Alert archive / Colorado / Severe Thunderstorm Warnings in 2016

Severe Thunderstorm Warning 27, NWS Denver/Boulder, CO

May 24, 2016Adams County, Washington County, Colorado

NWS Denver/Boulder, CO issued this severe thunderstorm warning at May 24, 2016, 5:18 PM MDT for Adams County, Washington County, Colorado. It was in force for 27 min. 1 report came from inside the area while it was in force.

The area

The outline as issued, with what was reported inside it.

The facts

Issued: May 24, 2016, 5:18 PM MDT (23:18 UTC)
Expired: May 24, 2016, 5:45 PM MDT
In force: 27 min
Issued by: NWS Denver/Boulder, CO
Area: Storm-based polygon
Hail: 0.75 in
Wind: 70.0 mph

Counties Adams County, CO, Washington County, CO

The radar

The Denver radar (KFTG), 73 km from the middle of the area, began a volume at 23:20 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.

What was reported inside it

Time	Report	Where	Remark
May 24, 5:48 PM MDT	TORNADO	10 Nw Last Chance, CO

Local storm reports filed while the alert was in force, from inside its polygon or its counties.

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 24, 12:45 PM MDT	Tornado Watch	SPC	7 hr

The nearest sounding before it

Denver, CO (KDEN), launched 12:00Z, 11.3 hours before the alert went out and 39 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: 0 J/kg
Mixed-layer CIN: No buoyant parcel
Mixed-layer LCL: 1378 m above ground
0-6 km bulk shear: 50 kt
0-1 km storm-relative helicity: 89 m²/s²
0-3 km storm-relative helicity: 122 m²/s²
Significant tornado parameter: 0.0
Supercell composite: -0.0

Open this sounding in Storm Lab

The text

As transmitted.

699 
WUUS55 KBOU 242318
SVRBOU
COC001-121-242345-
/O.NEW.KBOU.SV.W.0027.160524T2318Z-160524T2345Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE DENVER CO
518 PM MDT TUE MAY 24 2016

THE NATIONAL WEATHER SERVICE IN DENVER HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  SOUTHWESTERN WASHINGTON COUNTY IN NORTHEASTERN COLORADO...
  SOUTHEASTERN ADAMS COUNTY IN NORTHEASTERN COLORADO...

* UNTIL 545 PM MDT

* AT 516 PM MDT...A SEVERE THUNDERSTORM WAS LOCATED OVER
  SHAMROCK...OR 27 MILES SOUTH OF FORT MORGAN...MOVING EAST AT 20
  MPH.

  HAZARD...70 MPH WIND GUSTS. 

  SOURCE...RADAR INDICATED. DAMAGE TO POWER POLES IN CENTRAL ADAMS
           COUNTY HAS BEEN REPORTED WITH THE OUTFLOW WINDS FROM THIS
           THUNDERSTORM. 

  IMPACT...EXPECT CONSIDERABLE TREE DAMAGE. DAMAGE IS LIKELY TO 
           MOBILE HOMES...ROOFS AND OUTBUILDINGS. 

* LOCATIONS IMPACTED INCLUDE...
  SHAMROCK...WOODROW AND WOODLIN SCHOOL. 

PRECAUTIONARY/PREPAREDNESS ACTIONS...

THIS IS A DANGEROUS SITUATION. THIS STORM MAY PRODUCE WIDESPREAD
WIND DAMAGE ACROSS EASTERN ADAMS AND SOUTHWESTERN WASHINGTON
COUNTIES THROUGH 545 PM MDT. SEEK SHELTER NOW INSIDE A STURDY
STRUCTURE AND STAY AWAY FROM WINDOWS.

&&

A TORNADO WATCH REMAINS IN EFFECT UNTIL 800 PM MDT FOR NORTHEASTERN
COLORADO.

LAT...LON 3975 10349 3976 10400 3992 10396 4000 10364
      4000 10357
TIME...MOT...LOC 2316Z 250DEG 19KT 3987 10383 

HAIL...<.75IN
WIND...70MPH

$$

DANKERS

The office that day

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

Issued	Product	Office	Counties	Lasted
May 24, 1:30 AM MDT	Severe Thunderstorm Warning	BOU	Washington	30 min
May 24, 1:30 PM MDT	Severe Thunderstorm Warning	BOU	Jefferson	30 min
May 24, 1:59 PM MDT	Severe Thunderstorm Warning	BOU	Adams, Broomfield, Jefferson	31 min
May 24, 2:05 PM MDT	Severe Thunderstorm Warning	BOU	Arapahoe, Denver	25 min
May 24, 2:30 PM MDT	Severe Thunderstorm Warning	BOU	Adams, Broomfield, Weld	45 min
May 24, 2:43 PM MDT	Severe Thunderstorm Warning	BOU	Weld	47 min
May 24, 3:58 PM MDT	Severe Thunderstorm Warning	BOU	Adams	32 min
May 24, 4:36 PM MDT	Severe Thunderstorm Warning	BOU	Adams, Morgan	24 min
May 24, 4:58 PM MDT	Severe Thunderstorm Warning	BOU	Adams, Morgan	32 min
May 24, 5:31 PM MDT	Severe Thunderstorm Warning	BOU	Adams, Morgan	29 min
May 24, 5:44 PM MDT	Tornado Warning Tornado observed	BOU	Adams, Morgan	31 min

Nearby

Severe Thunderstorm Warnings in Colorado, 2016 Every severe thunderstorm warning in 2016

Sources

The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.