Alert archive / Arizona / Flash Flood Warnings in 2021
Flash Flood Warning 120, NWS Tucson, AZ
NWS Tucson, AZ issued this flash flood warning at Aug 13, 2021, 2:42 PM 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
- Aug 13, 2021, 2:42 PM MST (21:42 UTC)
- Expired
- Aug 13, 2021, 5:45 PM MST
- In force
- 3 hr
- Issued by
- NWS Tucson, AZ
- Area
- Storm-based polygon
- Damage threat
- Considerable
- Flood severity
- None
County Cochise County, AZ
The radar
The Tucson radar (KEMX), 75 km from the middle of the area, began a volume at 21:42 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 (KTUS), launched 12:00Z, 9.7 hours before the alert went out and 115 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.
- Mixed-layer CAPE
- 544 J/kg
- Mixed-layer CIN
- -46 J/kg
- Mixed-layer LCL
- 1049 m above ground
- 0-6 km bulk shear
- 1 kt
- 0-1 km storm-relative helicity
- -36 m²/s²
- 0-3 km storm-relative helicity
- -1 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted.
701
WGUS55 KTWC 132142
FFWTWC
AZC003-140045-
/O.NEW.KTWC.FF.W.0120.210813T2142Z-210814T0045Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
BULLETIN - EAS ACTIVATION REQUESTED
Flash Flood Warning
National Weather Service Tucson AZ
242 PM MST Fri Aug 13 2021
The National Weather Service in Tucson has issued a
* Flash Flood Warning for...
Southwestern Cochise County in southeastern Arizona...
* Until 545 PM MST.
* At 242 PM MST, Doppler radar indicated thunderstorms producing
heavy rain across the warned area. Between 1 and 2.5 inches of
rain have fallen. Additional rainfall amounts up to 1 inch are
possible in the warned area. Flash flooding is ongoing or expected
to begin shortly.
HAZARD...Life threatening flash flooding. Thunderstorms
producing flash flooding.
SOURCE...Radar.
IMPACT...Life threatening flash flooding of creeks and streams,
urban areas, highways, streets and underpasses.
* Some locations that will experience flash flooding include...
Eastern Portions of Sierra Vista, Hereford and Palominas.
This includes the following streams and drainages...
San Pedro River and Spring Creek.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Turn around, don't drown when encountering flooded roads. Most flood
deaths occur in vehicles.
Stay away or be swept away. River banks and culverts can become
unstable and unsafe.
&&
LAT...LON 3133 11012 3136 11012 3147 11015 3157 11019
3162 11003 3154 11001 3146 10997 3139 10996
3133 10996 3133 11000
FLASH FLOOD...RADAR INDICATED
FLASH FLOOD DAMAGE THREAT...CONSIDERABLE
$$
JRM1 follow-up statement
147
WGUS75 KTWC 132231
FFSTWC
Flash Flood Statement
National Weather Service Tucson AZ
331 PM MST Fri Aug 13 2021
AZC003-140045-
/O.CON.KTWC.FF.W.0120.000000T0000Z-210814T0045Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Cochise AZ-
331 PM MST Fri Aug 13 2021
...FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 545 PM MST THIS
AFTERNOON FOR SOUTHWESTERN COCHISE COUNTY...
At 331 PM MST, Doppler radar indicated thunderstorms producing heavy
rain across the warned area. Between 1 and 2.5 inches of rain have
fallen. Additional rainfall amounts up to 1 inch are possible in the
warned area. Flash flooding is already occurring on portions of
Highway 92 around Palominas and Mile marker 339. Additional flash
flooding is likely ongoing across the rest of the warned area.
HAZARD...Life threatening flash flooding. Thunderstorms producing
flash flooding.
SOURCE...Radar.
IMPACT...Life threatening flash flooding of creeks and streams,
urban areas, highways, streets and underpasses.
Some locations that will experience flash flooding include...
Sierra Vista, Hereford and Palominas.
This includes the following streams and drainages...
San Pedro River and Spring Creek.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Turn around, don't drown when encountering flooded roads. Most flood
deaths occur in vehicles.
Stay away or be swept away. River banks and culverts can become
unstable and unsafe.
&&
LAT...LON 3133 11012 3136 11012 3147 11015 3157 11019
3162 11003 3154 11001 3146 10997 3139 10996
3133 10996 3133 11000
FLASH FLOOD...RADAR INDICATED
FLASH FLOOD DAMAGE THREAT...CONSIDERABLE
$$
JRMThe office that day
Everything else NWS Tucson, AZ issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Aug 12, 6:10 PM MST | Areal Flood Advisory | TWC | Cochise | 3 hr |
| Aug 12, 6:42 PM MST | Flash Flood Warning | TWC | Cochise | 2 hr |
| Aug 12, 11:08 PM MST | Areal Flood Advisory | TWC | Santa Cruz | 112 min |
| Aug 13, 1:56 PM MST | Areal Flood Advisory | TWC | Cochise, Santa Cruz | 118 min |
| Aug 13, 2:04 PM MST | Areal Flood Advisory | TWC | Santa Cruz | 109 min |
| Aug 13, 2:25 PM MST | Special Weather Statement | TWC | Graham | 50 min |
| Aug 13, 3:14 PM MST | Special Weather Statement | TWC | Graham | 46 min |
| Aug 13, 3:20 PM MST | Special Weather Statement | TWC | 40 min | |
| Aug 13, 3:30 PM MST | Severe Thunderstorm Warning | TWC | Graham, Pinal | 45 min |
| Aug 13, 3:56 PM MST | Flash Flood Warning | TWC | Cochise | 5 hr |
| Aug 13, 4:06 PM MST | Special Weather Statement | TWC | Cochise | 39 min |
| Aug 13, 4:35 PM MST | Special Weather Statement | TWC | Santa Cruz | 25 min |
| Aug 13, 4:37 PM MST | Areal Flood Advisory | TWC | Graham, Greenlee | 113 min |
| Aug 13, 4:43 PM MST | Severe Thunderstorm Warning | TWC | Santa Cruz | 47 min |
Nearby
Flash Flood Warnings in Arizona, 2021Every flash flood warning in 2021
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.