Alert archive / Arizona / Flash Flood Warnings in 2021
Flash Flood Warning 6, NWS Tucson, AZ
NWS Tucson, AZ issued this flash flood warning at Jul 3, 2021, 12:17 PM MST for Pima County, Santa Cruz 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
- Jul 3, 2021, 12:17 PM MST (19:17 UTC)
- Expired
- Jul 3, 2021, 3:08 PM MST
- In force
- 3 hr
- Issued by
- NWS Tucson, AZ
- Area
- Storm-based polygon
- Damage threat
- Considerable
- Flood severity
- None
Counties Pima County, AZ, Santa Cruz County, AZ
The radar
The Tucson radar (KEMX), 56 km from the middle of the area, began a volume at 19:18 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, 7.3 hours before the alert went out and 51 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
- 278 J/kg
- Mixed-layer CIN
- -96 J/kg
- Mixed-layer LCL
- 1669 m above ground
- 0-6 km bulk shear
- 8 kt
- 0-1 km storm-relative helicity
- -64 m²/s²
- 0-3 km storm-relative helicity
- -2 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted.
012
WGUS55 KTWC 031917
FFWTWC
AZC019-023-032215-
/O.NEW.KTWC.FF.W.0006.210703T1917Z-210703T2215Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
BULLETIN - EAS ACTIVATION REQUESTED
Flash Flood Warning
National Weather Service Tucson AZ
1217 PM MST Sat Jul 3 2021
The National Weather Service in Tucson has issued a
* Flash Flood Warning for...
Southeastern Pima County in southeastern Arizona...
Northwestern Santa Cruz County in southeastern Arizona...
* Until 315 PM MST.
* At 1217 PM MST, Doppler radar indicated thunderstorms producing
heavy rain across the warned area. Between 1 and 3 inches of rain
have fallen. Additional rainfall amounts of 1 to 2 inches 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...
Green Valley, Amado and Arivaca Junction.
This includes the following streams and drainages...
South Mendoza Wash, Peñitas Wash, Sopori Wash, Demetrie Wash,
Little Thomas Wash, Puertocito Wash, Brawley Wash, Bolas Blancas
Wash, Arroyo Seco, Thomas Canyon Wash, Champurrado Wash, Soto
Wash, Santa Cruz River, Old Junction Wash, Santa Margarita Wash,
Las Guijas Wash, Brown Wash, Cerro Prieto Wash, Altar Wash, Banner
Wash, Saucito Wash and Arivaca Creek.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Turn around, don't drown when encountering flooded roads. Most flood
deaths occur in vehicles.
In hilly terrain there are hundreds of low water crossings which are
potentially dangerous in heavy rain. Do not attempt to cross flooded
roads. Find an alternate route.
&&
LAT...LON 3165 11125 3165 11150 3175 11149 3182 11145
3184 11141 3189 11131 3197 11128 3199 11118
3202 11107 3196 11100 3188 11107 3177 11109
3173 11107 3172 11106 3168 11107 3165 11110
FLASH FLOOD...RADAR INDICATED
FLASH FLOOD DAMAGE THREAT...CONSIDERABLE
$$
JM2 follow-up statements
465
WGUS75 KTWC 032022
FFSTWC
Flash Flood Statement
National Weather Service Tucson AZ
122 PM MST Sat Jul 3 2021
AZC019-023-032215-
/O.CON.KTWC.FF.W.0006.000000T0000Z-210703T2215Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Pima AZ-Santa Cruz AZ-
122 PM MST Sat Jul 3 2021
...FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 315 PM MST THIS
AFTERNOON FOR SOUTHEASTERN PIMA AND NORTHWESTERN SANTA CRUZ
COUNTIES...
At 122 PM MST, Doppler radar indicated thunderstorms producing heavy
rain across the warned area. Between 1 and 3 inches of rain have
fallen. Additional rainfall amounts of 0.1 to 0.5 inches are
possible in the warned area. Flash flooding is ongoing or expected
to begin shortly.
HAZARD...Life threatening flash flooding. Thunderstorms producing
flash flooding.
SOURCE...Radar.
IMPACT...Life threatening flash flooding of creeks and streams,
urban areas, highways, streets and underpasses.
Some locations that will experience flash flooding include...
Green Valley, Amado and Arivaca Junction.
This includes the following streams and drainages...
South Mendoza Wash, Peñitas Wash, Sopori Wash, Demetrie Wash,
Little Thomas Wash, Puertocito Wash, Brawley Wash, Bolas Blancas
Wash, Arroyo Seco, Thomas Canyon Wash, Champurrado Wash, Soto
Wash, Santa Cruz River, Old Junction Wash, Santa Margarita Wash,
Las Guijas Wash, Brown Wash, Cerro Prieto Wash, Altar Wash, Banner
Wash, Saucito Wash and Arivaca Creek.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Turn around, don't drown when encountering flooded roads. Most flood
deaths occur in vehicles.
&&
LAT...LON 3165 11125 3165 11150 3175 11149 3182 11145
3184 11141 3189 11131 3197 11128 3199 11118
3202 11107 3196 11100 3188 11107 3177 11109
3173 11107 3172 11106 3168 11107 3165 11110
FLASH FLOOD...RADAR INDICATED
FLASH FLOOD DAMAGE THREAT...CONSIDERABLE
$$
JM331
WGUS75 KTWC 032208
FFSTWC
Flash Flood Statement
National Weather Service Tucson AZ
308 PM MST Sat Jul 3 2021
AZC019-023-032218-
/O.CAN.KTWC.FF.W.0006.000000T0000Z-210703T2215Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Pima AZ-Santa Cruz AZ-
308 PM MST Sat Jul 3 2021
...FLASH FLOOD WARNING IS CANCELLED FOR SOUTHEASTERN PIMA AND
NORTHWESTERN SANTA CRUZ COUNTIES...
The heavy rain has ended. Flash flooding is no longer expected to
pose a threat. However minor flows in area washes will continue into
early evening. Please continue to heed remaining road closures.
LAT...LON 3165 11125 3165 11150 3175 11149 3182 11145
3184 11141 3189 11131 3197 11128 3199 11118
3202 11107 3196 11100 3188 11107 3177 11109
3173 11107 3172 11106 3168 11107 3165 11110
$$
JMThe office that day
Everything else NWS Tucson, AZ issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jul 2, 5:17 PM MST | Special Weather Statement | TWC | Pinal | 43 min |
| Jul 2, 5:31 PM MST | Special Weather Statement | TWC | 44 min | |
| Jul 2, 5:35 PM MST | Severe Thunderstorm Warning | TWC | Cochise, Pima | 40 min |
| Jul 2, 6:14 PM MST | Special Weather Statement | TWC | 46 min | |
| Jul 2, 6:16 PM MST | Special Weather Statement | TWC | Pima | 29 min |
| Jul 2, 6:16 PM MST | Severe Thunderstorm Warning | TWC | Cochise, Pima | 44 min |
| Jul 2, 7:13 PM MST | Severe Thunderstorm Warning | TWC | Pima | 47 min |
| Jul 2, 7:34 PM MST | Areal Flood Advisory | TWC | Pima, Pinal | 116 min |
| Jul 3, 11:17 AM MST | Areal Flood Advisory | TWC | Cochise, Santa Cruz | 3 hr |
| Jul 3, 11:21 AM MST | Severe Thunderstorm Warning | TWC | Santa Cruz | 39 min |
| Jul 3, 11:51 AM MST | Special Weather Statement | TWC | Pima | 54 min |
| Jul 3, 11:58 AM MST | Flash Flood Warning | TWC | Cochise, Santa Cruz | 3 hr |
| Jul 3, 12:09 PM MST | Areal Flood Advisory | TWC | Pima, Santa Cruz | 111 min |
| Jul 3, 12:23 PM MST | Severe Thunderstorm Warning | TWC | Cochise, Santa Cruz | 35 min |
| Jul 3, 12:28 PM MST | Flash Flood Warning | TWC | Cochise, Pima, Santa Cruz | 3 hr |
| Jul 3, 1:07 PM MST | Flash Flood Warning | TWC | Pima | 3 hr |
| Jul 3, 1:15 PM MST | Special Weather Statement | TWC | Pima | 45 min |
| Jul 3, 1:20 PM MST | Special Weather Statement | TWC | Pima | 40 min |
| Jul 3, 1:50 PM MST | Severe Thunderstorm Warning | TWC | Cochise, Pima | 40 min |
| Jul 3, 2:14 PM MST | Special Weather Statement | TWC | 31 min | |
| Jul 3, 2:56 PM MST | Special Weather Statement | TWC | Pima | 34 min |
| Jul 3, 3:31 PM MST | Special Weather Statement | TWC | Pinal | 44 min |
| Jul 3, 3:44 PM MST | Areal Flood Advisory | TWC | Pima | 2 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.