Alert archive / Arizona / Special Weather Statements in 2018

Special Weather Statement, NWS Tucson, AZ

July 28, 2018Pima County, Arizona

NWS Tucson, AZ issued this special weather statement at Jul 28, 2018, 11:57 PM MST for Pima County, Arizona. It was in force for 48 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: Jul 28, 2018, 11:57 PM MST (06:57 UTC)
Expired: Jul 29, 2018, 12:45 AM MST
In force: 48 min
Issued by: NWS Tucson, AZ

County Pima County, AZ

The radar

The Phoenix radar (KIWA), 102 km from the middle of the area, began a volume at 06:58 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, 7.0 hours before the alert went out and 107 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: 752 J/kg
Mixed-layer CIN: -55 J/kg
Mixed-layer LCL: 2539 m above ground
0-6 km bulk shear: 16 kt
0-1 km storm-relative helicity: 12 m²/s²
0-3 km storm-relative helicity: 64 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

As transmitted.

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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 Jul 28, 9:13 PM MST, 2 hours 44 minutes earlier.

Area forecast discussion, Jul 28, 9:13 PM MST, 2 hours 44 minutes before

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In the hours before

Special weather statement, Jul 28, 8:20 PM MST, 3 hours 37 minutes before

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Local storm report, Jul 28, 8:46 PM MST, 3 hours 11 minutes before

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Special weather statement, Jul 28, 9:01 PM MST, 2 hours 56 minutes before

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Special weather statement, Jul 28, 10:05 PM MST, 1 hour 52 minutes before

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Special weather statement, Jul 28, 11:00 PM MST, 57 minutes before

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Special weather statement, Jul 28, 11:57 PM MST, 0 minutes before

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The office that day

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

Issued	Product	Office	Counties	Lasted
Jul 28, 5:03 PM MST	Special Weather Statement	TWC		42 min
Jul 28, 5:20 PM MST	Special Weather Statement	TWC		40 min
Jul 28, 5:53 PM MST	Special Weather Statement	TWC		37 min
Jul 28, 6:01 PM MST	Special Weather Statement	TWC		29 min
Jul 28, 7:03 PM MST	Special Weather Statement	TWC		57 min
Jul 28, 7:26 PM MST	Severe Thunderstorm Warning	TWC	Pinal	34 min
Jul 28, 7:57 PM MST	Severe Thunderstorm Warning	TWC	Pinal	33 min
Jul 28, 8:14 PM MST	Areal Flood Advisory	TWC	Pinal	91 min
Jul 28, 8:20 PM MST	Special Weather Statement	TWC	Pinal	40 min
Jul 28, 9:01 PM MST	Special Weather Statement	TWC		29 min
Jul 28, 10:05 PM MST	Special Weather Statement	TWC	Pinal	40 min
Jul 28, 11:00 PM MST	Special Weather Statement	TWC	Pima	60 min
Jul 29, 1:29 AM MST	Areal Flood Advisory	TWC	Graham	3 hr
Jul 29, 1:33 AM MST	Special Weather Statement	TWC		57 min
Jul 29, 12:51 PM MST	Special Weather Statement	TWC	Santa Cruz	24 min
Jul 29, 2:08 PM MST	Special Weather Statement	TWC	Santa Cruz	37 min
Jul 29, 2:51 PM MST	Special Weather Statement	TWC	Greenlee	24 min
Jul 29, 3:04 PM MST	Severe Thunderstorm Warning	TWC	Greenlee	56 min
Jul 29, 3:29 PM MST	Severe Thunderstorm Warning	TWC	Pima, Santa Cruz	46 min
Jul 29, 4:00 PM MST	Areal Flood Advisory	TWC	Pima	90 min
Jul 29, 4:51 PM MST	Special Weather Statement	TWC		39 min

Nearby

Special Weather Statements in Arizona, 2018 Every special weather statement in 2018

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.