Alert archive / Colorado / Freeze Warnings in 2012

Freeze Warning 2, NWS Pueblo, CO

May 28, 20125 counties in Colorado

NWS Pueblo, CO issued this freeze warning at May 28, 2012, 3:09 PM MDT for 5 counties in Colorado. It took effect at May 29, 2012, 1:00 AM MDT. It was in force for 3 hr. No storm report in the archive falls inside the area while it was in force.

The area

The counties it named.

The facts

Issued
May 28, 2012, 3:09 PM MDT (21:09 UTC)
In effect from
May 29, 2012, 1:00 AM MDT
Expired
May 29, 2012, 3:42 AM MDT
In force
3 hr
Issued by
NWS Pueblo, CO

Counties Alamosa County, CO, Conejos County, CO, Costilla County, CO, Rio Grande County, CO, Saguache County, CO

The radar

The Pueblo radar (KPUX), 190 km from the middle of the area, began a volume at 21:10 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

Grand Junction, CO (KGJT), launched 12:00Z, 9.2 hours before the alert went out and 279 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, Grand Junction, CO at 12:00Z on 2012-05-28Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 0 joules per kilogram.LCL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Grand Junction, CO at 12:00Z on 2012-05-28The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity -27 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
0 J/kg
Mixed-layer CIN
No buoyant parcel
Mixed-layer LCL
2282 m above ground
0-6 km bulk shear
61 kt
0-1 km storm-relative helicity
-27 m²/s²
0-3 km storm-relative helicity
87 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.

350 
WWUS75 KPUB 282109
NPWPUB

URGENT - WEATHER MESSAGE
NATIONAL WEATHER SERVICE PUEBLO CO
309 PM MDT MON MAY 28 2012

COZ069>071-290400-
/O.UPG.KPUB.FZ.A.0001.120529T0700Z-120529T1300Z/
/O.NEW.KPUB.FZ.W.0002.120529T0700Z-120529T1400Z/
DEL NORTE VICINITY/NORTHERN SAN LUIS VALLEY BELOW 8500 FT-
ALAMOSA VICINITY/CENTRAL SAN LUIS VALLEY BELOW 8500 FT-
SOUTHERN SAN LUIS VALLEY-
INCLUDING...CENTER...DEL NORTE...ALAMOSA...MONTE VISTA...
MANASSA...LA JARA...ANTONITO...SANFORD...SAN LUIS...
FORT GARLAND...BLANCA
309 PM MDT MON MAY 28 2012

...FREEZE WARNING IN EFFECT FROM 1 AM TO 8 AM MDT TUESDAY...

THE NATIONAL WEATHER SERVICE IN PUEBLO HAS ISSUED A FREEZE
WARNING...WHICH IS IN EFFECT FROM 1 AM TO 8 AM MDT TUESDAY. THE
FREEZE WATCH IS NO LONGER IN EFFECT. 

* LOCATION...THE SAN LUIS VALLEY.

* TEMPERATURES...ANOTHER HARD FREEZE IS EXPECTED TONIGHT THROUGH
  EARLY TUESDAY MORNING...WITH MINIMUM TEMPERATURES IN THE UPPER
  20S LIKELY IN THE CENTER OF THE VALLEY.

* IMPACT...PROLONGED FREEZING TEMPERATURES MAY DAMAGE TENDER 
  VEGETATION. SENSITIVE PLANTS SHOULD BE COVERED OR BROUGHT 
  INDOORS AGAIN TONIGHT. 

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A PROLONGED PERIOD OF SUBFREEZING TEMPERATURES IS EXPECTED.

TAKE PRECAUTIONS TO PROTECT CROPS OR VEGETATION.  DRAIN EXPOSED
WATER PIPES AND IRRIGATION SYSTEMS.

&&

$$
2 follow-up statements
775 
WWUS75 KPUB 290345
NPWPUB

URGENT - WEATHER MESSAGE
NATIONAL WEATHER SERVICE PUEBLO CO
945 PM MDT MON MAY 28 2012

COZ069>071-291000-
/O.CON.KPUB.FZ.W.0002.120529T0700Z-120529T1400Z/
DEL NORTE VICINITY/NORTHERN SAN LUIS VALLEY BELOW 8500 FT-
ALAMOSA VICINITY/CENTRAL SAN LUIS VALLEY BELOW 8500 FT-
SOUTHERN SAN LUIS VALLEY-
INCLUDING...CENTER...DEL NORTE...ALAMOSA...MONTE VISTA...
MANASSA...LA JARA...ANTONITO...SANFORD...SAN LUIS...
FORT GARLAND...BLANCA
945 PM MDT MON MAY 28 2012

...FREEZE WARNING REMAINS IN EFFECT FROM 1 AM TO 8 AM MDT
TUESDAY...

A FREEZE WARNING REMAINS IN EFFECT FROM 1 AM TO 8 AM MDT TUESDAY.

* LOCATION...THE SAN LUIS VALLEY.

* TEMPERATURES...ANOTHER HARD FREEZE IS EXPECTED ACROSS THE SAN
  LUIS VALLEY...WITH LOW TEMPERATURES DROPPING INTO THE UPPER 20S
  TO LOWER 30S OVERNIGHT. THE COLDEST READINGS ARE EXPECTED OVER
  CENTRAL PORTIONS OF THE VALLEY.

* IMPACT...PROLONGED FREEZING TEMPERATURES MAY DAMAGE TENDER 
  VEGETATION. SENSITIVE PLANTS SHOULD BE COVERED OR BROUGHT 
  INDOORS AGAIN TONIGHT. 

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A PROLONGED PERIOD OF SUBFREEZING TEMPERATURES IS EXPECTED.

TAKE PRECAUTIONS TO PROTECT CROPS OR VEGETATION.  DRAIN EXPOSED
WATER PIPES AND IRRIGATION SYSTEMS.

&&

$$
403 
WWUS75 KPUB 290942
NPWPUB

URGENT - WEATHER MESSAGE
NATIONAL WEATHER SERVICE PUEBLO CO
342 AM MDT TUE MAY 29 2012

COZ069>071-291045-
/O.CAN.KPUB.FZ.W.0002.000000T0000Z-120529T1400Z/
DEL NORTE VICINITY/NORTHERN SAN LUIS VALLEY BELOW 8500 FT-
ALAMOSA VICINITY/CENTRAL SAN LUIS VALLEY BELOW 8500 FT-
SOUTHERN SAN LUIS VALLEY-
342 AM MDT TUE MAY 29 2012

...FREEZE WARNING IS CANCELLED...

THE NATIONAL WEATHER SERVICE IN PUEBLO HAS CANCELLED THE FREEZE
WARNING. 

TEMPERATURES HAVE REMAINED IN THE MID TO UPPER 30S ACROSS THE SAN
LUIS VALLEY. ISOLATED LOCATIONS MAY BRIEFLY FALL BELOW FREEZING
THROUGH DAWN...BUT EXPECT MOST OF THE VALLEY TO REMAIN ABOVE THE
FREEZING MARK THROUGH SUNRISE.

$$

Nearby

Freeze Warnings in Colorado, 2012Every freeze warning in 2012

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.