Alert archive / Arizona / Severe Thunderstorm Warnings in 2009

Severe Thunderstorm Warning 13, NWS Tucson, AZ

July 8, 2009Cochise County, Graham County, Pima County, Arizona

NWS Tucson, AZ issued this severe thunderstorm warning at Jul 8, 2009, 5:29 PM MST for Cochise County, Graham County, Pima County, Arizona. It was in force for 31 min. 1 report came from inside the area while it was in force.

The area

The outline as issued, with what was reported inside it.

The facts

Issued
Jul 8, 2009, 5:29 PM MST (00:29 UTC)
Expired
Jul 8, 2009, 6:00 PM MST
In force
31 min
Issued by
NWS Tucson, AZ
Area
Storm-based polygon

Counties Cochise County, AZ, Graham County, AZ, Pima County, AZ

The radar

The Tucson radar (KEMX), 52 km from the middle of the area, began a volume at 00:31 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.

What was reported inside it

TimeReportWhereRemark
Jul 8, 5:40 PM MSTTSTM WND DMG2 W Tucson, AZPOWER POLES DOWNED NEAR GRANDE AND ST. MARYS RDS.

Local storm reports filed while the alert was in force, from inside its polygon or its counties.

The nearest sounding before it

Tuscon, AZ (KTUS), launched 00:00Z, 0.5 hours before the alert went out and 18 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 2009-07-09Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 577 joules per kilogram.LCLLFCEL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Tuscon, AZ at 00:00Z on 2009-07-09The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity -27 square meters per square second.1939Sfc1 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
577 J/kg
Mixed-layer CIN
-39 J/kg
Mixed-layer LCL
2808 m above ground
0-6 km bulk shear
6 kt
0-1 km storm-relative helicity
-27 m²/s²
0-3 km storm-relative helicity
-45 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

Open this sounding in Storm Lab

The text

As transmitted, in the capitals the NWS used until 2016.

000 
WUUS55 KTWC 090029
SVRTWC
AZC003-009-019-090100-
/O.NEW.KTWC.SV.W.0013.090709T0029Z-090709T0100Z/

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE TUCSON AZ
529 PM MST WED JUL 8 2009

THE NATIONAL WEATHER SERVICE IN TUCSON HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  NORTHEASTERN PIMA COUNTY IN SOUTH CENTRAL ARIZONA...
  THIS INCLUDES THE CITIES OF...TUCSON...SEVEN FALLS...
  NORTHWESTERN COCHISE COUNTY IN SOUTHEAST ARIZONA...
  EXTREME SOUTHWESTERN GRAHAM COUNTY IN SOUTHEAST ARIZONA...

* UNTIL 600 PM MST

* AT 526 PM MST...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  SEVERE THUNDERSTORM CAPABLE OF PRODUCING PENNY SIZE HAIL...AND
  DAMAGING WINDS IN EXCESS OF 60 MPH.  THIS STORM WAS NEAR REDDINGTON PASS
  MOVING WEST AT 15 MPH.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

EXPECT DAMAGING WINDS IN EXCESS OF 60 MPH...LARGE HAIL...FREQUENT
LIGHTNING...AND HEAVY RAIN WITH THIS STORM.

&&

LAT...LON 3253 11068 3243 11026 3197 11124 3217 11135
TIME...MOT...LOC 0028Z 105DEG 11KT 3240 11046

$$
2 follow-up statements
000 
WWUS55 KTWC 090047
SVSTWC

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE TUCSON AZ
547 PM MST WED JUL 8 2009

AZC003-009-019-090100-
/O.CON.KTWC.SV.W.0013.000000T0000Z-090709T0100Z/
GRAHAM AZ-COCHISE AZ-PIMA AZ-
547 PM MST WED JUL 8 2009

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 600 PM MST
FOR NORTHEASTERN PIMA...NORTHWESTERN COCHISE AND EXTREME SOUTHWESTERN
GRAHAM COUNTIES...

AT 544 PM MST...NATIONAL WEATHER SERVICE DOPPLER RADAR CONTINUED TO
INDICATE A COUPLE OF SEVERE THUNDERSTORMS CAPABLE OF PRODUCING PENNY 
SIZE HAIL...AND DAMAGING WINDS IN EXCESS OF 60 MPH 3 MILES SOUTHEAST 
THREE POINTS AS WILL AS NEAR THE REDINGTON PASS AREA. THESE STORMS 
WERE MOVING WEST AT 15 MPH.

SEVERAL STRONG THUNDERSTORMS CONTINUE ALONG A LINE BETWEEN THESE TWO
STORMS...AND ALL ARE CAPABLE OF PRODUCING DAMAGING WINDS TO 60 MPH. 

LAT...LON 3253 11068 3243 11026 3197 11124 3217 11135
TIME...MOT...LOC 0044Z 105DEG 11KT 3241 11051

$$
000 
WWUS55 KTWC 090058
SVSTWC

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE TUCSON AZ
558 PM MST WED JUL 8 2009

AZC003-009-019-090106-
/O.EXP.KTWC.SV.W.0013.000000T0000Z-090709T0100Z/
GRAHAM AZ-COCHISE AZ-PIMA AZ-
558 PM MST WED JUL 8 2009

...THE SEVERE THUNDERSTORM WARNING FOR NORTHEASTERN PIMA...
NORTHWESTERN COCHISE AND EXTREME SOUTHWESTERN GRAHAM COUNTIES WILL
EXPIRE AT 600 PM MST...

ALTHOUGH STRONG THUNDERSTORMS CONTINUE ACROSS NORTHEAST PIMA 
COUNTY...THE STORMS HAVE FALLEN BELOW SEVERE LEVELS. THEREFORE...THE 
SEVERE THUNDERSTORM WARNING HAS BEEN ALLOWED TO EXPIRE AT 6 PM MST. 

HOWEVER...A STRONG THUNDERSTORM 4 MILES WEST OF MARANA WILL BE 
CAPABLE OF PRODUCING VERY HEAVY RAINFALL AND WIND GUSTS TO 50 MPH.

LAT...LON 3253 11068 3243 11026 3197 11124 3217 11135
TIME...MOT...LOC 0056Z 105DEG 11KT 3242 11055

$$

The office that day

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

IssuedProductOfficeCountiesLasted
Jul 8, 5:40 PM MSTFlash Flood WarningTWCPima95 min
Jul 8, 5:54 PM MSTFlash Flood WarningTWCGraham81 min
Jul 8, 6:20 PM MSTSevere Thunderstorm WarningTWCGraham25 min
Jul 8, 6:37 PM MSTSevere Thunderstorm WarningTWCPinal38 min
Jul 8, 6:43 PM MSTSevere Thunderstorm WarningTWCGraham47 min
Jul 8, 7:06 PM MSTAreal Flood AdvisoryTWCGraham, Pima, Pinal3 hr

Nearby

Severe Thunderstorm Warnings in Arizona, 2009Every severe thunderstorm warning in 2009

Sources

The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.