Alert archive / Colorado / Severe Thunderstorm Warnings in 2018

Severe Thunderstorm Warning 21, NWS Denver/Boulder, CO

May 14, 2018Elbert County, Colorado

NWS Denver/Boulder, CO issued this severe thunderstorm warning at May 14, 2018, 1:58 PM MDT for Elbert County, Colorado. It was in force for 32 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
May 14, 2018, 1:58 PM MDT (19:58 UTC)
Expired
May 14, 2018, 2:30 PM MDT
In force
32 min
Issued by
NWS Denver/Boulder, CO
Area
Storm-based polygon
Hail
1.0 in
Wind
60.0 mph

County Elbert County, CO

The radar

The Denver radar (KFTG), 42 km from the middle of the area, began a volume at 19:58 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, 8.0 hours before the alert went out and 117 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.

Skew-T log-pSkew-T log-p diagram, Denver, CO at 12:00Z on 2018-05-14Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 65 joules per kilogram.LCLLFCEL10008507005003002001001 km2 km3 km6 km9 km12 km-30°-20°-10°0°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Denver, CO at 12:00Z on 2018-05-14The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 17 square meters per square second.1939587897Sfc1 km3 km6 km9 kmRMLM
The wind turning with height, colored by layer: ground to 1 km, 1 to 3 km, 3 to 6 km, 6 to 10 km.
Mixed-layer CAPE
65 J/kg
Mixed-layer CIN
-39 J/kg
Mixed-layer LCL
651 m above ground
0-6 km bulk shear
39 kt
0-1 km storm-relative helicity
17 m²/s²
0-3 km storm-relative helicity
52 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.1

Open this sounding in Storm Lab

The text

As transmitted.

692 
WUUS55 KBOU 141958
SVRBOU
COC039-142030-
/O.NEW.KBOU.SV.W.0021.180514T1958Z-180514T2030Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Denver CO
158 PM MDT MON MAY 14 2018

The National Weather Service in Denver Colorado has issued a

* Severe Thunderstorm Warning for...
  Northwestern Elbert County in east central Colorado...

* Until 230 PM MDT.

* At 157 PM MDT, a severe thunderstorm was located 5 miles northwest
  of Kiowa, or 32 miles southeast of Denver, 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...
  Elizabeth, Kiowa and Ponderosa Park. 

PRECAUTIONARY/PREPAREDNESS ACTIONS...

For your protection move to an interior room on the lowest floor of a
building.

&&

LAT...LON 3933 10464 3957 10454 3956 10422 3928 10427
TIME...MOT...LOC 1957Z 285DEG 16KT 3941 10451 

HAIL...1.00IN
WIND...60MPH
 
$$

SCHLATTER
1 follow-up statement
100 
WWUS55 KBOU 142028
SVSBOU

Severe Weather Statement
National Weather Service Denver CO
228 PM MDT MON MAY 14 2018

COC039-142038-
/O.EXP.KBOU.SV.W.0021.000000T0000Z-180514T2030Z/
Elbert CO-
228 PM MDT MON MAY 14 2018

...THE SEVERE THUNDERSTORM WARNING FOR NORTHWESTERN ELBERT COUNTY
WILL EXPIRE AT 230 PM MDT...
        
The storm which prompted the warning has moved out of the area and 
is now 5 miles northwest of Kiowa.  There is a new severe 
thunderstorm warning for this storm across Central Elbert County. 

LAT...LON 3933 10464 3957 10454 3956 10422 3928 10427
TIME...MOT...LOC 2028Z 285DEG 16KT 3938 10434 

$$

SCHLATTER

The office that day

Everything else NWS Denver/Boulder, CO issued on the same UTC day.

IssuedProductOfficeCountiesLasted
May 13, 7:10 PM MDTSpecial Weather StatementBOUWeld35 min
May 13, 7:16 PM MDTSpecial Weather StatementBOUElbert29 min
May 13, 7:30 PM MDTSevere Thunderstorm WarningBOUAdams, Arapahoe, Elbert30 min
May 13, 7:40 PM MDTSevere Thunderstorm WarningBOUArapahoe, Elbert35 min
May 13, 8:07 PM MDTSevere Thunderstorm WarningBOUArapahoe, Elbert23 min
May 13, 9:07 PM MDTSpecial Weather StatementBOUBroomfield38 min
May 14, 12:03 AM MDTSpecial Weather StatementBOUAdams42 min
May 14, 11:30 AM MDTSpecial Weather StatementBOUJefferson45 min
May 14, 12:09 PM MDTSpecial Weather StatementBOUDenver, Jefferson21 min
May 14, 12:34 PM MDTSpecial Weather StatementBOUDouglas41 min
May 14, 12:43 PM MDTSpecial Weather StatementBOUDenver, Jefferson47 min
May 14, 12:47 PM MDTSevere Thunderstorm WarningBOUDouglas43 min
May 14, 12:54 PM MDTAreal Flood AdvisoryBOUAdams, Arapahoe, Denver, Jefferson38 min
May 14, 1:18 PM MDTSpecial Weather StatementBOUArapahoe42 min
May 14, 1:22 PM MDTSevere Thunderstorm WarningBOUDouglas, Elbert38 min
May 14, 1:45 PM MDTSevere Thunderstorm WarningBOUArapahoe30 min
May 14, 2:06 PM MDTSevere Thunderstorm WarningBOUArapahoe, Elbert39 min
May 14, 2:07 PM MDTSevere Thunderstorm WarningBOUArapahoe, Elbert38 min
May 14, 2:17 PM MDTSevere Thunderstorm WarningBOUElbert28 min
May 14, 2:26 PM MDTSevere Thunderstorm WarningBOUElbert34 min
May 14, 2:41 PM MDTSevere Thunderstorm WarningBOUArapahoe, Elbert, Lincoln49 min
May 14, 3:21 PM MDTSevere Thunderstorm WarningBOULincoln39 min
May 14, 3:50 PM MDTSevere Thunderstorm WarningBOULarimer, Weld40 min

Nearby

Severe Thunderstorm Warnings in Colorado, 2018Every severe thunderstorm warning 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.