Alert archive / Arizona / Severe Thunderstorm Warnings in 2025

Severe Thunderstorm Warning 83, NWS Phoenix, AZ

September 19, 2025Maricopa County, Arizona

NWS Phoenix, AZ issued this severe thunderstorm warning at Sep 19, 2025, 1:22 AM MST for Maricopa County, Arizona. It was in force for 23 min. No storm report in the archive falls inside the area while it was in force.

The area

The counties it named.

The facts

Issued
Sep 19, 2025, 1:22 AM MST (08:22 UTC)
Expired
Sep 19, 2025, 1:45 AM MST
In force
23 min
Issued by
NWS Phoenix, AZ
Area
Storm-based polygon
Hail
1.0 in
Wind
60.0 mph

County Maricopa County, AZ

The radar

The Phoenix radar (KIWA), 77 km from the middle of the area, began a volume at 08:23 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, 8.4 hours before the alert went out and 198 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-pSkew-T log-p diagram, Tuscon, AZ at 00:00Z on 2025-09-19Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 178 joules per kilogram.LCLLFCEL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°0°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Tuscon, AZ at 00:00Z on 2025-09-19The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 61 square meters per square second.193958Sfc1 km3 km6 km9 kmRMLM
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
178 J/kg
Mixed-layer CIN
-14 J/kg
Mixed-layer LCL
3003 m above ground
0-6 km bulk shear
19 kt
0-1 km storm-relative helicity
61 m²/s²
0-3 km storm-relative helicity
67 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 severe thunderstorm 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 severe thunderstorm warning went out at Sep 18, 10:53 PM MST, 2 hours 29 minutes earlier.

Area forecast discussion, Sep 18, 10:53 PM MST, 2 hours 29 minutes before
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In the hours before

Local storm report, Sep 18, 7:45 PM MST, 5 hours 37 minutes before
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Special weather statement, Sep 18, 7:51 PM MST, 5 hours 31 minutes before
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Special weather statement, Sep 18, 8:10 PM MST, 5 hours 12 minutes before
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Special weather statement, Sep 18, 8:31 PM MST, 4 hours 51 minutes before
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Special weather statement, Sep 18, 11:57 PM MST, 1 hour 25 minutes before
Special Weather Statement
National Weather Service Phoenix AZ
1157 PM MST Thu Sep 18 2025

AZZ541-542-544>547-549-190730-
Fountain Hills/East Mesa AZ-New River Mesa AZ-
Scottsdale/Paradise Valley AZ-Cave Creek/New River AZ-Deer Valley AZ-
Rio Verde/Salt River AZ-North Phoenix/Glendale AZ-
1157 PM MST Thu Sep 18 2025

...A STRONG THUNDERSTORM WILL IMPACT MARICOPA COUNTY THROUGH 1230 AM
MST...

At 1156 PM MST, Doppler radar was tracking a strong thunderstorm over
Scottsdale, moving northeast at 20 mph.

HAZARD...Wind gusts up to 40 mph and half inch hail.

SOURCE...Radar indicated.

IMPACT...Gusty winds could knock down tree limbs and blow around
         unsecured objects. Minor damage to outdoor objects is
         possible.

Locations impacted include...
Phoenix, Scottsdale, Fountain Hills, Cave Creek, Carefree, McDowell
Mountain Park, Desert Mountain, Scottsdale Airport, Desert Ridge
Marketplace, and Rio Verde.

This includes the following highways...
AZ Route 51 between mile markers 12 and 15.
AZ Route 101 between mile markers 26 and 41.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

If outdoors, consider seeking shelter inside a building.

&&

LAT...LON 3356 11182 3364 11209 3392 11199 3382 11160
TIME...MOT...LOC 0656Z 207DEG 19KT 3370 11191

MAX HAIL SIZE...0.50 IN
MAX WIND GUST...40 MPH

GL

The office that day

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

IssuedProductOfficeCountiesLasted
Sep 18, 5:15 PM MSTFlash Flood Warning Considerable damage threatPSRGila3 hr
Sep 18, 5:34 PM MSTSpecial Weather StatementPSR26 min
Sep 18, 5:54 PM MSTSpecial Weather StatementPSRMaricopa36 min
Sep 18, 5:59 PM MSTSpecial Weather StatementPSR31 min
Sep 18, 6:01 PM MSTSpecial Weather StatementPSRYuma29 min
Sep 18, 7:01 PM MSTAreal Flood WarningPSRLa Paz, Yuma114 min
Sep 18, 7:08 PM MSTAreal Flood WarningPSRLa Paz107 min
Sep 18, 7:12 PM MSTAreal Flood WarningPSRLa Paz103 min
Sep 18, 7:48 PM MSTSevere Thunderstorm WarningPSRMaricopa27 min
Sep 18, 8:04 PM MSTSevere Thunderstorm WarningPSRMaricopa7 min
Sep 18, 8:10 PM MSTSpecial Weather StatementPSRMaricopa35 min
Sep 18, 8:51 PM MSTDust Storm AdvisoryPSRPinal24 min
Sep 18, 11:57 PM MSTSpecial Weather StatementPSR33 min
Sep 19, 2:33 AM MSTSpecial Weather StatementPSRMaricopa42 min
Sep 19, 3:28 AM MSTSpecial Weather StatementPSR47 min
Sep 19, 3:38 AM MSTAreal Flood AdvisoryPSRMaricopa35 min
Sep 19, 4:11 AM MSTFlash Flood Warning Considerable damage threatPSRMaricopa3 hr
Sep 19, 10:04 AM MSTAreal Flood AdvisoryPSRMaricopa3 hr
Sep 19, 11:16 AM MSTSpecial Weather StatementPSRMaricopa29 min
Sep 19, 12:56 PM MSTSpecial Weather StatementPSR34 min
Sep 19, 1:18 PM MSTFlash Flood Warning Considerable damage threatPSRMaricopa3 hr
Sep 18, 5:23 PM MSTSpecial Weather StatementPSRRiverside37 min
Sep 18, 5:27 PM MSTSpecial Weather StatementPSRImperial48 min
Sep 18, 5:39 PM MSTSpecial Weather StatementPSRImperial36 min
Sep 18, 5:47 PM MSTSevere Thunderstorm WarningPSRImperial28 min
Sep 18, 5:52 PM MSTFlash Flood Warning Considerable damage threatPSRImperial3 hr
Sep 18, 5:58 PM MSTSpecial Weather StatementPSRImperial32 min
Sep 18, 6:08 PM MSTSevere Thunderstorm WarningPSRImperial37 min
Sep 18, 6:12 PM MSTSpecial Weather StatementPSRImperial3 hr
Sep 18, 6:31 PM MSTFlash Flood Warning Considerable damage threatPSRImperial2 hr
Sep 18, 6:31 PM MSTSevere Thunderstorm WarningPSRImperial, Riverside29 min
Sep 18, 6:46 PM MSTSevere Thunderstorm WarningPSRImperial, Riverside29 min
Sep 18, 6:56 PM MSTSevere Thunderstorm WarningPSRImperial19 min
Sep 18, 7:11 PM MSTSpecial Weather StatementPSRRiverside49 min
Sep 18, 7:51 PM MSTSpecial Weather StatementPSRRiverside39 min
Sep 18, 8:31 PM MSTSpecial Weather StatementPSRRiverside14 min

Nearby

Severe Thunderstorm Warnings in Arizona, 2025Every severe thunderstorm warning in 2025

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.