Alert archive / Alabama / Severe Thunderstorm Warnings in 1990
Severe Thunderstorm Warning 138, NWS Birmingham, AL
NWS Birmingham, AL issued this severe thunderstorm warning at Aug 20, 1990, 3:25 PM CDT for Jefferson County, Alabama. It was in force for 35 min. 1 report came from inside the area while it was in force.
The area
The counties it named, with what was reported inside it.
The facts
- Issued
- Aug 20, 1990, 3:25 PM CDT (20:25 UTC)
- Expired
- Aug 20, 1990, 4:00 PM CDT
- In force
- 35 min
- Issued by
- NWS Birmingham, AL
- Area
- Whole counties
County Jefferson County, AL
The radar
The WSR-88D network and its archive begin in 1991, so there is no radar volume for this alert.
What was reported inside it
| Time | Report | Where | Remark |
|---|---|---|---|
| Aug 20, 3:35 PM CDT | Thunderstorm Wind 0 | Jefferson, AL |
NCEI Storm Data entries that began inside the alert's area while it was in force. Before 2003 the local storm report archive is thin, so this is the record of what happened rather than what was phoned in. Storm Data before 1996 records only tornadoes, thunderstorm wind and hail.
The nearest sounding before it
Centreville/Bibb, AL (KCKL), launched 12:00Z, 8.4 hours before the alert went out and 78 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.
- Mixed-layer CAPE
- 0 J/kg
- Mixed-layer CIN
- No buoyant parcel
- Mixed-layer LCL
- 0 m above ground
- 0-6 km bulk shear
- 10 kt
- 0-1 km storm-relative helicity
- 16 m²/s²
- 0-3 km storm-relative helicity
- 13 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted, in the capitals the NWS used until 2016.
000 TTAA00 KBHM 202027 SVRBHM ALC073-202100- BULLETIN - IMMEDIATE BROADCAST REQUESTED SEVERE THUNDERSTORM WARNING NATIONAL WEATHER SERVICE BIRMINGHAM AL 325 PM CDT MON AUG 20 1990 THE NATIONAL WEATHER SERVICE IN BIRMINGHAM HAS ISSUED A SEVERE THUNDERSTORM WARNING EFFECTIVE UNTIL 400 PM CDT FOR PEOPLE IN THE FOLLOWING LOCATION... IN NORTH ALABAMA ...NORTHERN JEFFERSON COUNTY AT 325 PM WEATHER SERVICE RADAR AND SPOTTER REPORTS CONTINUE TO INDICATE A SEVERE THUNDERSTORM IN NORTHERN JEFFERSON COUNTY. THE STORM WAS MOVING VERY SLOWLY TO THE SOUTH AT ABOUT 5 MPH. IF YOU ARE CAUGHT OUTSIDE...SEEK SHELTER FROM THE WEATHER IN A STRONG BUILDING. DAMAGING WIND...LARGE HAIL...VERY HEAVY RAIN... AND DEADLY LIGHpTNING ARE ALL POSSIBLE IN SEVERE THUNDERSTORMS. STAY INSIDE AWAY FROM WINDOWS UNTIL THE STORM HAS PASSED.
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.
In the hours before
Local storm report, Aug 20, 10:07 AM CDT, 5 hours 18 minutes before
STORM REPORT NATIONAL WEATHER SERVICE MONTGOMERY AL 1000AM CDT MON AUG 20 1990 ADDITIONAL STORM REPORTS FOR STORMS OF AUGUST 19TH, 1990DAY'S STORM.. PIKE COUNTY...5 30PM CDT...TREES DOWN SEVERAL LOCATION IN COUNTY... CHICKEN HOUSE DAMAGED IN GOSHEN AND HENDERSON. CITY OF TROY WITHOUT ELECTRICITY UNTIL 1030PM CDT. SMALL HAIL AND 3 INCHES OF RAIN. WARNINGS IN EFFECT...NONE CRENSHAW COUNTY...AROUND 5PM CDT...TREES AND POWER LINES DOWN AT HIGHLAND HOME. REPORT FROM CO-OP OBSERVER. WARNINGS IN EFFECT...NONE. PETTIT
Local storm report, Aug 20, 12:13 PM CDT, 3 hours 12 minutes before
STORM REPORT
NATIONAL WEATHER SERVICE BIRMINGHAM AL
1215 PM CDT MON AUG 20 1990
...DELAYED STORM REPORTS FOR AUGUST 19 1990...
THESE EVENTS OCCURRED AROUND 5 PM AT UNION GROVE CLOSE TO THE JEMISON EXIT.
ON I 65.
...21 ACRES OF APPLE TREES WERE HEAVILY DAMAGED BY WINDS
AS WELL AS ROOF BLOWN OFF NEARBY BARN.
...AT KOA CAMPGROUND...ROOF OFF ADMINSTRATION BUILDING
RESULTING IN WATER DAMAGE TO OFFICES.
...SEVERAL LIGHT^ POLES AND SIGN WERE BLOWN DOWN.
NO WARNINGS WERE IN EFFECT.
INFORMATION RELAYED TO STATE EMA BY CHILTON COUNTY EMERGENCY MANAGEMENT
OFFICALSpecial weather statement, Aug 20, 1:31 PM CDT, 1 hour 54 minutes before
ALZ004>009-011-201930- SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE BIRMINGHAM AL 130 PM CDT MON AUG 20 1990 SHOWERS AND A FEW THUNDERSTORMS ARE FIRING UP QUICKLY ACROSS CENTRAL ALABAMA THIS AFTERNOON. AT 125 PM WEATHER SERVICE RADAR AT CENTREVILLE INDICATED A BROKEN LINE OF SHOWERS AND STORMS WHICH EXTENDED FROM NEAR COLLINSVILLE IN DE KALB COUNTY WESTWARD INTO NORTHERN CULLMAN...WINSTON AND MARION COUNTIES. ANOTHER STRONG STORM WAS IN CLAY COUNTY ABOUT 10 MILES EAST OF ASHLAND. MOVEMENT OF THE STORMS WERE SLOW AND ERRATIC AND BECAUSE OF THIS...VERY HEAVY DOWNPOURS ARE POSSIBLE RESULTING IN LARGE AMOUNTS OF RAIN IN A SHORT TIME. IN ADDITION TO THE HEAVY RAIN...STRONG GUSTY WINDS AND FREQUENT LIGHTNING CAN BE EXPECTED WITH THESE STORMS. PERSONS SHOULD MOVE INSIDE A STRONG BUILDING SHOULD THREATENING WEATHER APPROACH. CONTINUE TO LISTEN TO NOAA WEATHER RADIO...LOCAL TV OR RADIO FOR LATER WEATHER UPDATES AND STATEMENTS.
Special weather statement, Aug 20, 2:04 PM CDT, 1 hour 21 minutes before
ALZ004>009-011-202000- SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE BIRMINGHAM AL 202 PM CDT MON AUG 20 1990 STRONG THUNDERSTORMS WERE DEVELOPING IN NORTHERN ALABAMA THIS AFTERNOON. AT 200 PM WEATHER SERVICE RADAR AT CENTREVILLE SHOWED NUMEROUS SHOWERS AND THUNDERSTORMS ACROSS THE NORTH HALF OF ALABAMA. SOME OF THE STORMS WERE QUITE STRONG. ONE OF THE STORMS...IN CULLMAN COUNTY...PRODUCED MARBLE SIZED HAIL...VERY STRONG GUSTY WINDS AND HEAVY DOWNPOURS AROUND 140 PM. LIGHT TO MODERATE SHOWERS WERE WIDELY SCATTERED OVER CENTRAL ALABAMA. WITH HOT AFTERNOON TEMPERATURES...A FEW THESE SHOWERS MAY BUILD INTO THUNDERSTORMS WITHIN A VERY SHORT TIME. ALABAMIANS NEED TO KEEP THIS IN MIND THIS AFTERNOON AND BE PREPARED TO MOVE TO SAFE SHELTER IF THREATENING WEATHER APPROACHES YOU. CONTINUE TO LISTEN TO NOAA WEATHER RADIO...OR LOCAL NEWS MEDIA FOR LATER WEATHER UPDATES AND STATEMENTS.
Special weather statement, Aug 20, 3:12 PM CDT, 13 minutes before
ALZ010-011-012-014-017-018-202300-
SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE MONTGOMERY AL
315 PM CDT MON AUG 20 1990
IF YOU THINK IT HAS BEEN HOT THE LAST SEVEN DAYS...YOU ARE RIGHT...
LISTED BELOW ARE MAXIMUM TEMPERATURES AT MONTGOMERY FOR THE LAST
SEVEN DAYS AND THE LAST TIME 100 DEGREE MAXIMUMS OCCURRED FOR SEVEN
CONSECUTIVE DAYS...
1990 AUGUST 14TH 101 1954 AUGUST 11TH 101
15TH 101 12TH 102
16TH 102 13TH 101
17TH 100 14TH 103
18TH 101 15TH 101
19TH 101 16TH 102
20TH 100 3PM 17TH 100
AUGUST 195_4 SHOWED 14 DAYS OF 100 OR ABOVE MAXIMUM TEMPERATURES.
SO FAR THIS AUGUST HAS PRODUCED 8 DAYS. SEVERAL OTHER PERIODS SINCE
1872 SAW 6 CONSECUTIVE DAYS WITH MAXIMUMS OF 100 OR ABOVE.The office that day
Everything else NWS Birmingham, AL issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Aug 20, 2:05 PM CDT | Severe Thunderstorm Warning | BMX | Cullman | 25 min |
| Aug 20, 2:35 PM CDT | Severe Thunderstorm Warning | BMX | Jefferson | 25 min |
| Aug 20, 2:54 PM CDT | Severe Thunderstorm Warning | BMX | Blount, Jefferson | 36 min |
| Aug 20, 3:42 PM CDT | Severe Thunderstorm Warning | BMX | Walker | 33 min |
| Aug 20, 4:11 PM CDT | Severe Thunderstorm Warning | BMX | Shelby | 34 min |
| Aug 20, 4:15 PM CDT | Severe Thunderstorm Warning | BMX | Fayette | 30 min |
| Aug 20, 4:34 PM CDT | Severe Thunderstorm Warning | BMX | Bibb | 26 min |
| Aug 20, 4:43 PM CDT | Severe Thunderstorm Warning | BMX | Fayette | 32 min |
| Aug 20, 4:56 PM CDT | Severe Thunderstorm Warning | BMX | Bibb | 34 min |
| Aug 20, 5:28 PM CDT | Severe Thunderstorm Warning | BMX | Perry | 32 min |
| Aug 20, 6:30 PM CDT | Severe Thunderstorm Warning | BMX | Greene, Hale | 45 min |
Nearby
Severe Thunderstorm Warnings in Alabama, 1990Every severe thunderstorm warning in 1990
Sources
The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; verification from NCEI's Storm Data; the sounding from the Mesonet's radiosonde archive.