Alert archive / Colorado / Severe Thunderstorm Warnings in 2014
Severe Thunderstorm Warning 252, NWS Denver/Boulder, CO
NWS Denver/Boulder, CO issued this severe thunderstorm warning at Aug 27, 2014, 8:08 PM MDT for Washington County, Colorado. It was in force for 52 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 27, 2014, 8:08 PM MDT (02:08 UTC)
- Expired
- Aug 27, 2014, 9:00 PM MDT
- In force
- 52 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), 117 km from the middle of the area, began a volume at 02:09 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, 2.1 hours before the alert went out and 27 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
- 81 J/kg
- Mixed-layer CIN
- -160 J/kg
- Mixed-layer LCL
- 1662 m above ground
- 0-6 km bulk shear
- 47 kt
- 0-1 km storm-relative helicity
- 65 m²/s²
- 0-3 km storm-relative helicity
- 165 m²/s²
- Significant tornado parameter
- -0.0
- Supercell composite
- -0.6
The text
As transmitted, in the capitals the NWS used until 2016.
195
WUUS55 KBOU 280208
SVRBOU
COC121-280300-
/O.NEW.KBOU.SV.W.0252.140828T0208Z-140828T0300Z/
BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE DENVER CO
808 PM MDT WED AUG 27 2014
THE NATIONAL WEATHER SERVICE IN DENVER HAS ISSUED A
* SEVERE THUNDERSTORM WARNING FOR...
SOUTHEASTERN WASHINGTON COUNTY IN NORTHEASTERN COLORADO...
* UNTIL 900 PM MDT
* AT 807 PM MDT...A SEVERE THUNDERSTORM WAS LOCATED 8 MILES EAST OF
THURMAN...OR 19 MILES NORTH OF FLAGLER...MOVING EAST AT 20 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 AND ARICKAREE SCHOOL.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
PREPARE IMMEDIATELY FOR LARGE HAIL AND DAMAGING WINDS. PEOPLE OUTSIDE
SHOULD MOVE TO A SHELTER...INSIDE A STRONG BUILDING AND AWAY FROM
WINDOWS.
TORRENTIAL RAINFALL IS OCCURRING WITH THIS STORM...AND MAY LEAD TO
FLASH FLOODING. DO NOT DRIVE YOUR VEHICLE THROUGH FLOODED ROADWAYS.
&&
LAT...LON 3957 10318 3994 10316 3996 10281 3971 10280
3957 10280
TIME...MOT...LOC 0207Z 248DEG 24KT 3958 10305
HAIL...1.00IN
WIND...60MPH
$$
COOPER2 follow-up statements
301
WWUS55 KBOU 280231
SVSBOU
SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE DENVER CO
831 PM MDT WED AUG 27 2014
COC121-280300-
/O.CON.KBOU.SV.W.0252.000000T0000Z-140828T0300Z/
WASHINGTON CO-
831 PM MDT WED AUG 27 2014
...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 900 PM MDT
FOR SOUTHEASTERN WASHINGTON COUNTY...
AT 830 PM MDT...A SEVERE THUNDERSTORM WAS LOCATED NEAR COPE...OR 22
MILES NORTH OF SEIBERT...MOVING EAST AT 20 MPH.
HAZARD...QUARTER SIZE HAIL AND 60 MPH WIND GUSTS.
SOURCE...RADAR INDICATED.
IMPACT...HAIL DAMAGE TO VEHICLES IS EXPECTED. EXPECT WIND DAMAGE TO
ROOFS...SIDING AND TREES.
LOCATIONS IMPACTED INCLUDE...
COPE AND ARICKAREE SCHOOL.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
PREPARE IMMEDIATELY FOR LARGE HAIL AND DAMAGING WINDS. PEOPLE OUTSIDE
SHOULD MOVE TO A SHELTER...INSIDE A STRONG BUILDING AND AWAY FROM
WINDOWS.
TORRENTIAL RAINFALL IS OCCURRING WITH THIS STORM...AND MAY LEAD TO
FLASH FLOODING. DO NOT DRIVE YOUR VEHICLE THROUGH FLOODED ROADWAYS.
&&
LAT...LON 3957 10306 3994 10311 3996 10281 3971 10280
3957 10280
TIME...MOT...LOC 0230Z 253DEG 27KT 3962 10283
HAIL...1.00IN
WIND...60MPH
$$
COOPER279
WWUS55 KBOU 280251
SVSBOU
SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE DENVER CO
851 PM MDT WED AUG 27 2014
COC121-280301-
/O.EXP.KBOU.SV.W.0252.000000T0000Z-140828T0300Z/
WASHINGTON CO-
851 PM MDT WED AUG 27 2014
...THE SEVERE THUNDERSTORM WARNING FOR SOUTHEASTERN WASHINGTON COUNTY
WILL EXPIRE AT 900 PM MDT...
THE STORM WHICH PROMPTED THE WARNING HAS EXITED THE WARNED AREA.
THEREFORE THE WARNING WILL BE ALLOWED TO EXPIRE. HOWEVER SMALL
HAIL....GUSTY WINDS AND HEAVY RAIN ARE STILL POSSIBLE WITH THIS
THUNDERSTORM.
TO REPORT SEVERE WEATHER...CONTACT YOUR NEAREST LAW ENFORCEMENT
AGENCY. THEY WILL RELAY YOUR REPORT TO THE NATIONAL WEATHER SERVICE
DENVER.
LAT...LON 3957 10306 3994 10311 3996 10281 3971 10280
3957 10280
TIME...MOT...LOC 0248Z 248DEG 24KT 3962 10283
$$
COOPERThe office that day
Everything else NWS Denver/Boulder, CO issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Aug 27, 6:18 PM MDT | Severe Thunderstorm Warning | BOU | Morgan | 57 min |
| Aug 27, 6:30 PM MDT | Areal Flood Advisory | BOU | Morgan | 3 hr |
| Aug 27, 6:43 PM MDT | Severe Thunderstorm Warning | BOU | Morgan | 32 min |
| Aug 27, 6:57 PM MDT | Severe Thunderstorm Warning | BOU | Lincoln, Washington | 63 min |
| Aug 27, 7:08 PM MDT | Severe Thunderstorm Warning | BOU | Washington | 52 min |
| Aug 27, 7:24 PM MDT | Severe Thunderstorm Warning | BOU | Sedgwick | 36 min |
| Aug 27, 7:52 PM MDT | Flash Flood Warning | BOU | Sedgwick | 3 hr |
| Aug 27, 8:04 PM MDT | Severe Thunderstorm Warning | BOU | Phillips | 26 min |
| Aug 27, 9:06 PM MDT | Areal Flood Advisory | BOU | Phillips | 2 hr |
| Aug 27, 11:33 PM MDT | Areal Flood Advisory | BOU | Phillips | 117 min |
Nearby
Severe Thunderstorm Warnings in Colorado, 2014Every severe thunderstorm warning in 2014
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.