Alert archive / Arizona / Winter Storm Warnings in 2023

Winter Storm Warning 1, NWS Phoenix, AZ

February 21, 2023Gila County, Maricopa County, Pinal County, Arizona

NWS Phoenix, AZ issued this winter storm warning at Feb 21, 2023, 2:06 AM MST for Gila County, Maricopa County, Pinal County, Arizona. It took effect at Feb 22, 2023, 2:00 AM MST. It was in force for 11 hr. No storm report in the archive falls inside the area while it was in force.

The area

The counties it named.

The facts

Issued: Feb 21, 2023, 2:06 AM MST (09:06 UTC)
In effect from: Feb 22, 2023, 2:00 AM MST
Expired: Feb 22, 2023, 1:18 PM MST
In force: 11 hr
Issued by: NWS Phoenix, AZ

Counties Gila County, AZ, Maricopa County, AZ, Pinal County, AZ

The radar

The Phoenix radar (KIWA), 13 km from the middle of the area, began a volume at 09:06 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, 9.1 hours before the alert went out and 145 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.

Skew-T log-p

Temperature in red, dew point in green, the mixed-layer parcel dashed.

Hodograph

The wind turning with height, colored by layer: ground to 1 km, 1 to 3 km, 3 to 6 km, 6 to 10 km.

Mixed-layer CAPE: 12 J/kg
Mixed-layer CIN: -6 J/kg
Mixed-layer LCL: 1653 m above ground
0-6 km bulk shear: 66 kt
0-1 km storm-relative helicity: 0 m²/s²
0-3 km storm-relative helicity: 145 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

What forecasters said that day

The local office's own words before this winter storm warning went out, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.

NWS Phoenix, AZ wrote its last area forecast discussion before this winter storm warning went out at Feb 20, 10:07 PM MST, 3 hours 59 minutes earlier.

Area forecast discussion, Feb 20, 10:07 PM MST, 3 hours 59 minutes before

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The office that day

Everything else NWS Phoenix, AZ issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
Feb 21, 2:06 AM MST	Winter Weather Advisory	PSR	Gila, Maricopa, Pinal	45 hr

Nearby

Winter Storm Warnings in Arizona, 2023 Every winter storm warning in 2023

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.