Alert archive / Arizona / Flash Flood Warnings in 2021
Flash Flood Warning 133, NWS Tucson, AZ
NWS Tucson, AZ issued this flash flood warning at Aug 16, 2021, 1:49 PM MST for Pinal 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 16, 2021, 1:49 PM MST (20:49 UTC)
- Expired
- Aug 16, 2021, 5:00 PM MST
- In force
- 3 hr
- Issued by
- NWS Tucson, AZ
- Area
- Storm-based polygon
- Damage threat
- Considerable
- Flood severity
- None
County Pinal County, AZ
The radar
The Phoenix radar (KIWA), 98 km from the middle of the area, began a volume at 20:50 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, 8.8 hours before the alert went out and 68 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
- 1291 J/kg
- Mixed-layer CIN
- -54 J/kg
- Mixed-layer LCL
- 1297 m above ground
- 0-6 km bulk shear
- 9 kt
- 0-1 km storm-relative helicity
- 4 m²/s²
- 0-3 km storm-relative helicity
- -3 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted.
674
WGUS55 KTWC 162049
FFWTWC
AZC021-170000-
/O.NEW.KTWC.FF.W.0133.210816T2049Z-210817T0000Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
BULLETIN - EAS ACTIVATION REQUESTED
Flash Flood Warning
National Weather Service Tucson AZ
149 PM MST Mon Aug 16 2021
The National Weather Service in Tucson has issued a
* Flash Flood Warning for...
East Central Pinal County in southeastern Arizona...
* Until 500 PM MST.
* At 149 PM MST, Doppler radar indicated thunderstorms producing
heavy rain across the warned area. Between 1 and 2 inches of rain
have fallen with isolated areas up to 3 inches. Additional
rainfall amounts up to 1 inch 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...
Dudleyville.
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 3268 11088 3278 11091 3287 11089 3287 11079
3285 11072 3283 11071 3268 11074
FLASH FLOOD...RADAR INDICATED
FLASH FLOOD DAMAGE THREAT...CONSIDERABLE
$$
AH2 follow-up statements
977
WGUS75 KTWC 162152
FFSTWC
Flash Flood Statement
National Weather Service Tucson AZ
252 PM MST Mon Aug 16 2021
AZC021-170000-
/O.CON.KTWC.FF.W.0133.000000T0000Z-210817T0000Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Pinal AZ-
252 PM MST Mon Aug 16 2021
...FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 5 PM MST THIS
AFTERNOON FOR EAST CENTRAL PINAL COUNTY...
At 252 PM MST, Doppler radar indicated thunderstorms producing heavy
rain across the warned area. Between 1 and 3 inches of rain have
fallen. Flash flooding is ongoing or expected to begin shortly.
HAZARD...Life threatening flash flooding. Thunderstorms producing
flash flooding.
SOURCE...Radar.
IMPACT...Life threatening flash flooding of creeks and streams,
urban areas, highways, streets and underpasses.
Some locations that will experience flash flooding include...
Dudleyville.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Turn around, don't drown when encountering flooded roads. Most flood
deaths occur in vehicles.
Be aware of your surroundings and do not drive on flooded roads.
&&
LAT...LON 3268 11088 3278 11091 3287 11089 3287 11079
3285 11072 3283 11071 3268 11074
FLASH FLOOD...RADAR INDICATED
FLASH FLOOD DAMAGE THREAT...CONSIDERABLE
$$
AH444
WGUS75 KTWC 162354
FFSTWC
Flash Flood Statement
National Weather Service Tucson AZ
454 PM MST Mon Aug 16 2021
AZC021-170004-
/O.EXP.KTWC.FF.W.0133.000000T0000Z-210817T0000Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Pinal AZ-
454 PM MST Mon Aug 16 2021
...FLASH FLOOD WARNING WILL EXPIRE AT 5 PM MST THIS AFTERNOON FOR
EAST CENTRAL PINAL COUNTY...
The heavy rain has ended. Flooding is no longer expected to pose a
threat. Flows will continue in area washes into the evening. Please
continue to heed remaining road closures.
A Flash Flood Watch remains in effect until 200 AM MST Tuesday for a
portion of Southeast Arizona.
LAT...LON 3268 11088 3278 11091 3287 11089 3287 11079
3285 11072 3283 11071 3268 11074
$$
JRMThe office that day
Everything else NWS Tucson, AZ issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Aug 15, 7:02 PM MST | Special Weather Statement | TWC | Greenlee | 43 min |
| Aug 15, 7:47 PM MST | Special Weather Statement | TWC | Graham | 58 min |
| Aug 15, 8:30 PM MST | Severe Thunderstorm Warning | TWC | Graham, Pinal | 46 min |
| Aug 16, 12:20 PM MST | Severe Thunderstorm Warning | TWC | Pinal | 55 min |
| Aug 16, 12:39 PM MST | Flash Flood Warning | TWC | Pinal | 3 hr |
| Aug 16, 1:27 PM MST | Severe Thunderstorm Warning | TWC | Pinal | 48 min |
| Aug 16, 3:06 PM MST | Areal Flood Advisory | TWC | Graham, Greenlee | 3 hr |
| Aug 16, 3:11 PM MST | Special Weather Statement | TWC | Santa Cruz | 34 min |
| Aug 16, 3:14 PM MST | Special Weather Statement | TWC | Graham | 46 min |
| Aug 16, 3:58 PM MST | Special Weather Statement | TWC | Graham | 47 min |
| Aug 16, 4:38 PM MST | Areal Flood Advisory | TWC | Graham, Greenlee | 3 hr |
| Aug 16, 4:44 PM MST | Severe Thunderstorm Warning | TWC | Graham | 46 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.