Alert archive / Arizona / Severe Thunderstorm Warnings in 2010

Severe Thunderstorm Warning 63, NWS Tucson, AZ

August 17, 2010Graham County, Greenlee County, Arizona

NWS Tucson, AZ issued this severe thunderstorm warning at Aug 17, 2010, 3:57 PM MST for Graham County, Greenlee County, Arizona. It was in force for 63 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: Aug 17, 2010, 3:57 PM MST (22:57 UTC)
Expired: Aug 17, 2010, 5:00 PM MST
In force: 63 min
Issued by: NWS Tucson, AZ
Area: Storm-based polygon

Counties Graham County, AZ, Greenlee County, AZ

The radar

The Tucson radar (KEMX), 165 km from the middle of the area, began a volume at 22:58 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 12:00Z, 11.0 hours before the alert went out and 227 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: 1003 J/kg
Mixed-layer CIN: -134 J/kg
Mixed-layer LCL: 1847 m above ground
0-6 km bulk shear: 14 kt
0-1 km storm-relative helicity: 19 m²/s²
0-3 km storm-relative helicity: 42 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 Tucson, AZ wrote its last area forecast discussion before this severe thunderstorm warning went out at Aug 17, 2:50 PM MST, 1 hour 7 minutes earlier.

Area forecast discussion, Aug 17, 2:50 PM MST, 1 hour 7 minutes before

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Hazardous weather outlook, Aug 17, 11:55 AM MST, 4 hours 2 minutes before

HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE TUCSON AZ
1155 AM MST TUE AUG 17 2010

AZZ019-029>035-180700-
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-
1155 AM MST TUE AUG 17 2010

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

.DAY ONE...THIS AFTERNOON AND TONIGHT

THUNDERSTORMS WILL BE DEVELOPING THIS AFTERNOON INTO THE EARLY
EVENING HOURS. SOME OF THE THUNDERSTORMS WILL BE CAPABLE OF
PRODUCING HEAVY RAIN WHICH MAY LEAD TO LOCALIZED FLASH FLOODING.

.DAYS TWO THROUGH SEVEN...WEDNESDAY THROUGH MONDAY

THUNDERSTORMS ARE EXPECTED AGAIN WEDNESDAY WITH HEAVY RAIN AND GUSTY
WINDS POSSIBLE. AFTER A DOWNTURN IN THUNDERSTORM COVERAGE TOWARD THE
END OF THE WORK WEEK...AN UPTICK IN THUNDERSTORM ACTIVITY IS
FORESEEN NEXT WEEKEND.

.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, Aug 17, 1:39 PM MST, 2 hours 18 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE TUCSON AZ
139 PM MST TUE AUG 17 2010

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

0139 PM     TSTM WND GST     AJO                     32.39N 112.87W
08/17/2010  E70 MPH          PIMA               AZ   LAW ENFORCEMENT

            AT LEAST 70 MPH WINDS. PEA SIZED HAIL ALSO REPORTED ALONG
            WITH VERY HEAVY RAIN.

&&

PYTLAK

Special weather statement, Aug 17, 2:12 PM MST, 1 hour 45 minutes before

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE TUCSON AZ
212 PM MST TUE AUG 17 2010

AZZ031-172200-
WESTERN PIMA COUNTY AZ-
212 PM MST TUE AUG 17 2010

...SIGNIFICANT WEATHER ADVISORY FOR WESTERN PIMA COUNTY UNTIL 300 PM
MST...

AT 206 PM MST...NATIONAL WEATHER SERVICE DOPPLER RADAR WAS TRACKING A
STRONG THUNDERSTORM ON THE FAR EAST END OF ORGAN PIPE NATIONAL
MONUMENT...OR 48 MILES WEST OF SELLS...MOVING WEST AT 5 TO 10 MPH.

WIND GUSTS UP TO 50 MPH ARE EXPECTED WITH THIS STORM...ALONG WITH
HEAVY RAIN AND FREQUENT DANGEROUS LIGHTNING.

AREAS AFFECTED BY THIS STORM INCLUDE...ORGAN PIPE NATIONAL MONUMENT
AND LUKEVILLE.

IF THREATENING WEATHER APPROACHES YOUR AREA...TAKE SHELTER IN A
STURDY BUILDING.

LAT...LON 3195 11306 3218 11295 3207 11260 3184 11268
TIME...MOT...LOC 2111Z 095DEG 7KT 3200 11270

PYTLAK

Local storm report, Aug 17, 2:32 PM MST, 1 hour 25 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE TUCSON AZ
232 PM MST TUE AUG 17 2010

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

0130 PM     TSTM WND GST     1 S AJO                 32.37N 112.87W
08/17/2010  M91 MPH          PIMA               AZ   TRAINED SPOTTER

            ALSO 0.80 INCHES OF RAIN IN LESS THAN 45 MINUTES.

&&

PYTLAK

Local storm report, Aug 17, 2:47 PM MST, 1 hour 10 minutes before

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Local storm report, Aug 17, 2:48 PM MST, 1 hour 9 minutes before

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Special weather statement, Aug 17, 2:57 PM MST, 1 hour 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
Aug 16, 5:08 PM MST	Areal Flood Advisory	TWC	Cochise	82 min
Aug 16, 6:13 PM MST	Areal Flood Advisory	TWC	Cochise	2 hr
Aug 16, 6:56 PM MST	Special Weather Statement	TWC		64 min
Aug 17, 12:27 PM MST	Special Weather Statement	TWC		48 min
Aug 17, 12:50 PM MST	Flash Flood Warning	TWC	Pima	115 min
Aug 17, 1:09 PM MST	Severe Thunderstorm Warning	TWC	Pima	66 min
Aug 17, 1:19 PM MST	Flash Flood Warning	TWC	Pima	87 min
Aug 17, 2:12 PM MST	Special Weather Statement	TWC		48 min
Aug 17, 2:35 PM MST	Severe Thunderstorm Warning	TWC	Pima	25 min
Aug 17, 2:43 PM MST	Flash Flood Warning	TWC	Pima	2 hr
Aug 17, 2:57 PM MST	Special Weather Statement	TWC	Greenlee	48 min
Aug 17, 4:58 PM MST	Areal Flood Advisory	TWC	Graham, Greenlee	3 hr

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.