Alert archive / Colorado / Severe Thunderstorm Warnings in 2014

Severe Thunderstorm Warning 39, NWS Denver/Boulder, CO

May 22, 2014Arapahoe County, Colorado

NWS Denver/Boulder, CO issued this severe thunderstorm warning at May 22, 2014, 4:30 PM MDT for Arapahoe County, Colorado. It was in force for 45 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 22, 2014, 4:30 PM MDT (22:30 UTC)
Expired: May 22, 2014, 5:15 PM MDT
In force: 45 min
Issued by: NWS Denver/Boulder, CO
Area: Storm-based polygon
Hail: 1.0 in
Wind: 60.0 mph

County Arapahoe County, CO

The radar

The Denver radar (KFTG), 12 km from the middle of the area, began a volume at 22:31 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 watch it was issued in

The SPC watch in force over the same counties when this warning went out.

Issued	Product	Office	Lasted
May 22, 12:34 PM MDT	Severe Thunderstorm Watch	SPC	6 hr

The nearest sounding before it

Denver, CO (KDEN), launched 12:00Z, 10.5 hours before the alert went out and 107 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-p

Temperature in red, dew point in green, the mixed-layer parcel dashed.

Hodograph

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: 49 J/kg
Mixed-layer CIN: -195 J/kg
Mixed-layer LCL: 772 m above ground
0-6 km bulk shear: 13 kt
0-1 km storm-relative helicity: -16 m²/s²
0-3 km storm-relative helicity: 75 m²/s²
Significant tornado parameter: 0.0
Supercell composite: -0.0

Open this sounding in Storm Lab

The text

As transmitted, in the capitals the NWS used until 2016.

589 
WUUS55 KBOU 222230
SVRBOU
COC005-222315-
/O.NEW.KBOU.SV.W.0039.140522T2230Z-140522T2315Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE DENVER CO
430 PM MDT THU MAY 22 2014

THE NATIONAL WEATHER SERVICE IN DENVER HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  NORTH CENTRAL ARAPAHOE COUNTY IN NORTHEAST COLORADO...

* UNTIL 515 PM MDT

* AT 429 PM MDT...A SEVERE THUNDERSTORM WAS LOCATED NEAR BENNETT...OR
  27 MILES EAST OF DENVER...AND IS NEARLY STATIONARY.

  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...
  BENNETT AND STRASBURG. 

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.

WIND DAMAGE WITH THIS STORM MAY OCCUR BEFORE ANY RAIN OR LIGHTNING. 
DO NOT WAIT FOR THE SOUND OF THUNDER BEFORE TAKING COVER. SEEK 
SHELTER IMMEDIATELY INSIDE A STURDY STRUCTURE AND STAY AWAY FROM 
WINDOWS.

&&

LAT...LON 3967 10456 3974 10447 3974 10437 3973 10436
      3963 10444
TIME...MOT...LOC 2229Z 119DEG 2KT 3970 10444 

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

$$

BAKER

1 follow-up statement

185 
WWUS55 KBOU 222250
SVSBOU

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE DENVER CO
450 PM MDT THU MAY 22 2014

COC005-222259-
/O.CAN.KBOU.SV.W.0039.000000T0000Z-140522T2315Z/
ARAPAHOE CO-
450 PM MDT THU MAY 22 2014

...THE SEVERE THUNDERSTORM WARNING FOR NORTH CENTRAL ARAPAHOE COUNTY
IS CANCELLED...
        
THE STORM WHICH PROMPTED THE WARNING HAS WEAKENED BELOW SEVERE LIMITS
AND EXITED THE WARNED AREA. THEREFORE THE WARNING HAS BEEN CANCELLED.
HOWEVER HEAVY RAIN IS STILL POSSIBLE WITH THIS THUNDERSTORM.

A SEVERE THUNDERSTORM WATCH REMAINS IN EFFECT UNTIL 700 PM MDT
THURSDAY EVENING FOR NORTHEAST COLORADO.

LAT...LON 3967 10456 3974 10447 3974 10437 3973 10436
      3963 10444
TIME...MOT...LOC 2245Z 119DEG 2KT 3971 10445 

$$

BAKER

The office that day

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

Issued	Product	Office	Counties	Lasted
May 21, 6:15 PM MDT	Tornado Warning Tornado observed	BOU	Washington	30 min
May 22, 12:14 AM MDT	Areal Flood Advisory	BOU	Adams, Weld	91 min
May 22, 12:52 PM MDT	Special Weather Statement	BOU	Larimer	38 min
May 22, 1:50 PM MDT	Special Weather Statement	BOU	Larimer	40 min
May 22, 2:01 PM MDT	Severe Thunderstorm Warning	BOU	Larimer	44 min
May 22, 2:03 PM MDT	Tornado Warning	BOU	Larimer	27 min
May 22, 2:36 PM MDT	Tornado Warning	BOU	Larimer	24 min
May 22, 2:42 PM MDT	Tornado Warning	BOU	Adams, Arapahoe, Denver	33 min
May 22, 2:55 PM MDT	Severe Thunderstorm Warning	BOU	Adams, Arapahoe, Denver	50 min
May 22, 3:56 PM MDT	Severe Thunderstorm Warning	BOU	Arapahoe	49 min
May 22, 4:06 PM MDT	Severe Thunderstorm Warning	BOU	Arapahoe, Elbert	39 min
May 22, 4:43 PM MDT	Areal Flood Advisory	BOU	Denver, Jefferson	3 hr
May 22, 5:07 PM MDT	Flash Flood Warning	BOU	Adams, Arapahoe	3 hr
May 22, 5:18 PM MDT	Areal Flood Advisory	BOU	Adams, Arapahoe, Denver, Jefferson	3 hr

Nearby

Severe Thunderstorm Warnings in Colorado, 2014 Every 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.