Alert archive / Arizona / Flash Flood Warnings in 2018

Flash Flood Warning 46, NWS Tucson, AZ

October 23, 2018Cochise County, Arizona

NWS Tucson, AZ issued this flash flood warning at Oct 23, 2018, 6:37 AM MST for Cochise County, Arizona. 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 outline as issued.

The facts

Issued: Oct 23, 2018, 6:37 AM MST (13:37 UTC)
Expired: Oct 23, 2018, 9:30 AM MST
In force: 3 hr
Issued by: NWS Tucson, AZ
Area: Storm-based polygon
Flood severity: None

County Cochise County, AZ

The radar

The Tucson radar (KEMX), 78 km from the middle of the area, began a volume at 13:36 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

Tuscon, AZ (KDMA), launched 12:00Z, 1.6 hours before the alert went out and 118 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: 801 J/kg
Mixed-layer CIN: -116 J/kg
Mixed-layer LCL: 1445 m above ground
0-6 km bulk shear: 32 kt
0-1 km storm-relative helicity: 71 m²/s²
0-3 km storm-relative helicity: 139 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 2.2

Open this sounding in Storm Lab

The text

As transmitted.

030 
WGUS55 KTWC 231337
FFWTWC
AZC003-231630-
/O.NEW.KTWC.FF.W.0046.181023T1337Z-181023T1630Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
Flash Flood Warning
National Weather Service Tucson AZ
637 AM MST TUE OCT 23 2018

The National Weather Service in Tucson has issued a

* Flash Flood Warning for...
  South central Cochise County in southeastern Arizona...

* Until 930 AM MST.

* At 635 AM MST, Doppler radar and automated rain gauges indicated
  thunderstorms producing heavy rain across the warned area. Up to 
  two inches of rain have already fallen and Flash flooding is 
  expected to begin shortly.

* Some locations that will experience flooding include...
  Locations off the south and westerns slopes of the Mule Mountains 
  west of Bisbee, near Palominas, Naco and Junction Of Highways 80 
  And 90.

Additional rainfall amounts of one to 1.5 inches are possible in the 
warned area.

This includes the following highways...
 Route 80 between mile markers 331 and 342.
 Route 90 between mile markers 331 and 336.
 Route 92 between mile markers 340 and 353.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Turn around, don't drown when encountering flooded roads. Most flood
deaths occur in vehicles.

Excessive runoff from heavy rainfall will cause flooding of washes
and streams, country roads, farmland, and other low lying spots.

Please report flooding to your local law enforcement agency when you
can do so safely.

&&

LAT...LON 3155 10984 3134 10994 3134 11013 3155 11011

$$

Cerniglia

2 follow-up statements

394 
WGUS75 KTWC 231455
FFSTWC

Flash Flood Statement
National Weather Service Tucson AZ
755 AM MST TUE OCT 23 2018

AZC003-231630-
/O.CON.KTWC.FF.W.0046.000000T0000Z-181023T1630Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Cochise-
755 AM MST TUE OCT 23 2018

...THE FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 930 AM MST FOR
SOUTH CENTRAL COCHISE COUNTY...

At 754 AM MST, Doppler radar and automated rain gauges indicated 
thunderstorms producing heavy rain over the warned area. Automated 
gauges in the Hereford area indicate that up to two inches of rain 
have already fallen. Flash flooding is expected to begin shortly.

Some locations that will experience flooding include...
Bisbee, Sierra Vista Southeast, Palominas, Naco and Junction Of
Highways 80 And 90.

Additional rainfall amounts of up to 1 inch are possible in the 
warned area.

This includes the following highways...
 Route 80 between mile markers 331 and 342.
 Route 90 between mile markers 331 and 336.
 Route 92 between mile markers 340 and 353.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Turn around, don't drown when encountering flooded roads. Most flood
deaths occur in vehicles.

Excessive runoff from heavy rainfall will cause flooding of washes
and streams, country roads, farmland, and other low lying spots.

Please report flooding to your local law enforcement agency when you
can do so safely.

&&

LAT...LON 3155 10984 3134 10994 3134 11013 3155 11011

$$

GL

920 
WGUS75 KTWC 231626
FFSTWC

Flash Flood Statement
National Weather Service Tucson AZ
926 AM MST TUE OCT 23 2018

AZC003-231636-
/O.EXP.KTWC.FF.W.0046.000000T0000Z-181023T1630Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Cochise-
926 AM MST TUE OCT 23 2018

...THE FLASH FLOOD WARNING FOR SOUTH CENTRAL COCHISE COUNTY WILL
EXPIRE AT 930 AM MST...

Flood waters have receded, though area washes continue to flow due 
to ongoing rain. Please continue to heed any remaining road closures.

LAT...LON 3155 10984 3134 10994 3134 11013 3155 11011

$$

GL

The office that day

Everything else NWS Tucson, AZ issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
Oct 23, 6:07 AM MST	Areal Flood Advisory	TWC	Cochise	3 hr
Oct 23, 9:20 AM MST	Special Weather Statement	TWC		25 min
Oct 23, 9:56 AM MST	Special Weather Statement	TWC		64 min
Oct 23, 10:00 AM MST	Areal Flood Advisory	TWC	Cochise, Graham, Greenlee	3 hr
Oct 23, 10:15 AM MST	Special Weather Statement	TWC	Santa Cruz	60 min
Oct 23, 10:39 AM MST	Areal Flood Advisory	TWC	Santa Cruz	3 hr
Oct 23, 10:44 AM MST	Severe Thunderstorm Warning	TWC	Santa Cruz	46 min
Oct 23, 11:20 AM MST	Severe Thunderstorm Warning	TWC	Pima, Santa Cruz	40 min
Oct 23, 11:48 AM MST	Areal Flood Advisory	TWC	Cochise, Santa Cruz	3 hr
Oct 23, 11:56 AM MST	Severe Thunderstorm Warning	TWC	Pima	64 min
Oct 23, 12:07 PM MST	Flash Flood Warning	TWC	Pima, Santa Cruz	3 hr
Oct 23, 12:21 PM MST	Areal Flood Advisory	TWC	Pima, Santa Cruz	3 hr
Oct 23, 12:55 PM MST	Severe Thunderstorm Warning	TWC	Pima	65 min
Oct 23, 1:08 PM MST	Flash Flood Warning	TWC	Pima	3 hr
Oct 23, 1:52 PM MST	Severe Thunderstorm Warning	TWC	Pima, Pinal	68 min
Oct 23, 2:20 PM MST	Severe Thunderstorm Warning	TWC	Pima	40 min
Oct 23, 2:59 PM MST	Flash Flood Warning	TWC	Santa Cruz	108 min
Oct 23, 3:26 PM MST	Areal Flood Advisory	TWC	Cochise, Pima, Santa Cruz	109 min

Nearby

Flash Flood Warnings in Arizona, 2018 Every flash flood 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.