Alert archive / Arizona / Special Weather Statements in 2021
Special Weather Statement, NWS Tucson, AZ
NWS Tucson, AZ issued this special weather statement at Sep 30, 2021, 12:57 AM MST for Pinal County, Arizona. It was in force for 33 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 30, 2021, 12:57 AM MST (07:57 UTC)
- Expired
- Sep 30, 2021, 1:30 AM MST
- In force
- 33 min
- Issued by
- NWS Tucson, AZ
- Hail
- 0.25 in
- Wind
- 40
County Pinal County, AZ
The radar
The Phoenix radar (KIWA), 85 km from the middle of the area, began a volume at 08:01 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 00:00Z, 8.0 hours before the alert went out and 61 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
- 314 J/kg
- Mixed-layer CIN
- -91 J/kg
- Mixed-layer LCL
- 2898 m above ground
- 0-6 km bulk shear
- 31 kt
- 0-1 km storm-relative helicity
- 11 m²/s²
- 0-3 km storm-relative helicity
- 31 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.4
The text
As transmitted.
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</html>What forecasters said that day
The local office's own words before this special weather statement went out, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.
NWS Tucson, AZ wrote its last area forecast discussion before this special weather statement went out at Sep 29, 2:08 PM MST, 10 hours 49 minutes earlier.
Area forecast discussion, Sep 29, 2:08 PM MST, 10 hours 49 minutes before
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</head>
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The site you requested is temporarily down for maintenance or an unexpected outage.
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</html>In the hours before
Special weather statement, Sep 30, 12:57 AM MST, 0 minutes before
Special Weather Statement
National Weather Service Tucson AZ
1257 AM MST Thu Sep 30 2021
AZZ505-506-300830-
Southeast Pinal County including Kearny/Mammoth/Oracle-South Central
Pinal County including Eloy/Picacho Peak State Park-
1257 AM MST Thu Sep 30 2021
...A strong thunderstorm will impact portions of south central Pinal
County through 130 AM MST...
At 1257 AM MST, Doppler radar was tracking a strong thunderstorm 16
miles east of Picacho Peak State Park, or 20 miles north of Marana,
moving east at 25 mph.
HAZARD...Winds in excess of 40 mph and pea size hail.
SOURCE...Radar indicated.
IMPACT...Gusty winds could knock down tree limbs and blow around
unsecured objects. Minor damage to outdoor objects is
possible.
This storm will remain over mainly remote areas of south central
Pinal County.
This includes Route 79 between mile markers 98 and 113.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
If outdoors, consider seeking shelter inside a building.
This storm may intensify, so be certain to monitor local radio
stations and available television stations for additional information
and possible warnings from the National Weather Service.
&&
LAT...LON 3259 11120 3277 11126 3287 11099 3264 11088
TIME...MOT...LOC 0757Z 253DEG 22KT 3271 11114
MAX HAIL SIZE...0.25 IN
MAX WIND GUST...40 MPHThe office that day
Everything else NWS Tucson, AZ issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Sep 29, 11:08 PM MST | Flash Flood Warning | TWC | Pima | 112 min |
| Sep 29, 11:25 PM MST | Areal Flood Advisory | TWC | Pima | 3 hr |
| Sep 29, 11:51 PM MST | Flash Flood Warning | TWC | Pima | 3 hr |
| Sep 29, 11:57 PM MST | Severe Thunderstorm Warning | TWC | Pinal | 48 min |
| Sep 30, 12:13 AM MST | Severe Thunderstorm Warning | TWC | Pima | 47 min |
| Sep 30, 12:24 AM MST | Areal Flood Advisory | TWC | Pima, Pinal | 3 hr |
| Sep 30, 12:40 AM MST | Severe Thunderstorm Warning | TWC | Pinal | 50 min |
| Sep 30, 3:21 AM MST | Special Weather Statement | TWC | 39 min | |
| Sep 30, 4:05 AM MST | Areal Flood Advisory | TWC | Cochise | 115 min |
| Sep 30, 12:58 PM MST | Special Weather Statement | TWC | Santa Cruz | 47 min |
| Sep 30, 2:23 PM MST | Areal Flood Advisory | TWC | Cochise | 97 min |
Nearby
Special Weather Statements in Arizona, 2021Every special weather statement 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.