Alert archive / Colorado / Red Flag Warnings in 2018

Red Flag Warning 24, NWS Pueblo, CO

April 7, 20185 counties in Colorado

NWS Pueblo, CO issued this red flag warning at Apr 7, 2018, 2:58 PM MDT for 5 counties in Colorado. It took effect at Apr 8, 2018, 1:00 PM MDT. It was in force for 6 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
Apr 7, 2018, 2:58 PM MDT (20:58 UTC)
In effect from
Apr 8, 2018, 1:00 PM MDT
Expired
Apr 8, 2018, 7:00 PM MDT
In force
6 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 20:57 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, 9.0 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 2018-04-07Temperature 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 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 2018-04-07The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 62 square meters per square second.1939587897117Sfc1 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
1280 m above ground
0-6 km bulk shear
71 kt
0-1 km storm-relative helicity
62 m²/s²
0-3 km storm-relative helicity
186 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

Open this sounding in Storm Lab

The text

As transmitted.

630 
WWUS85 KPUB 072058
RFWPUB

URGENT - FIRE WEATHER MESSAGE
National Weather Service Pueblo CO
258 PM MDT Sat Apr 7 2018

...A Red Flag Warning has been issued from 1 PM to 7 PM on Sunday
for gusty winds, low relative humidity, and dry fuels for fire
weather zone 224, which includes the San Luis Valley...

COZ224-081300-
/O.NEW.KPUB.FW.W.0024.180408T1900Z-180409T0100Z/
San Luis Valley Including Alamosa/Del Norte/Fort Garland/Saguache-
258 PM MDT Sat Apr 7 2018

...RED FLAG WARNING IN EFFECT FROM 1 PM TO 7 PM MDT SUNDAY FOR
GUSTY WINDS AND LOW RELATIVE HUMIDITY FOR FIRE WEATHER ZONE 224...

The National Weather Service in Pueblo has issued a Red Flag
Warning for gusty winds, low relative humidity, and dry fuels 
which is in effect from 1 PM to 7 PM MDT Sunday.

* Affected Area...Fire Weather Zone 224.

* Winds...Northwest 20 to 30 mph with gusts up to 45 mph.

* Relative Humidity...As low as 13 percent.

* Impacts...Conditions will be favorable for the rapid ignition, 
  growth and spread of fires. Extreme fire behavior will be 
  possible.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A Red Flag Warning means that critical fire weather conditions
are either occurring now, or will shortly. A combination of
strong winds, low relative humidity, and warm temperatures can
contribute to extreme fire behavior.

&&

$$
3 follow-up statements
673 
WWUS85 KPUB 080937
RFWPUB

URGENT - FIRE WEATHER MESSAGE
National Weather Service Pueblo CO
337 AM MDT Sun Apr 8 2018

...A Red Flag Warning is in effect from 1 PM to 7 PM today for 
gusty winds, low relative humidity, and dry fuels for fire weather
zone 224, which includes the San Luis Valley...

COZ224-090100-
/O.CON.KPUB.FW.W.0024.180408T1900Z-180409T0100Z/
San Luis Valley Including Alamosa/Del Norte/Fort Garland/Saguache-
337 AM MDT Sun Apr 8 2018

...RED FLAG WARNING REMAINS IN EFFECT FROM 1 PM THIS AFTERNOON TO
7 PM MDT THIS EVENING FOR GUSTY WINDS AND LOW RELATIVE HUMIDITY
FOR FIRE WEATHER ZONE 224...

* Affected Area...Fire Weather Zone 224.

* Winds...Northwest 20 to 25 mph with gusts up to 35 mph.

* Relative Humidity...As low as 13 percent.

* Impacts...Conditions will be favorable for the rapid ignition, 
  growth and spread of fires. Extreme fire behavior will be 
  possible.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A Red Flag Warning means that critical fire weather conditions
are either occurring now, or will shortly. A combination of
strong winds, low relative humidity, and dry fuels will result in
the potential for extreme fire behavior.

&&

$$
464 
WWUS85 KPUB 082048
RFWPUB

URGENT - FIRE WEATHER MESSAGE
National Weather Service Pueblo CO
248 PM MDT Sun Apr 8 2018

...A Red Flag Warning is in effect until 7 PM today for gusty 
winds, low relative humidity, and dry fuels for fire weather zone 
224, which includes the San Luis Valley...

COZ224-090100-
/O.CON.KPUB.FW.W.0024.000000T0000Z-180409T0100Z/
San Luis Valley Including Alamosa/Del Norte/Fort Garland/Saguache-
248 PM MDT Sun Apr 8 2018

...RED FLAG WARNING REMAINS IN EFFECT UNTIL 7 PM MDT THIS EVENING
FOR GUSTY WINDS AND LOW RELATIVE HUMIDITY FOR FIRE WEATHER ZONE
224...

* Affected Area...Fire Weather Zone 224.

* Winds...West 20 to 30 mph with gusts up to 40 mph.

* Relative Humidity...As low as 14 percent.

* Impacts...Conditions will be favorable for the rapid ignition, 
  growth and spread of fires. Extreme fire behavior will be 
  possible.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A Red Flag Warning means that critical fire weather conditions
are either occurring now, or will shortly. A combination of
strong winds, low relative humidity, and dry fuels will result in
the potential for extreme fire behavior.

&&

$$
242 
WWUS85 KPUB 090056
RFWPUB

URGENT - FIRE WEATHER MESSAGE
National Weather Service Pueblo CO
656 PM MDT Sun Apr 8 2018

COZ224-090200-
/O.EXP.KPUB.FW.W.0024.000000T0000Z-180409T0100Z/
San Luis Valley Including Alamosa/Del Norte/Fort Garland/Saguache-
656 PM MDT Sun Apr 8 2018

...RED FLAG WARNING WILL EXPIRE AT 7 PM MDT THIS EVENING FOR
GUSTY WINDS AND LOW RELATIVE HUMIDITY FOR FIRE WEATHER ZONE 224...

Winds have subsided over the San Luis Valley this evening and
humidity values have begun to recover, therefore, the Red Flag
Warning will be allowed to expire at 7 pm.

$$

The office that day

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

IssuedProductOfficeCountiesLasted
Apr 7, 4:07 AM MDTWinter Storm WarningPUBChaffee, Lake, Saguache29 hr

Nearby

Red Flag Warnings in Colorado, 2018Every red flag 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.