Alert archive / Arizona / Flash Flood Warnings in 2021
Flash Flood Warning 94, NWS Tucson, AZ
NWS Tucson, AZ issued this flash flood warning at Aug 8, 2021, 4:21 PM MST for Cochise County, Arizona. It was in force for 114 min. 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 8, 2021, 4:21 PM MST (23:21 UTC)
- Expired
- Aug 8, 2021, 6:15 PM MST
- In force
- 114 min
- 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), 87 km from the middle of the area, began a volume at 23:24 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, 11.4 hours before the alert went out and 126 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
- 359 J/kg
- Mixed-layer CIN
- -232 J/kg
- Mixed-layer LCL
- 1832 m above ground
- 0-6 km bulk shear
- 9 kt
- 0-1 km storm-relative helicity
- -31 m²/s²
- 0-3 km storm-relative helicity
- 51 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted.
797
WGUS55 KTWC 082321
FFWTWC
AZC003-090115-
/O.NEW.KTWC.FF.W.0094.210808T2321Z-210809T0115Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
BULLETIN - EAS ACTIVATION REQUESTED
Flash Flood Warning
National Weather Service Tucson AZ
421 PM MST Sun Aug 8 2021
The National Weather Service in Tucson has issued a
* Flash Flood Warning for...
South Central Cochise County in southeastern Arizona...
* Until 615 PM MST.
* At 421 PM MST, Doppler radar indicated thunderstorms producing
heavy rain across the warned area. Between 1 and 2 inches of rain
have fallen near Naco. 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...
Bisbee and Naco.
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 3133 11004 3139 11004 3139 10992 3139 10991
3133 10990 3133 10993 3133 11000
FLASH FLOOD...RADAR INDICATED
FLASH FLOOD DAMAGE THREAT...CONSIDERABLE
$$
JG2 follow-up statements
078
WGUS75 KTWC 090018
FFSTWC
Flash Flood Statement
National Weather Service Tucson AZ
518 PM MST Sun Aug 8 2021
AZC003-090115-
/O.CON.KTWC.FF.W.0094.000000T0000Z-210809T0115Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Cochise AZ-
518 PM MST Sun Aug 8 2021
...FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 615 PM MST THIS
EVENING FOR SOUTH CENTRAL COCHISE COUNTY...
At 518 PM MST, Doppler radar indicated that between 1 and 3 inches
of rain may have fallen near Naco from thunderstorms in the past 90
minutes. Heavy rain has ended but the threat of flash flooding
continues due to heavy run-off. Flash flooding is ongoing or
expected to begin shortly.
HAZARD...Life threatening flash flooding. Thunderstorms producing
flash flooding.
SOURCE...Radar.
IMPACT...Life threatening flash flooding of creeks and streams,
urban areas, highways, streets and underpasses.
Some locations that will experience flash flooding include...
Naco.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Turn around, don't drown when encountering flooded roads. Most flood
deaths occur in vehicles.
Be aware of your surroundings and do not drive on flooded roads.
&&
LAT...LON 3133 11004 3139 11004 3139 10992 3139 10991
3133 10990 3133 10993 3133 11000
FLASH FLOOD...RADAR INDICATED
FLASH FLOOD DAMAGE THREAT...CONSIDERABLE
$$743
WGUS75 KTWC 090110
FFSTWC
Flash Flood Statement
National Weather Service Tucson AZ
610 PM MST Sun Aug 8 2021
AZC003-090120-
/O.EXP.KTWC.FF.W.0094.000000T0000Z-210809T0115Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Cochise AZ-
610 PM MST Sun Aug 8 2021
...FLASH FLOOD WARNING WILL EXPIRE AT 615 PM MST THIS EVENING FOR
SOUTH CENTRAL COCHISE COUNTY...
Flood waters have receded. The heavy rain has ended. Flooding is no
longer expected to pose a threat. Please continue to heed remaining
road closures.
LAT...LON 3133 11004 3139 11004 3139 10992 3139 10991
3133 10990 3133 10993 3133 11000
$$The office that day
Everything else NWS Tucson, AZ issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Aug 7, 5:46 PM MST | Special Weather Statement | TWC | 44 min | |
| Aug 7, 5:54 PM MST | Special Weather Statement | TWC | Greenlee | 36 min |
| Aug 7, 6:19 PM MST | Areal Flood Advisory | TWC | Pima | 116 min |
| Aug 8, 2:48 PM MST | Severe Thunderstorm Warning | TWC | Pima | 42 min |
| Aug 8, 2:54 PM MST | Special Weather Statement | TWC | Greenlee | 36 min |
| Aug 8, 3:08 PM MST | Flash Flood Warning | TWC | Pima | 3 hr |
| Aug 8, 3:42 PM MST | Severe Thunderstorm Warning | TWC | Cochise | 33 min |
| Aug 8, 3:46 PM MST | Special Weather Statement | TWC | 44 min | |
| Aug 8, 4:11 PM MST | Special Weather Statement | TWC | Pima | 49 min |
| Aug 8, 4:12 PM MST | Special Weather Statement | TWC | Santa Cruz | 33 min |
| Aug 8, 4:19 PM MST | Severe Thunderstorm Warning | TWC | Santa Cruz | 86 min |
| Aug 8, 4:21 PM MST | Severe Thunderstorm Warning | TWC | Santa Cruz | 84 min |
| Aug 8, 4:26 PM MST | Areal Flood Advisory | TWC | Pima | 2 hr |
| Aug 8, 4:33 PM MST | Special Weather Statement | TWC | Cochise | 27 min |
| Aug 8, 4:48 PM MST | Flash Flood Warning | TWC | Santa Cruz | 3 hr |
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.