Alert archive / Iowa / Red Flag Warnings in 2020

Red Flag Warning 3, NWS Des Moines, IA

October 14, 202014 counties in Iowa

NWS Des Moines, IA issued this red flag warning at Oct 14, 2020, 3:43 AM CDT for 14 counties in Iowa. It took effect at Oct 14, 2020, 1:00 PM CDT. It was in force for 7 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
Oct 14, 2020, 3:43 AM CDT (08:43 UTC)
In effect from
Oct 14, 2020, 1:00 PM CDT
Expired
Oct 14, 2020, 8:00 PM CDT
In force
7 hr
Issued by
NWS Des Moines, IA

Counties Audubon County, IA, Calhoun County, IA, Carroll County, IA, Cass County, IA, Crawford County, IA, Emmet County, IA, Greene County, IA, Guthrie County, IA, Humboldt County, IA, Kossuth County, IA, Palo Alto County, IA, Pocahontas County, IA, Sac County, IA, Webster County, IA

The radar

The Des Moines radar (KDMX), 106 km from the middle of the area, began a volume at 08:50 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

Omaha, NE (KOAX), launched 00:00Z, 8.7 hours before the alert went out and 183 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, Omaha, NE at 00:00Z on 2020-10-14Temperature 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, Omaha, NE at 00:00Z on 2020-10-14The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 21 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
2517 m above ground
0-6 km bulk shear
68 kt
0-1 km storm-relative helicity
21 m²/s²
0-3 km storm-relative helicity
114 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

Open this sounding in Storm Lab

The text

As transmitted.

862 
WWUS83 KDMX 140843
RFWDMX

URGENT - FIRE WEATHER MESSAGE
National Weather Service Des Moines IA
Issued by National Weather Service Quad Cities IA IL
343 AM CDT Wed Oct 14 2020

...Critical Fire Danger Today...

.Strong winds and low relative humidity this afternoon will 
result in rapid spread of any fires that start, and the potential
for uncontrollable fires.

IAZ004-005-015-023-024-033>035-044-045-141645-
/O.UPG.KDMX.FW.A.0003.201014T1800Z-201015T0000Z/
/O.NEW.KDMX.FW.W.0003.201014T1800Z-201015T0100Z/
Emmet-Kossuth-Palo Alto-Pocahontas-Humboldt-Sac-Calhoun-Webster-
Crawford-Carroll-
343 AM CDT Wed Oct 14 2020

...RED FLAG WARNING IN EFFECT FROM 1 PM THIS AFTERNOON TO 8 PM
CDT THIS EVENING FOR CRITICAL FIRE DANGER...

The National Weather Service in the Des Moines has issued a Red
Flag Warning for strong winds and dry conditions...which is in 
effect from 1 PM this afternoon to 8 PM CDT this evening. The Fire
Weather Watch is no longer in effect.

* TIMING...This afternoon and early evening.

* WIND...From the northwest at 20 to 30 mph, gusting to 45 mph.

* Relative Humidity...as low as 25 percent.

* FUEL...grasslands and crops across the area are mostly cured 
  and able to burn easily.

* Impacts...Any fires that start this afternoon may spread 
  rapidly and become uncontrollable.

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.

&&

$$

IAZ046-057-058-070-141645-
/O.NEW.KDMX.FW.W.0003.201014T1800Z-201015T0100Z/
Greene-Audubon-Guthrie-Cass-
343 AM CDT Wed Oct 14 2020

...RED FLAG WARNING IN EFFECT FROM 1 PM THIS AFTERNOON TO 8 PM
CDT THIS EVENING FOR CRITICAL FIRE DANGER...

The National Weather Service in the Des Moines has issued a Red
Flag Warning for strong winds and dry conditions...which is in 
effect from 1 PM this afternoon to 8 PM CDT this evening. The Fire
Weather Watch is no longer in effect.

* TIMING...This afternoon and early evening.

* WIND...From the northwest at 20 to 30 mph, gusting to 45 mph.

* Relative Humidity...as low as 25 percent.

* FUEL...grasslands and crops across the area are mostly cured 
  and able to burn easily.

* Impacts...Any fires that start this afternoon may spread 
  rapidly and become uncontrollable.

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.

&&

$$

RP Kinney
4 follow-up statements
225 
WWUS83 KDMX 141612
RFWDMX

URGENT - FIRE WEATHER MESSAGE
National Weather Service Des Moines IA
Issued by National Weather Service Quad Cities IA IL
1112 AM CDT Wed Oct 14 2020

...CRITICAL FIRE DANGER TODAY...

.Strong winds and low relative humidity this afternoon will
result in rapid spread of any fires that start, and the potential
for uncontrollable fires.

IAZ004-005-015-023-024-033>035-044>046-057-058-070-150015-
/O.CON.KDMX.FW.W.0003.201014T1800Z-201015T0100Z/
Emmet-Kossuth-Palo Alto-Pocahontas-Humboldt-Sac-Calhoun-Webster-
Crawford-Carroll-Greene-Audubon-Guthrie-Cass-
1112 AM CDT Wed Oct 14 2020

...RED FLAG WARNING IN EFFECT FROM 1PM THIS AFTERNOON TO 8 PM CDT
THIS EVENING FOR EXTREME FIRE CONDITIONS....

* TIMING...This afternoon and early evening.

* WIND...From the west at 20 to 30 mph, gusting to 45 mph. Winds
  changing to the northwest after 5 pm.

* Relative Humidity...as low as 25 percent.

* FUEL...grasslands and crops across the area are mostly cured 
  and able to burn easily.

* Impacts...Any fires that start this afternoon may spread 
  rapidly and become uncontrollable.

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.

&&

$$

DLS
440 
WWUS83 KDMX 142043
RFWDMX

URGENT - FIRE WEATHER MESSAGE
National Weather Service Des Moines IA
Issued by National Weather Service Quad Cities IA IL
343 PM CDT Wed Oct 14 2020

...CRITICAL FIRE DANGER TODAY...

.Strong winds and low relative humidity this afternoon and early
evening will result in rapid spread of any fires that start, and 
the potential for uncontrollable fires.

IAZ004-005-015-023-024-033>035-044>046-057-058-070-150100-
/O.CON.KDMX.FW.W.0003.000000T0000Z-201015T0100Z/
Emmet-Kossuth-Palo Alto-Pocahontas-Humboldt-Sac-Calhoun-Webster-
Crawford-Carroll-Greene-Audubon-Guthrie-Cass-
343 PM CDT Wed Oct 14 2020

...RED FLAG WARNING REMAINS IN EFFECT UNTIL 8 PM CDT THIS EVENING
FOR EXTREME FIRE CONDITIONS...

* TIMING...This afternoon and early evening.

* WIND...From the west at 20 to 30 mph, gusting to 45 mph. Winds 
  changing to the northwest after 5 pm.

* Relative Humidity...as low as 25 percent.

* FUEL...grasslands and crops across the area are mostly cured 
  and able to burn easily.

* Impacts...Any fires that start this afternoon may spread 
  rapidly and become uncontrollable.

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.

&&

$$

DLS
739 
WWUS83 KDMX 150011
RFWDMX

URGENT - FIRE WEATHER MESSAGE
National Weather Service Des Moines IA
Issued by National Weather Service Quad Cities IA IL
711 PM CDT Wed Oct 14 2020

...CRITICAL FIRE DANGER TODAY...

.Strong winds and low relative humidity this afternoon and early
evening will result in rapid spread of any fires that start, and
the potential for uncontrollable fires.

IAZ004-005-015-023-024-033>035-044>046-057-058-070-150115-
/O.CON.KDMX.FW.W.0003.000000T0000Z-201015T0100Z/
Emmet-Kossuth-Palo Alto-Pocahontas-Humboldt-Sac-Calhoun-Webster-
Crawford-Carroll-Greene-Audubon-Guthrie-Cass-
711 PM CDT Wed Oct 14 2020

...RED FLAG WARNING REMAINS IN EFFECT UNTIL 8 PM CDT THIS EVENING
FOR EXTREME FIRE CONDITIONS|...

* TIMING...This afternoon and early evening.

* WIND...From the west at 20 to 30 mph, gusting to 45 mph. Winds 
  changing to the northwest after 5 pm.

* Relative Humidity...as low as 24 percent.

* FUEL...grasslands and crops across the area are mostly cured 
  and able to burn easily.

* Impacts...Any fires that start this afternoon may spread 
  rapidly and become uncontrollable.

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.

&&

$$

DC
294 
WWUS83 KDMX 150059
RFWDMX

URGENT - FIRE WEATHER MESSAGE
National Weather Service Des Moines IA
Issued by National Weather Service Quad Cities IA IL
759 PM CDT Wed Oct 14 2020

IAZ004-005-015-023-024-033>035-044>046-057-058-070-150200-
/O.EXP.KDMX.FW.W.0003.000000T0000Z-201015T0100Z/
Emmet-Kossuth-Palo Alto-Pocahontas-Humboldt-Sac-Calhoun-Webster-
Crawford-Carroll-Greene-Audubon-Guthrie-Cass-
759 PM CDT Wed Oct 14 2020

...RED FLAG WARNING WILL EXPIRE AT 8 PM CDT THIS EVENING FOR
EXTREME FIRE CONDITIONS...

Relative humidities are increasing this evening with the loss of
daytime heating. Therefore, the Red Flag Warning will be allowed
to expire. Winds will remain breezy this evening especially in
north central Iowa where gusts up to 45 MPH are possible. 

$$

DC

What forecasters said that day

The local office's own words before this red flag warning went out, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.

NWS Des Moines, IA wrote its last area forecast discussion before this red flag warning went out at Oct 14, 3:33 AM CDT, 10 minutes earlier.

Area forecast discussion, Oct 14, 3:33 AM CDT, 10 minutes before
AREA FORECAST DISCUSSION
National Weather Service Des Moines IA
Issued by National Weather Service Quad Cities IA IL
333 AM CDT Wed Oct 14 2020

.DISCUSSION..(Today through Tuesday)
ISSUED AT 304 AM CDT Wed Oct14 2020

Key Messages:

1) Critical fire weather conditions today
2) Turning cooler for the rest of the week
3) Widespread frost/freeze expected across much of the area
Thursday night

Fire weather:
Numerous forecast issues on the table for the next week. First and
foremost, critical fire weather conditions are expected today west
of Interstate 35. Grasslands and crops in this area are mostly
cured, and coupled with a strong northwest wind gusting to 45 mph
and afternoon RH values around 25 percent, will result in rapid
fire spread Have issued a Red Flag Warning for this afternoon and
early evening, along and west of a line from Algona, to Fort Dodge
and Atlantic, where the most extreme conditions exist. Elsewhere
across the forecast area, conditions will not be as critical due
to lesser curing of grasslands, but cured crops will still be
very susceptible to rapid fire spread.

Temperatures:
Looking ahead, colder air will overspread the region tonight into
Thursday, and persist for much of the period. The exception will
be a brief temp rebound on Saturday. Widespread frost is expected
Thursday night, with low in the upper 20s to low 30s. Sunday and
Monday look to be the coldest days of the periods, with highs
mainly in the 40s and lows in the 20s to low 30s.

Precipitation:
Cannot completely discount a few sprinkles or a stray shower this
afternoon/tonight with the fropa, but will leave to later shifts
to re-assess for potential low pops. For Friday night/Saturday, a
weak wave will skirt northern Iowa, with potential for some light
rain and perhaps some snowflakes mixed in. Will also carry low
chance pops from Saturday night through Monday, although there is
still considerable model uncertainty in this period.

&&

.AVIATION...(For the 06Z TAFS through 06Z Wednesday Night)
ISSUED AT 1218 AM CDT Wed Oct 14 2020

The main focus of the 06z TAF issuance continues to be gusty winds
and LLWS. Southerly winds will increase after 11z at the surface
and aloft ahead of a cold front pushing through the Plains. Have
target a window from 11Z-16Z for LLWS. Winds will veer to westerly
and eventually northwest through the afternoon with gusts of 25-30
kts.

&&

.DMX WATCHES/WARNINGS/ADVISORIES...
Red Flag Warning from 1 PM this afternoon to 8 PM CDT this
evening for Audubon-Calhoun-Carroll-Cass-Crawford-Emmet-Greene-
Guthrie-Humboldt-Kossuth-Palo Alto-Pocahontas-Sac-Webster.

&&

DISCUSSION...RP Kinney
AVIATION...RP Kinney
Hazardous weather outlook, Oct 13, 6:47 PM CDT, 8 hours 56 minutes before
Hazardous Weather Outlook
National Weather Service Des Moines IA
Issued by National Weather Service Quad Cities IA IL
647 PM CDT Tue Oct 13 2020

IAZ004>007-015>017-023>028-033>039-044>050-057>062-070>075-
081>086-092>097-150000-
Emmet-Kossuth-Winnebago-Worth-Palo Alto-Hancock-Cerro Gordo-
Pocahontas-Humboldt-Wright-Franklin-Butler-Bremer-Sac-Calhoun-
Webster-Hamilton-Hardin-Grundy-Black Hawk-Crawford-Carroll-Greene-
Boone-Story-Marshall-Tama-Audubon-Guthrie-Dallas-Polk-Jasper-
Poweshiek-Cass-Adair-Madison-Warren-Marion-Mahaska-Adams-Union-
Clarke-Lucas-Monroe-Wapello-Taylor-Ringgold-Decatur-Wayne-
Appanoose-Davis-
647 PM CDT Tue Oct 13 2020

This Hazardous Weather Outlook is for portions of central Iowa.

.DAY ONE...Tonight

No hazardous weather is expected at this time.

.DAYS TWO THROUGH SEVEN...Wednesday through Monday

An elevated fire risk will be seen Wednesday afternoon,
especially west of Interstate 35, where the combination of gusty
winds of 30 to 40 mph and relative humidity levels of 20 to 30
percent will lead to high fire danger.

Frost and near freezing temperatures may threaten susceptible
vegetation over southern and east central Iowa Thursday night.

.SPOTTER INFORMATION STATEMENT...

Spotter activation will not be needed today and tonight.

The office that day

Everything else NWS Des Moines, IA issued on the same UTC day.

IssuedProductOfficeCountiesLasted
Oct 14, 1:39 PM CDTWind AdvisoryDMXBremer, Butler, Cerro Gordo, Emmet, Franklin, Hancock and 5 more10 hr

Nearby

Red Flag Warnings in Iowa, 2020Every red flag warning in 2020

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.