Alert archive / Colorado / Severe Thunderstorm Warnings in 2011

Severe Thunderstorm Warning 102, NWS Pueblo, CO

July 21, 2011Bent County, Kiowa County, Prowers County, Colorado

NWS Pueblo, CO issued this severe thunderstorm warning at Jul 21, 2011, 5:58 PM MDT for Bent County, Kiowa County, Prowers County, Colorado. It was in force for 26 min. 3 reports 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: Jul 21, 2011, 5:58 PM MDT (23:58 UTC)
Expired: Jul 21, 2011, 6:24 PM MDT
In force: 26 min
Issued by: NWS Pueblo, CO
Area: Storm-based polygon
Hail: 0.75 in
Wind: 60.0 mph

Counties Bent County, CO, Kiowa County, CO, Prowers County, CO

The radar

The Goodland radar (KGLD), 149 km from the middle of the area, began a volume at 00:02 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
Jul 21, 5:58 PM MDT	TSTM WND GST 64	Lamar, CO
Jul 21, 5:59 PM MDT	TSTM WND GST 61	Lamar, CO
Jul 21, 6:06 PM MDT	TSTM WND DMG	Lamar, CO	DOWNED TELEPHONE LINES IN CENTRAL LAMAR.

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

The nearest sounding before it

Denver, CO (KDNR), launched 12:00Z, 12.0 hours before the alert went out and 201 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: 269 J/kg
Mixed-layer CIN: -186 J/kg
Mixed-layer LCL: 1725 m above ground
0-6 km bulk shear: 40 kt
0-1 km storm-relative helicity: 12 m²/s²
0-3 km storm-relative helicity: 4 m²/s²
Significant tornado parameter: 0.0
Supercell composite: -0.2

Open this sounding in Storm Lab

The text

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

625 
WUUS55 KPUB 212358
SVRPUB
COC011-061-099-220045-
/O.NEW.KPUB.SV.W.0102.110721T2358Z-110722T0045Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE PUEBLO CO
558 PM MDT THU JUL 21 2011

THE NATIONAL WEATHER SERVICE IN PUEBLO HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  NORTHEASTERN BENT COUNTY IN SOUTHEAST COLORADO...
  EASTERN KIOWA COUNTY IN SOUTHEAST COLORADO...
  NORTHWESTERN PROWERS COUNTY IN SOUTHEAST COLORADO...

* UNTIL 645 PM MDT

* AT 555 PM MDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  SEVERE THUNDERSTORM CAPABLE OF PRODUCING DAMAGING WINDS IN EXCESS
  OF 60 MPH.  THIS STORM WAS LOCATED 8 MILES SOUTHWEST OF LAMAR...AND
  MOVING NORTH AT 25 MPH. PENNY SIZE HAIL MAY ALSO ACCOMPANY THESE
  DAMAGING WINDS.

* LOCATIONS IMPACTED INCLUDE...
  LAMAR...GRANADA...MCCLAVE...BRISTOL...WILEY...QUEENS RESERVOIR...
  NEEGRONDA RESERVOIR...NEENOSHE RESERVOIR...SWEETWATER RESERVOIR...
  CHIVINGTON...BRANDON...SHERIDAN LAKE AND CADDOA.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

SEVERE THUNDERSTORMS PRODUCE DAMAGING WIND IN EXCESS OF 60 MILES PER
HOUR...DESTRUCTIVE HAIL...DEADLY LIGHTNING...AND VERY HEAVY RAIN. FOR
YOUR PROTECTION MOVE TO AN INTERIOR ROOM ON THE LOWEST FLOOR OF YOUR
HOME OR BUSINESS. HEAVY RAINS FLOOD ROADS QUICKLY SO DO NOT DRIVE
INTO AREAS WHERE WATER COVERS THE ROAD.

&&

LAT...LON 3782 10252 3802 10302 3857 10264 3842 10204
      3833 10203
TIME...MOT...LOC 2358Z 185DEG 20KT 3802 10272
WIND...HAIL 60MPH 0.75IN

$$
SR

1 follow-up statement

730 
WWUS55 KPUB 220024
SVSPUB

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE PUEBLO CO
624 PM MDT THU JUL 21 2011

COC011-061-099-220034-
/O.CAN.KPUB.SV.W.0102.000000T0000Z-110722T0045Z/
PROWERS CO-BENT CO-KIOWA CO-
624 PM MDT THU JUL 21 2011

...THE SEVERE THUNDERSTORM WARNING FOR EASTERN KIOWA...NORTHEASTERN
BENT AND NORTHWESTERN PROWERS COUNTIES IS CANCELLED...

THE STORM WHICH PROMPTED THE WARNING HAS WEAKENED BELOW SEVERE
LIMITS...AND NO LONGER POSES AN IMMEDIATE THREAT TO LIFE OR
PROPERTY...HOWEVER GUSTY WINDS ARE STILL POSSIBLE WITH THIS
THUNDERSTORM.

LAT...LON 3782 10252 3802 10302 3857 10264 3842 10204
      3833 10203
TIME...MOT...LOC 0024Z 185DEG 20KT 3816 10270

$$
SR

The office that day

Everything else NWS Pueblo, CO issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
Jul 21, 3:49 PM MDT	Severe Thunderstorm Warning	PUB	Bent, Las Animas, Otero	26 min
Jul 21, 4:27 PM MDT	Areal Flood Advisory	PUB	Las Animas, Otero	81 min
Jul 21, 5:06 PM MDT	Areal Flood Advisory	PUB	Bent, Otero	79 min
Jul 21, 5:16 PM MDT	Severe Thunderstorm Warning	PUB	Bent, Kiowa, Otero, Prowers	59 min

Nearby

Severe Thunderstorm Warnings in Colorado, 2011 Every severe thunderstorm warning in 2011

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.