Alert archive / Arizona / Flash Flood Warnings in 2021
Flash Flood Warning 102, NWS Tucson, AZ
NWS Tucson, AZ issued this flash flood warning at Aug 10, 2021, 8:32 AM MST for Greenlee 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 10, 2021, 8:32 AM MST (15:32 UTC)
- Expired
- Aug 10, 2021, 11:30 AM MST
- In force
- 3 hr
- Issued by
- NWS Tucson, AZ
- Area
- Storm-based polygon
- Damage threat
- Considerable
- Flood severity
- None
County Greenlee County, AZ
The radar
The Tucson radar (KEMX), 178 km from the middle of the area, began a volume at 15:34 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, 3.5 hours before the alert went out and 178 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
- 1176 J/kg
- Mixed-layer CIN
- -50 J/kg
- Mixed-layer LCL
- 1330 m above ground
- 0-6 km bulk shear
- 1 kt
- 0-1 km storm-relative helicity
- 18 m²/s²
- 0-3 km storm-relative helicity
- 16 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted.
122
WGUS55 KTWC 101532
FFWTWC
AZC011-101830-
/O.NEW.KTWC.FF.W.0102.210810T1532Z-210810T1830Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
BULLETIN - EAS ACTIVATION REQUESTED
Flash Flood Warning
National Weather Service Tucson AZ
832 AM MST Tue Aug 10 2021
The National Weather Service in Tucson has issued a
* Flash Flood Warning for...
Central Greenlee County in southeastern Arizona...
* Until 1130 AM MST.
* At 832 AM MST, Doppler radar and automated rain gauges indicated
thunderstorms producing heavy rain across the warned area. Up to 1
inch of rain has fallen. The Clifton rain gage has recorded nearly
1 inch of rain in 15 minutes. Flash flooding is ongoing or
expected to begin shortly.
HAZARD...Life threatening flash flooding. Thunderstorms
producing flash flooding.
SOURCE...Radar and automated gauges.
IMPACT...Life threatening flash flooding of creeks and streams,
urban areas, highways, streets and underpasses.
* Some locations that will experience flash flooding include...
Clifton and Morenci.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Turn around, don't drown when encountering flooded roads. Most flood
deaths occur in vehicles.
Be aware of your surroundings and do not drive on flooded roads.
&&
LAT...LON 3298 10933 3310 10940 3313 10926 3299 10919
FLASH FLOOD...RADAR AND GAUGE INDICATED
FLASH FLOOD DAMAGE THREAT...CONSIDERABLE
$$
AH2 follow-up statements
672
WGUS75 KTWC 101648
FFSTWC
Flash Flood Statement
National Weather Service Tucson AZ
948 AM MST Tue Aug 10 2021
AZC011-101830-
/O.CON.KTWC.FF.W.0102.000000T0000Z-210810T1830Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Greenlee AZ-
948 AM MST Tue Aug 10 2021
...FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 1130 AM MST THIS
MORNING FOR CENTRAL GREENLEE COUNTY...
At 948 AM MST, Doppler radar and automated rain gauges indicated
thunderstorms producing heavy rain across the warned area. Up to 1
inch of rain fell in less than a half hour. Runoff from this
rainfall is expected to cause flash flooding.
HAZARD...Life threatening flash flooding. Thunderstorms producing
flash flooding.
SOURCE...Radar and automated gauges.
IMPACT...Life threatening flash flooding of creeks and streams,
urban areas, highways, streets and underpasses.
Some locations that will experience flash flooding include...
Clifton and Morenci.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Turn around, don't drown when encountering flooded roads. Most flood
deaths occur in vehicles.
Be aware of your surroundings and do not drive on flooded roads.
&&
LAT...LON 3298 10933 3310 10940 3313 10926 3299 10919
FLASH FLOOD...RADAR AND GAUGE INDICATED
FLASH FLOOD DAMAGE THREAT...CONSIDERABLE
$$
AH242 WGUS75 KTWC 101822 FFSTWC Flash Flood Statement National Weather Service Tucson AZ 1122 AM MST Tue Aug 10 2021 AZC011-101832- /O.EXP.KTWC.FF.W.0102.000000T0000Z-210810T1830Z/ /00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/ Greenlee AZ- 1122 AM MST Tue Aug 10 2021 ...FLASH FLOOD WARNING WILL EXPIRE AT 1130 AM MST THIS MORNING FOR CENTRAL GREENLEE COUNTY... The heavy rain has ended. Flooding is no longer expected to pose a threat. Please continue to heed remaining road closures. LAT...LON 3298 10933 3310 10940 3313 10926 3299 10919 $$ AH
The office that day
Everything else NWS Tucson, AZ issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Aug 10, 4:04 AM MST | Areal Flood Advisory | TWC | Pima, Pinal | 3 hr |
| Aug 10, 4:44 AM MST | Special Weather Statement | TWC | 46 min | |
| Aug 10, 5:12 AM MST | Flash Flood Warning | TWC | Pima, Pinal | 3 hr |
| Aug 10, 5:39 AM MST | Areal Flood Advisory | TWC | Pima, Pinal | 111 min |
| Aug 10, 6:26 AM MST | Flash Flood Warning | TWC | Pima, Pinal | 5 hr |
| Aug 10, 6:49 AM MST | Areal Flood Advisory | TWC | Cochise, Graham | 116 min |
| Aug 10, 6:55 AM MST | Areal Flood Advisory | TWC | Cochise, Pima, Pinal | 4 hr |
| Aug 10, 8:27 AM MST | Areal Flood Advisory | TWC | Graham, Greenlee | 3 hr |
| Aug 10, 9:11 AM MST | Areal Flood Advisory | TWC | Pima, Santa Cruz | 3 hr |
| Aug 10, 10:51 AM MST | Areal Flood Warning | TWC | Pima, Pinal | 18 hr |
| Aug 10, 11:00 AM MST | Areal Flood Advisory | TWC | Cochise, Pima, Pinal | 2 hr |
| Aug 10, 11:09 AM MST | Areal Flood Advisory | TWC | Cochise, Graham | 111 min |
| Aug 10, 11:41 AM MST | Flash Flood Warning | TWC | Cochise | 3 hr |
| Aug 10, 12:52 PM MST | Special Weather Statement | TWC | Cochise | 38 min |
| Aug 10, 12:55 PM MST | Severe Thunderstorm Warning | TWC | Cochise | 50 min |
| Aug 10, 1:38 PM MST | Special Weather Statement | TWC | Cochise | 52 min |
| Aug 10, 1:43 PM MST | Areal Flood Advisory | TWC | Cochise | 3 hr |
| Aug 10, 1:46 PM MST | Areal Flood Advisory | TWC | Cochise | 119 min |
| Aug 10, 1:58 PM MST | Flash Flood Warning | TWC | Cochise | 3 hr |
| Aug 10, 2:00 PM MST | Special Weather Statement | TWC | 45 min | |
| Aug 10, 2:08 PM MST | Flash Flood Warning | TWC | Cochise | 2 hr |
| Aug 10, 2:39 PM MST | Flash Flood Warning | TWC | Cochise | 3 hr |
| Aug 10, 3:41 PM MST | Special Weather Statement | TWC | Santa Cruz | 34 min |
| Aug 10, 4:38 PM MST | Special Weather Statement | TWC | Santa Cruz | 52 min |
| Aug 10, 4:39 PM MST | Special Weather Statement | TWC | Pima | 36 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.