Alert archive / Arizona / Flash Flood Warnings in 2021
Flash Flood Warning 167, NWS Tucson, AZ
NWS Tucson, AZ issued this flash flood warning at Sep 5, 2021, 4:48 PM MST for Pima County, Arizona. It was in force for 117 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
- Sep 5, 2021, 4:48 PM MST (23:48 UTC)
- Expired
- Sep 5, 2021, 6:45 PM MST
- In force
- 117 min
- Issued by
- NWS Tucson, AZ
- Area
- Storm-based polygon
- Flood severity
- None
County Pima County, AZ
The radar
The Tucson radar (KEMX), 50 km from the middle of the area, began a volume at 23:48 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, 11.8 hours before the alert went out and 17 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
- 1016 J/kg
- Mixed-layer CIN
- -184 J/kg
- Mixed-layer LCL
- 1856 m above ground
- 0-6 km bulk shear
- 30 kt
- 0-1 km storm-relative helicity
- 53 m²/s²
- 0-3 km storm-relative helicity
- 20 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted.
473
WGUS55 KTWC 052348
FFWTWC
AZC019-060145-
/O.NEW.KTWC.FF.W.0167.210905T2348Z-210906T0145Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
BULLETIN - EAS ACTIVATION REQUESTED
Flash Flood Warning
National Weather Service Tucson AZ
448 PM MST Sun Sep 5 2021
The National Weather Service in Tucson has issued a
* Flash Flood Warning for...
Northeastern Pima County in southeastern Arizona...
* Until 645 PM MST.
* At 448 PM MST, Doppler radar indicated thunderstorms producing
heavy rain across the warned area. Between 0.7 and 1.5 inches of
rain have fallen. Flash flooding is ongoing or expected to begin
shortly.
HAZARD...Flash flooding caused by thunderstorms.
SOURCE...Radar.
IMPACT...Flash flooding of small creeks and streams, urban
areas, highways, streets and underpasses as well as
other poor drainage and low-lying areas.
* Some locations that will experience flash flooding include...
Tucson, Tanque Verde, Catalina Foothills, Sabino Canyon Recreation
Area and Seven Falls.
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.
Remain alert for flooding even in locations not receiving rain.
Washes, streams, and rivers can become raging killer currents in a
matter of minutes, even from distant rainfall.
&&
LAT...LON 3232 11076 3232 11077 3227 11083 3225 11082
3225 11092 3230 11093 3239 11090 3236 11076
FLASH FLOOD...RADAR INDICATED
$$
GZ2 follow-up statements
656
WGUS75 KTWC 060055
FFSTWC
Flash Flood Statement
National Weather Service Tucson AZ
555 PM MST Sun Sep 5 2021
AZC019-060145-
/O.CON.KTWC.FF.W.0167.000000T0000Z-210906T0145Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Pima AZ-
555 PM MST Sun Sep 5 2021
...FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 645 PM MST THIS
EVENING FOR NORTHEASTERN PIMA COUNTY...
At 555 PM MST, Doppler radar indicated that thunderstorms earlier
had produced very heavy rainfall, with between 1 and 2 inches of
rain occurring in the warning area.
HAZARD...Flash flooding caused by thunderstorms.
SOURCE...Radar.
IMPACT...Flash flooding of small creeks and streams, urban areas,
highways, streets and underpasses as well as other poor
drainage and low-lying areas.
Some locations that will experience flash flooding include...
Tucson, Tanque Verde, Catalina Foothills, Sabino Canyon Recreation
Area and Seven Falls.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Turn around, don't drown when encountering flooded roads. Most flood
deaths occur in vehicles.
Be aware of your surroundings and do not drive on flooded roads.
Remain alert for flooding even in locations not receiving rain.
Washes, streams, and rivers can become raging killer currents in a
matter of minutes, even from distant rainfall.
&&
LAT...LON 3232 11076 3232 11077 3227 11083 3225 11082
3225 11092 3230 11093 3239 11090 3236 11076
FLASH FLOOD...RADAR INDICATED
$$
GZ518
WGUS75 KTWC 060145
FFSTWC
Flash Flood Statement
National Weather Service Tucson AZ
645 PM MST Sun Sep 5 2021
AZC019-060155-
/O.EXP.KTWC.FF.W.0167.000000T0000Z-210906T0145Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Pima AZ-
645 PM MST Sun Sep 5 2021
...FLASH FLOOD WARNING HAS EXPIRED FOR NORTHEASTERN PIMA COUNTY...
The heavy rain has ended. Flash flooding is no longer expected to
pose a threat. Please continue to heed remaining road closures.
LAT...LON 3232 11076 3232 11077 3227 11083 3225 11082
3225 11092 3230 11093 3239 11090 3236 11076
$$
GZThe office that day
Everything else NWS Tucson, AZ issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Sep 5, 11:52 AM MST | Special Weather Statement | TWC | Santa Cruz | 23 min |
| Sep 5, 12:12 PM MST | Special Weather Statement | TWC | Cochise | 33 min |
| Sep 5, 12:24 PM MST | Severe Thunderstorm Warning | TWC | Cochise | 51 min |
| Sep 5, 12:37 PM MST | Areal Flood Advisory | TWC | Cochise | 7 min |
| Sep 5, 12:44 PM MST | Flash Flood Warning | TWC | Cochise | 106 min |
| Sep 5, 12:58 PM MST | Severe Thunderstorm Warning | TWC | Cochise | 19 min |
| Sep 5, 1:02 PM MST | Severe Thunderstorm Warning | TWC | Pima, Santa Cruz | 43 min |
| Sep 5, 1:26 PM MST | Areal Flood Advisory | TWC | Santa Cruz | 2 hr |
| Sep 5, 2:10 PM MST | Special Weather Statement | TWC | Santa Cruz | 50 min |
| Sep 5, 2:15 PM MST | Special Weather Statement | TWC | Graham | 45 min |
| Sep 5, 2:25 PM MST | Special Weather Statement | TWC | Santa Cruz | 50 min |
| Sep 5, 2:29 PM MST | Severe Thunderstorm Warning | TWC | Graham, Greenlee | 61 min |
| Sep 5, 2:31 PM MST | Severe Thunderstorm Warning | TWC | Cochise, Pima | 44 min |
| Sep 5, 2:34 PM MST | Special Weather Statement | TWC | Graham | 41 min |
| Sep 5, 2:54 PM MST | Areal Flood Advisory | TWC | Pima | 111 min |
| Sep 5, 3:08 PM MST | Severe Thunderstorm Warning | TWC | Pima, Santa Cruz | 37 min |
| Sep 5, 3:13 PM MST | Flash Flood Warning | TWC | Pima | 2 hr |
| Sep 5, 3:15 PM MST | Tornado Warning | TWC | Pima | 15 min |
| Sep 5, 3:22 PM MST | Dust Storm Warning | TWC | Pima | 113 min |
| Sep 5, 3:24 PM MST | Severe Thunderstorm Warning | TWC | Graham, Greenlee | 66 min |
| Sep 5, 3:37 PM MST | Severe Thunderstorm Warning | TWC | Pima, Santa Cruz | 53 min |
| Sep 5, 3:40 PM MST | Severe Thunderstorm Warning | TWC | Pima | 50 min |
| Sep 5, 3:41 PM MST | Flash Flood Warning | TWC | Graham | 2 hr |
| Sep 5, 3:52 PM MST | Severe Thunderstorm Warning | TWC | Pima | 38 min |
| Sep 5, 3:55 PM MST | Areal Flood Advisory | TWC | Pima | 2 hr |
| Sep 5, 4:00 PM MST | Severe Thunderstorm Warning | TWC | Graham | 45 min |
| Sep 5, 4:06 PM MST | Areal Flood Advisory | TWC | Pima | 114 min |
| Sep 5, 4:12 PM MST | Flash Flood Warning | TWC | Pima | 3 hr |
| Sep 5, 4:16 PM MST | Severe Thunderstorm Warning | TWC | Pima | 59 min |
| Sep 5, 4:30 PM MST | Severe Thunderstorm Warning | TWC | Pima | 45 min |
| Sep 5, 4:42 PM MST | Dust Storm Warning | TWC | Pima, Pinal | 93 min |
| Sep 5, 4:42 PM MST | Severe Thunderstorm Warning | TWC | Cochise, Graham | 63 min |
| Sep 5, 4:47 PM MST | Severe Thunderstorm Warning | TWC | Pima, Pinal | 43 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.