Alert archive / Arizona / Flash Flood Warnings in 2021
Flash Flood Warning 168, NWS Tucson, AZ
NWS Tucson, AZ issued this flash flood warning at Sep 5, 2021, 5:09 PM MST for Pima County, Arizona. It was in force for 111 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, 5:09 PM MST (00:09 UTC)
- Expired
- Sep 5, 2021, 7:00 PM MST
- In force
- 111 min
- Issued by
- NWS Tucson, AZ
- Area
- Storm-based polygon
- Damage threat
- Considerable
- Flood severity
- None
County Pima County, AZ
The radar
The Tucson radar (KEMX), 46 km from the middle of the area, began a volume at 00:11 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
Phoenix, AZ (KPSR), launched 00:00Z, 0.2 hours before the alert went out and 166 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
- 48 J/kg
- Mixed-layer CIN
- -147 J/kg
- Mixed-layer LCL
- 3562 m above ground
- 0-6 km bulk shear
- 26 kt
- 0-1 km storm-relative helicity
- 19 m²/s²
- 0-3 km storm-relative helicity
- 36 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted.
397
WGUS55 KTWC 060009
FFWTWC
AZC019-060200-
/O.NEW.KTWC.FF.W.0168.210906T0009Z-210906T0200Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
BULLETIN - EAS ACTIVATION REQUESTED
Flash Flood Warning
National Weather Service Tucson AZ
509 PM MST Sun Sep 5 2021
The National Weather Service in Tucson has issued a
* Flash Flood Warning for...
Eastern Pima County in southeastern Arizona...
* Until 700 PM MST.
* At 509 PM MST, Doppler radar indicated thunderstorms producing
heavy rain across the warned area. Between 0.5 and 1.3 inches of
rain have fallen. 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...
Tucson, Davis-Monthan Air Force Base, Casas Adobes, Drexel
Heights, Flowing Wells, South Tucson and Catalina Foothills.
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 3216 11076 3215 11104 3231 11104 3231 11093
3230 11093 3225 11092 3225 11082
FLASH FLOOD...RADAR INDICATED
FLASH FLOOD DAMAGE THREAT...CONSIDERABLE
$$
GZ2 follow-up statements
408
WGUS75 KTWC 060103
FFSTWC
Flash Flood Statement
National Weather Service Tucson AZ
603 PM MST Sun Sep 5 2021
AZC019-060200-
/O.CON.KTWC.FF.W.0168.000000T0000Z-210906T0200Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Pima AZ-
603 PM MST Sun Sep 5 2021
...FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 7 PM MST THIS EVENING
FOR EASTERN PIMA COUNTY...
At 603 PM MST, Doppler radar indicated that thunderstorms earlier
had produced very heavy rainfall, with between 0.5 and 1.5 inches of
rainfall occurring in the warning area.
HAZARD...Flash flooding caused by thunderstorms.
SOURCE...Radar.
IMPACT...Flash flooding of small creeks and streams, urban areas,
highways, streets and underpasses as well as other poor
drainage and low-lying areas.
Some locations that will experience flash flooding include...
Tucson, Davis-Monthan Air Force Base, Casas Adobes, Drexel
Heights, Flowing Wells, South Tucson and Catalina Foothills.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Turn around, don't drown when encountering flooded roads. Most flood
deaths occur in vehicles.
Be aware of your surroundings and do not drive on flooded roads.
Remain alert for flooding even in locations not receiving rain.
Washes, streams, and rivers can become raging killer currents in a
matter of minutes, even from distant rainfall.
&&
LAT...LON 3216 11076 3215 11104 3231 11104 3231 11093
3230 11093 3225 11092 3225 11082
FLASH FLOOD...RADAR INDICATED
$$
GZ858
WGUS75 KTWC 060200
FFSTWC
Flash Flood Statement
National Weather Service Tucson AZ
700 PM MST Sun Sep 5 2021
AZC019-060210-
/O.EXP.KTWC.FF.W.0168.000000T0000Z-210906T0200Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Pima AZ-
700 PM MST Sun Sep 5 2021
...FLASH FLOOD WARNING HAS EXPIRED FOR EASTERN 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 3216 11076 3215 11104 3231 11104 3231 11093
3230 11093 3225 11092 3225 11082
$$
GZThe office that day
Everything else NWS Tucson, AZ issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Sep 5, 5:01 PM MST | Severe Thunderstorm Warning | TWC | Graham, Pinal | 59 min |
| Sep 5, 5:18 PM MST | Severe Thunderstorm Warning | TWC | Cochise, Graham, Pima | 42 min |
| Sep 5, 5:37 PM MST | Dust Storm Advisory | TWC | Pima, Pinal | 95 min |
| Sep 5, 5:41 PM MST | Flash Flood Warning | TWC | Pinal | 2 hr |
| Sep 5, 5:58 PM MST | Severe Thunderstorm Warning | TWC | Pima, Pinal | 47 min |
| Sep 5, 6:02 PM MST | Special Weather Statement | TWC | 43 min | |
| Sep 5, 6:39 PM MST | Areal Flood Advisory | TWC | Pima, Pinal | 2 hr |
| Sep 5, 7:05 PM MST | Special Weather Statement | TWC | Pima | 40 min |
| Sep 5, 10:09 PM MST | Areal Flood Advisory | TWC | Pima | 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.