Alert archive / Arizona / Severe Thunderstorm Warnings in 2010

Severe Thunderstorm Warning 23, NWS Tucson, AZ

July 17, 2010Pinal County, Arizona

NWS Tucson, AZ issued this severe thunderstorm warning at Jul 17, 2010, 9:23 PM MST for Pinal County, Arizona. It was in force for 52 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: Jul 17, 2010, 9:23 PM MST (04:23 UTC)
Expired: Jul 17, 2010, 10:15 PM MST
In force: 52 min
Issued by: NWS Tucson, AZ
Area: Storm-based polygon

County Pinal County, AZ

The radar

The Phoenix radar (KIWA), 52 km from the middle of the area, began a volume at 04:26 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, 4.4 hours before the alert went out and 92 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: 123 J/kg
Mixed-layer CIN: -68 J/kg
Mixed-layer LCL: 2450 m above ground
0-6 km bulk shear: 28 kt
0-1 km storm-relative helicity: 108 m²/s²
0-3 km storm-relative helicity: 155 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.3

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 Tucson, AZ wrote its last area forecast discussion before this severe thunderstorm warning went out at Jul 17, 8:32 PM MST, 51 minutes earlier.

Area forecast discussion, Jul 17, 8:32 PM MST, 51 minutes before

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Hazardous weather outlook, Jul 17, 10:20 AM MST, 11 hours 3 minutes before

HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE TUCSON AZ
1020 AM MST SAT JUL 17 2010

AZZ019-029>035-181400-
NORTHERN GREENLEE COUNTY-SOUTHEAST PINAL COUNTY-
UPPER GILA RIVER VALLEY-WESTERN PIMA COUNTY-TOHONO OODHAM NATION-
TUCSON METRO/MARANA/GREEN VALLEY-SANTA CRUZ COUNTY-COCHISE COUNTY-
1020 AM MST SAT JUL 17 2010

THIS HAZARDOUS WEATHER OUTLOOK IS FOR PORTIONS OF SOUTH CENTRAL
ARIZONA AND SOUTHEAST ARIZONA.

.DAY ONE...TODAY AND TONIGHT

A VERY MOIST AND UNSTABLE ATMOSPHERE IS IN PLACE ACROSS SOUTHEAST
ARIZONA TODAY WILL LEAD TO SCATTERED SHOWERS AND THUNDERSTORMS THIS
AFTERNOON AND EVENING. A WEAK DISTURBANCE IN SOUTHERN NEW MEXICO
WILL CONTINUE TO TRACK WEST INTO THE SOUTHEAST CORNER OF THE STATE.
THIS WILL RESULT IN A STRONGER FLOW IN THE LOWER TO MIDDLE LEVELS OF
THE ATMOSPHERE...ALLOWING STORMS TO BECOME MORE ORGANIZED. SOME OF
THESE STORMS WILL BE CAPABLE OF PRODUCING WIND GUSTS UP TO 50 MPH
AND LOCALIZED HEAVY RAINFALL. RAINFALL AMOUNTS NEAR THE STRONGEST
STORMS MAY APPROACH ONE INCH...WHICH MAY PRODUCE LOCALIZED FLOODING
PROBLEMS.

THIS DISTURBANCE WILL NOT ONLY INCREASE THE COVERAGE OF STORMS LATE
THIS AFTERNOON AND EVENING...BUT MAY ALLOW STORMS TO PERSIST INTO
THE EARLY MORNING HOURS.

.DAYS TWO THROUGH SEVEN...SUNDAY THROUGH FRIDAY

A FAVORABLE FLOW PATTERN WILL CONTINUE SUNDAY. EXPECT ANOTHER DAY OF
ELEVATED THUNDERSTORM CHANCES...WITH A FEW STRONG STORMS POSSIBLE.

.SPOTTER INFORMATION STATEMENT...

WEATHER SPOTTERS ARE ENCOURAGED TO REPORT SIGNIFICANT WEATHER
CONDITIONS ACCORDING TO STANDARD OPERATING PROCEDURES.

WEATHER.GOV/TUCSON

In the hours before

Local storm report, Jul 17, 5:44 PM MST, 3 hours 39 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE TUCSON AZ
544 PM MST SAT JUL 17 2010

..TIME...   ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
..DATE...   ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
            ..REMARKS..

0500 PM     TSTM WND DMG     1 SE RITA RANCH         32.10N 110.77W
07/17/2010                   PIMA               AZ   TRAINED SPOTTER

            SEVERAL TREES DOWNED. ALSO 1.15 INCHES OF RAIN IN 30
            MINUTES.

&&

PYTLAK

Local storm report, Jul 17, 5:46 PM MST, 3 hours 37 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE TUCSON AZ
546 PM MST SAT JUL 17 2010

..TIME...   ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
..DATE...   ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
            ..REMARKS..

0530 PM     HEAVY RAIN       1 SSE RITA RANCH        32.10N 110.78W
07/17/2010  M1.00 INCH       PIMA               AZ   TRAINED SPOTTER

            MOST RAIN FELL IN ONYL 15 MINUTES.

&&

PYTLAK

Local storm report, Jul 17, 6:17 PM MST, 3 hours 6 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE TUCSON AZ
617 PM MST SAT JUL 17 2010

..TIME...   ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
..DATE...   ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
            ..REMARKS..

0610 PM     TSTM WND DMG     SELLS                   31.92N 111.88W
07/17/2010                   PIMA               AZ   LAW ENFORCEMENT

            WINDOWS BLOWN OUT OF HOUSE.

&&

PYTLAK

Local storm report, Jul 17, 8:12 PM MST, 1 hour 11 minutes before

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Special weather statement, Jul 17, 8:31 PM MST, 52 minutes before

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Special weather statement, Jul 17, 8:56 PM MST, 27 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 17, 5:22 PM MST	Areal Flood Advisory	TWC	Pima	83 min
Jul 17, 5:29 PM MST	Severe Thunderstorm Warning	TWC	Pima	46 min
Jul 17, 5:29 PM MST	Severe Thunderstorm Warning	TWC	Pima	46 min
Jul 17, 5:46 PM MST	Areal Flood Advisory	TWC	Pima	34 min
Jul 17, 6:12 PM MST	Severe Thunderstorm Warning	TWC	Pima	63 min
Jul 17, 6:30 PM MST	Severe Thunderstorm Warning	TWC	Cochise, Graham	30 min
Jul 17, 6:37 PM MST	Areal Flood Advisory	TWC	Cochise	83 min
Jul 17, 6:48 PM MST	Areal Flood Advisory	TWC	Pima	117 min
Jul 17, 7:00 PM MST	Severe Thunderstorm Warning	TWC	Cochise, Graham	30 min
Jul 17, 7:14 PM MST	Severe Thunderstorm Warning	TWC	Pima	27 min
Jul 17, 8:31 PM MST	Special Weather Statement	TWC	Santa Cruz	44 min
Jul 17, 8:54 PM MST	Areal Flood Advisory	TWC	Pima	3 hr
Jul 17, 8:56 PM MST	Special Weather Statement	TWC		49 min
Jul 18, 12:49 PM MST	Special Weather Statement	TWC	Greenlee	41 min
Jul 18, 3:33 PM MST	Severe Thunderstorm Warning	TWC	Graham, Greenlee	27 min
Jul 18, 3:57 PM MST	Severe Thunderstorm Warning	TWC	Graham, Greenlee	63 min

Nearby

Severe Thunderstorm Warnings in Arizona, 2010 Every severe thunderstorm warning in 2010

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.