 2:17 PM MDT (20:17 UTC)
- Expired
- Jun 27, 2017, 2:45 PM MDT
- In force
- 28 min
- Issued by
- NWS Denver/Boulder, CO
- Area
- Storm-based polygon
- Hail
- 1.0 in
- Wind
- 60.0 mph
County Washington County, CO
The radar
The Goodland radar (KGLD), 115 km from the middle of the area, began a volume at 20:19 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, 8.3 hours before the alert went out and 31 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
- 34 J/kg
- Mixed-layer CIN
- -526 J/kg
- Mixed-layer LCL
- 2742 m above ground
- 0-6 km bulk shear
- 21 kt
- 0-1 km storm-relative helicity
- 73 m²/s²
- 0-3 km storm-relative helicity
- 95 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted.
503
WUUS55 KBOU 272017
SVRBOU
COC121-272045-
/O.NEW.KBOU.SV.W.0049.170627T2017Z-170627T2045Z/
BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Denver CO
217 PM MDT TUE JUN 27 2017
The National Weather Service in Denver Colorado has issued a
* Severe Thunderstorm Warning for...
Southeastern Washington County in northeastern Colorado...
* Until 245 PM MDT
* At 216 PM MDT, a severe thunderstorm was located near Arickaree
School, or 28 miles north of Flagler, moving east at 30 mph.
HAZARD...60 mph wind gusts and quarter size hail.
SOURCE...Radar indicated.
IMPACT...Hail damage to vehicles is expected. Expect wind damage
to roofs, siding, and trees.
* Locations impacted include...
Arickaree School and Cope.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
For your protection move to an interior room on the lowest floor of a
building.
&&
LAT...LON 3957 10310 3980 10310 3981 10280 3957 10281
TIME...MOT...LOC 2016Z 268DEG 25KT 3970 10302
HAIL...1.00IN
WIND...60MPH
$$
RPK2 follow-up statements
137
WWUS55 KBOU 272031
SVSBOU
Severe Weather Statement
National Weather Service Denver CO
231 PM MDT TUE JUN 27 2017
COC121-272045-
/O.CON.KBOU.SV.W.0049.000000T0000Z-170627T2045Z/
Washington CO-
231 PM MDT TUE JUN 27 2017
...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 245 PM MDT
FOR SOUTHEASTERN WASHINGTON COUNTY...
At 230 PM MDT, a severe thunderstorm was located near Cope, or 28
miles north of Seibert, moving east at 30 mph.
HAZARD...60 mph wind gusts and quarter size hail.
SOURCE...Radar indicated.
IMPACT...Hail damage to vehicles is expected. Expect wind damage to
roofs, siding, and trees.
Locations impacted include...
Cope.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
For your protection move to an interior room on the lowest floor of a
building.
&&
LAT...LON 3957 10302 3980 10300 3981 10280 3957 10281
TIME...MOT...LOC 2030Z 268DEG 25KT 3970 10289
HAIL...1.00IN
WIND...60MPH
$$
RPK528
WWUS55 KBOU 272045
SVSBOU
Severe Weather Statement
National Weather Service Denver CO
245 PM MDT TUE JUN 27 2017
COC121-272055-
/O.EXP.KBOU.SV.W.0049.000000T0000Z-170627T2045Z/
Washington CO-
245 PM MDT TUE JUN 27 2017
...THE SEVERE THUNDERSTORM WARNING FOR SOUTHEASTERN WASHINGTON COUNTY
HAS EXPIRED...
The storm which prompted the warning has moved out of the area.
Therefore the warning has been allowed to expire.
LAT...LON 3957 10302 3980 10300 3981 10280 3957 10281
TIME...MOT...LOC 2045Z 268DEG 25KT 3970 10276
$$
RPKThe office that day
Everything else NWS Denver/Boulder, CO issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jun 26, 7:10 PM MDT | Severe Thunderstorm Warning | BOU | Lincoln | 35 min |
| Jun 26, 7:59 PM MDT | Areal Flood Advisory | BOU | Lincoln | 3 hr |
| Jun 27, 2:07 PM MDT | Special Weather Statement | BOU | Washington | 38 min |
| Jun 27, 5:28 PM MDT | Severe Thunderstorm Warning | BOU | Sedgwick | 32 min |
Nearby
Severe Thunderstorm Warnings in Colorado, 2017Every severe thunderstorm warning 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.